YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.49868e+01 5.94663e-01 135 2000 3 2.53587e+01 5.77798e-01 396 2000 4 2.54737e+01 6.10077e-01 441 2000 5 2.67544e+01 7.92284e-01 590 2000 6 2.66217e+01 6.99533e-01 314 2000 7 2.70787e+01 6.96978e-01 403 2000 8 2.83050e+01 5.91793e-01 203 2000 9 2.85123e+01 3.92057e-01 592 2000 10 2.89411e+01 4.31523e-01 678 2000 11 2.80471e+01 6.55637e-01 565 2000 12 2.65624e+01 5.48525e-01 568 2001 1 2.59386e+01 6.78527e-01 583 2001 2 2.57393e+01 5.65400e-01 486 2001 3 2.55746e+01 5.31850e-01 619 2001 4 2.59594e+01 1.16586e+00 387 2001 5 2.65580e+01 1.07363e+00 461 2001 6 2.74212e+01 7.36187e-01 256 2001 7 2.75185e+01 1.03118e+00 479 2001 8 2.84279e+01 3.86992e-01 675 2001 9 2.86417e+01 6.33137e-01 756 2001 10 2.82644e+01 4.85368e-01 587 2001 11 2.69048e+01 1.65592e+00 432 2001 12 2.73856e+01 5.56998e-01 501 2002 1 2.61282e+01 6.48763e-01 805 2002 2 2.56261e+01 5.12535e-01 513 2002 3 2.59356e+01 5.15349e-01 549 2002 4 2.64140e+01 6.04034e-01 492 2002 5 2.67781e+01 5.24430e-01 704 2002 6 2.65796e+01 1.04274e+00 272 2002 7 2.75324e+01 7.53191e-01 2118 2002 8 2.82807e+01 6.40442e-01 2329 2002 9 2.88577e+01 8.16595e-01 1828 2002 10 2.86144e+01 6.43587e-01 2714 2002 11 2.82772e+01 6.57999e-01 3280 2002 12 2.71756e+01 5.60872e-01 2582 2003 1 2.65977e+01 7.07629e-01 2357 2003 2 2.64300e+01 6.34699e-01 2299 2003 3 2.65683e+01 5.32650e-01 2737 2003 4 2.66829e+01 8.70218e-01 1827 2003 5 2.70867e+01 7.83603e-01 1964 2003 6 2.67013e+01 6.33381e-01 828 2003 7 2.69685e+01 9.05340e-01 1347 2003 8 2.80430e+01 8.11776e-01 2140 2003 9 2.86533e+01 8.44066e-01 1905 2003 10 2.90201e+01 6.18562e-01 2815 2003 11 2.77538e+01 7.01265e-01 1411 2003 12 2.67927e+01 6.39404e-01 1829 2004 1 2.64804e+01 4.55435e-01 3080 2004 2 2.63132e+01 5.12034e-01 2561 2004 3 2.59195e+01 6.17554e-01 2495 2004 4 2.69079e+01 6.32402e-01 3204 2004 5 2.65556e+01 7.81777e-01 1439 2004 6 2.72386e+01 1.01828e+00 1830 2004 7 2.77310e+01 6.91132e-01 1742 2004 8 2.81854e+01 8.65248e-01 2134 2004 9 2.86179e+01 6.65742e-01 1566 2004 10 2.86603e+01 9.14760e-01 1879 2004 11 2.76070e+01 7.44617e-01 1746 2004 12 2.67060e+01 5.34516e-01 2819 2005 1 2.56639e+01 6.72437e-01 1832 2005 2 2.49088e+01 7.46627e-01 1859 2005 3 2.61270e+01 7.78502e-01 3009 2005 4 2.71425e+01 7.97206e-01 2237 2005 5 2.81010e+01 7.34728e-01 1887 2005 6 2.79986e+01 1.05803e+00 1661 2005 7 2.83181e+01 8.26727e-01 1351 2005 8 2.92114e+01 7.43682e-01 1632 2005 9 2.95761e+01 8.59742e-01 2090 2005 10 2.88360e+01 7.69546e-01 1666 2005 11 2.81721e+01 7.50879e-01 2137 2005 12 2.67695e+01 7.54364e-01 2321 2006 1 2.61872e+01 5.68562e-01 2295 2006 2 2.59373e+01 5.56834e-01 2839 2006 3 2.61697e+01 7.16857e-01 2964 2006 4 2.70226e+01 8.80796e-01 2533 2006 5 2.77175e+01 7.47731e-01 1925 2006 6 2.80359e+01 7.91907e-01 1179 2006 7 2.77594e+01 7.26023e-01 1590 2006 8 2.80828e+01 8.00417e-01 