YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.48578e+01 4.64430e-01 192 2000 3 2.52415e+01 7.34982e-01 671 2000 4 2.57636e+01 5.97375e-01 503 2000 5 2.70975e+01 7.94105e-01 595 2000 6 2.64323e+01 1.17235e+00 269 2000 7 2.72258e+01 7.49006e-01 413 2000 8 2.79007e+01 2.81839e-01 149 2000 9 2.86346e+01 6.74901e-01 693 2000 10 2.93812e+01 4.67347e-01 460 2000 11 2.81169e+01 5.96223e-01 528 2000 12 2.65139e+01 7.96885e-01 841 2001 1 2.61476e+01 6.82071e-01 372 2001 2 2.59088e+01 3.31346e-01 392 2001 3 2.55542e+01 8.69866e-01 723 2001 4 2.64138e+01 7.37324e-01 318 2001 5 2.67124e+01 9.53956e-01 527 2001 6 2.80264e+01 7.45495e-01 143 2001 7 2.75958e+01 9.28474e-01 433 2001 8 2.84100e+01 7.36912e-01 685 2001 9 2.85361e+01 7.79820e-01 584 2001 10 2.79196e+01 1.11266e+00 620 2001 11 2.77272e+01 8.56941e-01 405 2001 12 2.68165e+01 5.49635e-01 326 2002 1 2.61794e+01 5.67196e-01 506 2002 2 2.54498e+01 5.79809e-01 449 2002 3 2.58564e+01 7.40159e-01 375 2002 4 2.60615e+01 6.68705e-01 396 2002 5 2.67295e+01 6.72952e-01 556 2002 6 2.66913e+01 1.12051e+00 319 2002 7 2.78583e+01 7.85685e-01 1883 2002 8 2.86044e+01 6.17578e-01 1485 2002 9 2.87323e+01 8.68502e-01 1671 2002 10 2.88326e+01 6.59750e-01 2634 2002 11 2.83107e+01 8.45884e-01 3041 2002 12 2.68718e+01 7.82390e-01 2742 2003 1 2.64930e+01 6.57506e-01 2854 2003 2 2.62283e+01 6.76632e-01 2047 2003 3 2.65071e+01 7.04059e-01 2700 2003 4 2.70502e+01 8.20234e-01 1496 2003 5 2.74409e+01 7.51102e-01 2143 2003 6 2.69509e+01 8.41704e-01 1043 2003 7 2.70520e+01 8.97762e-01 1290 2003 8 2.80729e+01 8.32581e-01 1599 2003 9 2.88591e+01 8.82103e-01 2025 2003 10 2.89677e+01 8.71570e-01 2076 2003 11 2.77874e+01 9.07586e-01 1279 2003 12 2.67552e+01 6.42389e-01 1949 2004 1 2.60654e+01 6.50622e-01 2498 2004 2 2.60797e+01 5.74428e-01 2475 2004 3 2.57730e+01 7.22645e-01 2325 2004 4 2.71419e+01 7.59392e-01 2524 2004 5 2.65470e+01 9.98307e-01 943 2004 6 2.72853e+01 1.08895e+00 1207 2004 7 2.76195e+01 7.97119e-01 1625 2004 8 2.84347e+01 8.41642e-01 1914 2004 9 2.86278e+01 6.73470e-01 1685 2004 10 2.88165e+01 7.72683e-01 1577 2004 11 2.69788e+01 9.06693e-01 1750 2004 12 2.62218e+01 8.94932e-01 2059 2005 1 2.51876e+01 5.86360e-01 1596 2005 2 2.50055e+01 5.89285e-01 1893 2005 3 2.63892e+01 8.06042e-01 3474 2005 4 2.72398e+01 1.08235e+00 1881 2005 5 2.78094e+01 8.00311e-01 1179 2005 6 2.83597e+01 9.75528e-01 1981 2005 7 2.86637e+01 8.47897e-01 1467 2005 8 2.91776e+01 1.15848e+00 1415 2005 9 2.97382e+01 9.23750e-01 1969 2005 10 2.87736e+01 1.04013e+00 1544 2005 11 2.80593e+01 7.52643e-01 2378 2005 12 2.65609e+01 7.21285e-01 2381 2006 1 2.58188e+01 6.69248e-01 1866 2006 2 2.59335e+01 