data.json

{
  "baseTemperature": 8.66,
  "monthlyVariance": [
    { "year": 1753, "month": 1, "variance": -1.366 },
    { "year": 1753, "month": 2, "variance": -2.223 },
    { "year": 1753, "month": 3, "variance": 0.211 },
    { "year": 1753, "month": 4, "variance": -0.958 },
    { "year": 1753, "month": 5, "variance": 0.175 },
    { "year": 1753, "month": 6, "variance": 1.049 },
    { "year": 1753, "month": 7, "variance": 0.464 },
    { "year": 1753, "month": 8, "variance": -0.526 },
    { "year": 1753, "month": 9, "variance": 0.470 },
    { "year": 1753, "month": 10, "variance": -0.610 },
    { "year": 1753, "month": 11, "variance": -1.452 },
    { "year": 1753, "month": 12, "variance": -4.256 },
    { "year": 1754, "month": 1, "variance": -1.748 },
    { "year": 1754, "month": 2, "variance": -4.175 },
    { "year": 1754, "month": 3, "variance": -1.448 },
    { "year": 1754, "month": 4, "variance": 2.672 },
    { "year": 1754, "month": 5, "variance": -0.031 },
    { "year": 1754, "month": 6, "variance": 0.826 },
    { "year": 1754, "month": 7, "variance": 0.082 },
    { "year": 1754, "month": 8, "variance": -1.308 },
    { "year": 1754, "month": 9, "variance": -1.773 },
    { "year": 1754, "month": 10, "variance": 0.134 },
    { "year": 1754, "month": 11, "variance": -0.629 },
    { "year": 1754, "month": 12, "variance": -0.362 },
    { "year": 1755, "month": 1, "variance": -2.384 },
    { "year": 1755, "month": 2, "variance": -2.962 },
    { "year": 1755, "month": 3, "variance": -1.498 },
    { "year": 1755, "month": 4, "variance": 0.084 },
    { "year": 1755, "month": 5, "variance": 0.784 },
    { "year": 1755, "month": 6, "variance": 1.872 },
    { "year": 1755, "month": 7, "variance": -0.270 },
    { "year": 1755, "month": 8, "variance": -1.369 },
    { "year": 1755, "month": 9, "variance": -1.096 },
    { "year": 1755, "month": 10, "variance": 0.610 },
    { "year": 1755, "month": 11, "variance": -0.772 },
    { "year": 1755, "month": 12, "variance": -2.551 },
    { "year": 1756, "month": 1, "variance": 0.554 },
    { "year": 1756, "month": 2, "variance": 2.772 },
    { "year": 1756, "month": 3, "variance": -0.995 },
    { "year": 1756, "month": 4, "variance": 0.940 },
    { "year": 1756, "month": 5, "variance": 2.365 },
    { "year": 1756, "month": 6, "variance": 1.066 },
    { "year": 1756, "month": 7, "variance": -0.741 },
    { "year": 1756, "month": 8, "variance": -1.481 },
    { "year": 1756, "month": 9, "variance": -0.221 },
    { "year": 1756, "month": 10, "variance": -2.177 },
    { "year": 1756, "month": 11, "variance": -2.535 },
    { "year": 1756, "month": 12, "variance": -3.079 },
    { "year": 1757, "month": 1, "variance": -3.552 },
    { "year": 1757, "month": 2, "variance": 0.885 },
    { "year": 1757, "month": 3, "variance": -0.588 },
    { "year": 1757, "month": 4, "variance": -0.904 },
    { "year": 1757, "month": 5, "variance": 0.943 },
    { "year": 1757, "month": 6, "variance": 3.635 },
    { "year": 1757, "month": 7, "variance": 3.031 },
    { "year": 1757, "month": 8, "variance": 2.942 },
    { "year": 1757, "month": 9, "variance": 1.807 },
    { "year": 1757, "month": 10, "variance": -3.128 },
    { "year": 1757, "month": 11, "variance": -2.799 },
    { "year": 1757, "month": 12, "variance": -4.085 },
    { "year": 1758, "month": 1, "variance": -5.045 },
    { "year": 1758, "month": 2, "variance": -2.020 },
    { "year": 1758, "month": 3, "variance": -1.596 },
    { "year": 1758, "month": 4, "variance": -2.015 },
    { "year": 1758, "month": 5, "variance": -2.437 },
    { "year": 1758, "month": 6, "variance": -0.572 },
    { "year": 1758, "month": 7, "variance": -0.952 },
    { "year": 1758, "month": 8, "variance": -2.996 },
    { "year": 1758, "month": 9, "variance": -2.763 },
    { "year": 1758, "month": 10, "variance": -6.976 },
    { "year": 1758, "month": 11, "variance": 0.036 },
    { "year": 1758, "month": 12, "variance": -1.591 },
    { "year": 1759, "month": 1, "variance": 1.665 },
    { "year": 1759, "month": 2, "variance": 0.791 },
    { "year": 1759, "month": 3, "variance": -0.933 },
    { "year": 1759, "month": 4, "variance": -3.226 },
    { "year": 1759, "month": 5, "variance": -1.923 },
    { "year": 1759, "month": 6, "variance": -0.250 },
    { "year": 1759, "month": 7, "variance": -2.330 },
    { "year": 1759, "month": 8, "variance": -0.139 },
    { "year": 1759, "month": 9, "variance": -0.204 },
    { "year": 1759, "month": 10, "variance": -1.408 },
    { "year": 1759, "month": 11, "variance": -2.637 },
    { "year": 1759, "month": 12, "variance": -4.660 },
    { "year": 1760, "month": 1, "variance": -4.089 },
    { "year": 1760, "month": 2, "variance": -0.400 },
    { "year": 1760, "month": 3, "variance": -3.389 },
    { "year": 1760, "month": 4, "variance": -1.827 },
    { "year": 1760, "month": 5, "variance": -1.498 },
    { "year": 1760, "month": 6, "variance": -1.651 },
    { "year": 1760, "month": 7, "variance": -2.058 },
    { "year": 1760, "month": 8, "variance": -0.970 },
    { "year": 1760, "month": 9, "variance": -1.695 },
    { "year": 1760, "month": 10, "variance": -2.816 },
    { "year": 1760, "month": 11, "variance": -1.405 },
    { "year": 1760, "month": 12, "variance": -2.479 },
    { "year": 1761, "month": 1, "variance": -2.906 },
    { "year": 1761, "month": 2, "variance": -0.101 },
    { "year": 1761, "month": 3, "variance": 0.726 },
    { "year": 1761, "month": 4, "variance": -1.955 },
    { "year": 1761, "month": 5, "variance": 1.372 },
    { "year": 1761, "month": 6, "variance": 3.331 },
    { "year": 1761, "month": 7, "variance": 4.471 },
    { "year": 1761, "month": 8, "variance": 0.355 },
    { "year": 1761, "month": 9, "variance": -0.387 },
    { "year": 1761, "month": 10, "variance": -2.267 },
    { "year": 1761, "month": 11, "variance": -1.781 },
    { "year": 1761, "month": 12, "variance": -6.084 },
    { "year": 1762, "month": 1, "variance": 3.413 },
    { "year": 1762, "month": 2, "variance": 1.968 },
    { "year": 1762, "month": 3, "variance": -1.680 },
    { "year": 1762, "month": 4, "variance": -0.229 },
    { "year": 1762, "month": 5, "variance": -1.263 },
    { "year": 1762, "month": 6, "variance": -0.021 },
    { "year": 1762, "month": 7, "variance": 0.084 },
    { "year": 1762, "month": 8, "variance": -1.092 },
    { "year": 1762, "month": 9, "variance": -2.625 },
    { "year": 1762, "month": 10, "variance": -3.415 },
    { "year": 1762, "month": 11, "variance": -0.523 },
    { "year": 1762, "month": 12, "variance": -2.116 },
    { "year": 1763, "month": 1, "variance": -2.222 },
    { "year": 1763, "month": 2, "variance": -2.097 },
    { "year": 1763, "month": 3, "variance": -3.653 },
    { "year": 1763, "month": 4, "variance": -1.317 },
    { "year": 1763, "month": 5, "variance": -1.383 },
    { "year": 1763, "month": 6, "variance": -1.285 },
    { "year": 1763, "month": 7, "variance": 1.797 },
    { "year": 1763, "month": 8, "variance": -0.766 },
    { "year": 1763, "month": 9, "variance": -1.564 },
    { "year": 1763, "month": 10, "variance": -3.969 },
    { "year": 1763, "month": 11, "variance": -2.062 },
    { "year": 1763, "month": 12, "variance": -0.186 },
    { "year": 1764, "month": 1, "variance": -0.763 },
    { "year": 1764, "month": 2, "variance": 2.684 },
    { "year": 1764, "month": 3, "variance": -0.214 },
    { "year": 1764, "month": 4, "variance": -1.417 },
    { "year": 1764, "month": 5, "variance": -1.021 },
    { "year": 1764, "month": 6, "variance": -1.810 },
    { "year": 1764, "month": 7, "variance": -1.903 },
    { "year": 1764, "month": 8, "variance": -1.394 },
    { "year": 1764, "month": 9, "variance": -1.100 },
    { "year": 1764, "month": 10, "variance": 0.852 },
    { "year": 1764, "month": 11, "variance": -0.102 },
    { "year": 1764, "month": 12, "variance": 2.059 },
    { "year": 1765, "month": 1, "variance": 1.161 },
    { "year": 1765, "month": 2, "variance": -0.100 },
    { "year": 1765, "month": 3, "variance": 0.893 },
    { "year": 1765, "month": 4, "variance": 0.594 },
    { "year": 1765, "month": 5, "variance": -0.445 },
    { "year": 1765, "month": 6, "variance": -2.720 },
    { "year": 1765, "month": 7, "variance": -0.539 },
    { "year": 1765, "month": 8, "variance": -0.503 },
    { "year": 1765, "month": 9, "variance": -0.826 },
    { "year": 1765, "month": 10, "variance": -1.188 },
    { "year": 1765, "month": 11, "variance": -0.321 },
    { "year": 1765, "month": 12, "variance": -0.843 },
    { "year": 1766, "month": 1, "variance": -3.393 },
    { "year": 1766, "month": 2, "variance": 0.935 },
    { "year": 1766, "month": 3, "variance": 0.025 },
    { "year": 1766, "month": 4, "variance": -0.430 },
    { "year": 1766, "month": 5, "variance": 0.013 },
    { "year": 1766, "month": 6, "variance": -0.022 },
    { "year": 1766, "month": 7, "variance": -0.918 },
    { "year": 1766, "month": 8, "variance": 0.104 },
    { "year": 1766, "month": 9, "variance": 0.532 },
    { "year": 1766, "month": 10, "variance": -0.656 },
    { "year": 1766, "month": 11, "variance": 1.438 },
    { "year": 1766, "month": 12, "variance": -0.959 },
    { "year": 1767, "month": 1, "variance": -3.186 },
    { "year": 1767, "month": 2, "variance": 0.099 },
    { "year": 1767, "month": 3, "variance": 1.227 },
    { "year": 1767, "month": 4, "variance": -1.926 },
    { "year": 1767, "month": 5, "variance": -0.744 },
    { "year": 1767, "month": 6, "variance": 1.423 },
    { "year": 1767, "month": 7, "variance": -0.840 },
    { "year": 1767, "month": 8, "variance": 1.303 },
    { "year": 1767, "month": 9, "variance": 0.076 },
    { "year": 1767, "month": 10, "variance": -0.090 },
    { "year": 1767, "month": 11, "variance": 1.920 },
    { "year": 1767, "month": 12, "variance": -2.231 },
    { "year": 1768, "month": 1, "variance": -4.652 },
    { "year": 1768, "month": 2, "variance": -3.224 },
    { "year": 1768, "month": 3, "variance": -3.548 },
    { "year": 1768, "month": 4, "variance": -1.183 },
    { "year": 1768, "month": 5, "variance": -1.942 },
    { "year": 1768, "month": 6, "variance": -0.788 },
    { "year": 1768, "month": 7, "variance": -0.107 },
    { "year": 1768, "month": 8, "variance": -0.885 },
    { "year": 1768, "month": 9, "variance": -0.925 },
    { "year": 1768, "month": 10, "variance": -1.299 },
    { "year": 1768, "month": 11, "variance": -1.154 },
    { "year": 1768, "month": 12, "variance": -0.579 },
    { "year": 1769, "month": 1, "variance": -0.242 },
    { "year": 1769, "month": 2, "variance": -1.149 },
    { "year": 1769, "month": 3, "variance": -0.835 },
    { "year": 1769, "month": 4, "variance": 0.746 },
    { "year": 1769, "month": 5, "variance": 1.868 },
    { "year": 1769, "month": 6, "variance": 1.891 },
    { "year": 1769, "month": 7, "variance": 0.124 },
    { "year": 1769, "month": 8, "variance": 0.017 },
    { "year": 1769, "month": 9, "variance": -0.333 },
    { "year": 1769, "month": 10, "variance": -3.788 },
    { "year": 1769, "month": 11, "variance": -3.204 },
    { "year": 1769, "month": 12, "variance": -4.437 },
    { "year": 1770, "month": 1, "variance": -0.730 },
    { "year": 1770, "month": 2, "variance": 0.362 },
    { "year": 1770, "month": 3, "variance": -3.908 },
    { "year": 1770, "month": 4, "variance": 1.752 },
    { "year": 1770, "month": 5, "variance": -0.977 },
    { "year": 1770, "month": 6, "variance": -1.677 },
    { "year": 1770, "month": 7, "variance": -2.671 },
    { "year": 1770, "month": 8, "variance": -1.889 },
    { "year": 1770, "month": 9, "variance": -0.778 },
    { "year": 1770, "month": 10, "variance": -0.422 },
    { "year": 1770, "month": 11, "variance": -0.101 },
    { "year": 1770, "month": 12, "variance": 1.019 },
    { "year": 1771, "month": 1, "variance": 2.507 },
    { "year": 1771, "month": 2, "variance": -3.972 },
    { "year": 1771, "month": 3, "variance": -2.900 },
    { "year": 1771, "month": 4, "variance": -2.397 },
    { "year": 1771, "month": 5, "variance": -1.648 },
    { "year": 1771, "month": 6, "variance": 0.902 },
    { "year": 1771, "month": 7, "variance": -0.280 },
    { "year": 1771, "month": 8, "variance": 0.807 },
    { "year": 1771, "month": 9, "variance": -0.297 },
    { "year": 1771, "month": 10, "variance": 1.193 },
    { "year": 1771, "month": 11, "variance": -1.046 },
    { "year": 1771, "month": 12, "variance": -0.759 },
    { "year": 1772, "month": 1, "variance": -1.426 },
    { "year": 1772, "month": 2, "variance": -2.229 },
    { "year": 1772, "month": 3, "variance": -2.906 },
    { "year": 1772, "month": 4, "variance": 0.401 },
    { "year": 1772, "month": 5, "variance": -1.738 },
    { "year": 1772, "month": 6, "variance": -0.998 },
    { "year": 1772, "month": 7, "variance": -0.057 },
    { "year": 1772, "month": 8, "variance": 0.408 },
    { "year": 1772, "month": 9, "variance": -1.479 },
    { "year": 1772, "month": 10, "variance": 0.165 },
    { "year": 1772, "month": 11, "variance": 1.865 },
    { "year": 1772, "month": 12, "variance": 2.282 },
    { "year": 1773, "month": 1, "variance": -3.205 },
    { "year": 1773, "month": 2, "variance": -2.370 },
    { "year": 1773, "month": 3, "variance": -1.442 },
    { "year": 1773, "month": 4, "variance": 0.933 },
    { "year": 1773, "month": 5, "variance": 1.432 },
    { "year": 1773, "month": 6, "variance": -0.760 },
    { "year": 1773, "month": 7, "variance": 0.061 },
    { "year": 1773, "month": 8, "variance": -0.140 },
    { "year": 1773, "month": 9, "variance": 0.622 },
    { "year": 1773, "month": 10, "variance": 0.004 },
    { "year": 1773, "month": 11, "variance": -2.526 },
    { "year": 1773, "month": 12, "variance": 1.947 },
    { "year": 1774, "month": 1, "variance": -2.839 },
    { "year": 1774, "month": 2, "variance": 1.019 },
    { "year": 1774, "month": 3, "variance": -0.332 },
    { "year": 1774, "month": 4, "variance": 1.849 },
    { "year": 1774, "month": 5, "variance": 4.937 },
    { "year": 1774, "month": 6, "variance": 1.797 },
    { "year": 1774, "month": 7, "variance": 2.136 },
    { "year": 1774, "month": 8, "variance": 0.539 },
    { "year": 1774, "month": 9, "variance": -0.865 },
    { "year": 1774, "month": 10, "variance": -0.773 },
    { "year": 1774, "month": 11, "variance": -3.202 },
    { "year": 1774, "month": 12, "variance": -2.984 },
    { "year": 1775, "month": 1, "variance": 1.531 },
    { "year": 1775, "month": 2, "variance": 2.493 },
    { "year": 1775, "month": 3, "variance": 1.732 },
    { "year": 1775, "month": 4, "variance": -0.608 },
    { "year": 1775, "month": 5, "variance": -0.110 },
    { "year": 1775, "month": 6, "variance": -1.559 },
    { "year": 1775, "month": 7, "variance": 0.011 },
    { "year": 1775, "month": 8, "variance": 0.696 },
    { "year": 1775, "month": 9, "variance": -0.917 },
    { "year": 1775, "month": 10, "variance": 0.974 },
    { "year": 1775, "month": 11, "variance": 2.114 },
    { "year": 1775, "month": 12, "variance": -2.103 },
    { "year": 1776, "month": 1, "variance": -3.611 },
    { "year": 1776, "month": 2, "variance": 0.986 },
    { "year": 1776, "month": 3, "variance": -1.390 },
    { "year": 1776, "month": 4, "variance": -1.074 },
    { "year": 1776, "month": 5, "variance": -0.981 },
    { "year": 1776, "month": 6, "variance": 0.674 },
    { "year": 1776, "month": 7, "variance": -0.565 },
    { "year": 1776, "month": 8, "variance": 1.080 },
    { "year": 1776, "month": 9, "variance": -1.447 },
    { "year": 1776, "month": 10, "variance": -1.284 },
    { "year": 1776, "month": 11, "variance": -0.671 },
    { "year": 1776, "month": 12, "variance": 1.177 },
    { "year": 1777, "month": 1, "variance": 3.156 },
    { "year": 1777, "month": 2, "variance": 0.914 },
    { "year": 1777, "month": 3, "variance": -0.800 },
    { "year": 1777, "month": 4, "variance": -2.536 },
    { "year": 1777, "month": 5, "variance": -0.254 },
    { "year": 1777, "month": 6, "variance": -1.601 },
    { "year": 1777, "month": 7, "variance": -2.050 },
    { "year": 1777, "month": 8, "variance": -1.330 },
    { "year": 1777, "month": 9, "variance": -0.935 },
    { "year": 1777, "month": 10, "variance": -2.691 },
    { "year": 1777, "month": 11, "variance": -0.974 },
    { "year": 1777, "month": 12, "variance": -0.746 },
    { "year": 1778, "month": 1, "variance": -0.376 },
    { "year": 1778, "month": 2, "variance": 1.866 },
    { "year": 1778, "month": 3, "variance": -1.760 },
    { "year": 1778, "month": 4, "variance": 2.026 },
    { "year": 1778, "month": 5, "variance": -0.276 },
    { "year": 1778, "month": 6, "variance": -0.125 },
    { "year": 1778, "month": 7, "variance": 0.378 },
    { "year": 1778, "month": 8, "variance": -1.472 },
    { "year": 1778, "month": 9, "variance": 1.002 },
    { "year": 1778, "month": 10, "variance": -1.790 },
    { "year": 1778, "month": 11, "variance": -2.597 },
    { "year": 1778, "month": 12, "variance": -1.612 },
    { "year": 1779, "month": 1, "variance": -1.457 },
    { "year": 1779, "month": 2, "variance": 1.086 },
    { "year": 1779, "month": 3, "variance": 0.678 },
    { "year": 1779, "month": 4, "variance": 1.014 },
    { "year": 1779, "month": 5, "variance": 2.468 },
    { "year": 1779, "month": 6, "variance": -1.502 },
    { "year": 1779, "month": 7, "variance": -1.236 },
    { "year": 1779, "month": 8, "variance": -0.315 },
    { "year": 1779, "month": 9, "variance": 0.324 },
    { "year": 1779, "month": 10, "variance": -0.383 },
    { "year": 1779, "month": 11, "variance": -0.380 },
    { "year": 1779, "month": 12, "variance": -1.195 },
    { "year": 1780, "month": 1, "variance": -0.198 },
    { "year": 1780, "month": 2, "variance": 0.528 },
    { "year": 1780, "month": 3, "variance": 0.002 },
    { "year": 1780, "month": 4, "variance": 5.228 },
    { "year": 1780, "month": 5, "variance": 4.325 },
    { "year": 1780, "month": 6, "variance": 0.853 },
    { "year": 1780, "month": 7, "variance": 1.515 },
    { "year": 1780, "month": 8, "variance": -0.953 },
    { "year": 1780, "month": 9, "variance": -3.162 },
    { "year": 1780, "month": 10, "variance": 0.134 },
    { "year": 1780, "month": 11, "variance": 0.794 },
    { "year": 1780, "month": 12, "variance": -0.805 },
    { "year": 1781, "month": 1, "variance": 0.001 },
    { "year": 1781, "month": 2, "variance": -1.052 },
    { "year": 1781, "month": 3, "variance": -0.524 },
    { "year": 1781, "month": 4, "variance": -1.471 },
    { "year": 1781, "month": 5, "variance": -0.154 },
    { "year": 1781, "month": 6, "variance": -1.738 },
    { "year": 1781, "month": 7, "variance": -0.116 },
    { "year": 1781, "month": 8, "variance": 0.221 },
    { "year": 1781, "month": 9, "variance": -1.752 },
    { "year": 1781, "month": 10, "variance": -0.627 },
    { "year": 1781, "month": 11, "variance": 1.683 },
    { "year": 1781, "month": 12, "variance": -0.116 },
    { "year": 1782, "month": 1, "variance": -2.017 },
    { "year": 1782, "month": 2, "variance": -2.608 },
    { "year": 1782, "month": 3, "variance": -2.482 },
    { "year": 1782, "month": 4, "variance": 0.317 },
    { "year": 1782, "month": 5, "variance": -0.381 },
    { "year": 1782, "month": 6, "variance": 0.312 },
    { "year": 1782, "month": 7, "variance": -0.431 },
    { "year": 1782, "month": 8, "variance": 1.712 },
    { "year": 1782, "month": 9, "variance": 0.225 },
    { "year": 1782, "month": 10, "variance": -0.158 },
    { "year": 1782, "month": 11, "variance": -0.773 },
    { "year": 1782, "month": 12, "variance": -2.092 },
    { "year": 1783, "month": 1, "variance": -3.931 },
    { "year": 1783, "month": 2, "variance": 2.175 },
    { "year": 1783, "month": 3, "variance": -0.518 },
    { "year": 1783, "month": 4, "variance": 0.248 },
    { "year": 1783, "month": 5, "variance": 0.933 },
    { "year": 1783, "month": 6, "variance": 1.079 },
    { "year": 1783, "month": 7, "variance": -1.293 },
    { "year": 1783, "month": 8, "variance": 0.096 },
    { "year": 1783, "month": 9, "variance": -2.013 },
    { "year": 1783, "month": 10, "variance": -1.768 },
    { "year": 1783, "month": 11, "variance": -3.749 },
    { "year": 1783, "month": 12, "variance": -1.309 },
    { "year": 1784, "month": 1, "variance": 0.346 },
    { "year": 1784, "month": 2, "variance": -2.024 },
    { "year": 1784, "month": 3, "variance": -1.245 },
    { "year": 1784, "month": 4, "variance": -0.212 },
    { "year": 1784, "month": 5, "variance": -1.418 },
    { "year": 1784, "month": 6, "variance": -0.758 },
    { "year": 1784, "month": 7, "variance": 0.581 },
    { "year": 1784, "month": 8, "variance": 1.399 },
    { "year": 1784, "month": 9, "variance": -1.832 },
    { "year": 1784, "month": 10, "variance": -2.333 },
    { "year": 1784, "month": 11, "variance": -1.457 },
    { "year": 1784, "month": 12, "variance": -0.007 },
    { "year": 1785, "month": 1, "variance": -1.618 },
    { "year": 1785, "month": 2, "variance": -2.031 },
    { "year": 1785, "month": 3, "variance": -3.298 },
    { "year": 1785, "month": 4, "variance": -2.012 },
    { "year": 1785, "month": 5, "variance": -1.466 },
    { "year": 1785, "month": 6, "variance": 0.261 },
    { "year": 1785, "month": 7, "variance": 0.143 },
    { "year": 1785, "month": 8, "variance": 0.630 },
    { "year": 1785, "month": 9, "variance": -1.579 },
