YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.53914e+01 3.84779e-01 136 2000 3 2.55764e+01 6.50712e-01 739 2000 4 2.59703e+01 5.41710e-01 768 2000 5 2.72648e+01 9.11285e-01 530 2000 6 2.65355e+01 7.46171e-01 227 2000 7 2.75645e+01 5.77339e-01 439 2000 8 2.81410e+01 7.18706e-01 380 2000 9 2.82727e+01 5.63596e-01 430 2000 10 2.85161e+01 3.85466e-01 473 2000 11 2.79524e+01 6.58288e-01 686 2000 12 2.69653e+01 2.69142e-01 739 2001 1 2.60384e+01 3.16895e-01 463 2001 2 2.58889e+01 4.89365e-01 771 2001 3 2.58161e+01 5.96768e-01 517 2001 4 2.65660e+01 7.06171e-01 605 2001 5 2.68115e+01 8.07962e-01 470 2001 6 2.67939e+01 5.60271e-01 215 2001 7 2.74924e+01 7.28986e-01 793 2001 8 2.77400e+01 8.22569e-01 701 2001 9 2.88006e+01 4.49334e-01 608 2001 10 2.83718e+01 1.06637e+00 376 2001 11 2.77966e+01 8.83816e-01 520 2001 12 2.73949e+01 8.70120e-01 511 2002 1 2.68107e+01 4.36833e-01 1004 2002 2 2.63523e+01 4.68778e-01 600 2002 3 2.61772e+01 3.55948e-01 715 2002 4 2.61759e+01 4.12182e-01 572 2002 5 2.68233e+01 6.32025e-01 338 2002 6 2.69864e+01 8.61848e-01 304 2002 7 2.75924e+01 7.62331e-01 1547 2002 8 2.82863e+01 6.11820e-01 1435 2002 9 2.86298e+01 6.31873e-01 1595 2002 10 2.85386e+01 6.99855e-01 2862 2002 11 2.80705e+01 7.76293e-01 3055 2002 12 2.74150e+01 5.46730e-01 3079 2003 1 2.68668e+01 5.36790e-01 3033 2003 2 2.63873e+01 5.22163e-01 2707 2003 3 2.66338e+01 7.26832e-01 3067 2003 4 2.69201e+01 7.77279e-01 1901 2003 5 2.69945e+01 8.20677e-01 1699 2003 6 2.71368e+01 9.56558e-01 835 2003 7 2.74396e+01 6.50827e-01 833 2003 8 2.78394e+01 6.96982e-01 1569 2003 9 2.87813e+01 5.59171e-01 1839 2003 10 2.89531e+01 6.05619e-01 1813 2003 11 2.81287e+01 9.56615e-01 1583 2003 12 2.69694e+01 8.45209e-01 1965 2004 1 2.64065e+01 5.80200e-01 2662 2004 2 2.64643e+01 4.67672e-01 2337 2004 3 2.61843e+01 5.10181e-01 2719 2004 4 2.69332e+01 8.56888e-01 2734 2004 5 2.70668e+01 6.35893e-01 1779 2004 6 2.71845e+01 9.48574e-01 1414 2004 7 2.74468e+01 1.06812e+00 1829 2004 8 2.77950e+01 9.61670e-01 2101 2004 9 2.86283e+01 5.85179e-01 1462 2004 10 2.87799e+01 7.42791e-01 2295 2004 11 2.74278e+01 6.91502e-01 2136 2004 12 2.67526e+01 6.10992e-01 3137 2005 1 2.62181e+01 5.59406e-01 2378 2005 2 2.54042e+01 5.53052e-01 3163 2005 3 2.61024e+01 6.45583e-01 3465 2005 4 2.74209e+01 9.04415e-01 2014 2005 5 2.80405e+01 7.76675e-01 1525 2005 6 2.80912e+01 9.27751e-01 1184 2005 7 2.84302e+01 7.70487e-01 1359 2005 8 2.88489e+01 9.08612e-01 1197 2005 9 2.91147e+01 8.88498e-01 1677 2005 10 2.85155e+01 6.59035e-01 839 2005 11 2.83743e+01 7.06445e-01 2157 2005 12 2.72851e+01 6.88963e-01 2670 2006 1 2.67092e+01 6.34571e-01 2465 2006 2 2.63901e+01 