7.21351e-01 2056 2006 3 2.61612e+01 7.92395e-01 3331 2006 4 2.70290e+01 7.82936e-01 2323 2006 5 2.76144e+01 9.40869e-01 1793 2006 6 2.80857e+01 1.10155e+00 1416 2006 7 2.81130e+01 7.57020e-01 1600 2006 8 2.81236e+01 1.05208e+00 1787 2006 9 2.92224e+01 9.42967e-01 2293 2006 10 2.90708e+01 6.00914e-01 1190 2006 11 2.83355e+01 8.06421e-01 2531 2006 12 2.69241e+01 6.49280e-01 2155 2007 1 2.59216e+01 7.65840e-01 2589 2007 2 2.64505e+01 6.43732e-01 2730 2007 3 2.65304e+01 9.47288e-01 2446 2007 4 2.69090e+01 8.95781e-01 2026 2007 5 2.79614e+01 1.01072e+00 1778 2007 6 2.81041e+01 9.71050e-01 1494 2007 7 2.80540e+01 9.70214e-01 1576 2007 8 2.84915e+01 1.01363e+00 1351 2007 9 2.87880e+01 8.28579e-01 2106 2007 10 2.88164e+01 8.73404e-01 1560 2007 11 2.78854e+01 8.48906e-01 1671 2007 12 2.64968e+01 5.00764e-01 2342 2008 1 2.59489e+01 7.60187e-01 1985 2008 2 2.52888e+01 7.75059e-01 1813 2008 3 2.56650e+01 6.98973e-01 2192 2008 4 2.58346e+01 1.11781e+00 2467 2008 5 2.72644e+01 7.79318e-01 2679 2008 6 2.78323e+01 1.03962e+00 1539 2008 7 2.77729e+01 9.02628e-01 2076 2008 8 2.83795e+01 7.09156e-01 1820 2008 9 2.88695e+01 7.06195e-01 1003 2008 10 2.84942e+01 8.36937e-01 2113 2008 11 2.79038e+01 1.24796e+00 1667 2008 12 2.58922e+01 6.61942e-01 2309 2009 1 2.55216e+01 6.63378e-01 2566 2009 2 2.57370e+01 6.87374e-01 1320 2009 3 2.51941e+01 7.19247e-01 1709 2009 4 2.62631e+01 9.08441e-01 2604 2009 5 2.64257e+01 1.09934e+00 1134 2009 6 2.74177e+01 1.09056e+00 1382 2009 7 2.77044e+01 1.12125e+00 1178 2009 8 2.81507e+01 6.44968e-01 1899 2009 9 2.86941e+01 8.88356e-01 1824 2009 10 2.87792e+01 7.92102e-01 1962 2009 11 2.83944e+01 6.02670e-01 2393 2009 12 2.73617e+01 6.68901e-01 2161 2010 1 2.66508e+01 7.16136e-01 1949 2010 2 2.67241e+01 6.74809e-01 2563 2010 3 2.73197e+01 7.22294e-01 2602 2010 4 2.69411e+01 8.76629e-01 1711 2010 5 2.81490e+01 8.76198e-01 1257 2010 6 2.84058e+01 5.99746e-01 1120 2010 7 2.78000e+01 8.75932e-01 1360 2010 8 2.91438e+01 8.75313e-01 1870 2010 9 2.88553e+01 7.14373e-01 1643 2010 10 2.87348e+01 9.26037e-01 1948 2010 11 2.69408e+01 8.03111e-01 1569 2010 12 2.63783e+01 8.15601e-01 1486 2011 1 2.57876e+01 7.87385e-01 2210 2011 2 2.59022e+01 6.52397e-01 2427 2011 3 2.56359e+01 7.69759e-01 2741 2011 4 2.64281e+01 1.00325e+00 2694 2011 5 2.72758e+01 7.83297e-01 743 2011 6 2.81911e+01 7.59175e-01 1241 2011 7 2.81510e+01 7.37647e-01 1483 2011 8 2.81394e+01 8.07134e-01 1134 2011 9 2.84156e+01 6.87808e-01 1427 2011 10 2.85605e+01 8.73536e-01 2469 2011 11 2.78103e+01 7.39120e-01 1738 2011 12 2.66821e+01 8.17215e-01 2023 2012 1 2.57787e+01 8.01186e-01 1745 2012 2 2.56875e+01 8.28182e-01 2357 2012 3 