    { "year": 1785, "month": 10, "variance": -1.851 },
    { "year": 1785, "month": 11, "variance": -0.413 },
    { "year": 1785, "month": 12, "variance": -1.639 },
    { "year": 1786, "month": 1, "variance": -1.701 },
    { "year": 1786, "month": 2, "variance": -0.425 },
    { "year": 1786, "month": 3, "variance": 0.104 },
    { "year": 1786, "month": 4, "variance": 0.993 },
    { "year": 1786, "month": 5, "variance": 0.210 },
    { "year": 1786, "month": 6, "variance": -0.406 },
    { "year": 1786, "month": 7, "variance": 0.979 },
    { "year": 1786, "month": 8, "variance": 0.674 },
    { "year": 1786, "month": 9, "variance": 0.359 },
    { "year": 1786, "month": 10, "variance": -1.409 },
    { "year": 1786, "month": 11, "variance": -0.223 },
    { "year": 1786, "month": 12, "variance": -2.728 },
    { "year": 1787, "month": 1, "variance": 0.369 },
    { "year": 1787, "month": 2, "variance": -0.510 },
    { "year": 1787, "month": 3, "variance": -0.518 },
    { "year": 1787, "month": 4, "variance": -0.553 },
    { "year": 1787, "month": 5, "variance": 0.030 },
    { "year": 1787, "month": 6, "variance": 0.827 },
    { "year": 1787, "month": 7, "variance": -0.996 },
    { "year": 1787, "month": 8, "variance": -0.358 },
    { "year": 1787, "month": 9, "variance": -1.690 },
    { "year": 1787, "month": 10, "variance": -1.400 },
    { "year": 1787, "month": 11, "variance": -0.173 },
    { "year": 1787, "month": 12, "variance": -1.684 },
    { "year": 1788, "month": 1, "variance": -1.777 },
    { "year": 1788, "month": 2, "variance": 0.557 },
    { "year": 1788, "month": 3, "variance": 0.013 },
    { "year": 1788, "month": 4, "variance": 0.271 },
    { "year": 1788, "month": 5, "variance": -1.011 },
    { "year": 1788, "month": 6, "variance": 0.289 },
    { "year": 1788, "month": 7, "variance": 2.156 },
    { "year": 1788, "month": 8, "variance": 0.016 },
    { "year": 1788, "month": 9, "variance": -0.343 },
    { "year": 1788, "month": 10, "variance": 0.168 },
    { "year": 1788, "month": 11, "variance": 0.070 },
    { "year": 1788, "month": 12, "variance": -2.040 },
    { "year": 1789, "month": 1, "variance": 1.328 },
    { "year": 1789, "month": 2, "variance": -1.413 },
    { "year": 1789, "month": 3, "variance": -1.405 },
    { "year": 1789, "month": 4, "variance": -0.636 },
    { "year": 1789, "month": 5, "variance": 0.289 },
    { "year": 1789, "month": 6, "variance": -0.005 },
    { "year": 1789, "month": 7, "variance": 1.127 },
    { "year": 1789, "month": 8, "variance": -0.040 },
    { "year": 1789, "month": 9, "variance": -0.034 },
    { "year": 1789, "month": 10, "variance": -1.790 },
    { "year": 1789, "month": 11, "variance": -0.015 },
    { "year": 1789, "month": 12, "variance": -0.358 },
    { "year": 1790, "month": 1, "variance": -0.062 },
    { "year": 1790, "month": 2, "variance": -0.152 },
    { "year": 1790, "month": 3, "variance": -0.734 },
    { "year": 1790, "month": 4, "variance": -2.314 },
    { "year": 1790, "month": 5, "variance": -1.040 },
    { "year": 1790, "month": 6, "variance": 0.269 },
    { "year": 1790, "month": 7, "variance": -0.604 },
    { "year": 1790, "month": 8, "variance": 0.102 },
    { "year": 1790, "month": 9, "variance": -0.814 },
    { "year": 1790, "month": 10, "variance": -0.595 },
    { "year": 1790, "month": 11, "variance": -0.676 },
    { "year": 1790, "month": 12, "variance": -0.756 },
    { "year": 1791, "month": 1, "variance": -1.137 },
    { "year": 1791, "month": 2, "variance": 0.414 },
    { "year": 1791, "month": 3, "variance": -0.532 },
    { "year": 1791, "month": 4, "variance": 0.705 },
    { "year": 1791, "month": 5, "variance": -1.516 },
    { "year": 1791, "month": 6, "variance": -0.236 },
    { "year": 1791, "month": 7, "variance": -0.743 },
    { "year": 1791, "month": 8, "variance": -0.099 },
    { "year": 1791, "month": 9, "variance": -0.368 },
    { "year": 1791, "month": 10, "variance": -1.159 },
    { "year": 1791, "month": 11, "variance": 0.092 },
    { "year": 1791, "month": 12, "variance": 0.050 },
    { "year": 1792, "month": 1, "variance": -2.252 },
    { "year": 1792, "month": 2, "variance": 0.502 },
    { "year": 1792, "month": 3, "variance": -0.941 },
    { "year": 1792, "month": 4, "variance": -0.447 },
    { "year": 1792, "month": 5, "variance": -0.045 },
    { "year": 1792, "month": 6, "variance": 0.103 },
    { "year": 1792, "month": 7, "variance": -0.193 },
    { "year": 1792, "month": 8, "variance": -1.615 },
    { "year": 1792, "month": 9, "variance": 0.759 },
    { "year": 1792, "month": 10, "variance": -1.168 },
    { "year": 1792, "month": 11, "variance": -0.852 },
    { "year": 1792, "month": 12, "variance": -0.274 },
    { "year": 1793, "month": 1, "variance": -1.909 },
    { "year": 1793, "month": 2, "variance": 1.685 },
    { "year": 1793, "month": 3, "variance": -0.287 },
    { "year": 1793, "month": 4, "variance": 0.259 },
    { "year": 1793, "month": 5, "variance": -0.357 },
    { "year": 1793, "month": 6, "variance": -0.341 },
    { "year": 1793, "month": 7, "variance": -0.050 },
    { "year": 1793, "month": 8, "variance": -0.660 },
    { "year": 1793, "month": 9, "variance": 0.101 },
    { "year": 1793, "month": 10, "variance": -0.849 },
    { "year": 1793, "month": 11, "variance": -0.582 },
    { "year": 1793, "month": 12, "variance": -1.669 },
    { "year": 1794, "month": 1, "variance": 0.986 },
    { "year": 1794, "month": 2, "variance": 0.416 },
    { "year": 1794, "month": 3, "variance": 0.295 },
    { "year": 1794, "month": 4, "variance": 0.932 },
    { "year": 1794, "month": 5, "variance": 1.007 },
    { "year": 1794, "month": 6, "variance": -1.597 },
    { "year": 1794, "month": 7, "variance": -1.539 },
    { "year": 1794, "month": 8, "variance": -0.341 },
    { "year": 1794, "month": 9, "variance": -0.112 },
    { "year": 1794, "month": 10, "variance": -0.169 },
    { "year": 1794, "month": 11, "variance": -0.931 },
    { "year": 1794, "month": 12, "variance": -0.735 },
    { "year": 1795, "month": 1, "variance": 0.342 },
    { "year": 1795, "month": 2, "variance": 1.383 },
    { "year": 1795, "month": 3, "variance": 0.425 },
    { "year": 1795, "month": 4, "variance": 0.472 },
    { "year": 1795, "month": 5, "variance": -0.322 },
    { "year": 1795, "month": 6, "variance": -0.192 },
    { "year": 1795, "month": 7, "variance": -0.044 },
    { "year": 1795, "month": 8, "variance": -0.608 },
    { "year": 1795, "month": 9, "variance": -0.814 },
    { "year": 1795, "month": 10, "variance": -1.412 },
    { "year": 1795, "month": 11, "variance": -0.931 },
    { "year": 1795, "month": 12, "variance": -1.012 },
    { "year": 1796, "month": 1, "variance": 0.396 },
    { "year": 1796, "month": 2, "variance": -0.354 },
    { "year": 1796, "month": 3, "variance": -1.786 },
    { "year": 1796, "month": 4, "variance": -0.572 },
    { "year": 1796, "month": 5, "variance": 0.006 },
    { "year": 1796, "month": 6, "variance": 0.739 },
    { "year": 1796, "month": 7, "variance": -0.012 },
    { "year": 1796, "month": 8, "variance": 0.995 },
    { "year": 1796, "month": 9, "variance": 0.074 },
    { "year": 1796, "month": 10, "variance": -0.309 },
    { "year": 1796, "month": 11, "variance": -0.463 },
    { "year": 1796, "month": 12, "variance": -2.333 },
    { "year": 1797, "month": 1, "variance": 1.873 },
    { "year": 1797, "month": 2, "variance": 1.764 },
    { "year": 1797, "month": 3, "variance": -1.297 },
    { "year": 1797, "month": 4, "variance": -1.767 },
    { "year": 1797, "month": 5, "variance": -0.934 },
    { "year": 1797, "month": 6, "variance": 0.384 },
    { "year": 1797, "month": 7, "variance": -0.189 },
    { "year": 1797, "month": 8, "variance": 0.313 },
    { "year": 1797, "month": 9, "variance": 0.546 },
    { "year": 1797, "month": 10, "variance": 0.033 },
    { "year": 1797, "month": 11, "variance": -1.372 },
    { "year": 1797, "month": 12, "variance": -0.346 },
    { "year": 1798, "month": 1, "variance": 0.152 },
    { "year": 1798, "month": 2, "variance": 0.089 },
    { "year": 1798, "month": 3, "variance": 1.737 },
    { "year": 1798, "month": 4, "variance": -0.256 },
    { "year": 1798, "month": 5, "variance": 0.501 },
    { "year": 1798, "month": 6, "variance": -0.181 },
    { "year": 1798, "month": 7, "variance": 0.713 },
    { "year": 1798, "month": 8, "variance": 1.046 },
    { "year": 1798, "month": 9, "variance": -0.281 },
    { "year": 1798, "month": 10, "variance": -0.526 },
    { "year": 1798, "month": 11, "variance": -0.086 },
    { "year": 1798, "month": 12, "variance": -1.598 },
    { "year": 1799, "month": 1, "variance": -0.458 },
    { "year": 1799, "month": 2, "variance": -0.901 },
    { "year": 1799, "month": 3, "variance": -1.269 },
    { "year": 1799, "month": 4, "variance": 0.408 },
    { "year": 1799, "month": 5, "variance": 0.045 },
    { "year": 1799, "month": 6, "variance": 0.216 },
    { "year": 1799, "month": 7, "variance": 0.555 },
    { "year": 1799, "month": 8, "variance": 0.289 },
    { "year": 1799, "month": 9, "variance": 0.365 },
    { "year": 1799, "month": 10, "variance": 0.358 },
    { "year": 1799, "month": 11, "variance": 0.142 },
    { "year": 1799, "month": 12, "variance": -0.083 },
    { "year": 1800, "month": 1, "variance": 0.407 },
    { "year": 1800, "month": 2, "variance": 0.599 },
    { "year": 1800, "month": 3, "variance": -0.685 },
    { "year": 1800, "month": 4, "variance": 0.629 },
    { "year": 1800, "month": 5, "variance": -0.239 },
    { "year": 1800, "month": 6, "variance": 0.125 },
    { "year": 1800, "month": 7, "variance": -0.575 },
    { "year": 1800, "month": 8, "variance": -0.132 },
    { "year": 1800, "month": 9, "variance": -1.141 },
    { "year": 1800, "month": 10, "variance": 0.264 },
    { "year": 1800, "month": 11, "variance": -0.635 },
    { "year": 1800, "month": 12, "variance": 0.192 },
    { "year": 1801, "month": 1, "variance": 0.179 },
    { "year": 1801, "month": 2, "variance": 0.087 },
    { "year": 1801, "month": 3, "variance": 1.205 },
    { "year": 1801, "month": 4, "variance": -0.898 },
    { "year": 1801, "month": 5, "variance": 0.872 },
    { "year": 1801, "month": 6, "variance": -0.952 },
    { "year": 1801, "month": 7, "variance": 0.345 },
    { "year": 1801, "month": 8, "variance": -0.600 },
    { "year": 1801, "month": 9, "variance": -0.479 },
    { "year": 1801, "month": 10, "variance": -0.144 },
    { "year": 1801, "month": 11, "variance": -0.499 },
    { "year": 1801, "month": 12, "variance": 0.829 },
    { "year": 1802, "month": 1, "variance": 1.149 },
    { "year": 1802, "month": 2, "variance": -0.244 },
    { "year": 1802, "month": 3, "variance": -0.027 },
    { "year": 1802, "month": 4, "variance": -0.696 },
    { "year": 1802, "month": 5, "variance": -0.699 },
    { "year": 1802, "month": 6, "variance": 1.024 },
    { "year": 1802, "month": 7, "variance": 0.284 },
    { "year": 1802, "month": 8, "variance": 0.278 },
    { "year": 1802, "month": 9, "variance": -0.167 },
    { "year": 1802, "month": 10, "variance": 0.448 },
    { "year": 1802, "month": 11, "variance": -0.717 },
    { "year": 1802, "month": 12, "variance": -0.723 },
    { "year": 1803, "month": 1, "variance": -2.024 },
    { "year": 1803, "month": 2, "variance": -1.719 },
    { "year": 1803, "month": 3, "variance": -0.338 },
    { "year": 1803, "month": 4, "variance": 0.874 },
    { "year": 1803, "month": 5, "variance": 0.570 },
    { "year": 1803, "month": 6, "variance": 0.352 },
    { "year": 1803, "month": 7, "variance": 0.807 },
    { "year": 1803, "month": 8, "variance": 1.587 },
    { "year": 1803, "month": 9, "variance": 0.358 },
    { "year": 1803, "month": 10, "variance": -0.351 },
    { "year": 1803, "month": 11, "variance": -0.394 },
    { "year": 1803, "month": 12, "variance": -1.508 },
    { "year": 1804, "month": 1, "variance": -0.118 },
    { "year": 1804, "month": 2, "variance": -1.185 },
    { "year": 1804, "month": 3, "variance": -0.930 },
    { "year": 1804, "month": 4, "variance": 1.639 },
    { "year": 1804, "month": 5, "variance": 0.799 },
    { "year": 1804, "month": 6, "variance": 0.369 },
    { "year": 1804, "month": 7, "variance": 1.471 },
    { "year": 1804, "month": 8, "variance": 0.792 },
    { "year": 1804, "month": 9, "variance": 0.516 },
    { "year": 1804, "month": 10, "variance": -0.018 },
    { "year": 1804, "month": 11, "variance": 0.841 },
    { "year": 1804, "month": 12, "variance": -1.435 },
    { "year": 1805, "month": 1, "variance": 0.208 },
    { "year": 1805, "month": 2, "variance": -0.570 },
    { "year": 1805, "month": 3, "variance": 0.423 },
    { "year": 1805, "month": 4, "variance": -0.255 },
    { "year": 1805, "month": 5, "variance": -0.236 },
    { "year": 1805, "month": 6, "variance": 0.599 },
    { "year": 1805, "month": 7, "variance": 0.394 },
    { "year": 1805, "month": 8, "variance": 1.454 },
    { "year": 1805, "month": 9, "variance": 0.034 },
    { "year": 1805, "month": 10, "variance": -1.537 },
    { "year": 1805, "month": 11, "variance": -1.693 },
    { "year": 1805, "month": 12, "variance": 0.467 },
    { "year": 1806, "month": 1, "variance": 0.247 },
    { "year": 1806, "month": 2, "variance": -0.394 },
    { "year": 1806, "month": 3, "variance": -0.677 },
    { "year": 1806, "month": 4, "variance": -0.446 },
    { "year": 1806, "month": 5, "variance": 0.139 },
    { "year": 1806, "month": 6, "variance": -1.074 },
    { "year": 1806, "month": 7, "variance": -0.410 },
    { "year": 1806, "month": 8, "variance": 0.735 },
    { "year": 1806, "month": 9, "variance": 0.513 },
    { "year": 1806, "month": 10, "variance": -0.878 },
    { "year": 1806, "month": 11, "variance": -1.023 },
    { "year": 1806, "month": 12, "variance": 0.257 },
    { "year": 1807, "month": 1, "variance": -1.510 },
    { "year": 1807, "month": 2, "variance": 0.904 },
    { "year": 1807, "month": 3, "variance": -0.524 },
    { "year": 1807, "month": 4, "variance": -1.444 },
    { "year": 1807, "month": 5, "variance": -1.962 },
    { "year": 1807, "month": 6, "variance": -0.200 },
    { "year": 1807, "month": 7, "variance": -0.193 },
    { "year": 1807, "month": 8, "variance": -0.071 },
    { "year": 1807, "month": 9, "variance": 0.541 },
    { "year": 1807, "month": 10, "variance": -0.431 },
    { "year": 1807, "month": 11, "variance": -0.246 },
    { "year": 1807, "month": 12, "variance": 0.691 },
    { "year": 1808, "month": 1, "variance": -1.430 },
    { "year": 1808, "month": 2, "variance": -1.041 },
    { "year": 1808, "month": 3, "variance": -1.040 },
    { "year": 1808, "month": 4, "variance": -0.978 },
    { "year": 1808, "month": 5, "variance": -2.043 },
    { "year": 1808, "month": 6, "variance": -0.182 },
    { "year": 1808, "month": 7, "variance": 0.097 },
    { "year": 1808, "month": 8, "variance": -0.768 },
    { "year": 1808, "month": 9, "variance": 0.726 },
    { "year": 1808, "month": 10, "variance": -1.402 },
    { "year": 1808, "month": 11, "variance": -1.840 },
    { "year": 1808, "month": 12, "variance": -2.843 },
    { "year": 1809, "month": 1, "variance": -2.324 },
    { "year": 1809, "month": 2, "variance": -2.283 },
    { "year": 1809, "month": 3, "variance": -1.949 },
    { "year": 1809, "month": 4, "variance": -0.519 },
    { "year": 1809, "month": 5, "variance": -2.022 },
    { "year": 1809, "month": 6, "variance": -0.462 },
    { "year": 1809, "month": 7, "variance": -1.685 },
    { "year": 1809, "month": 8, "variance": -0.924 },
    { "year": 1809, "month": 9, "variance": -1.060 },
    { "year": 1809, "month": 10, "variance": -0.599 },
    { "year": 1809, "month": 11, "variance": -3.131 },
    { "year": 1809, "month": 12, "variance": -1.777 },
    { "year": 1810, "month": 1, "variance": -1.550 },
    { "year": 1810, "month": 2, "variance": -0.625 },
    { "year": 1810, "month": 3, "variance": -0.391 },
    { "year": 1810, "month": 4, "variance": -1.818 },
    { "year": 1810, "month": 5, "variance": -2.220 },
    { "year": 1810, "month": 6, "variance": -1.503 },
    { "year": 1810, "month": 7, "variance": -1.768 },
    { "year": 1810, "month": 8, "variance": -1.755 },
    { "year": 1810, "month": 9, "variance": -2.886 },
    { "year": 1810, "month": 10, "variance": -2.618 },
    { "year": 1810, "month": 11, "variance": -2.300 },
    { "year": 1810, "month": 12, "variance": -1.019 },
    { "year": 1811, "month": 1, "variance": -1.305 },
    { "year": 1811, "month": 2, "variance": -2.629 },
    { "year": 1811, "month": 3, "variance": -2.125 },
    { "year": 1811, "month": 4, "variance": -2.036 },
    { "year": 1811, "month": 5, "variance": -1.850 },
    { "year": 1811, "month": 6, "variance": -1.348 },
    { "year": 1811, "month": 7, "variance": -2.407 },
    { "year": 1811, "month": 8, "variance": -0.483 },
    { "year": 1811, "month": 9, "variance": -1.675 },
    { "year": 1811, "month": 10, "variance": -2.723 },
    { "year": 1811, "month": 11, "variance": -2.595 },
    { "year": 1811, "month": 12, "variance": -0.409 },
    { "year": 1812, "month": 1, "variance": -1.513 },
    { "year": 1812, "month": 2, "variance": -3.022 },
    { "year": 1812, "month": 3, "variance": -3.282 },
    { "year": 1812, "month": 4, "variance": -1.432 },
    { "year": 1812, "month": 5, "variance": -1.848 },
    { "year": 1812, "month": 6, "variance": -1.531 },
    { "year": 1812, "month": 7, "variance": -0.033 },
    { "year": 1812, "month": 8, "variance": 1.206 },
    { "year": 1812, "month": 9, "variance": -1.886 },
    { "year": 1812, "month": 10, "variance": -1.631 },
    { "year": 1812, "month": 11, "variance": -1.686 },
    { "year": 1812, "month": 12, "variance": -2.423 },
    { "year": 1813, "month": 1, "variance": -4.085 },
    { "year": 1813, "month": 2, "variance": -0.951 },
    { "year": 1813, "month": 3, "variance": -3.764 },
    { "year": 1813, "month": 4, "variance": -0.232 },
    { "year": 1813, "month": 5, "variance": -0.002 },
    { "year": 1813, "month": 6, "variance": -0.302 },
    { "year": 1813, "month": 7, "variance": 0.060 },
    { "year": 1813, "month": 8, "variance": -0.788 },
    { "year": 1813, "month": 9, "variance": 0.272 },
    { "year": 1813, "month": 10, "variance": -0.570 },
    { "year": 1813, "month": 11, "variance": 0.685 },
    { "year": 1813, "month": 12, "variance": -1.491 },
    { "year": 1814, "month": 1, "variance": -1.059 },
    { "year": 1814, "month": 2, "variance": -1.529 },
    { "year": 1814, "month": 3, "variance": -2.687 },
    { "year": 1814, "month": 4, "variance": -1.215 },
    { "year": 1814, "month": 5, "variance": -1.954 },
    { "year": 1814, "month": 6, "variance": -0.734 },
    { "year": 1814, "month": 7, "variance": -1.878 },
    { "year": 1814, "month": 8, "variance": -1.197 },
    { "year": 1814, "month": 9, "variance": -1.394 },
    { "year": 1814, "month": 10, "variance": -1.913 },
    { "year": 1814, "month": 11, "variance": 0.602 },
    { "year": 1814, "month": 12, "variance": 2.232 },
    { "year": 1815, "month": 1, "variance": -0.515 },
    { "year": 1815, "month": 2, "variance": -0.945 },
    { "year": 1815, "month": 3, "variance": -1.723 },
    { "year": 1815, "month": 4, "variance": -1.814 },
    { "year": 1815, "month": 5, "variance": -1.607 },
    { "year": 1815, "month": 6, "variance": -2.405 },
    { "year": 1815, "month": 7, "variance": -0.006 },
    { "year": 1815, "month": 8, "variance": -0.667 },
    { "year": 1815, "month": 9, "variance": -0.922 },
    { "year": 1815, "month": 10, "variance": -2.059 },
    { "year": 1815, "month": 11, "variance": -1.985 },
    { "year": 1815, "month": 12, "variance": -2.463 },
    { "year": 1816, "month": 1, "variance": 0.197 },
    { "year": 1816, "month": 2, "variance": -2.509 },
    { "year": 1816, "month": 3, "variance": -1.455 },
    { "year": 1816, "month": 4, "variance": -0.820 },
    { "year": 1816, "month": 5, "variance": -0.814 },
    { "year": 1816, "month": 6, "variance": -1.774 },
    { "year": 1816, "month": 7, "variance": -2.154 },
    { "year": 1816, "month": 8, "variance": -1.326 },
    { "year": 1816, "month": 9, "variance": -1.676 },
    { "year": 1816, "month": 10, "variance": -3.418 },
    { "year": 1816, "month": 11, "variance": -2.011 },
    { "year": 1816, "month": 12, "variance": -2.646 },
    { "year": 1817, "month": 1, "variance": -1.015 },
    { "year": 1817, "month": 2, "variance": 0.451 },
    { "year": 1817, "month": 3, "variance": -0.808 },
    { "year": 1817, "month": 4, "variance": -0.566 },
    { "year": 1817, "month": 5, "variance": -1.952 },
    { "year": 1817, "month": 6, "variance": -2.315 },
    { "year": 1817, "month": 7, "variance": -2.352 },
    { "year": 1817, "month": 8, "variance": -0.479 },
    { "year": 1817, "month": 9, "variance": -3.250 },
    { "year": 1817, "month": 10, "variance": -3.031 },
    { "year": 1817, "month": 11, "variance": -1.459 },
    { "year": 1817, "month": 12, "variance": -3.406 },
    { "year": 1818, "month": 1, "variance": -1.408 },
    { "year": 1818, "month": 2, "variance": -2.476 },
    { "year": 1818, "month": 3, "variance": 0.184 },
    { "year": 1818, "month": 4, "variance": 1.431 },
    { "year": 1818, "month": 5, "variance": -0.268 },
    { "year": 1818, "month": 6, "variance": 0.192 },
    { "year": 1818, "month": 7, "variance": -0.975 },