5.50777e-01 2738 2006 3 2.63313e+01 4.76909e-01 2411 2006 4 2.70583e+01 9.09797e-01 2400 2006 5 2.75408e+01 7.68615e-01 2165 2006 6 2.79981e+01 8.72823e-01 1713 2006 7 2.78799e+01 1.07470e+00 1523 2006 8 2.81503e+01 6.87665e-01 2066 2006 9 2.88986e+01 7.11184e-01 1900 2006 10 2.88550e+01 1.01184e+00 2003 2006 11 2.85758e+01 5.78327e-01 2850 2006 12 2.76549e+01 6.81237e-01 3105 2007 1 2.68566e+01 4.01948e-01 3327 2007 2 2.65200e+01 6.25249e-01 2519 2007 3 2.63733e+01 7.24404e-01 2079 2007 4 2.65187e+01 8.55589e-01 2705 2007 5 2.78893e+01 1.01088e+00 1749 2007 6 2.78600e+01 1.04103e+00 1400 2007 7 2.78784e+01 8.27242e-01 1489 2007 8 2.83592e+01 5.21717e-01 1194 2007 9 2.88141e+01 7.37958e-01 1966 2007 10 2.89566e+01 6.08841e-01 1190 2007 11 2.79170e+01 8.17437e-01 2143 2007 12 2.72100e+01 4.80991e-01 2950 2008 1 2.66380e+01 6.23833e-01 3240 2008 2 2.60320e+01 4.74801e-01 2938 2008 3 2.59810e+01 5.24442e-01 2606 2008 4 2.63226e+01 8.94209e-01 2480 2008 5 2.70739e+01 8.32460e-01 2040 2008 6 2.74693e+01 8.54973e-01 1058 2008 7 2.77610e+01 5.15812e-01 1810 2008 8 2.84886e+01 7.16815e-01 1819 2008 9 2.85227e+01 9.22320e-01 1477 2008 10 2.85283e+01 6.74542e-01 2689 2008 11 2.82502e+01 6.56352e-01 2041 2008 12 2.65590e+01 8.78952e-01 2898 2009 1 2.59792e+01 5.32742e-01 3236 2009 2 2.59260e+01 5.19612e-01 2040 2009 3 2.57150e+01 6.29650e-01 2302 2009 4 2.61312e+01 6.08688e-01 2227 2009 5 2.67703e+01 1.25867e+00 1532 2009 6 2.79540e+01 6.48539e-01 1286 2009 7 2.79546e+01 6.97028e-01 1326 2009 8 2.80413e+01 6.82238e-01 1832 2009 9 2.89246e+01 5.96577e-01 2148 2009 10 2.88031e+01 6.62385e-01 2711 2009 11 2.79898e+01 7.99650e-01 2600 2009 12 2.76250e+01 5.51331e-01 3238 2010 1 2.69889e+01 6.43186e-01 1890 2010 2 2.68794e+01 5.53735e-01 2232 2010 3 2.71409e+01 9.17574e-01 2495 2010 4 2.72540e+01 7.28285e-01 1931 2010 5 2.77906e+01 6.99738e-01 1417 2010 6 2.83841e+01 8.64184e-01 1539 2010 7 2.83114e+01 8.22214e-01 1088 2010 8 2.91470e+01 8.47720e-01 2144 2010 9 2.93705e+01 7.81231e-01 1609 2010 10 2.90337e+01 7.57481e-01 2364 2010 11 2.75692e+01 7.74243e-01 1214 2010 12 2.69621e+01 8.43821e-01 1463 2011 1 2.60065e+01 6.77348e-01 2236 2011 2 2.60928e+01 5.82774e-01 2731 2011 3 2.59540e+01 5.73827e-01 2853 2011 4 2.61814e+01 7.49215e-01 2864 2011 5 2.70792e+01 1.01621e+00 1683 2011 6 2.84302e+01 5.79532e-01 1533 2011 7 2.83192e+01 6.63938e-01 2124 2011 8 2.80618e+01 8.24759e-01 1851 2011 9 2.87938e+01 8.96654e-01 1915 2011 10 2.85870e+01 7.14341e-01 2085 2011 11 2.77629e+01 6.08066e-01 1951 2011 12 2.74551e+01 6.15690e-01 2973 2012 1 2.64300e+01 6.01820e-01 3184 2012 2 2.58555e+01 6.32730e-01 2470 2012 3 