2.58367e+01 8.45651e-01 1627 2012 4 2.64879e+01 1.07881e+00 1703 2012 5 2.69445e+01 1.03829e+00 1626 2012 6 2.78533e+01 7.91326e-01 1732 2012 7 2.78478e+01 8.10051e-01 1569 2012 8 2.80582e+01 5.48466e-01 1253 2012 9 2.89676e+01 7.76246e-01 2076 2012 10 2.91798e+01 5.26748e-01 1771 2012 11 2.84620e+01 8.14184e-01 1918 2012 12 2.69806e+01 9.43346e-01 1856 2013 1 2.60175e+01 5.28239e-01 1922 2013 2 2.57713e+01 6.32433e-01 2659 2013 3 2.62724e+01 7.97587e-01 2352 2013 4 2.67346e+01 8.13032e-01 2371 2013 5 2.72646e+01 8.24920e-01 1281 2013 6 2.71753e+01 6.64980e-01 654 2013 7 2.77896e+01 8.65239e-01 1880 2013 8 2.86340e+01 8.02505e-01 1725 2013 9 2.91468e+01 7.90252e-01 1889 2013 10 2.92807e+01 6.97163e-01 1706 2013 11 2.79595e+01 7.53732e-01 1940 2013 12 2.66039e+01 5.92767e-01 1904 2014 1 2.58947e+01 6.53503e-01 2888 2014 2 2.58722e+01 7.67726e-01 2563 2014 3 2.66125e+01 6.51262e-01 3199 2014 4 2.68372e+01 7.64258e-01 3041 2014 5 2.73107e+01 8.42535e-01 1372 2014 6 2.73264e+01 1.28795e+00 1518 2014 7 2.75205e+01 1.11978e+00 1359 2014 8 2.79570e+01 6.92918e-01 1546 2014 9 2.88025e+01 8.61676e-01 1640 2014 10 2.89606e+01 7.06529e-01 2556 2014 11 2.81645e+01 7.75674e-01 1958 2014 12 2.69293e+01 8.57813e-01 2634 2015 1 2.65145e+01 6.83996e-01 2543 2015 2 2.63934e+01 6.68040e-01 2155 2015 3 2.61206e+01 6.42169e-01 2576 2015 4 2.65565e+01 8.51810e-01 2238 2015 5 2.74258e+01 7.80267e-01 1907 2015 6 2.77636e+01 9.11834e-01 1400 2015 7 2.77563e+01 6.87068e-01 1686 2015 8 2.83367e+01 7.55579e-01 2063 2015 9 2.91915e+01 8.04403e-01 2312 2015 10 2.93679e+01 8.25435e-01 2222 2015 11 2.82197e+01 9.99669e-01 1246 2015 12 2.69831e+01 8.74094e-01 1966 2016 1 2.65805e+01 6.17621e-01 2465 2016 2 2.65410e+01 6.51367e-01 2330 2016 3 2.63215e+01 7.37388e-01 2487 2016 4 2.71028e+01 1.03451e+00 1462 2016 5 2.77738e+01 4.68878e-01 1224 2016 6 2.82073e+01 7.41808e-01 1693 2016 7 2.83338e+01 5.13435e-01 1907 2016 8 2.87025e+01 5.52060e-01 2313 2016 9 2.92148e+01 8.35425e-01 1916 2016 10 2.88735e+01 1.05002e+00 1680 2016 11 2.83937e+01 5.97064e-01 969 2016 12 2.70422e+01 7.92808e-01 2235 2017 1 2.59991e+01 6.92568e-01 1979 2017 2 2.62711e+01 7.31252e-01 2080 2017 3 2.61325e+01 5.74125e-01 2117 2017 4 2.67596e+01 1.04838e+00 2086 2017 5 2.72716e+01 7.29621e-01 1862 2017 6 2.82189e+01 6.78196e-01 1798 2017 7 2.86318e+01 7.44946e-01 1804 2017 8 2.83671e+01 7.05227e-01 2243 2017 9 2.83972e+01 1.56647e+00 1303 2017 10 2.81754e+01 8.05236e-01 1528 2017 11 2.81628e+01 6.97036e-01 2045 2017 12 2.71398e+01 8.60589e-01 2117 2018 1 2.63313e+01 6.50845e-01 1887 2018 2 2.55606e+01 7.31295e-01 2091 2018 3 2.62612e+01 7.35468e-01 3117 2018 