    { "year": 1818, "month": 8, "variance": -0.760 },
    { "year": 1818, "month": 9, "variance": -1.483 },
    { "year": 1818, "month": 10, "variance": -2.552 },
    { "year": 1818, "month": 11, "variance": -1.054 },
    { "year": 1818, "month": 12, "variance": -1.148 },
    { "year": 1819, "month": 1, "variance": -1.610 },
    { "year": 1819, "month": 2, "variance": -1.029 },
    { "year": 1819, "month": 3, "variance": -2.448 },
    { "year": 1819, "month": 4, "variance": -1.375 },
    { "year": 1819, "month": 5, "variance": -1.560 },
    { "year": 1819, "month": 6, "variance": -1.064 },
    { "year": 1819, "month": 7, "variance": -1.467 },
    { "year": 1819, "month": 8, "variance": -1.619 },
    { "year": 1819, "month": 9, "variance": -1.221 },
    { "year": 1819, "month": 10, "variance": 0.069 },
    { "year": 1819, "month": 11, "variance": -0.902 },
    { "year": 1819, "month": 12, "variance": -1.824 },
    { "year": 1820, "month": 1, "variance": -1.401 },
    { "year": 1820, "month": 2, "variance": -1.058 },
    { "year": 1820, "month": 3, "variance": -0.769 },
    { "year": 1820, "month": 4, "variance": 0.306 },
    { "year": 1820, "month": 5, "variance": 0.189 },
    { "year": 1820, "month": 6, "variance": -0.299 },
    { "year": 1820, "month": 7, "variance": -1.171 },
    { "year": 1820, "month": 8, "variance": -2.050 },
    { "year": 1820, "month": 9, "variance": -1.017 },
    { "year": 1820, "month": 10, "variance": -1.284 },
    { "year": 1820, "month": 11, "variance": -1.655 },
    { "year": 1820, "month": 12, "variance": -2.345 },
    { "year": 1821, "month": 1, "variance": 0.396 },
    { "year": 1821, "month": 2, "variance": 0.450 },
    { "year": 1821, "month": 3, "variance": 0.013 },
    { "year": 1821, "month": 4, "variance": -0.740 },
    { "year": 1821, "month": 5, "variance": -0.200 },
    { "year": 1821, "month": 6, "variance": -1.030 },
    { "year": 1821, "month": 7, "variance": -1.521 },
    { "year": 1821, "month": 8, "variance": -0.932 },
    { "year": 1821, "month": 9, "variance": -2.023 },
    { "year": 1821, "month": 10, "variance": -0.765 },
    { "year": 1821, "month": 11, "variance": -0.528 },
    { "year": 1821, "month": 12, "variance": -0.918 },
    { "year": 1822, "month": 1, "variance": 0.186 },
    { "year": 1822, "month": 2, "variance": 1.206 },
    { "year": 1822, "month": 3, "variance": 2.333 },
    { "year": 1822, "month": 4, "variance": -0.236 },
    { "year": 1822, "month": 5, "variance": -0.991 },
    { "year": 1822, "month": 6, "variance": -1.008 },
    { "year": 1822, "month": 7, "variance": -0.354 },
    { "year": 1822, "month": 8, "variance": -0.825 },
    { "year": 1822, "month": 9, "variance": -1.488 },
    { "year": 1822, "month": 10, "variance": -1.539 },
    { "year": 1822, "month": 11, "variance": -1.615 },
    { "year": 1822, "month": 12, "variance": -2.670 },
    { "year": 1823, "month": 1, "variance": -0.809 },
    { "year": 1823, "month": 2, "variance": -1.296 },
    { "year": 1823, "month": 3, "variance": -0.374 },
    { "year": 1823, "month": 4, "variance": -0.801 },
    { "year": 1823, "month": 5, "variance": -0.888 },
    { "year": 1823, "month": 6, "variance": 0.298 },
    { "year": 1823, "month": 7, "variance": -0.331 },
    { "year": 1823, "month": 8, "variance": -0.884 },
    { "year": 1823, "month": 9, "variance": -1.948 },
    { "year": 1823, "month": 10, "variance": -1.647 },
    { "year": 1823, "month": 11, "variance": -1.596 },
    { "year": 1823, "month": 12, "variance": -1.665 },
    { "year": 1824, "month": 1, "variance": 0.068 },
    { "year": 1824, "month": 2, "variance": -0.587 },
    { "year": 1824, "month": 3, "variance": -0.081 },
    { "year": 1824, "month": 4, "variance": -0.079 },
    { "year": 1824, "month": 5, "variance": -0.317 },
    { "year": 1824, "month": 6, "variance": -0.196 },
    { "year": 1824, "month": 7, "variance": 0.294 },
    { "year": 1824, "month": 8, "variance": -0.597 },
    { "year": 1824, "month": 9, "variance": -0.625 },
    { "year": 1824, "month": 10, "variance": -1.097 },
    { "year": 1824, "month": 11, "variance": -0.243 },
    { "year": 1824, "month": 12, "variance": 1.449 },
    { "year": 1825, "month": 1, "variance": 0.618 },
    { "year": 1825, "month": 2, "variance": -0.175 },
    { "year": 1825, "month": 3, "variance": -0.075 },
    { "year": 1825, "month": 4, "variance": 0.525 },
    { "year": 1825, "month": 5, "variance": -0.703 },
    { "year": 1825, "month": 6, "variance": 0.126 },
    { "year": 1825, "month": 7, "variance": -0.522 },
    { "year": 1825, "month": 8, "variance": -0.758 },
    { "year": 1825, "month": 9, "variance": -1.031 },
    { "year": 1825, "month": 10, "variance": -1.267 },
    { "year": 1825, "month": 11, "variance": -0.004 },
    { "year": 1825, "month": 12, "variance": -0.510 },
    { "year": 1826, "month": 1, "variance": -0.581 },
    { "year": 1826, "month": 2, "variance": -1.642 },
    { "year": 1826, "month": 3, "variance": -0.477 },
    { "year": 1826, "month": 4, "variance": 0.005 },
    { "year": 1826, "month": 5, "variance": 0.409 },
    { "year": 1826, "month": 6, "variance": -0.625 },
    { "year": 1826, "month": 7, "variance": -0.106 },
    { "year": 1826, "month": 8, "variance": -0.961 },
    { "year": 1826, "month": 9, "variance": -0.986 },
    { "year": 1826, "month": 10, "variance": -0.783 },
    { "year": 1826, "month": 11, "variance": 0.619 },
    { "year": 1826, "month": 12, "variance": 1.352 },
    { "year": 1827, "month": 1, "variance": 1.104 },
    { "year": 1827, "month": 2, "variance": 1.228 },
    { "year": 1827, "month": 3, "variance": 0.786 },
    { "year": 1827, "month": 4, "variance": 1.039 },
    { "year": 1827, "month": 5, "variance": 0.394 },
    { "year": 1827, "month": 6, "variance": -0.071 },
    { "year": 1827, "month": 7, "variance": 0.121 },
    { "year": 1827, "month": 8, "variance": -0.365 },
    { "year": 1827, "month": 9, "variance": -1.296 },
    { "year": 1827, "month": 10, "variance": -0.731 },
    { "year": 1827, "month": 11, "variance": 0.182 },
    { "year": 1827, "month": 12, "variance": -0.832 },
    { "year": 1828, "month": 1, "variance": -1.923 },
    { "year": 1828, "month": 2, "variance": -1.328 },
    { "year": 1828, "month": 3, "variance": 0.414 },
    { "year": 1828, "month": 4, "variance": 0.336 },
    { "year": 1828, "month": 5, "variance": -0.200 },
    { "year": 1828, "month": 6, "variance": 0.456 },
    { "year": 1828, "month": 7, "variance": -0.177 },
    { "year": 1828, "month": 8, "variance": -0.454 },
    { "year": 1828, "month": 9, "variance": -2.191 },
    { "year": 1828, "month": 10, "variance": -0.703 },
    { "year": 1828, "month": 11, "variance": -0.153 },
    { "year": 1828, "month": 12, "variance": -0.689 },
    { "year": 1829, "month": 1, "variance": -0.588 },
    { "year": 1829, "month": 2, "variance": -1.568 },
    { "year": 1829, "month": 3, "variance": -0.353 },
    { "year": 1829, "month": 4, "variance": -0.647 },
    { "year": 1829, "month": 5, "variance": -0.154 },
    { "year": 1829, "month": 6, "variance": -0.813 },
    { "year": 1829, "month": 7, "variance": -0.355 },
    { "year": 1829, "month": 8, "variance": -0.682 },
    { "year": 1829, "month": 9, "variance": -1.662 },
    { "year": 1829, "month": 10, "variance": -0.564 },
    { "year": 1829, "month": 11, "variance": -1.116 },
    { "year": 1829, "month": 12, "variance": -1.135 },
    { "year": 1830, "month": 1, "variance": 0.337 },
    { "year": 1830, "month": 2, "variance": 0.771 },
    { "year": 1830, "month": 3, "variance": -1.040 },
    { "year": 1830, "month": 4, "variance": 0.320 },
    { "year": 1830, "month": 5, "variance": -1.296 },
    { "year": 1830, "month": 6, "variance": -0.841 },
    { "year": 1830, "month": 7, "variance": 0.399 },
    { "year": 1830, "month": 8, "variance": -0.690 },
    { "year": 1830, "month": 9, "variance": -1.743 },
    { "year": 1830, "month": 10, "variance": -1.358 },
    { "year": 1830, "month": 11, "variance": 1.350 },
    { "year": 1830, "month": 12, "variance": 0.849 },
    { "year": 1831, "month": 1, "variance": -0.453 },
    { "year": 1831, "month": 2, "variance": -0.831 },
    { "year": 1831, "month": 3, "variance": -0.933 },
    { "year": 1831, "month": 4, "variance": -0.789 },
    { "year": 1831, "month": 5, "variance": -0.546 },
    { "year": 1831, "month": 6, "variance": -0.521 },
    { "year": 1831, "month": 7, "variance": -0.978 },
    { "year": 1831, "month": 8, "variance": -1.578 },
    { "year": 1831, "month": 9, "variance": -2.324 },
    { "year": 1831, "month": 10, "variance": -1.575 },
    { "year": 1831, "month": 11, "variance": -1.729 },
    { "year": 1831, "month": 12, "variance": -1.366 },
    { "year": 1832, "month": 1, "variance": -0.962 },
    { "year": 1832, "month": 2, "variance": -1.616 },
    { "year": 1832, "month": 3, "variance": -0.849 },
    { "year": 1832, "month": 4, "variance": -0.527 },
    { "year": 1832, "month": 5, "variance": -1.236 },
    { "year": 1832, "month": 6, "variance": -0.897 },
    { "year": 1832, "month": 7, "variance": -0.834 },
    { "year": 1832, "month": 8, "variance": -2.247 },
    { "year": 1832, "month": 9, "variance": -1.943 },
    { "year": 1832, "month": 10, "variance": -0.890 },
    { "year": 1832, "month": 11, "variance": -1.948 },
    { "year": 1832, "month": 12, "variance": -2.953 },
    { "year": 1833, "month": 1, "variance": -0.710 },
    { "year": 1833, "month": 2, "variance": -0.577 },
    { "year": 1833, "month": 3, "variance": -1.012 },
    { "year": 1833, "month": 4, "variance": -0.636 },
    { "year": 1833, "month": 5, "variance": -0.971 },
    { "year": 1833, "month": 6, "variance": -0.712 },
    { "year": 1833, "month": 7, "variance": -0.864 },
    { "year": 1833, "month": 8, "variance": -0.948 },
    { "year": 1833, "month": 9, "variance": -1.076 },
    { "year": 1833, "month": 10, "variance": -1.554 },
    { "year": 1833, "month": 11, "variance": 0.430 },
    { "year": 1833, "month": 12, "variance": -1.015 },
    { "year": 1834, "month": 1, "variance": -2.335 },
    { "year": 1834, "month": 2, "variance": -1.041 },
    { "year": 1834, "month": 3, "variance": 0.170 },
    { "year": 1834, "month": 4, "variance": -0.496 },
    { "year": 1834, "month": 5, "variance": -0.344 },
    { "year": 1834, "month": 6, "variance": -0.937 },
    { "year": 1834, "month": 7, "variance": -0.413 },
    { "year": 1834, "month": 8, "variance": -0.764 },
    { "year": 1834, "month": 9, "variance": -0.819 },
    { "year": 1834, "month": 10, "variance": -0.765 },
    { "year": 1834, "month": 11, "variance": 0.256 },
    { "year": 1834, "month": 12, "variance": -0.573 },
    { "year": 1835, "month": 1, "variance": -0.165 },
    { "year": 1835, "month": 2, "variance": -0.452 },
    { "year": 1835, "month": 3, "variance": -1.034 },
    { "year": 1835, "month": 4, "variance": -0.772 },
    { "year": 1835, "month": 5, "variance": -1.401 },
    { "year": 1835, "month": 6, "variance": -1.685 },
    { "year": 1835, "month": 7, "variance": -1.570 },
    { "year": 1835, "month": 8, "variance": -1.877 },
    { "year": 1835, "month": 9, "variance": -2.454 },
    { "year": 1835, "month": 10, "variance": -1.596 },
    { "year": 1835, "month": 11, "variance": -1.815 },
    { "year": 1835, "month": 12, "variance": -2.495 },
    { "year": 1836, "month": 1, "variance": -1.044 },
    { "year": 1836, "month": 2, "variance": -1.050 },
    { "year": 1836, "month": 3, "variance": -0.151 },
    { "year": 1836, "month": 4, "variance": -1.240 },
    { "year": 1836, "month": 5, "variance": -1.331 },
    { "year": 1836, "month": 6, "variance": -1.123 },
    { "year": 1836, "month": 7, "variance": -1.002 },
    { "year": 1836, "month": 8, "variance": -1.740 },
    { "year": 1836, "month": 9, "variance": -1.577 },
    { "year": 1836, "month": 10, "variance": -0.652 },
    { "year": 1836, "month": 11, "variance": -2.323 },
    { "year": 1836, "month": 12, "variance": -0.828 },
    { "year": 1837, "month": 1, "variance": -0.784 },
    { "year": 1837, "month": 2, "variance": -0.789 },
    { "year": 1837, "month": 3, "variance": -1.679 },
    { "year": 1837, "month": 4, "variance": -2.330 },
    { "year": 1837, "month": 5, "variance": -1.610 },
    { "year": 1837, "month": 6, "variance": -1.589 },
    { "year": 1837, "month": 7, "variance": -1.064 },
    { "year": 1837, "month": 8, "variance": -1.118 },
    { "year": 1837, "month": 9, "variance": -1.536 },
    { "year": 1837, "month": 10, "variance": -1.767 },
    { "year": 1837, "month": 11, "variance": -1.989 },
    { "year": 1837, "month": 12, "variance": -1.427 },
    { "year": 1838, "month": 1, "variance": -3.280 },
    { "year": 1838, "month": 2, "variance": -1.888 },
    { "year": 1838, "month": 3, "variance": -1.791 },
    { "year": 1838, "month": 4, "variance": -1.193 },
    { "year": 1838, "month": 5, "variance": -1.635 },
    { "year": 1838, "month": 6, "variance": -0.983 },
    { "year": 1838, "month": 7, "variance": -0.287 },
    { "year": 1838, "month": 8, "variance": -0.569 },
    { "year": 1838, "month": 9, "variance": -1.256 },
    { "year": 1838, "month": 10, "variance": -0.871 },
    { "year": 1838, "month": 11, "variance": -0.993 },
    { "year": 1838, "month": 12, "variance": -1.090 },
    { "year": 1839, "month": 1, "variance": -0.579 },
    { "year": 1839, "month": 2, "variance": 0.052 },
    { "year": 1839, "month": 3, "variance": -2.948 },
    { "year": 1839, "month": 4, "variance": -0.739 },
    { "year": 1839, "month": 5, "variance": -1.340 },
    { "year": 1839, "month": 6, "variance": -1.191 },
    { "year": 1839, "month": 7, "variance": -0.253 },
    { "year": 1839, "month": 8, "variance": -0.085 },
    { "year": 1839, "month": 9, "variance": -1.497 },
    { "year": 1839, "month": 10, "variance": -1.213 },
    { "year": 1839, "month": 11, "variance": -2.305 },
    { "year": 1839, "month": 12, "variance": -2.639 },
    { "year": 1840, "month": 1, "variance": -0.154 },
    { "year": 1840, "month": 2, "variance": -1.242 },
    { "year": 1840, "month": 3, "variance": -1.456 },
    { "year": 1840, "month": 4, "variance": -0.600 },
    { "year": 1840, "month": 5, "variance": -0.388 },
    { "year": 1840, "month": 6, "variance": -0.324 },
    { "year": 1840, "month": 7, "variance": 0.078 },
    { "year": 1840, "month": 8, "variance": -1.027 },
    { "year": 1840, "month": 9, "variance": -1.311 },
    { "year": 1840, "month": 10, "variance": -1.911 },
    { "year": 1840, "month": 11, "variance": -2.095 },
    { "year": 1840, "month": 12, "variance": -1.753 },
    { "year": 1841, "month": 1, "variance": -2.020 },
    { "year": 1841, "month": 2, "variance": -0.853 },
    { "year": 1841, "month": 3, "variance": -2.130 },
    { "year": 1841, "month": 4, "variance": -1.762 },
    { "year": 1841, "month": 5, "variance": -0.777 },
    { "year": 1841, "month": 6, "variance": -0.686 },
    { "year": 1841, "month": 7, "variance": -0.086 },
    { "year": 1841, "month": 8, "variance": -0.416 },
    { "year": 1841, "month": 9, "variance": -1.365 },
    { "year": 1841, "month": 10, "variance": -0.619 },
    { "year": 1841, "month": 11, "variance": -1.440 },
    { "year": 1841, "month": 12, "variance": -1.118 },
    { "year": 1842, "month": 1, "variance": -0.992 },
    { "year": 1842, "month": 2, "variance": -0.397 },
    { "year": 1842, "month": 3, "variance": 0.264 },
    { "year": 1842, "month": 4, "variance": -0.211 },
    { "year": 1842, "month": 5, "variance": -1.027 },
    { "year": 1842, "month": 6, "variance": -1.118 },
    { "year": 1842, "month": 7, "variance": -1.000 },
    { "year": 1842, "month": 8, "variance": -0.879 },
    { "year": 1842, "month": 9, "variance": -1.308 },
    { "year": 1842, "month": 10, "variance": -1.061 },
    { "year": 1842, "month": 11, "variance": -1.347 },
    { "year": 1842, "month": 12, "variance": 0.062 },
    { "year": 1843, "month": 1, "variance": 0.370 },
    { "year": 1843, "month": 2, "variance": 0.604 },
    { "year": 1843, "month": 3, "variance": -0.672 },
    { "year": 1843, "month": 4, "variance": -0.637 },
    { "year": 1843, "month": 5, "variance": -1.477 },
    { "year": 1843, "month": 6, "variance": -1.176 },
    { "year": 1843, "month": 7, "variance": -0.581 },
    { "year": 1843, "month": 8, "variance": -0.781 },
    { "year": 1843, "month": 9, "variance": -0.911 },
    { "year": 1843, "month": 10, "variance": -0.646 },
    { "year": 1843, "month": 11, "variance": -1.237 },
    { "year": 1843, "month": 12, "variance": 0.109 },
    { "year": 1844, "month": 1, "variance": -0.721 },
    { "year": 1844, "month": 2, "variance": -1.280 },
    { "year": 1844, "month": 3, "variance": -0.666 },
    { "year": 1844, "month": 4, "variance": -1.079 },
    { "year": 1844, "month": 5, "variance": -1.404 },
    { "year": 1844, "month": 6, "variance": -0.860 },
    { "year": 1844, "month": 7, "variance": -0.686 },
    { "year": 1844, "month": 8, "variance": -1.022 },
    { "year": 1844, "month": 9, "variance": -1.421 },
    { "year": 1844, "month": 10, "variance": -0.659 },
    { "year": 1844, "month": 11, "variance": -1.768 },
    { "year": 1844, "month": 12, "variance": -1.764 },
    { "year": 1845, "month": 1, "variance": 0.065 },
    { "year": 1845, "month": 2, "variance": -1.619 },
    { "year": 1845, "month": 3, "variance": -0.759 },
    { "year": 1845, "month": 4, "variance": -0.297 },
    { "year": 1845, "month": 5, "variance": -1.055 },
    { "year": 1845, "month": 6, "variance": -0.830 },
    { "year": 1845, "month": 7, "variance": -0.269 },
    { "year": 1845, "month": 8, "variance": -0.506 },
    { "year": 1845, "month": 9, "variance": -0.975 },
    { "year": 1845, "month": 10, "variance": -1.564 },
    { "year": 1845, "month": 11, "variance": -0.967 },
    { "year": 1845, "month": 12, "variance": -1.956 },
    { "year": 1846, "month": 1, "variance": 0.573 },
    { "year": 1846, "month": 2, "variance": 0.145 },
    { "year": 1846, "month": 3, "variance": 0.920 },
    { "year": 1846, "month": 4, "variance": -0.989 },
    { "year": 1846, "month": 5, "variance": -0.595 },
    { "year": 1846, "month": 6, "variance": -0.158 },
    { "year": 1846, "month": 7, "variance": 0.357 },
    { "year": 1846, "month": 8, "variance": 0.092 },
    { "year": 1846, "month": 9, "variance": -0.446 },
    { "year": 1846, "month": 10, "variance": -1.115 },
    { "year": 1846, "month": 11, "variance": -1.131 },
    { "year": 1846, "month": 12, "variance": 0.163 },
    { "year": 1847, "month": 1, "variance": 0.119 },
    { "year": 1847, "month": 2, "variance": 0.352 },
    { "year": 1847, "month": 3, "variance": -1.333 },
    { "year": 1847, "month": 4, "variance": -0.450 },
    { "year": 1847, "month": 5, "variance": -0.851 },
    { "year": 1847, "month": 6, "variance": -0.837 },
    { "year": 1847, "month": 7, "variance": -0.288 },
    { "year": 1847, "month": 8, "variance": -0.610 },
    { "year": 1847, "month": 9, "variance": -0.558 },
    { "year": 1847, "month": 10, "variance": -0.709 },
    { "year": 1847, "month": 11, "variance": -0.579 },
    { "year": 1847, "month": 12, "variance": -1.936 },
    { "year": 1848, "month": 1, "variance": -2.126 },
    { "year": 1848, "month": 2, "variance": 0.489 },
    { "year": 1848, "month": 3, "variance": -0.600 },
    { "year": 1848, "month": 4, "variance": -0.332 },
    { "year": 1848, "month": 5, "variance": -0.895 },
    { "year": 1848, "month": 6, "variance": -0.428 },
    { "year": 1848, "month": 7, "variance": -0.074 },
    { "year": 1848, "month": 8, "variance": -0.753 },
    { "year": 1848, "month": 9, "variance": -1.196 },
    { "year": 1848, "month": 10, "variance": -0.672 },
    { "year": 1848, "month": 11, "variance": -0.857 },
    { "year": 1848, "month": 12, "variance": -1.554 },
    { "year": 1849, "month": 1, "variance": -0.635 },
    { "year": 1849, "month": 2, "variance": -0.598 },
    { "year": 1849, "month": 3, "variance": -0.070 },
    { "year": 1849, "month": 4, "variance": -1.404 },
    { "year": 1849, "month": 5, "variance": -1.319 },
    { "year": 1849, "month": 6, "variance": -0.665 },
    { "year": 1849, "month": 7, "variance": -0.080 },
    { "year": 1849, "month": 8, "variance": -0.411 },
    { "year": 1849, "month": 9, "variance": -1.103 },
    { "year": 1849, "month": 10, "variance": -0.434 },
    { "year": 1849, "month": 11, "variance": -0.388 },
    { "year": 1849, "month": 12, "variance": -1.726 },
    { "year": 1850, "month": 1, "variance": -1.886 },
    { "year": 1850, "month": 2, "variance": -0.194 },
    { "year": 1850, "month": 3, "variance": -0.432 },
    { "year": 1850, "month": 4, "variance": -1.219 },
    { "year": 1850, "month": 5, "variance": -1.475 },
    { "year": 1850, "month": 6, "variance": -0.513 },
    { "year": 1850, "month": 7, "variance": -0.040 },
    { "year": 1850, "month": 8, "variance": 0.017 },
    { "year": 1850, "month": 9, "variance": -0.691 },
    { "year": 1850, "month": 10, "variance": -1.240 },
    { "year": 1850, "month": 11, "variance": -1.434 },
    { "year": 1850, "month": 12, "variance": -0.864 },
    { "year": 1851, "month": 1, "variance": -0.220 },
    { "year": 1851, "month": 2, "variance": -0.762 },
    { "year": 1851, "month": 3, "variance": -1.220 },
    { "year": 1851, "month": 4, "variance": -1.165 },