2.61025e+01 4.32895e-01 2517 2012 4 2.66261e+01 8.04009e-01 2056 2012 5 2.73582e+01 7.28513e-01 1559 2012 6 2.76429e+01 6.80555e-01 2158 2012 7 2.76409e+01 7.08317e-01 1569 2012 8 2.80052e+01 6.69402e-01 1266 2012 9 2.90387e+01 5.90564e-01 2421 2012 10 2.88798e+01 8.15198e-01 2190 2012 11 2.86521e+01 6.89538e-01 2332 2012 12 2.77835e+01 6.00592e-01 2512 2013 1 2.66420e+01 5.60903e-01 2664 2013 2 2.63219e+01 4.66019e-01 2501 2013 3 2.62152e+01 7.31663e-01 2732 2013 4 2.67191e+01 8.06166e-01 2553 2013 5 2.76202e+01 8.54619e-01 1770 2013 6 2.66312e+01 1.20681e+00 1064 2013 7 2.78556e+01 7.14921e-01 2050 2013 8 2.85006e+01 5.90883e-01 1567 2013 9 2.90768e+01 6.60745e-01 2170 2013 10 2.89819e+01 9.41789e-01 1784 2013 11 2.81681e+01 6.67210e-01 2027 2013 12 2.70397e+01 5.31493e-01 3043 2014 1 2.66633e+01 5.20673e-01 3524 2014 2 2.63829e+01 6.12257e-01 2800 2014 3 2.66234e+01 7.98523e-01 2663 2014 4 2.69041e+01 7.33843e-01 2525 2014 5 2.73681e+01 6.39497e-01 1742 2014 6 2.72043e+01 6.46234e-01 1325 2014 7 2.74572e+01 8.93383e-01 1141 2014 8 2.79531e+01 7.83849e-01 1092 2014 9 2.87898e+01 7.59647e-01 1712 2014 10 2.88642e+01 6.08334e-01 2741 2014 11 2.83559e+01 7.98688e-01 2477 2014 12 2.75068e+01 6.30739e-01 2738 2015 1 2.68143e+01 4.37768e-01 2997 2015 2 2.66648e+01 5.13947e-01 2170 2015 3 2.66241e+01 6.52595e-01 2845 2015 4 2.67574e+01 5.91352e-01 2418 2015 5 2.69240e+01 8.35517e-01 1724 2015 6 2.72337e+01 1.22171e+00 1079 2015 7 2.73597e+01 7.96796e-01 1621 2015 8 2.80488e+01 6.43082e-01 2223 2015 9 2.86314e+01 6.74841e-01 2424 2015 10 2.93716e+01 8.05686e-01 1819 2015 11 2.86521e+01 7.55723e-01 1674 2015 12 2.75306e+01 4.75918e-01 2185 2016 1 2.68362e+01 6.16279e-01 2532 2016 2 2.67361e+01 7.17148e-01 2226 2016 3 2.66245e+01 5.41951e-01 2598 2016 4 2.72039e+01 7.19352e-01 1965 2016 5 2.77027e+01 9.88147e-01 1618 2016 6 2.77763e+01 7.88993e-01 1408 2016 7 2.79370e+01 8.37356e-01 1641 2016 8 2.88464e+01 4.25166e-01 1756 2016 9 2.93458e+01 6.77168e-01 2328 2016 10 2.88826e+01 9.20125e-01 1817 2016 11 2.85246e+01 5.80113e-01 1257 2016 12 2.76742e+01 6.39154e-01 2854 2017 1 2.66876e+01 7.08906e-01 2504 2017 2 2.62038e+01 6.64203e-01 2573 2017 3 2.66660e+01 5.36516e-01 1899 2017 4 2.69565e+01 7.04199e-01 2390 2017 5 2.74837e+01 5.76194e-01 1562 2017 6 2.81698e+01 5.06679e-01 1393 2017 7 2.84425e+01 8.16936e-01 1989 2017 8 2.87484e+01 6.70272e-01 2160 2017 9 2.90847e+01 1.12469e+00 1023 2017 10 2.87475e+01 5.36587e-01 1939 2017 11 2.82202e+01 7.53256e-01 1323 2017 12 2.76942e+01 6.64466e-01 3251 2018 1 2.68341e+01 8.21775e-01 2132 2018 2 2.64186e+01 5.19117e-01 2714 2018 3 2.62616e+01 6.35228e-01 2842 