4 2.69659e+01 7.48087e-01 2333 2018 5 2.69500e+01 8.09994e-01 2000 2018 6 2.74799e+01 8.61134e-01 1492 2018 7 2.70929e+01 1.03812e+00 689 2018 8 2.84794e+01 4.97246e-01 2537 2018 9 2.86260e+01 7.52711e-01 2173 2018 10 2.87281e+01 9.42156e-01 1299 2018 11 2.76739e+01 8.61404e-01 2276 2018 12 2.69502e+01 6.35782e-01 2536 2019 1 2.59083e+01 7.08627e-01 2432 2019 2 2.59889e+01 7.95358e-01 2176 2019 3 2.64870e+01 6.62690e-01 3129 2019 4 2.68468e+01 7.76909e-01 2662 2019 5 2.75969e+01 7.69507e-01 1567 2019 6 2.76488e+01 8.32818e-01 1766 2019 7 2.81001e+01 7.50116e-01 1765 2019 8 2.84232e+01 8.96485e-01 2144 2019 9 2.92144e+01 7.31091e-01 1532 2019 10 2.93690e+01 7.94576e-01 2335 2019 11 2.84751e+01 6.91144e-01 2462 2019 12 2.78911e+01 8.60089e-01 2367 2020 1 2.65607e+01 7.95372e-01 1633 2020 2 2.64553e+01 6.44869e-01 2574 2020 3 2.65103e+01 6.22532e-01 1837 2020 4 2.73778e+01 7.62884e-01 2710 2020 5 2.81180e+01 7.69071e-01 1926 2020 6 2.88054e+01 8.46113e-01 2013 2020 7 2.86787e+01 9.01322e-01 1590 2020 8 2.86555e+01 7.67747e-01 2025 2020 9 2.95075e+01 8.19825e-01 2250 2020 10 2.89529e+01 9.77956e-01 2194 2020 11 2.77294e+01 7.39949e-01 1916 2020 12 2.70725e+01 6.60799e-01 2890 2021 1 2.61976e+01 5.82013e-01 2667 2021 2 2.60719e+01 5.45795e-01 2695 2021 3 2.62129e+01 7.75061e-01 3301 2021 4 2.66914e+01 8.55319e-01 2056 2021 5 2.71664e+01 8.04305e-01 2439 2021 6 2.77374e+01 7.72783e-01 1177 2021 7 2.77978e+01 6.55530e-01 1814 2021 8 2.80538e+01 8.84305e-01 1799 2021 9 2.92297e+01 7.80643e-01 2491 2021 10 2.93112e+01 7.58739e-01 1997 2021 11 2.83549e+01 6.26661e-01 2417 2021 12 2.69718e+01 9.29549e-01 2229 2022 1 2.64608e+01 6.67318e-01 2910 2022 2 2.60858e+01 8.09233e-01 2085 2022 3 2.61231e+01 8.01466e-01 2198 2022 4 2.69372e+01 5.78552e-01 905 2022 5 2.70424e+01 8.79417e-01 2066 2022 6 2.80755e+01 8.80316e-01 2037 2022 7 2.77159e+01 9.38039e-01 1412 2022 8 2.85015e+01 8.98088e-01 1848 2022 9 2.85676e+01 1.10445e+00 1319 2022 10 2.88638e+01 6.77956e-01 1837 2022 11 2.79103e+01 5.92410e-01 2292 2022 12 2.67919e+01 6.18172e-01 3046 2023 1 2.62924e+01 5.68602e-01 2511 2023 2 2.55531e+01 5.52356e-01 2171 2023 3 2.60798e+01 9.12013e-01 3021 2023 4 2.69924e+01 8.12065e-01 2485 2023 5 2.81984e+01 5.54001e-01 2654 2023 6 2.87377e+01 6.37958e-01 1789 2023 7 2.87503e+01 6.93901e-01 1430 2023 8 2.93819e+01 7.50718e-01 1622 2023 9 2.98076e+01 8.90362e-01 2307 2023 10 2.95875e+01 9.46061e-01 1825 2023 11 2.85595e+01 7.33166e-01 1899 2023 12 2.75687e+01 7.73452e-01 2541 2024 1 2.67283e+01 6.10191e-01 2447 2024 2 2.66247e+01 5.55727e-01 2091 2024 3 2.70361e+01 6.77415e-01 2911 2024 4 2.69892e+01 7.86216e-01 295