    { "year": 1851, "month": 5, "variance": -0.372 },
    { "year": 1851, "month": 6, "variance": -0.260 },
    { "year": 1851, "month": 7, "variance": -0.027 },
    { "year": 1851, "month": 8, "variance": -0.305 },
    { "year": 1851, "month": 9, "variance": -0.566 },
    { "year": 1851, "month": 10, "variance": -0.229 },
    { "year": 1851, "month": 11, "variance": -1.212 },
    { "year": 1851, "month": 12, "variance": -0.551 },
    { "year": 1852, "month": 1, "variance": -0.289 },
    { "year": 1852, "month": 2, "variance": -0.763 },
    { "year": 1852, "month": 3, "variance": -1.538 },
    { "year": 1852, "month": 4, "variance": -0.956 },
    { "year": 1852, "month": 5, "variance": -0.319 },
    { "year": 1852, "month": 6, "variance": -0.527 },
    { "year": 1852, "month": 7, "variance": -0.060 },
    { "year": 1852, "month": 8, "variance": -0.754 },
    { "year": 1852, "month": 9, "variance": -0.755 },
    { "year": 1852, "month": 10, "variance": -0.429 },
    { "year": 1852, "month": 11, "variance": -1.565 },
    { "year": 1852, "month": 12, "variance": 0.102 },
    { "year": 1853, "month": 1, "variance": -0.856 },
    { "year": 1853, "month": 2, "variance": -1.058 },
    { "year": 1853, "month": 3, "variance": -1.312 },
    { "year": 1853, "month": 4, "variance": -0.913 },
    { "year": 1853, "month": 5, "variance": -0.523 },
    { "year": 1853, "month": 6, "variance": -0.277 },
    { "year": 1853, "month": 7, "variance": 0.084 },
    { "year": 1853, "month": 8, "variance": -0.102 },
    { "year": 1853, "month": 9, "variance": -0.513 },
    { "year": 1853, "month": 10, "variance": -0.810 },
    { "year": 1853, "month": 11, "variance": -1.380 },
    { "year": 1853, "month": 12, "variance": -0.820 },
    { "year": 1854, "month": 1, "variance": -1.374 },
    { "year": 1854, "month": 2, "variance": -1.353 },
    { "year": 1854, "month": 3, "variance": -0.713 },
    { "year": 1854, "month": 4, "variance": -0.813 },
    { "year": 1854, "month": 5, "variance": -0.404 },
    { "year": 1854, "month": 6, "variance": -0.862 },
    { "year": 1854, "month": 7, "variance": 0.088 },
    { "year": 1854, "month": 8, "variance": -0.171 },
    { "year": 1854, "month": 9, "variance": -0.711 },
    { "year": 1854, "month": 10, "variance": 0.422 },
    { "year": 1854, "month": 11, "variance": -0.420 },
    { "year": 1854, "month": 12, "variance": -0.223 },
    { "year": 1855, "month": 1, "variance": -0.153 },
    { "year": 1855, "month": 2, "variance": -0.279 },
    { "year": 1855, "month": 3, "variance": -0.780 },
    { "year": 1855, "month": 4, "variance": 0.151 },
    { "year": 1855, "month": 5, "variance": -0.272 },
    { "year": 1855, "month": 6, "variance": -0.660 },
    { "year": 1855, "month": 7, "variance": -0.613 },
    { "year": 1855, "month": 8, "variance": -0.483 },
    { "year": 1855, "month": 9, "variance": -1.066 },
    { "year": 1855, "month": 10, "variance": -0.878 },
    { "year": 1855, "month": 11, "variance": -0.968 },
    { "year": 1855, "month": 12, "variance": -1.421 },
    { "year": 1856, "month": 1, "variance": 0.132 },
    { "year": 1856, "month": 2, "variance": -1.019 },
    { "year": 1856, "month": 3, "variance": -1.010 },
    { "year": 1856, "month": 4, "variance": -0.670 },
    { "year": 1856, "month": 5, "variance": -0.911 },
    { "year": 1856, "month": 6, "variance": -0.106 },
    { "year": 1856, "month": 7, "variance": -0.434 },
    { "year": 1856, "month": 8, "variance": -0.973 },
    { "year": 1856, "month": 9, "variance": -1.240 },
    { "year": 1856, "month": 10, "variance": -1.210 },
    { "year": 1856, "month": 11, "variance": -0.751 },
    { "year": 1856, "month": 12, "variance": -0.234 },
    { "year": 1857, "month": 1, "variance": -0.760 },
    { "year": 1857, "month": 2, "variance": -0.735 },
    { "year": 1857, "month": 3, "variance": -1.074 },
    { "year": 1857, "month": 4, "variance": -1.599 },
    { "year": 1857, "month": 5, "variance": -1.548 },
    { "year": 1857, "month": 6, "variance": -0.964 },
    { "year": 1857, "month": 7, "variance": -0.526 },
    { "year": 1857, "month": 8, "variance": -0.769 },
    { "year": 1857, "month": 9, "variance": -1.119 },
    { "year": 1857, "month": 10, "variance": -1.135 },
    { "year": 1857, "month": 11, "variance": -0.865 },
    { "year": 1857, "month": 12, "variance": -0.109 },
    { "year": 1858, "month": 1, "variance": 0.096 },
    { "year": 1858, "month": 2, "variance": -0.959 },
    { "year": 1858, "month": 3, "variance": -0.545 },
    { "year": 1858, "month": 4, "variance": -0.143 },
    { "year": 1858, "month": 5, "variance": -0.561 },
    { "year": 1858, "month": 6, "variance": -0.591 },
    { "year": 1858, "month": 7, "variance": -0.757 },
    { "year": 1858, "month": 8, "variance": -0.740 },
    { "year": 1858, "month": 9, "variance": -1.056 },
    { "year": 1858, "month": 10, "variance": -0.473 },
    { "year": 1858, "month": 11, "variance": -0.109 },
    { "year": 1858, "month": 12, "variance": -1.190 },
    { "year": 1859, "month": 1, "variance": -0.589 },
    { "year": 1859, "month": 2, "variance": -0.610 },
    { "year": 1859, "month": 3, "variance": -0.330 },
    { "year": 1859, "month": 4, "variance": 0.135 },
    { "year": 1859, "month": 5, "variance": 0.041 },
    { "year": 1859, "month": 6, "variance": -0.412 },
    { "year": 1859, "month": 7, "variance": -0.617 },
    { "year": 1859, "month": 8, "variance": -0.743 },
    { "year": 1859, "month": 9, "variance": -1.081 },
    { "year": 1859, "month": 10, "variance": -0.451 },
    { "year": 1859, "month": 11, "variance": -0.181 },
    { "year": 1859, "month": 12, "variance": -0.295 },
    { "year": 1860, "month": 1, "variance": -0.588 },
    { "year": 1860, "month": 2, "variance": -0.634 },
    { "year": 1860, "month": 3, "variance": -1.924 },
    { "year": 1860, "month": 4, "variance": -0.660 },
    { "year": 1860, "month": 5, "variance": -0.334 },
    { "year": 1860, "month": 6, "variance": -0.289 },
    { "year": 1860, "month": 7, "variance": -0.230 },
    { "year": 1860, "month": 8, "variance": -0.156 },
    { "year": 1860, "month": 9, "variance": -0.237 },
    { "year": 1860, "month": 10, "variance": -0.569 },
    { "year": 1860, "month": 11, "variance": -1.100 },
    { "year": 1860, "month": 12, "variance": -2.054 },
    { "year": 1861, "month": 1, "variance": -2.232 },
    { "year": 1861, "month": 2, "variance": -1.127 },
    { "year": 1861, "month": 3, "variance": -0.878 },
    { "year": 1861, "month": 4, "variance": -0.916 },
    { "year": 1861, "month": 5, "variance": -0.904 },
    { "year": 1861, "month": 6, "variance": -0.544 },
    { "year": 1861, "month": 7, "variance": -0.478 },
    { "year": 1861, "month": 8, "variance": -0.294 },
    { "year": 1861, "month": 9, "variance": -0.739 },
    { "year": 1861, "month": 10, "variance": -0.808 },
    { "year": 1861, "month": 11, "variance": -0.411 },
    { "year": 1861, "month": 12, "variance": -0.825 },
    { "year": 1862, "month": 1, "variance": -1.959 },
    { "year": 1862, "month": 2, "variance": -1.457 },
    { "year": 1862, "month": 3, "variance": -0.968 },
    { "year": 1862, "month": 4, "variance": -1.163 },
    { "year": 1862, "month": 5, "variance": -0.670 },
    { "year": 1862, "month": 6, "variance": -0.696 },
    { "year": 1862, "month": 7, "variance": -0.489 },
    { "year": 1862, "month": 8, "variance": -0.738 },
    { "year": 1862, "month": 9, "variance": -1.114 },
    { "year": 1862, "month": 10, "variance": -0.981 },
    { "year": 1862, "month": 11, "variance": -1.343 },
    { "year": 1862, "month": 12, "variance": -2.010 },
    { "year": 1863, "month": 1, "variance": 0.409 },
    { "year": 1863, "month": 2, "variance": 0.038 },
    { "year": 1863, "month": 3, "variance": -0.686 },
    { "year": 1863, "month": 4, "variance": -0.459 },
    { "year": 1863, "month": 5, "variance": -0.407 },
    { "year": 1863, "month": 6, "variance": -0.780 },
    { "year": 1863, "month": 7, "variance": -0.678 },
    { "year": 1863, "month": 8, "variance": -0.672 },
    { "year": 1863, "month": 9, "variance": -0.932 },
    { "year": 1863, "month": 10, "variance": -1.055 },
    { "year": 1863, "month": 11, "variance": -0.741 },
    { "year": 1863, "month": 12, "variance": -0.992 },
    { "year": 1864, "month": 1, "variance": -1.112 },
    { "year": 1864, "month": 2, "variance": -0.776 },
    { "year": 1864, "month": 3, "variance": -0.757 },
    { "year": 1864, "month": 4, "variance": -0.883 },
    { "year": 1864, "month": 5, "variance": -0.439 },
    { "year": 1864, "month": 6, "variance": -0.190 },
    { "year": 1864, "month": 7, "variance": -0.268 },
    { "year": 1864, "month": 8, "variance": -0.502 },
    { "year": 1864, "month": 9, "variance": -0.758 },
    { "year": 1864, "month": 10, "variance": -0.481 },
    { "year": 1864, "month": 11, "variance": -0.888 },
    { "year": 1864, "month": 12, "variance": -1.407 },
    { "year": 1865, "month": 1, "variance": 0.326 },
    { "year": 1865, "month": 2, "variance": -1.117 },
    { "year": 1865, "month": 3, "variance": -1.348 },
    { "year": 1865, "month": 4, "variance": -1.083 },
    { "year": 1865, "month": 5, "variance": -0.478 },
    { "year": 1865, "month": 6, "variance": -0.328 },
    { "year": 1865, "month": 7, "variance": -0.213 },
    { "year": 1865, "month": 8, "variance": -0.353 },
    { "year": 1865, "month": 9, "variance": -0.345 },
    { "year": 1865, "month": 10, "variance": -0.152 },
    { "year": 1865, "month": 11, "variance": 0.007 },
    { "year": 1865, "month": 12, "variance": -1.035 },
    { "year": 1866, "month": 1, "variance": 0.258 },
    { "year": 1866, "month": 2, "variance": -1.022 },
    { "year": 1866, "month": 3, "variance": -0.982 },
    { "year": 1866, "month": 4, "variance": -0.509 },
    { "year": 1866, "month": 5, "variance": -0.525 },
    { "year": 1866, "month": 6, "variance": -0.754 },
    { "year": 1866, "month": 7, "variance": 0.131 },
    { "year": 1866, "month": 8, "variance": -0.437 },
    { "year": 1866, "month": 9, "variance": -0.629 },
    { "year": 1866, "month": 10, "variance": -0.803 },
    { "year": 1866, "month": 11, "variance": -0.248 },
    { "year": 1866, "month": 12, "variance": 0.472 },
    { "year": 1867, "month": 1, "variance": -0.196 },
    { "year": 1867, "month": 2, "variance": -0.635 },
    { "year": 1867, "month": 3, "variance": -0.927 },
    { "year": 1867, "month": 4, "variance": -0.147 },
    { "year": 1867, "month": 5, "variance": -0.922 },
    { "year": 1867, "month": 6, "variance": -0.285 },
    { "year": 1867, "month": 7, "variance": -0.239 },
    { "year": 1867, "month": 8, "variance": -0.449 },
    { "year": 1867, "month": 9, "variance": -0.388 },
    { "year": 1867, "month": 10, "variance": -0.095 },
    { "year": 1867, "month": 11, "variance": 0.812 },
    { "year": 1867, "month": 12, "variance": 0.220 },
    { "year": 1868, "month": 1, "variance": -0.849 },
    { "year": 1868, "month": 2, "variance": -1.507 },
    { "year": 1868, "month": 3, "variance": -0.943 },
    { "year": 1868, "month": 4, "variance": -0.250 },
    { "year": 1868, "month": 5, "variance": -0.135 },
    { "year": 1868, "month": 6, "variance": -0.464 },
    { "year": 1868, "month": 7, "variance": 0.027 },
    { "year": 1868, "month": 8, "variance": -0.251 },
    { "year": 1868, "month": 9, "variance": -0.540 },
    { "year": 1868, "month": 10, "variance": 0.109 },
    { "year": 1868, "month": 11, "variance": -1.012 },
    { "year": 1868, "month": 12, "variance": -0.428 },
    { "year": 1869, "month": 1, "variance": -0.542 },
    { "year": 1869, "month": 2, "variance": 0.453 },
    { "year": 1869, "month": 3, "variance": -1.269 },
    { "year": 1869, "month": 4, "variance": -0.465 },
    { "year": 1869, "month": 5, "variance": -0.179 },
    { "year": 1869, "month": 6, "variance": -0.063 },
    { "year": 1869, "month": 7, "variance": -0.141 },
    { "year": 1869, "month": 8, "variance": 0.027 },
    { "year": 1869, "month": 9, "variance": 0.092 },
    { "year": 1869, "month": 10, "variance": -0.288 },
    { "year": 1869, "month": 11, "variance": -0.392 },
    { "year": 1869, "month": 12, "variance": -1.010 },
    { "year": 1870, "month": 1, "variance": -0.617 },
    { "year": 1870, "month": 2, "variance": -1.169 },
    { "year": 1870, "month": 3, "variance": -0.764 },
    { "year": 1870, "month": 4, "variance": -0.544 },
    { "year": 1870, "month": 5, "variance": -0.146 },
    { "year": 1870, "month": 6, "variance": 0.074 },
    { "year": 1870, "month": 7, "variance": 0.120 },
    { "year": 1870, "month": 8, "variance": -0.484 },
    { "year": 1870, "month": 9, "variance": -0.187 },
    { "year": 1870, "month": 10, "variance": -0.493 },
    { "year": 1870, "month": 11, "variance": -0.542 },
    { "year": 1870, "month": 12, "variance": -1.463 },
    { "year": 1871, "month": 1, "variance": -1.244 },
    { "year": 1871, "month": 2, "variance": -1.573 },
    { "year": 1871, "month": 3, "variance": -0.661 },
    { "year": 1871, "month": 4, "variance": -0.078 },
    { "year": 1871, "month": 5, "variance": -0.624 },
    { "year": 1871, "month": 6, "variance": -0.508 },
    { "year": 1871, "month": 7, "variance": -0.176 },
    { "year": 1871, "month": 8, "variance": -0.031 },
    { "year": 1871, "month": 9, "variance": -0.451 },
    { "year": 1871, "month": 10, "variance": -0.241 },
    { "year": 1871, "month": 11, "variance": -1.095 },
    { "year": 1871, "month": 12, "variance": -0.563 },
    { "year": 1872, "month": 1, "variance": -1.039 },
    { "year": 1872, "month": 2, "variance": -0.951 },
    { "year": 1872, "month": 3, "variance": -0.515 },
    { "year": 1872, "month": 4, "variance": -0.592 },
    { "year": 1872, "month": 5, "variance": -0.234 },
    { "year": 1872, "month": 6, "variance": -0.543 },
    { "year": 1872, "month": 7, "variance": -0.202 },
    { "year": 1872, "month": 8, "variance": -0.161 },
    { "year": 1872, "month": 9, "variance": -0.220 },
    { "year": 1872, "month": 10, "variance": -0.101 },
    { "year": 1872, "month": 11, "variance": -0.831 },
    { "year": 1872, "month": 12, "variance": -1.091 },
    { "year": 1873, "month": 1, "variance": -0.688 },
    { "year": 1873, "month": 2, "variance": -0.147 },
    { "year": 1873, "month": 3, "variance": -0.755 },
    { "year": 1873, "month": 4, "variance": -0.926 },
    { "year": 1873, "month": 5, "variance": -0.402 },
    { "year": 1873, "month": 6, "variance": -0.163 },
    { "year": 1873, "month": 7, "variance": -0.179 },
    { "year": 1873, "month": 8, "variance": -0.207 },
    { "year": 1873, "month": 9, "variance": -0.684 },
    { "year": 1873, "month": 10, "variance": -0.071 },
    { "year": 1873, "month": 11, "variance": -0.381 },
    { "year": 1873, "month": 12, "variance": 0.102 },
    { "year": 1874, "month": 1, "variance": -0.041 },
    { "year": 1874, "month": 2, "variance": -0.254 },
    { "year": 1874, "month": 3, "variance": -1.232 },
    { "year": 1874, "month": 4, "variance": -0.204 },
    { "year": 1874, "month": 5, "variance": -0.116 },
    { "year": 1874, "month": 6, "variance": -0.266 },
    { "year": 1874, "month": 7, "variance": -0.335 },
    { "year": 1874, "month": 8, "variance": -0.117 },
    { "year": 1874, "month": 9, "variance": -0.001 },
    { "year": 1874, "month": 10, "variance": -0.189 },
    { "year": 1874, "month": 11, "variance": -0.396 },
    { "year": 1874, "month": 12, "variance": -0.273 },
    { "year": 1875, "month": 1, "variance": -1.147 },
    { "year": 1875, "month": 2, "variance": -1.035 },
    { "year": 1875, "month": 3, "variance": -1.132 },
    { "year": 1875, "month": 4, "variance": -0.761 },
    { "year": 1875, "month": 5, "variance": -0.630 },
    { "year": 1875, "month": 6, "variance": -0.391 },
    { "year": 1875, "month": 7, "variance": -0.285 },
    { "year": 1875, "month": 8, "variance": -0.523 },
    { "year": 1875, "month": 9, "variance": -0.801 },
    { "year": 1875, "month": 10, "variance": -0.692 },
    { "year": 1875, "month": 11, "variance": -1.548 },
    { "year": 1875, "month": 12, "variance": -0.992 },
    { "year": 1876, "month": 1, "variance": -0.816 },
    { "year": 1876, "month": 2, "variance": -0.648 },
    { "year": 1876, "month": 3, "variance": -0.631 },
    { "year": 1876, "month": 4, "variance": -0.175 },
    { "year": 1876, "month": 5, "variance": -0.687 },
    { "year": 1876, "month": 6, "variance": -0.414 },
    { "year": 1876, "month": 7, "variance": -0.105 },
    { "year": 1876, "month": 8, "variance": -0.425 },
    { "year": 1876, "month": 9, "variance": -0.437 },
    { "year": 1876, "month": 10, "variance": -0.327 },
    { "year": 1876, "month": 11, "variance": -1.009 },
    { "year": 1876, "month": 12, "variance": -1.464 },
    { "year": 1877, "month": 1, "variance": -0.317 },
    { "year": 1877, "month": 2, "variance": -0.318 },
    { "year": 1877, "month": 3, "variance": -0.064 },
    { "year": 1877, "month": 4, "variance": -0.346 },
    { "year": 1877, "month": 5, "variance": -0.346 },
    { "year": 1877, "month": 6, "variance": -0.175 },
    { "year": 1877, "month": 7, "variance": 0.225 },
    { "year": 1877, "month": 8, "variance": 0.234 },
    { "year": 1877, "month": 9, "variance": -0.032 },
    { "year": 1877, "month": 10, "variance": -0.024 },
    { "year": 1877, "month": 11, "variance": 0.193 },
    { "year": 1877, "month": 12, "variance": -0.660 },
    { "year": 1878, "month": 1, "variance": -0.639 },
    { "year": 1878, "month": 2, "variance": 0.454 },
    { "year": 1878, "month": 3, "variance": 1.240 },
    { "year": 1878, "month": 4, "variance": 0.534 },
    { "year": 1878, "month": 5, "variance": -0.358 },
    { "year": 1878, "month": 6, "variance": 0.262 },
    { "year": 1878, "month": 7, "variance": 0.420 },
    { "year": 1878, "month": 8, "variance": 0.209 },
    { "year": 1878, "month": 9, "variance": 0.073 },
    { "year": 1878, "month": 10, "variance": -0.035 },
    { "year": 1878, "month": 11, "variance": 0.268 },
    { "year": 1878, "month": 12, "variance": -0.324 },
    { "year": 1879, "month": 1, "variance": -0.331 },
    { "year": 1879, "month": 2, "variance": -0.521 },
    { "year": 1879, "month": 3, "variance": -0.454 },
    { "year": 1879, "month": 4, "variance": -0.628 },
    { "year": 1879, "month": 5, "variance": -0.606 },
    { "year": 1879, "month": 6, "variance": -0.336 },
    { "year": 1879, "month": 7, "variance": -0.160 },
    { "year": 1879, "month": 8, "variance": -0.675 },
    { "year": 1879, "month": 9, "variance": -0.665 },
    { "year": 1879, "month": 10, "variance": -0.119 },
    { "year": 1879, "month": 11, "variance": -0.613 },
    { "year": 1879, "month": 12, "variance": -1.092 },
    { "year": 1880, "month": 1, "variance": -0.875 },
    { "year": 1880, "month": 2, "variance": -1.195 },
    { "year": 1880, "month": 3, "variance": -0.749 },
    { "year": 1880, "month": 4, "variance": -0.887 },
    { "year": 1880, "month": 5, "variance": -0.293 },
    { "year": 1880, "month": 6, "variance": -0.316 },
    { "year": 1880, "month": 7, "variance": -0.276 },
    { "year": 1880, "month": 8, "variance": -0.134 },
    { "year": 1880, "month": 9, "variance": -0.742 },
    { "year": 1880, "month": 10, "variance": -0.599 },
    { "year": 1880, "month": 11, "variance": -0.259 },
    { "year": 1880, "month": 12, "variance": -0.507 },
    { "year": 1881, "month": 1, "variance": -0.151 },
    { "year": 1881, "month": 2, "variance": -0.612 },
    { "year": 1881, "month": 3, "variance": -0.343 },
    { "year": 1881, "month": 4, "variance": -0.020 },
    { "year": 1881, "month": 5, "variance": -0.190 },
    { "year": 1881, "month": 6, "variance": -0.828 },
    { "year": 1881, "month": 7, "variance": -0.170 },
    { "year": 1881, "month": 8, "variance": -0.203 },
    { "year": 1881, "month": 9, "variance": -0.448 },
    { "year": 1881, "month": 10, "variance": -0.428 },
    { "year": 1881, "month": 11, "variance": -0.855 },
    { "year": 1881, "month": 12, "variance": -0.484 },
    { "year": 1882, "month": 1, "variance": 0.375 },
    { "year": 1882, "month": 2, "variance": -0.011 },
    { "year": 1882, "month": 3, "variance": -0.316 },
    { "year": 1882, "month": 4, "variance": -0.659 },
    { "year": 1882, "month": 5, "variance": -0.482 },
    { "year": 1882, "month": 6, "variance": -0.737 },
    { "year": 1882, "month": 7, "variance": -0.645 },
    { "year": 1882, "month": 8, "variance": -0.215 },
    { "year": 1882, "month": 9, "variance": -0.406 },
    { "year": 1882, "month": 10, "variance": -0.849 },
    { "year": 1882, "month": 11, "variance": -1.055 },
    { "year": 1882, "month": 12, "variance": -1.450 },
    { "year": 1883, "month": 1, "variance": -1.130 },
    { "year": 1883, "month": 2, "variance": -1.314 },
    { "year": 1883, "month": 3, "variance": -0.397 },
    { "year": 1883, "month": 4, "variance": -0.649 },
    { "year": 1883, "month": 5, "variance": -0.517 },
    { "year": 1883, "month": 6, "variance": -0.233 },
    { "year": 1883, "month": 7, "variance": -0.379 },
    { "year": 1883, "month": 8, "variance": -0.652 },
    { "year": 1883, "month": 9, "variance": -0.789 },
    { "year": 1883, "month": 10, "variance": -0.354 },
    { "year": 1883, "month": 11, "variance": -1.201 },
    { "year": 1883, "month": 12, "variance": -0.355 },