2018 4 2.69510e+01 6.57289e-01 2388 2018 5 2.71569e+01 6.27869e-01 2071 2018 6 2.72274e+01 9.02312e-01 1277 2018 7 2.73448e+01 8.84108e-01 755 2018 8 2.82305e+01 7.24384e-01 2006 2018 9 2.85434e+01 7.35987e-01 1675 2018 10 2.83685e+01 5.75226e-01 2105 2018 11 2.79329e+01 8.37379e-01 2775 2018 12 2.72761e+01 6.99210e-01 3449 2019 1 2.64755e+01 5.11187e-01 2995 2019 2 2.63224e+01 4.70826e-01 1990 2019 3 2.64833e+01 5.71785e-01 2516 2019 4 2.67027e+01 5.42010e-01 2257 2019 5 2.72230e+01 6.90579e-01 1268 2019 6 2.75540e+01 1.00894e+00 1651 2019 7 2.78158e+01 8.63658e-01 1766 2019 8 2.83720e+01 7.86059e-01 2864 2019 9 2.91130e+01 8.02531e-01 1954 2019 10 2.90332e+01 6.94821e-01 2574 2019 11 2.86904e+01 7.03962e-01 2763 2019 12 2.80760e+01 7.51491e-01 3045 2020 1 2.72566e+01 5.05296e-01 2544 2020 2 2.68108e+01 6.85060e-01 2236 2020 3 2.66429e+01 5.88485e-01 2575 2020 4 2.72347e+01 8.34659e-01 2432 2020 5 2.79445e+01 1.01779e+00 2411 2020 6 2.79779e+01 1.14956e+00 1626 2020 7 2.85758e+01 7.68381e-01 1743 2020 8 2.86755e+01 6.85265e-01 2018 2020 9 2.95586e+01 8.74512e-01 2565 2020 10 2.90659e+01 5.71451e-01 2220 2020 11 2.80569e+01 9.28923e-01 1328 2020 12 2.77426e+01 5.23097e-01 3318 2021 1 2.68485e+01 5.41264e-01 2553 2021 2 2.65275e+01 5.46184e-01 2737 2021 3 2.62430e+01 4.40660e-01 2828 2021 4 2.65929e+01 7.82370e-01 2037 2021 5 2.72753e+01 7.47251e-01 2442 2021 6 2.75808e+01 9.91061e-01 1161 2021 7 2.77517e+01 7.95470e-01 1666 2021 8 2.81401e+01 6.21752e-01 1529 2021 9 2.90314e+01 6.05459e-01 3059 2021 10 2.91606e+01 6.45168e-01 2487 2021 11 2.82666e+01 7.30758e-01 2446 2021 12 2.76862e+01 5.56584e-01 3472 2022 1 2.68784e+01 4.54082e-01 3364 2022 2 2.67955e+01 4.65367e-01 2365 2022 3 2.65910e+01 6.00549e-01 2792 2022 4 2.65373e+01 7.33683e-01 745 2022 5 2.71253e+01 9.89312e-01 2166 2022 6 2.78383e+01 7.94542e-01 1390 2022 7 2.78190e+01 8.08522e-01 1455 2022 8 2.85928e+01 6.79488e-01 2086 2022 9 2.89339e+01 1.09476e+00 1871 2022 10 2.90693e+01 6.90830e-01 1728 2022 11 2.79369e+01 6.60406e-01 2802 2022 12 2.69435e+01 6.63889e-01 3353 2023 1 2.66470e+01 5.93051e-01 3207 2023 2 2.60912e+01 6.82211e-01 2925 2023 3 2.62603e+01 6.14152e-01 3189 2023 4 2.68955e+01 6.78533e-01 2387 2023 5 2.81857e+01 5.88758e-01 1997 2023 6 2.84972e+01 7.12150e-01 1919 2023 7 2.84810e+01 8.15013e-01 1367 2023 8 2.90386e+01 7.05395e-01 1759 2023 9 2.96344e+01 9.05314e-01 2709 2023 10 2.99373e+01 7.52938e-01 2312 2023 11 2.87793e+01 8.94006e-01 1925 2023 12 2.79214e+01 6.32225e-01 2927 2024 1 2.72768e+01 4.59079e-01 2939 2024 2 2.68301e+01 5.36483e-01 2693 2024 3 2.68204e+01 6.37611e-01 3062 2024 4 2.71810e+01 2.34239e-01 305