    { "year": 1884, "month": 1, "variance": -0.462 },
    { "year": 1884, "month": 2, "variance": -0.745 },
    { "year": 1884, "month": 3, "variance": -1.448 },
    { "year": 1884, "month": 4, "variance": -1.142 },
    { "year": 1884, "month": 5, "variance": -1.168 },
    { "year": 1884, "month": 6, "variance": -0.986 },
    { "year": 1884, "month": 7, "variance": -0.713 },
    { "year": 1884, "month": 8, "variance": -0.624 },
    { "year": 1884, "month": 9, "variance": -0.858 },
    { "year": 1884, "month": 10, "variance": -0.693 },
    { "year": 1884, "month": 11, "variance": -0.970 },
    { "year": 1884, "month": 12, "variance": -0.605 },
    { "year": 1885, "month": 1, "variance": -1.533 },
    { "year": 1885, "month": 2, "variance": -0.912 },
    { "year": 1885, "month": 3, "variance": -0.690 },
    { "year": 1885, "month": 4, "variance": -1.004 },
    { "year": 1885, "month": 5, "variance": -0.782 },
    { "year": 1885, "month": 6, "variance": -0.806 },
    { "year": 1885, "month": 7, "variance": -0.390 },
    { "year": 1885, "month": 8, "variance": -0.555 },
    { "year": 1885, "month": 9, "variance": -0.653 },
    { "year": 1885, "month": 10, "variance": -0.524 },
    { "year": 1885, "month": 11, "variance": -0.855 },
    { "year": 1885, "month": 12, "variance": 0.045 },
    { "year": 1886, "month": 1, "variance": -1.111 },
    { "year": 1886, "month": 2, "variance": -1.371 },
    { "year": 1886, "month": 3, "variance": -1.033 },
    { "year": 1886, "month": 4, "variance": -0.413 },
    { "year": 1886, "month": 5, "variance": -0.605 },
    { "year": 1886, "month": 6, "variance": -0.744 },
    { "year": 1886, "month": 7, "variance": -0.191 },
    { "year": 1886, "month": 8, "variance": -0.583 },
    { "year": 1886, "month": 9, "variance": -0.504 },
    { "year": 1886, "month": 10, "variance": -0.673 },
    { "year": 1886, "month": 11, "variance": -0.852 },
    { "year": 1886, "month": 12, "variance": -0.123 },
    { "year": 1887, "month": 1, "variance": -1.728 },
    { "year": 1887, "month": 2, "variance": -1.099 },
    { "year": 1887, "month": 3, "variance": -0.718 },
    { "year": 1887, "month": 4, "variance": -0.526 },
    { "year": 1887, "month": 5, "variance": -0.519 },
    { "year": 1887, "month": 6, "variance": -0.677 },
    { "year": 1887, "month": 7, "variance": -0.364 },
    { "year": 1887, "month": 8, "variance": -0.775 },
    { "year": 1887, "month": 9, "variance": -0.396 },
    { "year": 1887, "month": 10, "variance": -0.526 },
    { "year": 1887, "month": 11, "variance": -0.545 },
    { "year": 1887, "month": 12, "variance": -0.726 },
    { "year": 1888, "month": 1, "variance": -0.838 },
    { "year": 1888, "month": 2, "variance": -1.111 },
    { "year": 1888, "month": 3, "variance": -0.964 },
    { "year": 1888, "month": 4, "variance": -0.464 },
    { "year": 1888, "month": 5, "variance": -0.726 },
    { "year": 1888, "month": 6, "variance": -0.651 },
    { "year": 1888, "month": 7, "variance": -0.145 },
    { "year": 1888, "month": 8, "variance": -0.365 },
    { "year": 1888, "month": 9, "variance": -0.404 },
    { "year": 1888, "month": 10, "variance": -0.066 },
    { "year": 1888, "month": 11, "variance": -0.283 },
    { "year": 1888, "month": 12, "variance": -0.361 },
    { "year": 1889, "month": 1, "variance": -0.795 },
    { "year": 1889, "month": 2, "variance": 0.275 },
    { "year": 1889, "month": 3, "variance": 0.033 },
    { "year": 1889, "month": 4, "variance": 0.275 },
    { "year": 1889, "month": 5, "variance": -0.117 },
    { "year": 1889, "month": 6, "variance": -0.221 },
    { "year": 1889, "month": 7, "variance": -0.174 },
    { "year": 1889, "month": 8, "variance": -0.391 },
    { "year": 1889, "month": 9, "variance": -0.542 },
    { "year": 1889, "month": 10, "variance": -0.403 },
    { "year": 1889, "month": 11, "variance": -1.106 },
    { "year": 1889, "month": 12, "variance": -0.503 },
    { "year": 1890, "month": 1, "variance": -0.704 },
    { "year": 1890, "month": 2, "variance": -0.697 },
    { "year": 1890, "month": 3, "variance": -1.034 },
    { "year": 1890, "month": 4, "variance": -0.565 },
    { "year": 1890, "month": 5, "variance": -0.898 },
    { "year": 1890, "month": 6, "variance": -0.644 },
    { "year": 1890, "month": 7, "variance": -0.345 },
    { "year": 1890, "month": 8, "variance": -0.612 },
    { "year": 1890, "month": 9, "variance": -0.589 },
    { "year": 1890, "month": 10, "variance": -0.087 },
    { "year": 1890, "month": 11, "variance": -1.019 },
    { "year": 1890, "month": 12, "variance": -0.646 },
    { "year": 1891, "month": 1, "variance": -0.874 },
    { "year": 1891, "month": 2, "variance": -1.283 },
    { "year": 1891, "month": 3, "variance": -0.515 },
    { "year": 1891, "month": 4, "variance": -0.703 },
    { "year": 1891, "month": 5, "variance": -0.554 },
    { "year": 1891, "month": 6, "variance": -0.646 },
    { "year": 1891, "month": 7, "variance": -0.474 },
    { "year": 1891, "month": 8, "variance": -0.424 },
    { "year": 1891, "month": 9, "variance": -0.378 },
    { "year": 1891, "month": 10, "variance": -0.531 },
    { "year": 1891, "month": 11, "variance": -0.994 },
    { "year": 1891, "month": 12, "variance": 0.015 },
    { "year": 1892, "month": 1, "variance": -0.594 },
    { "year": 1892, "month": 2, "variance": -0.352 },
    { "year": 1892, "month": 3, "variance": -0.921 },
    { "year": 1892, "month": 4, "variance": -0.746 },
    { "year": 1892, "month": 5, "variance": -0.725 },
    { "year": 1892, "month": 6, "variance": -0.264 },
    { "year": 1892, "month": 7, "variance": -0.520 },
    { "year": 1892, "month": 8, "variance": -0.477 },
    { "year": 1892, "month": 9, "variance": -0.351 },
    { "year": 1892, "month": 10, "variance": 0.021 },
    { "year": 1892, "month": 11, "variance": -1.241 },
    { "year": 1892, "month": 12, "variance": -0.682 },
    { "year": 1893, "month": 1, "variance": -2.088 },
    { "year": 1893, "month": 2, "variance": -1.553 },
    { "year": 1893, "month": 3, "variance": -0.316 },
    { "year": 1893, "month": 4, "variance": -0.312 },
    { "year": 1893, "month": 5, "variance": -0.604 },
    { "year": 1893, "month": 6, "variance": -0.468 },
    { "year": 1893, "month": 7, "variance": -0.088 },
    { "year": 1893, "month": 8, "variance": -0.443 },
    { "year": 1893, "month": 9, "variance": -0.341 },
    { "year": 1893, "month": 10, "variance": -0.095 },
    { "year": 1893, "month": 11, "variance": -0.194 },
    { "year": 1893, "month": 12, "variance": -0.429 },
    { "year": 1894, "month": 1, "variance": -0.849 },
    { "year": 1894, "month": 2, "variance": -0.235 },
    { "year": 1894, "month": 3, "variance": -0.137 },
    { "year": 1894, "month": 4, "variance": -0.652 },
    { "year": 1894, "month": 5, "variance": -0.397 },
    { "year": 1894, "month": 6, "variance": -0.682 },
    { "year": 1894, "month": 7, "variance": -0.399 },
    { "year": 1894, "month": 8, "variance": -0.413 },
    { "year": 1894, "month": 9, "variance": -0.521 },
    { "year": 1894, "month": 10, "variance": -0.127 },
    { "year": 1894, "month": 11, "variance": -0.656 },
    { "year": 1894, "month": 12, "variance": -0.470 },
    { "year": 1895, "month": 1, "variance": -1.256 },
    { "year": 1895, "month": 2, "variance": -1.167 },
    { "year": 1895, "month": 3, "variance": -0.602 },
    { "year": 1895, "month": 4, "variance": -0.067 },
    { "year": 1895, "month": 5, "variance": -0.473 },
    { "year": 1895, "month": 6, "variance": -0.462 },
    { "year": 1895, "month": 7, "variance": -0.339 },
    { "year": 1895, "month": 8, "variance": -0.376 },
    { "year": 1895, "month": 9, "variance": -0.349 },
    { "year": 1895, "month": 10, "variance": -0.140 },
    { "year": 1895, "month": 11, "variance": -0.351 },
    { "year": 1895, "month": 12, "variance": -0.128 },
    { "year": 1896, "month": 1, "variance": -0.268 },
    { "year": 1896, "month": 2, "variance": -0.472 },
    { "year": 1896, "month": 3, "variance": -0.959 },
    { "year": 1896, "month": 4, "variance": -0.933 },
    { "year": 1896, "month": 5, "variance": -0.419 },
    { "year": 1896, "month": 6, "variance": -0.161 },
    { "year": 1896, "month": 7, "variance": -0.118 },
    { "year": 1896, "month": 8, "variance": -0.238 },
    { "year": 1896, "month": 9, "variance": -0.190 },
    { "year": 1896, "month": 10, "variance": 0.194 },
    { "year": 1896, "month": 11, "variance": -0.732 },
    { "year": 1896, "month": 12, "variance": -0.241 },
    { "year": 1897, "month": 1, "variance": -0.661 },
    { "year": 1897, "month": 2, "variance": -0.733 },
    { "year": 1897, "month": 3, "variance": -0.938 },
    { "year": 1897, "month": 4, "variance": -0.025 },
    { "year": 1897, "month": 5, "variance": 0.030 },
    { "year": 1897, "month": 6, "variance": -0.175 },
    { "year": 1897, "month": 7, "variance": 0.014 },
    { "year": 1897, "month": 8, "variance": -0.161 },
    { "year": 1897, "month": 9, "variance": -0.078 },
    { "year": 1897, "month": 10, "variance": 0.059 },
    { "year": 1897, "month": 11, "variance": -0.489 },
    { "year": 1897, "month": 12, "variance": -0.386 },
    { "year": 1898, "month": 1, "variance": 0.221 },
    { "year": 1898, "month": 2, "variance": -0.834 },
    { "year": 1898, "month": 3, "variance": -1.510 },
    { "year": 1898, "month": 4, "variance": -0.354 },
    { "year": 1898, "month": 5, "variance": -0.519 },
    { "year": 1898, "month": 6, "variance": -0.178 },
    { "year": 1898, "month": 7, "variance": -0.250 },
    { "year": 1898, "month": 8, "variance": -0.318 },
    { "year": 1898, "month": 9, "variance": -0.354 },
    { "year": 1898, "month": 10, "variance": -0.483 },
    { "year": 1898, "month": 11, "variance": -0.655 },
    { "year": 1898, "month": 12, "variance": -0.219 },
    { "year": 1899, "month": 1, "variance": -0.064 },
    { "year": 1899, "month": 2, "variance": -0.813 },
    { "year": 1899, "month": 3, "variance": -0.756 },
    { "year": 1899, "month": 4, "variance": -0.121 },
    { "year": 1899, "month": 5, "variance": -0.292 },
    { "year": 1899, "month": 6, "variance": -0.620 },
    { "year": 1899, "month": 7, "variance": -0.227 },
    { "year": 1899, "month": 8, "variance": -0.173 },
    { "year": 1899, "month": 9, "variance": 0.030 },
    { "year": 1899, "month": 10, "variance": 0.132 },
    { "year": 1899, "month": 11, "variance": 0.454 },
    { "year": 1899, "month": 12, "variance": -0.636 },
    { "year": 1900, "month": 1, "variance": -1.083 },
    { "year": 1900, "month": 2, "variance": -0.177 },
    { "year": 1900, "month": 3, "variance": 0.157 },
    { "year": 1900, "month": 4, "variance": -0.057 },
    { "year": 1900, "month": 5, "variance": 0.010 },
    { "year": 1900, "month": 6, "variance": -0.133 },
    { "year": 1900, "month": 7, "variance": -0.181 },
    { "year": 1900, "month": 8, "variance": -0.056 },
    { "year": 1900, "month": 9, "variance": -0.139 },
    { "year": 1900, "month": 10, "variance": 0.402 },
    { "year": 1900, "month": 11, "variance": -0.259 },
    { "year": 1900, "month": 12, "variance": 0.045 },
    { "year": 1901, "month": 1, "variance": -0.367 },
    { "year": 1901, "month": 2, "variance": -0.092 },
    { "year": 1901, "month": 3, "variance": 0.339 },
    { "year": 1901, "month": 4, "variance": 0.208 },
    { "year": 1901, "month": 5, "variance": -0.162 },
    { "year": 1901, "month": 6, "variance": -0.091 },
    { "year": 1901, "month": 7, "variance": -0.019 },
    { "year": 1901, "month": 8, "variance": -0.063 },
    { "year": 1901, "month": 9, "variance": -0.125 },
    { "year": 1901, "month": 10, "variance": -0.267 },
    { "year": 1901, "month": 11, "variance": -0.155 },
    { "year": 1901, "month": 12, "variance": -0.324 },
    { "year": 1902, "month": 1, "variance": 0.004 },
    { "year": 1902, "month": 2, "variance": 0.393 },
    { "year": 1902, "month": 3, "variance": -0.440 },
    { "year": 1902, "month": 4, "variance": -0.344 },
    { "year": 1902, "month": 5, "variance": -0.418 },
    { "year": 1902, "month": 6, "variance": -0.273 },
    { "year": 1902, "month": 7, "variance": -0.126 },
    { "year": 1902, "month": 8, "variance": -0.273 },
    { "year": 1902, "month": 9, "variance": -0.348 },
    { "year": 1902, "month": 10, "variance": -0.487 },
    { "year": 1902, "month": 11, "variance": -0.910 },
    { "year": 1902, "month": 12, "variance": -0.933 },
    { "year": 1903, "month": 1, "variance": -0.082 },
    { "year": 1903, "month": 2, "variance": 0.317 },
    { "year": 1903, "month": 3, "variance": -0.327 },
    { "year": 1903, "month": 4, "variance": -0.412 },
    { "year": 1903, "month": 5, "variance": -0.503 },
    { "year": 1903, "month": 6, "variance": -0.572 },
    { "year": 1903, "month": 7, "variance": -0.338 },
    { "year": 1903, "month": 8, "variance": -0.422 },
    { "year": 1903, "month": 9, "variance": -0.513 },
    { "year": 1903, "month": 10, "variance": -0.473 },
    { "year": 1903, "month": 11, "variance": -0.625 },
    { "year": 1903, "month": 12, "variance": -0.725 },
    { "year": 1904, "month": 1, "variance": -0.936 },
    { "year": 1904, "month": 2, "variance": -0.842 },
    { "year": 1904, "month": 3, "variance": -0.778 },
    { "year": 1904, "month": 4, "variance": -0.630 },
    { "year": 1904, "month": 5, "variance": -0.514 },
    { "year": 1904, "month": 6, "variance": -0.507 },
    { "year": 1904, "month": 7, "variance": -0.531 },
    { "year": 1904, "month": 8, "variance": -0.413 },
    { "year": 1904, "month": 9, "variance": -0.675 },
    { "year": 1904, "month": 10, "variance": -0.457 },
    { "year": 1904, "month": 11, "variance": 0.058 },
    { "year": 1904, "month": 12, "variance": -0.330 },
    { "year": 1905, "month": 1, "variance": -0.298 },
    { "year": 1905, "month": 2, "variance": -1.285 },
    { "year": 1905, "month": 3, "variance": -0.667 },
    { "year": 1905, "month": 4, "variance": -0.578 },
    { "year": 1905, "month": 5, "variance": -0.351 },
    { "year": 1905, "month": 6, "variance": -0.348 },
    { "year": 1905, "month": 7, "variance": -0.266 },
    { "year": 1905, "month": 8, "variance": -0.284 },
    { "year": 1905, "month": 9, "variance": -0.239 },
    { "year": 1905, "month": 10, "variance": -0.172 },
    { "year": 1905, "month": 11, "variance": 0.097 },
    { "year": 1905, "month": 12, "variance": -0.275 },
    { "year": 1906, "month": 1, "variance": -0.469 },
    { "year": 1906, "month": 2, "variance": -0.861 },
    { "year": 1906, "month": 3, "variance": -0.411 },
    { "year": 1906, "month": 4, "variance": 0.317 },
    { "year": 1906, "month": 5, "variance": -0.079 },
    { "year": 1906, "month": 6, "variance": -0.144 },
    { "year": 1906, "month": 7, "variance": -0.241 },
    { "year": 1906, "month": 8, "variance": -0.185 },
    { "year": 1906, "month": 9, "variance": -0.301 },
    { "year": 1906, "month": 10, "variance": 0.020 },
    { "year": 1906, "month": 11, "variance": -0.600 },
    { "year": 1906, "month": 12, "variance": 0.134 },
    { "year": 1907, "month": 1, "variance": -0.729 },
    { "year": 1907, "month": 2, "variance": -1.032 },
    { "year": 1907, "month": 3, "variance": -0.701 },
    { "year": 1907, "month": 4, "variance": -0.734 },
    { "year": 1907, "month": 5, "variance": -0.968 },
    { "year": 1907, "month": 6, "variance": -0.746 },
    { "year": 1907, "month": 7, "variance": -0.619 },
    { "year": 1907, "month": 8, "variance": -0.535 },
    { "year": 1907, "month": 9, "variance": -0.434 },
    { "year": 1907, "month": 10, "variance": -0.026 },
    { "year": 1907, "month": 11, "variance": -0.929 },
    { "year": 1907, "month": 12, "variance": -0.679 },
    { "year": 1908, "month": 1, "variance": -0.319 },
    { "year": 1908, "month": 2, "variance": -0.391 },
    { "year": 1908, "month": 3, "variance": -1.170 },
    { "year": 1908, "month": 4, "variance": -0.492 },
    { "year": 1908, "month": 5, "variance": -0.228 },
    { "year": 1908, "month": 6, "variance": -0.218 },
    { "year": 1908, "month": 7, "variance": -0.208 },
    { "year": 1908, "month": 8, "variance": -0.519 },
    { "year": 1908, "month": 9, "variance": -0.131 },
    { "year": 1908, "month": 10, "variance": -0.408 },
    { "year": 1908, "month": 11, "variance": -0.874 },
    { "year": 1908, "month": 12, "variance": -0.571 },
    { "year": 1909, "month": 1, "variance": -1.168 },
    { "year": 1909, "month": 2, "variance": -0.492 },
    { "year": 1909, "month": 3, "variance": -0.721 },
    { "year": 1909, "month": 4, "variance": -0.813 },
    { "year": 1909, "month": 5, "variance": -0.752 },
    { "year": 1909, "month": 6, "variance": -0.557 },
    { "year": 1909, "month": 7, "variance": -0.334 },
    { "year": 1909, "month": 8, "variance": -0.135 },
    { "year": 1909, "month": 9, "variance": -0.209 },
    { "year": 1909, "month": 10, "variance": -0.078 },
    { "year": 1909, "month": 11, "variance": 0.118 },
    { "year": 1909, "month": 12, "variance": -0.393 },
    { "year": 1910, "month": 1, "variance": -0.185 },
    { "year": 1910, "month": 2, "variance": -0.394 },
    { "year": 1910, "month": 3, "variance": -0.717 },
    { "year": 1910, "month": 4, "variance": -0.219 },
    { "year": 1910, "month": 5, "variance": -0.370 },
    { "year": 1910, "month": 6, "variance": -0.387 },
    { "year": 1910, "month": 7, "variance": -0.094 },
    { "year": 1910, "month": 8, "variance": -0.214 },
    { "year": 1910, "month": 9, "variance": -0.381 },
    { "year": 1910, "month": 10, "variance": -0.282 },
    { "year": 1910, "month": 11, "variance": -0.804 },
    { "year": 1910, "month": 12, "variance": -0.930 },
    { "year": 1911, "month": 1, "variance": -0.897 },
    { "year": 1911, "month": 2, "variance": -0.729 },
    { "year": 1911, "month": 3, "variance": -0.952 },
    { "year": 1911, "month": 4, "variance": -0.350 },
    { "year": 1911, "month": 5, "variance": -0.562 },
    { "year": 1911, "month": 6, "variance": -0.493 },
    { "year": 1911, "month": 7, "variance": -0.326 },
    { "year": 1911, "month": 8, "variance": -0.407 },
    { "year": 1911, "month": 9, "variance": -0.484 },
    { "year": 1911, "month": 10, "variance": -0.031 },
    { "year": 1911, "month": 11, "variance": -0.183 },
    { "year": 1911, "month": 12, "variance": -0.236 },
    { "year": 1912, "month": 1, "variance": -0.156 },
    { "year": 1912, "month": 2, "variance": 0.139 },
    { "year": 1912, "month": 3, "variance": -0.957 },
    { "year": 1912, "month": 4, "variance": -0.124 },
    { "year": 1912, "month": 5, "variance": -0.116 },
    { "year": 1912, "month": 6, "variance": -0.113 },
    { "year": 1912, "month": 7, "variance": -0.676 },
    { "year": 1912, "month": 8, "variance": -0.829 },
    { "year": 1912, "month": 9, "variance": -0.873 },
    { "year": 1912, "month": 10, "variance": -0.922 },
    { "year": 1912, "month": 11, "variance": -0.621 },
    { "year": 1912, "month": 12, "variance": -0.577 },
    { "year": 1913, "month": 1, "variance": -0.477 },
    { "year": 1913, "month": 2, "variance": -0.810 },
    { "year": 1913, "month": 3, "variance": -0.803 },
    { "year": 1913, "month": 4, "variance": -0.320 },
    { "year": 1913, "month": 5, "variance": -0.609 },
    { "year": 1913, "month": 6, "variance": -0.518 },
    { "year": 1913, "month": 7, "variance": -0.258 },
    { "year": 1913, "month": 8, "variance": -0.169 },
    { "year": 1913, "month": 9, "variance": -0.367 },
    { "year": 1913, "month": 10, "variance": -0.240 },
    { "year": 1913, "month": 11, "variance": -0.116 },
    { "year": 1913, "month": 12, "variance": 0.481 },
    { "year": 1914, "month": 1, "variance": 0.847 },
    { "year": 1914, "month": 2, "variance": 0.058 },
    { "year": 1914, "month": 3, "variance": -0.384 },
    { "year": 1914, "month": 4, "variance": -0.273 },
    { "year": 1914, "month": 5, "variance": -0.085 },
    { "year": 1914, "month": 6, "variance": -0.038 },
    { "year": 1914, "month": 7, "variance": -0.125 },
    { "year": 1914, "month": 8, "variance": -0.188 },
    { "year": 1914, "month": 9, "variance": -0.198 },
    { "year": 1914, "month": 10, "variance": 0.118 },
    { "year": 1914, "month": 11, "variance": -0.368 },
    { "year": 1914, "month": 12, "variance": 0.025 },
    { "year": 1915, "month": 1, "variance": -0.283 },
    { "year": 1915, "month": 2, "variance": 0.061 },
    { "year": 1915, "month": 3, "variance": -0.187 },
    { "year": 1915, "month": 4, "variance": 0.347 },
    { "year": 1915, "month": 5, "variance": 0.125 },
    { "year": 1915, "month": 6, "variance": -0.194 },
    { "year": 1915, "month": 7, "variance": 0.051 },
    { "year": 1915, "month": 8, "variance": -0.108 },
    { "year": 1915, "month": 9, "variance": -0.216 },
    { "year": 1915, "month": 10, "variance": -0.276 },
    { "year": 1915, "month": 11, "variance": 0.051 },
    { "year": 1915, "month": 12, "variance": -0.020 },
    { "year": 1916, "month": 1, "variance": 0.019 },
    { "year": 1916, "month": 2, "variance": -0.253 },
    { "year": 1916, "month": 3, "variance": -0.480 },
    { "year": 1916, "month": 4, "variance": -0.271 },
    { "year": 1916, "month": 5, "variance": -0.345 },
    { "year": 1916, "month": 6, "variance": -0.574 },
    { "year": 1916, "month": 7, "variance": -0.340 },
    { "year": 1916, "month": 8, "variance": -0.333 },
    { "year": 1916, "month": 9, "variance": -0.394 },
    { "year": 1916, "month": 10, "variance": -0.268 },
    { "year": 1916, "month": 11, "variance": -0.547 },
    { "year": 1916, "month": 12, "variance": -1.334 },
    { "year": 1917, "month": 1, "variance": -0.461 },
    { "year": 1917, "month": 2, "variance": -0.856 },
    { "year": 1917, "month": 3, "variance": -0.848 },
    { "year": 1917, "month": 4, "variance": -0.490 },
    { "year": 1917, "month": 5, "variance": -0.924 },
    { "year": 1917, "month": 6, "variance": -0.620 },
    { "year": 1917, "month": 7, "variance": -0.154 },
    { "year": 1917, "month": 8, "variance": -0.404 },
    { "year": 1917, "month": 9, "variance": -0.382 },
    { "year": 1917, "month": 10, "variance": -0.740 },
    { "year": 1917, "month": 11, "variance": -0.333 },
    { "year": 1917, "month": 12, "variance": -1.406 },
    { "year": 1918, "month": 1, "variance": -0.674 },
    { "year": 1918, "month": 2, "variance": -0.744 },
    { "year": 1918, "month": 3, "variance": -0.506 },
    { "year": 1918, "month": 4, "variance": -0.699 },
    { "year": 1918, "month": 5, "variance": -0.810 },
    { "year": 1918, "month": 6, "variance": -0.587 },
    { "year": 1918, "month": 7, "variance": -0.393 },
    { "year": 1918, "month": 8, "variance": -0.479 },
    { "year": 1918, "month": 9, "variance": -0.224 },
    { "year": 1918, "month": 10, "variance": 0.149 },
    { "year": 1918, "month": 11, "variance": -0.470 },
    { "year": 1918, "month": 12, "variance": -0.827 },
    { "year": 1919, "month": 1, "variance": -0.418 },
    { "year": 1919, "month": 2, "variance": -0.353 },
    { "year": 1919, "month": 3, "variance": -0.569 },
    { "year": 1919, "month": 4, "variance": 0.154 },
    { "year": 1919, "month": 5, "variance": -0.380 },
    { "year": 1919, "month": 6, "variance": -0.303 },
    { "year": 1919, "month": 7, "variance": -0.132 },
    { "year": 1919, "month": 8, "variance": -0.118 },
    { "year": 1919, "month": 9, "variance": -0.134 },
    { "year": 1919, "month": 10, "variance": 0.083 },
    { "year": 1919, "month": 11, "variance": -0.635 },
    { "year": 1919, "month": 12, "variance": -0.447 },
    { "year": 1920, "month": 1, "variance": 0.239 },
    { "year": 1920, "month": 2, "variance": -0.461 },
    { "year": 1920, "month": 3, "variance": -0.108 },
    { "year": 1920, "month": 4, "variance": -0.084 },
    { "year": 1920, "month": 5, "variance": -0.234 },
    { "year": 1920, "month": 6, "variance": -0.440 },
    { "year": 1920, "month": 7, "variance": -0.181 },
    { "year": 1920, "month": 8, "variance": -0.255 },
    { "year": 1920, "month": 9, "variance": -0.324 },
    { "year": 1920, "month": 10, "variance": -0.254 },
    { "year": 1920, "month": 11, "variance": -0.580 },
    { "year": 1920, "month": 12, "variance": -1.038 },
    { "year": 1921, "month": 1, "variance": 0.357 },
    { "year": 1921, "month": 2, "variance": -0.088 },
    { "year": 1921, "month": 3, "variance": -0.242 },
    { "year": 1921, "month": 4, "variance": -0.025 },
    { "year": 1921, "month": 5, "variance": -0.112 },
    { "year": 1921, "month": 6, "variance": -0.086 },
    { "year": 1921, "month": 7, "variance": 0.017 },
    { "year": 1921, "month": 8, "variance": -0.344 },
    { "year": 1921, "month": 9, "variance": -0.241 },
    { "year": 1921, "month": 10, "variance": 0.008 },
    { "year": 1921, "month": 11, "variance": -0.266 },
    { "year": 1921, "month": 12, "variance": 0.008 },
    { "year": 1922, "month": 1, "variance": -0.446 },
    { "year": 1922, "month": 2, "variance": -0.838 },
    { "year": 1922, "month": 3, "variance": -0.170 },
    { "year": 1922, "month": 4, "variance": 0.049 },
    { "year": 1922, "month": 5, "variance": -0.251 },
    { "year": 1922, "month": 6, "variance": -0.192 },
    { "year": 1922, "month": 7, "variance": -0.127 },
    { "year": 1922, "month": 8, "variance": -0.343 },
    { "year": 1922, "month": 9, "variance": -0.355 },
    { "year": 1922, "month": 10, "variance": -0.220 },
    { "year": 1922, "month": 11, "variance": -0.087 },
    { "year": 1922, "month": 12, "variance": 0.001 },
    { "year": 1923, "month": 1, "variance": -0.131 },
    { "year": 1923, "month": 2, "variance": -0.644 },
    { "year": 1923, "month": 3, "variance": -0.458 },
    { "year": 1923, "month": 4, "variance": -0.593 },
    { "year": 1923, "month": 5, "variance": -0.493 },
    { "year": 1923, "month": 6, "variance": -0.227 },
    { "year": 1923, "month": 7, "variance": -0.436 },
    { "year": 1923, "month": 8, "variance": -0.311 },
    { "year": 1923, "month": 9, "variance": -0.241 },
    { "year": 1923, "month": 10, "variance": 0.249 },
    { "year": 1923, "month": 11, "variance": 0.223 },
    { "year": 1923, "month": 12, "variance": 0.213 },
    { "year": 1924, "month": 1, "variance": -0.268 },
    { "year": 1924, "month": 2, "variance": -0.304 },
    { "year": 1924, "month": 3, "variance": 0.026 },
    { "year": 1924, "month": 4, "variance": -0.364 },
    { "year": 1924, "month": 5, "variance": -0.147 },
    { "year": 1924, "month": 6, "variance": -0.171 },
    { "year": 1924, "month": 7, "variance": -0.113 },
    { "year": 1924, "month": 8, "variance": -0.258 },
    { "year": 1924, "month": 9, "variance": -0.158 },
    { "year": 1924, "month": 10, "variance": -0.068 },
    { "year": 1924, "month": 11, "variance": 0.245 },
    { "year": 1924, "month": 12, "variance": -0.183 },
    { "year": 1925, "month": 1, "variance": -0.316 },
    { "year": 1925, "month": 2, "variance": -0.514 },
    { "year": 1925, "month": 3, "variance": -0.224 },
    { "year": 1925, "month": 4, "variance": 0.097 },
    { "year": 1925, "month": 5, "variance": -0.306 },
    { "year": 1925, "month": 6, "variance": -0.442 },
    { "year": 1925, "month": 7, "variance": -0.348 },
    { "year": 1925, "month": 8, "variance": -0.148 },
    { "year": 1925, "month": 9, "variance": -0.132 },
    { "year": 1925, "month": 10, "variance": -0.076 },
    { "year": 1925, "month": 11, "variance": 0.200 },
    { "year": 1925, "month": 12, "variance": 0.716 },
    { "year": 1926, "month": 1, "variance": 0.856 },
    { "year": 1926, "month": 2, "variance": 0.513 },
    { "year": 1926, "month": 3, "variance": 0.514 },
    { "year": 1926, "month": 4, "variance": -0.111 },
    { "year": 1926, "month": 5, "variance": -0.389 },
    { "year": 1926, "month": 6, "variance": -0.238 },
    { "year": 1926, "month": 7, "variance": -0.230 },
    { "year": 1926, "month": 8, "variance": -0.029 },
    { "year": 1926, "month": 9, "variance": -0.039 },
    { "year": 1926, "month": 10, "variance": 0.306 },
    { "year": 1926, "month": 11, "variance": 0.161 },
    { "year": 1926, "month": 12, "variance": -0.318 },
    { "year": 1927, "month": 1, "variance": -0.247 },
    { "year": 1927, "month": 2, "variance": -0.150 },
    { "year": 1927, "month": 3, "variance": -0.603 },
    { "year": 1927, "month": 4, "variance": -0.254 },
    { "year": 1927, "month": 5, "variance": -0.201 },
    { "year": 1927, "month": 6, "variance": -0.253 },
    { "year": 1927, "month": 7, "variance": -0.082 },
    { "year": 1927, "month": 8, "variance": -0.205 },
    { "year": 1927, "month": 9, "variance": 0.141 },
    { "year": 1927, "month": 10, "variance": 0.618 },
    { "year": 1927, "month": 11, "variance": 0.200 },
    { "year": 1927, "month": 12, "variance": -0.416 },
    { "year": 1928, "month": 1, "variance": 0.440 },
    { "year": 1928, "month": 2, "variance": 0.140 },
    { "year": 1928, "month": 3, "variance": -0.307 },
    { "year": 1928, "month": 4, "variance": -0.090 },
    { "year": 1928, "month": 5, "variance": -0.178 },
    { "year": 1928, "month": 6, "variance": -0.417 },
    { "year": 1928, "month": 7, "variance": -0.117 },
    { "year": 1928, "month": 8, "variance": -0.237 },
    { "year": 1928, "month": 9, "variance": -0.089 },
    { "year": 1928, "month": 10, "variance": 0.206 },
    { "year": 1928, "month": 11, "variance": 0.178 },
    { "year": 1928, "month": 12, "variance": 0.195 },
    { "year": 1929, "month": 1, "variance": -0.562 },
    { "year": 1929, "month": 2, "variance": -1.059 },
    { "year": 1929, "month": 3, "variance": -0.176 },
    { "year": 1929, "month": 4, "variance": -0.233 },
    { "year": 1929, "month": 5, "variance": -0.451 },
    { "year": 1929, "month": 6, "variance": -0.609 },
    { "year": 1929, "month": 7, "variance": -0.459 },
    { "year": 1929, "month": 8, "variance": -0.244 },
    { "year": 1929, "month": 9, "variance": -0.316 },
    { "year": 1929, "month": 10, "variance": 0.200 },
    { "year": 1929, "month": 11, "variance": 0.053 },
    { "year": 1929, "month": 12, "variance": -1.085 },
    { "year": 1930, "month": 1, "variance": -0.211 },
    { "year": 1930, "month": 2, "variance": -0.062 },
    { "year": 1930, "month": 3, "variance": 0.206 },
    { "year": 1930, "month": 4, "variance": -0.167 },
    { "year": 1930, "month": 5, "variance": -0.248 },
    { "year": 1930, "month": 6, "variance": -0.197 },
    { "year": 1930, "month": 7, "variance": 0.047 },
    { "year": 1930, "month": 8, "variance": -0.013 },
    { "year": 1930, "month": 9, "variance": -0.261 },
    { "year": 1930, "month": 10, "variance": -0.034 },
    { "year": 1930, "month": 11, "variance": 0.419 },
    { "year": 1930, "month": 12, "variance": 0.144 },
    { "year": 1931, "month": 1, "variance": 0.143 },
    { "year": 1931, "month": 2, "variance": -0.520 },
    { "year": 1931, "month": 3, "variance": -0.101 },
    { "year": 1931, "month": 4, "variance": -0.192 },
    { "year": 1931, "month": 5, "variance": -0.351 },
    { "year": 1931, "month": 6, "variance": 0.039 },
    { "year": 1931, "month": 7, "variance": 0.179 },
    { "year": 1931, "month": 8, "variance": 0.204 },
    { "year": 1931, "month": 9, "variance": 0.158 },
    { "year": 1931, "month": 10, "variance": 0.652 },
    { "year": 1931, "month": 11, "variance": 0.091 },
    { "year": 1931, "month": 12, "variance": 0.350 },
    { "year": 1932, "month": 1, "variance": 0.999 },
    { "year": 1932, "month": 2, "variance": -0.237 },
    { "year": 1932, "month": 3, "variance": -0.384 },
    { "year": 1932, "month": 4, "variance": 0.418 },
    { "year": 1932, "month": 5, "variance": -0.131 },
    { "year": 1932, "month": 6, "variance": -0.150 },
    { "year": 1932, "month": 7, "variance": -0.036 },
    { "year": 1932, "month": 8, "variance": -0.189 },
    { "year": 1932, "month": 9, "variance": 0.184 },
    { "year": 1932, "month": 10, "variance": 0.404 },
    { "year": 1932, "month": 11, "variance": -0.228 },
    { "year": 1932, "month": 12, "variance": -0.142 },
    { "year": 1933, "month": 1, "variance": -0.442 },
    { "year": 1933, "month": 2, "variance": -0.566 },
    { "year": 1933, "month": 3, "variance": -0.445 },
    { "year": 1933, "month": 4, "variance": -0.212 },
    { "year": 1933, "month": 5, "variance": -0.295 },
    { "year": 1933, "month": 6, "variance": -0.407 },
    { "year": 1933, "month": 7, "variance": -0.170 },
    { "year": 1933, "month": 8, "variance": -0.159 },
    { "year": 1933, "month": 9, "variance": -0.252 },
    { "year": 1933, "month": 10, "variance": -0.026 },
    { "year": 1933, "month": 11, "variance": -0.226 },
    { "year": 1933, "month": 12, "variance": -0.554 },
    { "year": 1934, "month": 1, "variance": -0.125 },
    { "year": 1934, "month": 2, "variance": 0.495 },
    { "year": 1934, "month": 3, "variance": -0.479 },
    { "year": 1934, "month": 4, "variance": -0.308 },
    { "year": 1934, "month": 5, "variance": 0.146 },
    { "year": 1934, "month": 6, "variance": -0.087 },
    { "year": 1934, "month": 7, "variance": -0.046 },
    { "year": 1934, "month": 8, "variance": -0.128 },
    { "year": 1934, "month": 9, "variance": -0.374 },
    { "year": 1934, "month": 10, "variance": 0.169 },
    { "year": 1934, "month": 11, "variance": 0.288 },
    { "year": 1934, "month": 12, "variance": 0.335 },
    { "year": 1935, "month": 1, "variance": -0.423 },
    { "year": 1935, "month": 2, "variance": 0.908 },
    { "year": 1935, "month": 3, "variance": 0.082 },
    { "year": 1935, "month": 4, "variance": -0.549 },
    { "year": 1935, "month": 5, "variance": -0.435 },
    { "year": 1935, "month": 6, "variance": -0.180 },
    { "year": 1935, "month": 7, "variance": -0.062 },
    { "year": 1935, "month": 8, "variance": -0.130 },
    { "year": 1935, "month": 9, "variance": -0.116 },
    { "year": 1935, "month": 10, "variance": 0.253 },
    { "year": 1935, "month": 11, "variance": -0.685 },
    { "year": 1935, "month": 12, "variance": -0.228 },
    { "year": 1936, "month": 1, "variance": -0.325 },
    { "year": 1936, "month": 2, "variance": -0.706 },
    { "year": 1936, "month": 3, "variance": -0.255 },
    { "year": 1936, "month": 4, "variance": -0.194 },
    { "year": 1936, "month": 5, "variance": -0.073 },
    { "year": 1936, "month": 6, "variance": -0.159 },
    { "year": 1936, "month": 7, "variance": 0.219 },
    { "year": 1936, "month": 8, "variance": -0.064 },
    { "year": 1936, "month": 9, "variance": -0.112 },
    { "year": 1936, "month": 10, "variance": 0.186 },
    { "year": 1936, "month": 11, "variance": 0.115 },
    { "year": 1936, "month": 12, "variance": 0.261 },
    { "year": 1937, "month": 1, "variance": -0.165 },
    { "year": 1937, "month": 2, "variance": 0.326 },
    { "year": 1937, "month": 3, "variance": -0.443 },
    { "year": 1937, "month": 4, "variance": -0.209 },
    { "year": 1937, "month": 5, "variance": 0.063 },
    { "year": 1937, "month": 6, "variance": 0.068 },
    { "year": 1937, "month": 7, "variance": -0.049 },
    { "year": 1937, "month": 8, "variance": 0.084 },
    { "year": 1937, "month": 9, "variance": 0.277 },
    { "year": 1937, "month": 10, "variance": 0.446 },
    { "year": 1937, "month": 11, "variance": 0.207 },
    { "year": 1937, "month": 12, "variance": -0.192 },
    { "year": 1938, "month": 1, "variance": 0.306 },
    { "year": 1938, "month": 2, "variance": 0.186 },
    { "year": 1938, "month": 3, "variance": 0.317 },
    { "year": 1938, "month": 4, "variance": 0.574 },
    { "year": 1938, "month": 5, "variance": 0.089 },
    { "year": 1938, "month": 6, "variance": -0.218 },
    { "year": 1938, "month": 7, "variance": 0.079 },
    { "year": 1938, "month": 8, "variance": 0.025 },
    { "year": 1938, "month": 9, "variance": 0.296 },
    { "year": 1938, "month": 10, "variance": 0.513 },
    { "year": 1938, "month": 11, "variance": 0.416 },
    { "year": 1938, "month": 12, "variance": -0.138 },
    { "year": 1939, "month": 1, "variance": 0.329 },
    { "year": 1939, "month": 2, "variance": 0.036 },
    { "year": 1939, "month": 3, "variance": -0.394 },
    { "year": 1939, "month": 4, "variance": -0.027 },
    { "year": 1939, "month": 5, "variance": 0.152 },
    { "year": 1939, "month": 6, "variance": -0.008 },
    { "year": 1939, "month": 7, "variance": -0.023 },
    { "year": 1939, "month": 8, "variance": -0.005 },
    { "year": 1939, "month": 9, "variance": -0.184 },
    { "year": 1939, "month": 10, "variance": -0.071 },
    { "year": 1939, "month": 11, "variance": 0.057 },
    { "year": 1939, "month": 12, "variance": 1.303 },
    { "year": 1940, "month": 1, "variance": -0.272 },
    { "year": 1940, "month": 2, "variance": 0.202 },
    { "year": 1940, "month": 3, "variance": 0.095 },
    { "year": 1940, "month": 4, "variance": 0.401 },
    { "year": 1940, "month": 5, "variance": -0.038 },
    { "year": 1940, "month": 6, "variance": 0.061 },
    { "year": 1940, "month": 7, "variance": 0.144 },
    { "year": 1940, "month": 8, "variance": -0.104 },
    { "year": 1940, "month": 9, "variance": 0.135 },
    { "year": 1940, "month": 10, "variance": 0.189 },
    { "year": 1940, "month": 11, "variance": -0.042 },
    { "year": 1940, "month": 12, "variance": 0.507 },
    { "year": 1941, "month": 1, "variance": 0.148 },
    { "year": 1941, "month": 2, "variance": 0.464 },
    { "year": 1941, "month": 3, "variance": -0.106 },
    { "year": 1941, "month": 4, "variance": 0.228 },
    { "year": 1941, "month": 5, "variance": 0.117 },
    { "year": 1941, "month": 6, "variance": 0.096 },
    { "year": 1941, "month": 7, "variance": 0.287 },
    { "year": 1941, "month": 8, "variance": 0.090 },
    { "year": 1941, "month": 9, "variance": -0.313 },
    { "year": 1941, "month": 10, "variance": 0.425 },
    { "year": 1941, "month": 11, "variance": -0.179 },
    { "year": 1941, "month": 12, "variance": 0.056 },
    { "year": 1942, "month": 1, "variance": 0.513 },
    { "year": 1942, "month": 2, "variance": -0.339 },
    { "year": 1942, "month": 3, "variance": -0.007 },
    { "year": 1942, "month": 4, "variance": 0.069 },
    { "year": 1942, "month": 5, "variance": -0.032 },
    { "year": 1942, "month": 6, "variance": 0.059 },
    { "year": 1942, "month": 7, "variance": -0.165 },
    { "year": 1942, "month": 8, "variance": -0.148 },
    { "year": 1942, "month": 9, "variance": 0.005 },
    { "year": 1942, "month": 10, "variance": 0.346 },
    { "year": 1942, "month": 11, "variance": 0.267 },
    { "year": 1942, "month": 12, "variance": 0.297 },
    { "year": 1943, "month": 1, "variance": -0.191 },
    { "year": 1943, "month": 2, "variance": 0.316 },
    { "year": 1943, "month": 3, "variance": -0.193 },
    { "year": 1943, "month": 4, "variance": 0.279 },
    { "year": 1943, "month": 5, "variance": 0.105 },
    { "year": 1943, "month": 6, "variance": -0.378 },
    { "year": 1943, "month": 7, "variance": 0.035 },
    { "year": 1943, "month": 8, "variance": -0.178 },
    { "year": 1943, "month": 9, "variance": -0.050 },
    { "year": 1943, "month": 10, "variance": 0.621 },
    { "year": 1943, "month": 11, "variance": 0.137 },
    { "year": 1943, "month": 12, "variance": 0.579 },
    { "year": 1944, "month": 1, "variance": 0.920 },
    { "year": 1944, "month": 2, "variance": 0.375 },
    { "year": 1944, "month": 3, "variance": 0.215 },
    { "year": 1944, "month": 4, "variance": 0.077 },
    { "year": 1944, "month": 5, "variance": -0.053 },
    { "year": 1944, "month": 6, "variance": -0.065 },
    { "year": 1944, "month": 7, "variance": 0.027 },
    { "year": 1944, "month": 8, "variance": 0.064 },
    { "year": 1944, "month": 9, "variance": 0.303 },
    { "year": 1944, "month": 10, "variance": 0.533 },
    { "year": 1944, "month": 11, "variance": -0.032 },
    { "year": 1944, "month": 12, "variance": -0.216 },
    { "year": 1945, "month": 1, "variance": -0.045 },
    { "year": 1945, "month": 2, "variance": -0.550 },
    { "year": 1945, "month": 3, "variance": -0.119 },
    { "year": 1945, "month": 4, "variance": 0.320 },
    { "year": 1945, "month": 5, "variance": -0.288 },
    { "year": 1945, "month": 6, "variance": -0.203 },
    { "year": 1945, "month": 7, "variance": -0.203 },
    { "year": 1945, "month": 8, "variance": 0.375 },
    { "year": 1945, "month": 9, "variance": 0.096 },
    { "year": 1945, "month": 10, "variance": 0.303 },
    { "year": 1945, "month": 11, "variance": -0.045 },
    { "year": 1945, "month": 12, "variance": -0.495 },
    { "year": 1946, "month": 1, "variance": 0.383 },
    { "year": 1946, "month": 2, "variance": 0.259 },
    { "year": 1946, "month": 3, "variance": -0.059 },
    { "year": 1946, "month": 4, "variance": 0.487 },
    { "year": 1946, "month": 5, "variance": -0.014 },
    { "year": 1946, "month": 6, "variance": -0.238 },
    { "year": 1946, "month": 7, "variance": 0.000 },
    { "year": 1946, "month": 8, "variance": -0.116 },
    { "year": 1946, "month": 9, "variance": -0.073 },
    { "year": 1946, "month": 10, "variance": 0.017 },
    { "year": 1946, "month": 11, "variance": 0.123 },
    { "year": 1946, "month": 12, "variance": -0.502 },
    { "year": 1947, "month": 1, "variance": -0.001 },
    { "year": 1947, "month": 2, "variance": 0.076 },
    { "year": 1947, "month": 3, "variance": 0.483 },
    { "year": 1947, "month": 4, "variance": 0.339 },
    { "year": 1947, "month": 5, "variance": -0.038 },
    { "year": 1947, "month": 6, "variance": -0.065 },
    { "year": 1947, "month": 7, "variance": -0.067 },
    { "year": 1947, "month": 8, "variance": -0.100 },
    { "year": 1947, "month": 9, "variance": 0.030 },
    { "year": 1947, "month": 10, "variance": 0.743 },
    { "year": 1947, "month": 11, "variance": 0.305 },
    { "year": 1947, "month": 12, "variance": 0.014 },
    { "year": 1948, "month": 1, "variance": 0.786 },
    { "year": 1948, "month": 2, "variance": 0.006 },
    { "year": 1948, "month": 3, "variance": -0.405 },
    { "year": 1948, "month": 4, "variance": 0.150 },
    { "year": 1948, "month": 5, "variance": 0.169 },
    { "year": 1948, "month": 6, "variance": 0.138 },
    { "year": 1948, "month": 7, "variance": 0.034 },
    { "year": 1948, "month": 8, "variance": -0.044 },
    { "year": 1948, "month": 9, "variance": 0.021 },
    { "year": 1948, "month": 10, "variance": 0.306 },
    { "year": 1948, "month": 11, "variance": 0.076 },
    { "year": 1948, "month": 12, "variance": -0.159 },
    { "year": 1949, "month": 1, "variance": 0.613 },
    { "year": 1949, "month": 2, "variance": -0.455 },
    { "year": 1949, "month": 3, "variance": -0.251 },
    { "year": 1949, "month": 4, "variance": -0.011 },
    { "year": 1949, "month": 5, "variance": -0.056 },
    { "year": 1949, "month": 6, "variance": -0.308 },
    { "year": 1949, "month": 7, "variance": -0.205 },
    { "year": 1949, "month": 8, "variance": -0.102 },
    { "year": 1949, "month": 9, "variance": -0.167 },
    { "year": 1949, "month": 10, "variance": 0.258 },
    { "year": 1949, "month": 11, "variance": 0.040 },
    { "year": 1949, "month": 12, "variance": -0.192 },
    { "year": 1950, "month": 1, "variance": -0.600 },
    { "year": 1950, "month": 2, "variance": -0.503 },
    { "year": 1950, "month": 3, "variance": -0.086 },
    { "year": 1950, "month": 4, "variance": -0.233 },
    { "year": 1950, "month": 5, "variance": -0.074 },
    { "year": 1950, "month": 6, "variance": -0.147 },
    { "year": 1950, "month": 7, "variance": -0.275 },
    { "year": 1950, "month": 8, "variance": -0.504 },
    { "year": 1950, "month": 9, "variance": -0.182 },
    { "year": 1950, "month": 10, "variance": -0.116 },
    { "year": 1950, "month": 11, "variance": -0.736 },
    { "year": 1950, "month": 12, "variance": -0.113 },
    { "year": 1951, "month": 1, "variance": -0.492 },
    { "year": 1951, "month": 2, "variance": -0.903 },
    { "year": 1951, "month": 3, "variance": -0.241 },
    { "year": 1951, "month": 4, "variance": 0.012 },
    { "year": 1951, "month": 5, "variance": 0.143 },
    { "year": 1951, "month": 6, "variance": -0.221 },
    { "year": 1951, "month": 7, "variance": -0.124 },
    { "year": 1951, "month": 8, "variance": 0.073 },
    { "year": 1951, "month": 9, "variance": 0.191 },
    { "year": 1951, "month": 10, "variance": 0.405 },
    { "year": 1951, "month": 11, "variance": 0.099 },
    { "year": 1951, "month": 12, "variance": 0.679 },
    { "year": 1952, "month": 1, "variance": 0.438 },
    { "year": 1952, "month": 2, "variance": 0.182 },
    { "year": 1952, "month": 3, "variance": -0.363 },
    { "year": 1952, "month": 4, "variance": 0.110 },
    { "year": 1952, "month": 5, "variance": -0.000 },
    { "year": 1952, "month": 6, "variance": -0.077 },
    { "year": 1952, "month": 7, "variance": 0.145 },
    { "year": 1952, "month": 8, "variance": 0.032 },
    { "year": 1952, "month": 9, "variance": 0.109 },
    { "year": 1952, "month": 10, "variance": -0.104 },
    { "year": 1952, "month": 11, "variance": -0.682 },
    { "year": 1952, "month": 12, "variance": 0.014 },
    { "year": 1953, "month": 1, "variance": 0.354 },
    { "year": 1953, "month": 2, "variance": 0.427 },
    { "year": 1953, "month": 3, "variance": 0.391 },
    { "year": 1953, "month": 4, "variance": 0.539 },
    { "year": 1953, "month": 5, "variance": 0.153 },
    { "year": 1953, "month": 6, "variance": 0.094 },
    { "year": 1953, "month": 7, "variance": -0.022 },
    { "year": 1953, "month": 8, "variance": 0.129 },
    { "year": 1953, "month": 9, "variance": 0.081 },
    { "year": 1953, "month": 10, "variance": 0.343 },
    { "year": 1953, "month": 11, "variance": -0.191 },
    { "year": 1953, "month": 12, "variance": 0.343 },
    { "year": 1954, "month": 1, "variance": -0.559 },
    { "year": 1954, "month": 2, "variance": -0.187 },
    { "year": 1954, "month": 3, "variance": -0.169 },
    { "year": 1954, "month": 4, "variance": -0.191 },
    { "year": 1954, "month": 5, "variance": -0.371 },
    { "year": 1954, "month": 6, "variance": -0.120 },
    { "year": 1954, "month": 7, "variance": -0.157 },
    { "year": 1954, "month": 8, "variance": -0.068 },
    { "year": 1954, "month": 9, "variance": -0.019 },
    { "year": 1954, "month": 10, "variance": 0.285 },
    { "year": 1954, "month": 11, "variance": 0.482 },
    { "year": 1954, "month": 12, "variance": -0.096 },
    { "year": 1955, "month": 1, "variance": 0.798 },
    { "year": 1955, "month": 2, "variance": -0.085 },
    { "year": 1955, "month": 3, "variance": -0.747 },
    { "year": 1955, "month": 4, "variance": -0.213 },
    { "year": 1955, "month": 5, "variance": -0.170 },
    { "year": 1955, "month": 6, "variance": 0.035 },
    { "year": 1955, "month": 7, "variance": -0.173 },
    { "year": 1955, "month": 8, "variance": 0.350 },
    { "year": 1955, "month": 9, "variance": -0.169 },
    { "year": 1955, "month": 10, "variance": 0.477 },
    { "year": 1955, "month": 11, "variance": -0.148 },
    { "year": 1955, "month": 12, "variance": -0.351 },
    { "year": 1956, "month": 1, "variance": -0.140 },
    { "year": 1956, "month": 2, "variance": -0.442 },
    { "year": 1956, "month": 3, "variance": -0.430 },
    { "year": 1956, "month": 4, "variance": -0.428 },
    { "year": 1956, "month": 5, "variance": -0.639 },
    { "year": 1956, "month": 6, "variance": -0.357 },
    { "year": 1956, "month": 7, "variance": -0.241 },
    { "year": 1956, "month": 8, "variance": -0.756 },
    { "year": 1956, "month": 9, "variance": -0.334 },
    { "year": 1956, "month": 10, "variance": -0.323 },
    { "year": 1956, "month": 11, "variance": -0.369 },
    { "year": 1956, "month": 12, "variance": -0.050 },
    { "year": 1957, "month": 1, "variance": -0.125 },
    { "year": 1957, "month": 2, "variance": -0.086 },
    { "year": 1957, "month": 3, "variance": -0.282 },
    { "year": 1957, "month": 4, "variance": 0.016 },
    { "year": 1957, "month": 5, "variance": -0.113 },
    { "year": 1957, "month": 6, "variance": 0.255 },
    { "year": 1957, "month": 7, "variance": -0.282 },
    { "year": 1957, "month": 8, "variance": 0.143 },
    { "year": 1957, "month": 9, "variance": 0.189 },
    { "year": 1957, "month": 10, "variance": 0.229 },
    { "year": 1957, "month": 11, "variance": 0.276 },
    { "year": 1957, "month": 12, "variance": 0.681 },
    { "year": 1958, "month": 1, "variance": 0.958 },
    { "year": 1958, "month": 2, "variance": 0.475 },
    { "year": 1958, "month": 3, "variance": 0.125 },
    { "year": 1958, "month": 4, "variance": 0.167 },
    { "year": 1958, "month": 5, "variance": 0.152 },
    { "year": 1958, "month": 6, "variance": -0.340 },
    { "year": 1958, "month": 7, "variance": 0.021 },
    { "year": 1958, "month": 8, "variance": -0.342 },
    { "year": 1958, "month": 9, "variance": -0.282 },
    { "year": 1958, "month": 10, "variance": 0.116 },
    { "year": 1958, "month": 11, "variance": 0.148 },
    { "year": 1958, "month": 12, "variance": 0.172 },
    { "year": 1959, "month": 1, "variance": 0.340 },
    { "year": 1959, "month": 2, "variance": 0.113 },
    { "year": 1959, "month": 3, "variance": 0.529 },
    { "year": 1959, "month": 4, "variance": 0.466 },
    { "year": 1959, "month": 5, "variance": -0.038 },
    { "year": 1959, "month": 6, "variance": 0.052 },
    { "year": 1959, "month": 7, "variance": 0.036 },
    { "year": 1959, "month": 8, "variance": -0.080 },
    { "year": 1959, "month": 9, "variance": -0.187 },
    { "year": 1959, "month": 10, "variance": -0.101 },
    { "year": 1959, "month": 11, "variance": -0.347 },
    { "year": 1959, "month": 12, "variance": 0.127 },
    { "year": 1960, "month": 1, "variance": 0.103 },
    { "year": 1960, "month": 2, "variance": 0.588 },
    { "year": 1960, "month": 3, "variance": -1.012 },
    { "year": 1960, "month": 4, "variance": -0.221 },
    { "year": 1960, "month": 5, "variance": -0.498 },
    { "year": 1960, "month": 6, "variance": -0.045 },
    { "year": 1960, "month": 7, "variance": -0.219 },
    { "year": 1960, "month": 8, "variance": -0.115 },
    { "year": 1960, "month": 9, "variance": -0.035 },
    { "year": 1960, "month": 10, "variance": 0.232 },
    { "year": 1960, "month": 11, "variance": -0.276 },
    { "year": 1960, "month": 12, "variance": 0.604 },
    { "year": 1961, "month": 1, "variance": 0.318 },
    { "year": 1961, "month": 2, "variance": 0.462 },
    { "year": 1961, "month": 3, "variance": 0.252 },
    { "year": 1961, "month": 4, "variance": 0.298 },
    { "year": 1961, "month": 5, "variance": 0.257 },
    { "year": 1961, "month": 6, "variance": 0.171 },
    { "year": 1961, "month": 7, "variance": -0.122 },
    { "year": 1961, "month": 8, "variance": -0.075 },
    { "year": 1961, "month": 9, "variance": 0.117 },
    { "year": 1961, "month": 10, "variance": 0.060 },
    { "year": 1961, "month": 11, "variance": 0.099 },
    { "year": 1961, "month": 12, "variance": -0.144 },
    { "year": 1962, "month": 1, "variance": 0.387 },
    { "year": 1962, "month": 2, "variance": 0.476 },
    { "year": 1962, "month": 3, "variance": 0.204 },
    { "year": 1962, "month": 4, "variance": 0.186 },
    { "year": 1962, "month": 5, "variance": -0.232 },
    { "year": 1962, "month": 6, "variance": -0.098 },
    { "year": 1962, "month": 7, "variance": -0.194 },
    { "year": 1962, "month": 8, "variance": -0.209 },
    { "year": 1962, "month": 9, "variance": -0.104 },
    { "year": 1962, "month": 10, "variance": 0.201 },
    { "year": 1962, "month": 11, "variance": 0.186 },
    { "year": 1962, "month": 12, "variance": 0.280 },
    { "year": 1963, "month": 1, "variance": 0.285 },
    { "year": 1963, "month": 2, "variance": 0.794 },
    { "year": 1963, "month": 3, "variance": -0.227 },
    { "year": 1963, "month": 4, "variance": -0.195 },
    { "year": 1963, "month": 5, "variance": -0.325 },
    { "year": 1963, "month": 6, "variance": -0.123 },
    { "year": 1963, "month": 7, "variance": 0.098 },
    { "year": 1963, "month": 8, "variance": 0.375 },
    { "year": 1963, "month": 9, "variance": 0.425 },
    { "year": 1963, "month": 10, "variance": 0.689 },
    { "year": 1963, "month": 11, "variance": 0.447 },
    { "year": 1963, "month": 12, "variance": 0.109 },
    { "year": 1964, "month": 1, "variance": 0.260 },
    { "year": 1964, "month": 2, "variance": -0.196 },
    { "year": 1964, "month": 3, "variance": -0.467 },
    { "year": 1964, "month": 4, "variance": -0.438 },
    { "year": 1964, "month": 5, "variance": -0.456 },
    { "year": 1964, "month": 6, "variance": -0.066 },
    { "year": 1964, "month": 7, "variance": -0.107 },
    { "year": 1964, "month": 8, "variance": -0.250 },
    { "year": 1964, "month": 9, "variance": -0.526 },
    { "year": 1964, "month": 10, "variance": -0.439 },
    { "year": 1964, "month": 11, "variance": -0.119 },
    { "year": 1964, "month": 12, "variance": -0.198 },
    { "year": 1965, "month": 1, "variance": 0.238 },
    { "year": 1965, "month": 2, "variance": -0.197 },
    { "year": 1965, "month": 3, "variance": -0.152 },
    { "year": 1965, "month": 4, "variance": -0.369 },
    { "year": 1965, "month": 5, "variance": -0.147 },
    { "year": 1965, "month": 6, "variance": -0.218 },
    { "year": 1965, "month": 7, "variance": -0.333 },
    { "year": 1965, "month": 8, "variance": -0.116 },
    { "year": 1965, "month": 9, "variance": -0.390 },
    { "year": 1965, "month": 10, "variance": 0.228 },
    { "year": 1965, "month": 11, "variance": -0.244 },
    { "year": 1965, "month": 12, "variance": 0.114 },
    { "year": 1966, "month": 1, "variance": -0.140 },
    { "year": 1966, "month": 2, "variance": 0.062 },
    { "year": 1966, "month": 3, "variance": 0.200 },
    { "year": 1966, "month": 4, "variance": -0.195 },
    { "year": 1966, "month": 5, "variance": -0.170 },
    { "year": 1966, "month": 6, "variance": 0.064 },
    { "year": 1966, "month": 7, "variance": 0.170 },
    { "year": 1966, "month": 8, "variance": -0.188 },
    { "year": 1966, "month": 9, "variance": 0.017 },
    { "year": 1966, "month": 10, "variance": -0.101 },
    { "year": 1966, "month": 11, "variance": -0.134 },
    { "year": 1966, "month": 12, "variance": -0.274 },
    { "year": 1967, "month": 1, "variance": 0.097 },
    { "year": 1967, "month": 2, "variance": -0.322 },
    { "year": 1967, "month": 3, "variance": 0.077 },
    { "year": 1967, "month": 4, "variance": 0.090 },
    { "year": 1967, "month": 5, "variance": 0.290 },
    { "year": 1967, "month": 6, "variance": -0.336 },
    { "year": 1967, "month": 7, "variance": -0.061 },
    { "year": 1967, "month": 8, "variance": -0.126 },
    { "year": 1967, "month": 9, "variance": -0.074 },
    { "year": 1967, "month": 10, "variance": 0.541 },
    { "year": 1967, "month": 11, "variance": 0.071 },
    { "year": 1967, "month": 12, "variance": 0.254 },
    { "year": 1968, "month": 1, "variance": -0.267 },
    { "year": 1968, "month": 2, "variance": 0.020 },
    { "year": 1968, "month": 3, "variance": 0.787 },
    { "year": 1968, "month": 4, "variance": 0.096 },
    { "year": 1968, "month": 5, "variance": -0.299 },
    { "year": 1968, "month": 6, "variance": -0.317 },
    { "year": 1968, "month": 7, "variance": -0.370 },
    { "year": 1968, "month": 8, "variance": -0.435 },
    { "year": 1968, "month": 9, "variance": -0.511 },
    { "year": 1968, "month": 10, "variance": 0.188 },
    { "year": 1968, "month": 11, "variance": -0.202 },
    { "year": 1968, "month": 12, "variance": -0.413 },
    { "year": 1969, "month": 1, "variance": -0.648 },
    { "year": 1969, "month": 2, "variance": -0.753 },
    { "year": 1969, "month": 3, "variance": -0.192 },
    { "year": 1969, "month": 4, "variance": 0.220 },
    { "year": 1969, "month": 5, "variance": -0.019 },
    { "year": 1969, "month": 6, "variance": -0.054 },
    { "year": 1969, "month": 7, "variance": -0.185 },
    { "year": 1969, "month": 8, "variance": -0.114 },
    { "year": 1969, "month": 9, "variance": -0.081 },
    { "year": 1969, "month": 10, "variance": 0.238 },
    { "year": 1969, "month": 11, "variance": 0.326 },
    { "year": 1969, "month": 12, "variance": 0.550 },
    { "year": 1970, "month": 1, "variance": 0.219 },
    { "year": 1970, "month": 2, "variance": 0.517 },
    { "year": 1970, "month": 3, "variance": -0.062 },
    { "year": 1970, "month": 4, "variance": 0.232 },
    { "year": 1970, "month": 5, "variance": -0.167 },
    { "year": 1970, "month": 6, "variance": -0.027 },
    { "year": 1970, "month": 7, "variance": -0.008 },
    { "year": 1970, "month": 8, "variance": -0.275 },
    { "year": 1970, "month": 9, "variance": 0.153 },
    { "year": 1970, "month": 10, "variance": 0.099 },
    { "year": 1970, "month": 11, "variance": -0.048 },
    { "year": 1970, "month": 12, "variance": -0.122 },
    { "year": 1971, "month": 1, "variance": 0.350 },
    { "year": 1971, "month": 2, "variance": -0.340 },
    { "year": 1971, "month": 3, "variance": -0.318 },
    { "year": 1971, "month": 4, "variance": -0.014 },
    { "year": 1971, "month": 5, "variance": -0.161 },
    { "year": 1971, "month": 6, "variance": -0.437 },
    { "year": 1971, "month": 7, "variance": -0.267 },
    { "year": 1971, "month": 8, "variance": -0.049 },
    { "year": 1971, "month": 9, "variance": 0.016 },
    { "year": 1971, "month": 10, "variance": 0.134 },
    { "year": 1971, "month": 11, "variance": 0.199 },
    { "year": 1971, "month": 12, "variance": 0.216 },
    { "year": 1972, "month": 1, "variance": -0.725 },
    { "year": 1972, "month": 2, "variance": -0.600 },
    { "year": 1972, "month": 3, "variance": -0.031 },
    { "year": 1972, "month": 4, "variance": -0.014 },
    { "year": 1972, "month": 5, "variance": -0.204 },
    { "year": 1972, "month": 6, "variance": -0.020 },
    { "year": 1972, "month": 7, "variance": -0.175 },
    { "year": 1972, "month": 8, "variance": 0.245 },
    { "year": 1972, "month": 9, "variance": -0.222 },
    { "year": 1972, "month": 10, "variance": 0.096 },
    { "year": 1972, "month": 11, "variance": -0.295 },
    { "year": 1972, "month": 12, "variance": 0.141 },
    { "year": 1973, "month": 1, "variance": 0.414 },
    { "year": 1973, "month": 2, "variance": 0.676 },
    { "year": 1973, "month": 3, "variance": 0.489 },
    { "year": 1973, "month": 4, "variance": 0.584 },
    { "year": 1973, "month": 5, "variance": 0.386 },
    { "year": 1973, "month": 6, "variance": 0.290 },
    { "year": 1973, "month": 7, "variance": 0.020 },
    { "year": 1973, "month": 8, "variance": -0.059 },
    { "year": 1973, "month": 9, "variance": -0.004 },
    { "year": 1973, "month": 10, "variance": 0.351 },
    { "year": 1973, "month": 11, "variance": 0.120 },
    { "year": 1973, "month": 12, "variance": 0.185 },
    { "year": 1974, "month": 1, "variance": -0.348 },
    { "year": 1974, "month": 2, "variance": -0.641 },
    { "year": 1974, "month": 3, "variance": -0.131 },
    { "year": 1974, "month": 4, "variance": 0.029 },
    { "year": 1974, "month": 5, "variance": -0.179 },
    { "year": 1974, "month": 6, "variance": -0.146 },
    { "year": 1974, "month": 7, "variance": -0.118 },
    { "year": 1974, "month": 8, "variance": 0.089 },
    { "year": 1974, "month": 9, "variance": -0.384 },
    { "year": 1974, "month": 10, "variance": -0.159 },
    { "year": 1974, "month": 11, "variance": -0.186 },
    { "year": 1974, "month": 12, "variance": -0.105 },
    { "year": 1975, "month": 1, "variance": 0.437 },
    { "year": 1975, "month": 2, "variance": 0.171 },
    { "year": 1975, "month": 3, "variance": 0.385 },
    { "year": 1975, "month": 4, "variance": 0.229 },
    { "year": 1975, "month": 5, "variance": 0.376 },
    { "year": 1975, "month": 6, "variance": 0.024 },
    { "year": 1975, "month": 7, "variance": -0.049 },
    { "year": 1975, "month": 8, "variance": -0.421 },
    { "year": 1975, "month": 9, "variance": 0.027 },
    { "year": 1975, "month": 10, "variance": 0.065 },
    { "year": 1975, "month": 11, "variance": -0.191 },
    { "year": 1975, "month": 12, "variance": 0.027 },
    { "year": 1976, "month": 1, "variance": 0.274 },
    { "year": 1976, "month": 2, "variance": -0.170 },
    { "year": 1976, "month": 3, "variance": -0.804 },
    { "year": 1976, "month": 4, "variance": -0.078 },
    { "year": 1976, "month": 5, "variance": -0.430 },
    { "year": 1976, "month": 6, "variance": -0.446 },
    { "year": 1976, "month": 7, "variance": -0.249 },
    { "year": 1976, "month": 8, "variance": -0.413 },
    { "year": 1976, "month": 9, "variance": -0.234 },
    { "year": 1976, "month": 10, "variance": -0.735 },
    { "year": 1976, "month": 11, "variance": -0.436 },
    { "year": 1976, "month": 12, "variance": 0.040 },
    { "year": 1977, "month": 1, "variance": -0.104 },
    { "year": 1977, "month": 2, "variance": 0.259 },
    { "year": 1977, "month": 3, "variance": 0.374 },
    { "year": 1977, "month": 4, "variance": 0.491 },
    { "year": 1977, "month": 5, "variance": 0.403 },
    { "year": 1977, "month": 6, "variance": 0.355 },
    { "year": 1977, "month": 7, "variance": 0.228 },
    { "year": 1977, "month": 8, "variance": 0.168 },
    { "year": 1977, "month": 9, "variance": -0.262 },
    { "year": 1977, "month": 10, "variance": -0.099 },
    { "year": 1977, "month": 11, "variance": 0.432 },
    { "year": 1977, "month": 12, "variance": 0.082 },
    { "year": 1978, "month": 1, "variance": 0.090 },
    { "year": 1978, "month": 2, "variance": 0.250 },
    { "year": 1978, "month": 3, "variance": 0.281 },
    { "year": 1978, "month": 4, "variance": 0.438 },
    { "year": 1978, "month": 5, "variance": 0.036 },
    { "year": 1978, "month": 6, "variance": -0.307 },
    { "year": 1978, "month": 7, "variance": -0.038 },
    { "year": 1978, "month": 8, "variance": -0.616 },
    { "year": 1978, "month": 9, "variance": -0.088 },
    { "year": 1978, "month": 10, "variance": 0.094 },
    { "year": 1978, "month": 11, "variance": 0.253 },
    { "year": 1978, "month": 12, "variance": 0.086 },
    { "year": 1979, "month": 1, "variance": 0.077 },
    { "year": 1979, "month": 2, "variance": -0.388 },
    { "year": 1979, "month": 3, "variance": 0.149 },
    { "year": 1979, "month": 4, "variance": 0.093 },
    { "year": 1979, "month": 5, "variance": -0.173 },
    { "year": 1979, "month": 6, "variance": -0.037 },
    { "year": 1979, "month": 7, "variance": -0.295 },
    { "year": 1979, "month": 8, "variance": -0.077 },
    { "year": 1979, "month": 9, "variance": 0.136 },
    { "year": 1979, "month": 10, "variance": 0.341 },
    { "year": 1979, "month": 11, "variance": 0.195 },
    { "year": 1979, "month": 12, "variance": 0.956 },
    { "year": 1980, "month": 1, "variance": 0.354 },
    { "year": 1980, "month": 2, "variance": 0.467 },
    { "year": 1980, "month": 3, "variance": 0.052 },
    { "year": 1980, "month": 4, "variance": 0.570 },
    { "year": 1980, "month": 5, "variance": 0.386 },
    { "year": 1980, "month": 6, "variance": 0.062 },
    { "year": 1980, "month": 7, "variance": 0.328 },
    { "year": 1980, "month": 8, "variance": 0.276 },
    { "year": 1980, "month": 9, "variance": 0.216 },
    { "year": 1980, "month": 10, "variance": 0.315 },
    { "year": 1980, "month": 11, "variance": 0.591 },
    { "year": 1980, "month": 12, "variance": 0.375 },
    { "year": 1981, "month": 1, "variance": 1.168 },
    { "year": 1981, "month": 2, "variance": 0.813 },
    { "year": 1981, "month": 3, "variance": 0.918 },
    { "year": 1981, "month": 4, "variance": 0.603 },
    { "year": 1981, "month": 5, "variance": 0.191 },
    { "year": 1981, "month": 6, "variance": 0.245 },
    { "year": 1981, "month": 7, "variance": 0.331 },
    { "year": 1981, "month": 8, "variance": 0.577 },
    { "year": 1981, "month": 9, "variance": 0.111 },
    { "year": 1981, "month": 10, "variance": 0.129 },
    { "year": 1981, "month": 11, "variance": 0.184 },
    { "year": 1981, "month": 12, "variance": 0.866 },
    { "year": 1982, "month": 1, "variance": -0.049 },
    { "year": 1982, "month": 2, "variance": 0.063 },
    { "year": 1982, "month": 3, "variance": -0.448 },
    { "year": 1982, "month": 4, "variance": 0.105 },
    { "year": 1982, "month": 5, "variance": -0.037 },
    { "year": 1982, "month": 6, "variance": -0.283 },
    { "year": 1982, "month": 7, "variance": 0.139 },
    { "year": 1982, "month": 8, "variance": -0.118 },
    { "year": 1982, "month": 9, "variance": -0.085 },
    { "year": 1982, "month": 10, "variance": -0.017 },
    { "year": 1982, "month": 11, "variance": -0.142 },
    { "year": 1982, "month": 12, "variance": 0.691 },
    { "year": 1983, "month": 1, "variance": 0.833 },
    { "year": 1983, "month": 2, "variance": 0.576 },
    { "year": 1983, "month": 3, "variance": 0.370 },
    { "year": 1983, "month": 4, "variance": 0.337 },
    { "year": 1983, "month": 5, "variance": 0.367 },
    { "year": 1983, "month": 6, "variance": -0.049 },
    { "year": 1983, "month": 7, "variance": 0.005 },
    { "year": 1983, "month": 8, "variance": 0.377 },
    { "year": 1983, "month": 9, "variance": 0.578 },
    { "year": 1983, "month": 10, "variance": 0.226 },
    { "year": 1983, "month": 11, "variance": 0.672 },
    { "year": 1983, "month": 12, "variance": 0.178 },
    { "year": 1984, "month": 1, "variance": 0.325 },
    { "year": 1984, "month": 2, "variance": -0.122 },
    { "year": 1984, "month": 3, "variance": 0.340 },
    { "year": 1984, "month": 4, "variance": 0.067 },
    { "year": 1984, "month": 5, "variance": 0.609 },
    { "year": 1984, "month": 6, "variance": -0.134 },
    { "year": 1984, "month": 7, "variance": 0.018 },
    { "year": 1984, "month": 8, "variance": 0.047 },
    { "year": 1984, "month": 9, "variance": -0.112 },
    { "year": 1984, "month": 10, "variance": 0.123 },
    { "year": 1984, "month": 11, "variance": -0.274 },
    { "year": 1984, "month": 12, "variance": -0.442 },
    { "year": 1985, "month": 1, "variance": 0.416 },
    { "year": 1985, "month": 2, "variance": -0.512 },
    { "year": 1985, "month": 3, "variance": 0.126 },
    { "year": 1985, "month": 4, "variance": 0.281 },
    { "year": 1985, "month": 5, "variance": 0.061 },
    { "year": 1985, "month": 6, "variance": 0.029 },
    { "year": 1985, "month": 7, "variance": -0.410 },
    { "year": 1985, "month": 8, "variance": 0.131 },
    { "year": 1985, "month": 9, "variance": -0.157 },
    { "year": 1985, "month": 10, "variance": 0.086 },
    { "year": 1985, "month": 11, "variance": -0.130 },
    { "year": 1985, "month": 12, "variance": 0.181 },
    { "year": 1986, "month": 1, "variance": 0.710 },
    { "year": 1986, "month": 2, "variance": 0.792 },
    { "year": 1986, "month": 3, "variance": 0.439 },
    { "year": 1986, "month": 4, "variance": 0.517 },
    { "year": 1986, "month": 5, "variance": 0.228 },
    { "year": 1986, "month": 6, "variance": -0.069 },
    { "year": 1986, "month": 7, "variance": -0.105 },
    { "year": 1986, "month": 8, "variance": 0.029 },
    { "year": 1986, "month": 9, "variance": -0.322 },
    { "year": 1986, "month": 10, "variance": 0.031 },
    { "year": 1986, "month": 11, "variance": -0.175 },
    { "year": 1986, "month": 12, "variance": 0.137 },
    { "year": 1987, "month": 1, "variance": 0.531 },
    { "year": 1987, "month": 2, "variance": 0.918 },
    { "year": 1987, "month": 3, "variance": -0.091 },
    { "year": 1987, "month": 4, "variance": 0.235 },
    { "year": 1987, "month": 5, "variance": 0.147 },
    { "year": 1987, "month": 6, "variance": 0.396 },
    { "year": 1987, "month": 7, "variance": 0.482 },
    { "year": 1987, "month": 8, "variance": -0.027 },
    { "year": 1987, "month": 9, "variance": 0.327 },
    { "year": 1987, "month": 10, "variance": 0.352 },
    { "year": 1987, "month": 11, "variance": -0.044 },
    { "year": 1987, "month": 12, "variance": 0.846 },
    { "year": 1988, "month": 1, "variance": 0.857 },
    { "year": 1988, "month": 2, "variance": 0.226 },
    { "year": 1988, "month": 3, "variance": 0.611 },
    { "year": 1988, "month": 4, "variance": 0.636 },
    { "year": 1988, "month": 5, "variance": 0.483 },
    { "year": 1988, "month": 6, "variance": 0.559 },
    { "year": 1988, "month": 7, "variance": 0.392 },
    { "year": 1988, "month": 8, "variance": 0.625 },
    { "year": 1988, "month": 9, "variance": 0.562 },
    { "year": 1988, "month": 10, "variance": 0.742 },
    { "year": 1988, "month": 11, "variance": 0.210 },
    { "year": 1988, "month": 12, "variance": 0.725 },
    { "year": 1989, "month": 1, "variance": 0.115 },
    { "year": 1989, "month": 2, "variance": 0.414 },
    { "year": 1989, "month": 3, "variance": 0.466 },
    { "year": 1989, "month": 4, "variance": 0.334 },
    { "year": 1989, "month": 5, "variance": -0.092 },
    { "year": 1989, "month": 6, "variance": -0.089 },
    { "year": 1989, "month": 7, "variance": 0.191 },
    { "year": 1989, "month": 8, "variance": 0.214 },
    { "year": 1989, "month": 9, "variance": 0.289 },
    { "year": 1989, "month": 10, "variance": 0.502 },
    { "year": 1989, "month": 11, "variance": 0.092 },
    { "year": 1989, "month": 12, "variance": 0.780 },
    { "year": 1990, "month": 1, "variance": 0.638 },
    { "year": 1990, "month": 2, "variance": 0.467 },
    { "year": 1990, "month": 3, "variance": 1.407 },
    { "year": 1990, "month": 4, "variance": 0.798 },
    { "year": 1990, "month": 5, "variance": 0.442 },
    { "year": 1990, "month": 6, "variance": 0.369 },
    { "year": 1990, "month": 7, "variance": 0.373 },
    { "year": 1990, "month": 8, "variance": 0.179 },
    { "year": 1990, "month": 9, "variance": 0.073 },
    { "year": 1990, "month": 10, "variance": 0.627 },
    { "year": 1990, "month": 11, "variance": 0.822 },
    { "year": 1990, "month": 12, "variance": 0.788 },
    { "year": 1991, "month": 1, "variance": 0.590 },
    { "year": 1991, "month": 2, "variance": 0.839 },
    { "year": 1991, "month": 3, "variance": 0.242 },
    { "year": 1991, "month": 4, "variance": 0.869 },
    { "year": 1991, "month": 5, "variance": 0.234 },
    { "year": 1991, "month": 6, "variance": 0.720 },
    { "year": 1991, "month": 7, "variance": 0.582 },
    { "year": 1991, "month": 8, "variance": 0.407 },
    { "year": 1991, "month": 9, "variance": 0.556 },
    { "year": 1991, "month": 10, "variance": 0.498 },
    { "year": 1991, "month": 11, "variance": 0.345 },
    { "year": 1991, "month": 12, "variance": 0.406 },
    { "year": 1992, "month": 1, "variance": 0.966 },
    { "year": 1992, "month": 2, "variance": 0.715 },
    { "year": 1992, "month": 3, "variance": 0.632 },
    { "year": 1992, "month": 4, "variance": 0.206 },
    { "year": 1992, "month": 5, "variance": 0.145 },
    { "year": 1992, "month": 6, "variance": 0.048 },
    { "year": 1992, "month": 7, "variance": -0.269 },
    { "year": 1992, "month": 8, "variance": -0.150 },
    { "year": 1992, "month": 9, "variance": -0.454 },
    { "year": 1992, "month": 10, "variance": 0.091 },
    { "year": 1992, "month": 11, "variance": -0.195 },
    { "year": 1992, "month": 12, "variance": 0.440 },
    { "year": 1993, "month": 1, "variance": 0.701 },
    { "year": 1993, "month": 2, "variance": 0.533 },
    { "year": 1993, "month": 3, "variance": 0.602 },
    { "year": 1993, "month": 4, "variance": 0.312 },
    { "year": 1993, "month": 5, "variance": 0.081 },
    { "year": 1993, "month": 6, "variance": -0.014 },
    { "year": 1993, "month": 7, "variance": 0.184 },
    { "year": 1993, "month": 8, "variance": -0.085 },
    { "year": 1993, "month": 9, "variance": -0.200 },
    { "year": 1993, "month": 10, "variance": 0.357 },
    { "year": 1993, "month": 11, "variance": -0.358 },
    { "year": 1993, "month": 12, "variance": 0.400 },
    { "year": 1994, "month": 1, "variance": 0.407 },
    { "year": 1994, "month": 2, "variance": -0.403 },
    { "year": 1994, "month": 3, "variance": 0.397 },
    { "year": 1994, "month": 4, "variance": 0.643 },
    { "year": 1994, "month": 5, "variance": 0.293 },
    { "year": 1994, "month": 6, "variance": 0.621 },
    { "year": 1994, "month": 7, "variance": 0.239 },
    { "year": 1994, "month": 8, "variance": 0.052 },
    { "year": 1994, "month": 9, "variance": 0.402 },
    { "year": 1994, "month": 10, "variance": 0.773 },
    { "year": 1994, "month": 11, "variance": 0.695 },
    { "year": 1994, "month": 12, "variance": 0.477 },
    { "year": 1995, "month": 1, "variance": 0.933 },
    { "year": 1995, "month": 2, "variance": 1.448 },
    { "year": 1995, "month": 3, "variance": 0.633 },
    { "year": 1995, "month": 4, "variance": 0.606 },
    { "year": 1995, "month": 5, "variance": 0.191 },
    { "year": 1995, "month": 6, "variance": 0.643 },
    { "year": 1995, "month": 7, "variance": 0.715 },
    { "year": 1995, "month": 8, "variance": 0.706 },
    { "year": 1995, "month": 9, "variance": 0.457 },
    { "year": 1995, "month": 10, "variance": 0.857 },
    { "year": 1995, "month": 11, "variance": 0.660 },
    { "year": 1995, "month": 12, "variance": 0.492 },
    { "year": 1996, "month": 1, "variance": 0.259 },
    { "year": 1996, "month": 2, "variance": 0.805 },
    { "year": 1996, "month": 3, "variance": 0.198 },
    { "year": 1996, "month": 4, "variance": 0.316 },
    { "year": 1996, "month": 5, "variance": 0.211 },
    { "year": 1996, "month": 6, "variance": 0.133 },
    { "year": 1996, "month": 7, "variance": 0.416 },
    { "year": 1996, "month": 8, "variance": 0.677 },
    { "year": 1996, "month": 9, "variance": 0.168 },
    { "year": 1996, "month": 10, "variance": 0.274 },
    { "year": 1996, "month": 11, "variance": 0.458 },
    { "year": 1996, "month": 12, "variance": 0.692 },
    { "year": 1997, "month": 1, "variance": 0.563 },
    { "year": 1997, "month": 2, "variance": 0.549 },
    { "year": 1997, "month": 3, "variance": 0.660 },
    { "year": 1997, "month": 4, "variance": 0.490 },
    { "year": 1997, "month": 5, "variance": 0.203 },
    { "year": 1997, "month": 6, "variance": 0.596 },
    { "year": 1997, "month": 7, "variance": 0.157 },
    { "year": 1997, "month": 8, "variance": 0.331 },
    { "year": 1997, "month": 9, "variance": 0.563 },
    { "year": 1997, "month": 10, "variance": 0.857 },
    { "year": 1997, "month": 11, "variance": 0.746 },
    { "year": 1997, "month": 12, "variance": 0.788 },
    { "year": 1998, "month": 1, "variance": 0.758 },
    { "year": 1998, "month": 2, "variance": 1.604 },
    { "year": 1998, "month": 3, "variance": 0.684 },
    { "year": 1998, "month": 4, "variance": 1.002 },
    { "year": 1998, "month": 5, "variance": 0.903 },
    { "year": 1998, "month": 6, "variance": 0.988 },
    { "year": 1998, "month": 7, "variance": 0.919 },
    { "year": 1998, "month": 8, "variance": 0.949 },
    { "year": 1998, "month": 9, "variance": 0.542 },
    { "year": 1998, "month": 10, "variance": 0.700 },
    { "year": 1998, "month": 11, "variance": 0.314 },
    { "year": 1998, "month": 12, "variance": 1.032 },
    { "year": 1999, "month": 1, "variance": 0.943 },
    { "year": 1999, "month": 2, "variance": 1.474 },
    { "year": 1999, "month": 3, "variance": 0.183 },
    { "year": 1999, "month": 4, "variance": 0.459 },
    { "year": 1999, "month": 5, "variance": 0.308 },
    { "year": 1999, "month": 6, "variance": 0.494 },
    { "year": 1999, "month": 7, "variance": 0.458 },
    { "year": 1999, "month": 8, "variance": 0.419 },
    { "year": 1999, "month": 9, "variance": 0.589 },
    { "year": 1999, "month": 10, "variance": 0.737 },
    { "year": 1999, "month": 11, "variance": 0.501 },
    { "year": 1999, "month": 12, "variance": 0.934 },
    { "year": 2000, "month": 1, "variance": 0.352 },
    { "year": 2000, "month": 2, "variance": 0.948 },
    { "year": 2000, "month": 3, "variance": 0.865 },
    { "year": 2000, "month": 4, "variance": 1.185 },
    { "year": 2000, "month": 5, "variance": 0.491 },
    { "year": 2000, "month": 6, "variance": 0.542 },
    { "year": 2000, "month": 7, "variance": 0.425 },
    { "year": 2000, "month": 8, "variance": 0.580 },
    { "year": 2000, "month": 9, "variance": 0.420 },
    { "year": 2000, "month": 10, "variance": 0.231 },
    { "year": 2000, "month": 11, "variance": 0.226 },
    { "year": 2000, "month": 12, "variance": 0.233 },
    { "year": 2001, "month": 1, "variance": 0.734 },
    { "year": 2001, "month": 2, "variance": 0.501 },
    { "year": 2001, "month": 3, "variance": 0.872 },
    { "year": 2001, "month": 4, "variance": 0.862 },
    { "year": 2001, "month": 5, "variance": 0.872 },
    { "year": 2001, "month": 6, "variance": 0.556 },
    { "year": 2001, "month": 7, "variance": 0.732 },
    { "year": 2001, "month": 8, "variance": 0.502 },
    { "year": 2001, "month": 9, "variance": 0.615 },
    { "year": 2001, "month": 10, "variance": 0.677 },
    { "year": 2001, "month": 11, "variance": 1.232 },
    { "year": 2001, "month": 12, "variance": 0.880 },
    { "year": 2002, "month": 1, "variance": 1.424 },
    { "year": 2002, "month": 2, "variance": 1.481 },
    { "year": 2002, "month": 3, "variance": 1.431 },
    { "year": 2002, "month": 4, "variance": 0.858 },
    { "year": 2002, "month": 5, "variance": 0.863 },
    { "year": 2002, "month": 6, "variance": 0.528 },
    { "year": 2002, "month": 7, "variance": 0.921 },
    { "year": 2002, "month": 8, "variance": 0.634 },
    { "year": 2002, "month": 9, "variance": 0.802 },
    { "year": 2002, "month": 10, "variance": 0.725 },
    { "year": 2002, "month": 11, "variance": 0.806 },
    { "year": 2002, "month": 12, "variance": 0.409 },
    { "year": 2003, "month": 1, "variance": 1.384 },
    { "year": 2003, "month": 2, "variance": 0.879 },
    { "year": 2003, "month": 3, "variance": 0.720 },
    { "year": 2003, "month": 4, "variance": 0.784 },
    { "year": 2003, "month": 5, "variance": 0.769 },
    { "year": 2003, "month": 6, "variance": 0.463 },
    { "year": 2003, "month": 7, "variance": 0.558 },
    { "year": 2003, "month": 8, "variance": 0.756 },
    { "year": 2003, "month": 9, "variance": 0.772 },
    { "year": 2003, "month": 10, "variance": 1.168 },
    { "year": 2003, "month": 11, "variance": 0.626 },
    { "year": 2003, "month": 12, "variance": 1.516 },
    { "year": 2004, "month": 1, "variance": 0.918 },
    { "year": 2004, "month": 2, "variance": 1.284 },
    { "year": 2004, "month": 3, "variance": 0.990 },
    { "year": 2004, "month": 4, "variance": 0.869 },
    { "year": 2004, "month": 5, "variance": 0.181 },
    { "year": 2004, "month": 6, "variance": 0.331 },
    { "year": 2004, "month": 7, "variance": -0.098 },
    { "year": 2004, "month": 8, "variance": 0.267 },
    { "year": 2004, "month": 9, "variance": 0.528 },
    { "year": 2004, "month": 10, "variance": 0.878 },
    { "year": 2004, "month": 11, "variance": 1.223 },
    { "year": 2004, "month": 12, "variance": 0.638 },
    { "year": 2005, "month": 1, "variance": 1.211 },
    { "year": 2005, "month": 2, "variance": 0.716 },
    { "year": 2005, "month": 3, "variance": 1.223 },
    { "year": 2005, "month": 4, "variance": 1.246 },
    { "year": 2005, "month": 5, "variance": 0.851 },
    { "year": 2005, "month": 6, "variance": 0.940 },
    { "year": 2005, "month": 7, "variance": 0.779 },
    { "year": 2005, "month": 8, "variance": 0.602 },
    { "year": 2005, "month": 9, "variance": 1.093 },
    { "year": 2005, "month": 10, "variance": 1.333 },
    { "year": 2005, "month": 11, "variance": 1.314 },
    { "year": 2005, "month": 12, "variance": 1.257 },
    { "year": 2006, "month": 1, "variance": 0.709 },
    { "year": 2006, "month": 2, "variance": 1.235 },
    { "year": 2006, "month": 3, "variance": 0.999 },
    { "year": 2006, "month": 4, "variance": 0.691 },
    { "year": 2006, "month": 5, "variance": 0.398 },
    { "year": 2006, "month": 6, "variance": 0.884 },
    { "year": 2006, "month": 7, "variance": 0.626 },
    { "year": 2006, "month": 8, "variance": 0.990 },
    { "year": 2006, "month": 9, "variance": 0.731 },
    { "year": 2006, "month": 10, "variance": 1.044 },
    { "year": 2006, "month": 11, "variance": 0.858 },
    { "year": 2006, "month": 12, "variance": 1.358 },
    { "year": 2007, "month": 1, "variance": 1.989 },
    { "year": 2007, "month": 2, "variance": 1.032 },
    { "year": 2007, "month": 3, "variance": 1.167 },
    { "year": 2007, "month": 4, "variance": 1.472 },
    { "year": 2007, "month": 5, "variance": 1.131 },
    { "year": 2007, "month": 6, "variance": 0.760 },
    { "year": 2007, "month": 7, "variance": 0.801 },
    { "year": 2007, "month": 8, "variance": 0.822 },
    { "year": 2007, "month": 9, "variance": 0.801 },
    { "year": 2007, "month": 10, "variance": 1.082 },
    { "year": 2007, "month": 11, "variance": 1.000 },
    { "year": 2007, "month": 12, "variance": 0.903 },
    { "year": 2008, "month": 1, "variance": 0.277 },
    { "year": 2008, "month": 2, "variance": 0.387 },
    { "year": 2008, "month": 3, "variance": 1.595 },
    { "year": 2008, "month": 4, "variance": 0.915 },
    { "year": 2008, "month": 5, "variance": 0.651 },
    { "year": 2008, "month": 6, "variance": 0.602 },
    { "year": 2008, "month": 7, "variance": 0.753 },
    { "year": 2008, "month": 8, "variance": 0.433 },
    { "year": 2008, "month": 9, "variance": 0.656 },
    { "year": 2008, "month": 10, "variance": 1.143 },
    { "year": 2008, "month": 11, "variance": 1.122 },
    { "year": 2008, "month": 12, "variance": 0.760 },
    { "year": 2009, "month": 1, "variance": 1.086 },
    { "year": 2009, "month": 2, "variance": 0.880 },
    { "year": 2009, "month": 3, "variance": 0.756 },
    { "year": 2009, "month": 4, "variance": 1.005 },
    { "year": 2009, "month": 5, "variance": 0.727 },
    { "year": 2009, "month": 6, "variance": 0.653 },
    { "year": 2009, "month": 7, "variance": 0.795 },
    { "year": 2009, "month": 8, "variance": 0.728 },
    { "year": 2009, "month": 9, "variance": 1.019 },
    { "year": 2009, "month": 10, "variance": 0.882 },
    { "year": 2009, "month": 11, "variance": 0.930 },
    { "year": 2009, "month": 12, "variance": 0.680 },
    { "year": 2010, "month": 1, "variance": 1.145 },
    { "year": 2010, "month": 2, "variance": 1.189 },
    { "year": 2010, "month": 3, "variance": 1.424 },
    { "year": 2010, "month": 4, "variance": 1.304 },
    { "year": 2010, "month": 5, "variance": 1.009 },
    { "year": 2010, "month": 6, "variance": 0.905 },
    { "year": 2010, "month": 7, "variance": 0.795 },
    { "year": 2010, "month": 8, "variance": 0.837 },
    { "year": 2010, "month": 9, "variance": 0.726 },
    { "year": 2010, "month": 10, "variance": 1.206 },
    { "year": 2010, "month": 11, "variance": 1.408 },
    { "year": 2010, "month": 12, "variance": 0.670 },
    { "year": 2011, "month": 1, "variance": 0.716 },
    { "year": 2011, "month": 2, "variance": 0.551 },
    { "year": 2011, "month": 3, "variance": 0.789 },
    { "year": 2011, "month": 4, "variance": 1.121 },
    { "year": 2011, "month": 5, "variance": 0.592 },
    { "year": 2011, "month": 6, "variance": 0.840 },
    { "year": 2011, "month": 7, "variance": 1.054 },
    { "year": 2011, "month": 8, "variance": 1.084 },
    { "year": 2011, "month": 9, "variance": 0.786 },
    { "year": 2011, "month": 10, "variance": 1.106 },
    { "year": 2011, "month": 11, "variance": 0.735 },
    { "year": 2011, "month": 12, "variance": 1.052 },
    { "year": 2012, "month": 1, "variance": 0.568 },
    { "year": 2012, "month": 2, "variance": 0.456 },
    { "year": 2012, "month": 3, "variance": 0.703 },
    { "year": 2012, "month": 4, "variance": 1.310 },
    { "year": 2012, "month": 5, "variance": 1.187 },
    { "year": 2012, "month": 6, "variance": 0.935 },
    { "year": 2012, "month": 7, "variance": 0.668 },
    { "year": 2012, "month": 8, "variance": 0.785 },
    { "year": 2012, "month": 9, "variance": 0.930 },
    { "year": 2012, "month": 10, "variance": 1.184 },
    { "year": 2012, "month": 11, "variance": 1.062 },
    { "year": 2012, "month": 12, "variance": 0.473 },
    { "year": 2013, "month": 1, "variance": 1.090 },
    { "year": 2013, "month": 2, "variance": 1.022 },
    { "year": 2013, "month": 3, "variance": 0.936 },
    { "year": 2013, "month": 4, "variance": 0.698 },
    { "year": 2013, "month": 5, "variance": 0.804 },
    { "year": 2013, "month": 6, "variance": 1.023 },
    { "year": 2013, "month": 7, "variance": 0.597 },
    { "year": 2013, "month": 8, "variance": 0.824 },
    { "year": 2013, "month": 9, "variance": 1.019 },
    { "year": 2013, "month": 10, "variance": 1.009 },
    { "year": 2013, "month": 11, "variance": 1.347 },
    { "year": 2013, "month": 12, "variance": 1.106 },
    { "year": 2014, "month": 1, "variance": 1.132 },
    { "year": 2014, "month": 2, "variance": 0.290 },
    { "year": 2014, "month": 3, "variance": 1.061 },
    { "year": 2014, "month": 4, "variance": 1.230 },
    { "year": 2014, "month": 5, "variance": 1.187 },
    { "year": 2014, "month": 6, "variance": 0.775 },
    { "year": 2014, "month": 7, "variance": 0.442 },
    { "year": 2014, "month": 8, "variance": 0.940 },
    { "year": 2014, "month": 9, "variance": 0.952 },
    { "year": 2014, "month": 10, "variance": 1.100 },
    { "year": 2014, "month": 11, "variance": 0.632 },
    { "year": 2014, "month": 12, "variance": 1.229 },
    { "year": 2015, "month": 1, "variance": 1.291 },
    { "year": 2015, "month": 2, "variance": 1.450 },
    { "year": 2015, "month": 3, "variance": 1.414 },
    { "year": 2015, "month": 4, "variance": 0.951 },
    { "year": 2015, "month": 5, "variance": 0.917 },
    { "year": 2015, "month": 6, "variance": 0.977 },
    { "year": 2015, "month": 7, "variance": 0.631 },
    { "year": 2015, "month": 8, "variance": 0.823 },
    { "year": 2015, "month": 9, "variance": 0.870}
  ]
}