1771 2006 9 2.89653e+01 9.56924e-01 2418 2006 10 2.88852e+01 8.60806e-01 1850 2006 11 2.82395e+01 5.60053e-01 3048 2006 12 2.72662e+01 6.35876e-01 3045 2007 1 2.63422e+01 5.80812e-01 2914 2007 2 2.63642e+01 6.58901e-01 2800 2007 3 2.65068e+01 7.45505e-01 2141 2007 4 2.67734e+01 8.42883e-01 2068 2007 5 2.79321e+01 7.33502e-01 1926 2007 6 2.76738e+01 1.02111e+00 1871 2007 7 2.78149e+01 8.34891e-01 1324 2007 8 2.79236e+01 9.60325e-01 1538 2007 9 2.88630e+01 6.15840e-01 1867 2007 10 2.87325e+01 7.92412e-01 1640 2007 11 2.79488e+01 7.48101e-01 2088 2007 12 2.67330e+01 4.85133e-01 2413 2008 1 2.62667e+01 6.45740e-01 2350 2008 2 2.57830e+01 4.27002e-01 2901 2008 3 2.57377e+01 5.53792e-01 2905 2008 4 2.59389e+01 7.95900e-01 2266 2008 5 2.68761e+01 1.00501e+00 2488 2008 6 2.74593e+01 8.62328e-01 1569 2008 7 2.77262e+01 8.43526e-01 2158 2008 8 2.81639e+01 9.59747e-01 2099 2008 9 2.85541e+01 7.60064e-01 1640 2008 10 2.84760e+01 9.04060e-01 2190 2008 11 2.80056e+01 9.61003e-01 2476 2008 12 2.62667e+01 7.08954e-01 2542 2009 1 2.58412e+01 5.00426e-01 3245 2009 2 2.57195e+01 5.99889e-01 1789 2009 3 2.49875e+01 8.17345e-01 1696 2009 4 2.61037e+01 8.10639e-01 2813 2009 5 2.68681e+01 9.38509e-01 1221 2009 6 2.75241e+01 9.92279e-01 1373 2009 7 2.76033e+01 9.23801e-01 1271 2009 8 2.80454e+01 5.75086e-01 2450 2009 9 2.89063e+01 7.24239e-01 1872 2009 10 2.86521e+01 6.43156e-01 2721 2009 11 2.81495e+01 6.73688e-01 2158 2009 12 2.74283e+01 7.29741e-01 2649 2010 1 2.68147e+01 5.19755e-01 2366 2010 2 2.68988e+01 6.55080e-01 2700 2010 3 2.72696e+01 6.76012e-01 2882 2010 4 2.70497e+01 7.82022e-01 1275 2010 5 2.80325e+01 1.00827e+00 1485 2010 6 2.81293e+01 9.02212e-01 1479 2010 7 2.81173e+01 7.87045e-01 1187 2010 8 2.90856e+01 8.88291e-01 1721 2010 9 2.87538e+01 6.24715e-01 1715 2010 10 2.87663e+01 6.03386e-01 2223 2010 11 2.71171e+01 6.41222e-01 1409 2010 12 2.65900e+01 6.13050e-01 1773 2011 1 2.59359e+01 6.67633e-01 2932 2011 2 2.60141e+01 5.02963e-01 2889 2011 3 2.55534e+01 6.76715e-01 2841 2011 4 2.63495e+01 7.70781e-01 2320 2011 5 2.71978e+01 9.86781e-01 940 2011 6 2.79642e+01 7.91086e-01 1271 2011 7 2.79227e+01 6.00737e-01 1592 2011 8 2.81534e+01 7.11005e-01 1346 2011 9 2.80235e+01 1.15297e+00 1548 2011 10 2.86465e+01 8.04578e-01 2709 2011 11 2.80469e+01 6.14958e-01 2140 2011 12 2.71519e+01 6.94012e-01 1937 2012 1 2.61298e+01 6.10565e-01 2694 2012 2 2.59206e+01 6.49775e-01 2255 2012 3 2.59533e+01 5.25926e-01 2336 2012 4 2.66452e+01 7.44948e-01 2316 2012 5 2.66778e+01 9.47998e-01 1453 2012 6 2.75447e+01 9.25513e-01 1865 2012 7 2.77591e+01 7.96264e-01 1554 2012 8 2.80354e+01 5.48946e-01 1654 2012 9 2.87859e+01 8.70662e-01 1876 2012 10 2.88216e+01 9.57965e-01 2089 2012 11 2.84502e+01 6.06292e-01 2317 2012 12 2.75242e+01 6.70571e-01 2390 2013 1 2.61476e+01 6.18316e-01 2602 2013 2 2.58947e+01 5.14576e-01 3151 2013 3 2.61155e+01 7.77393e-01 2690 2013 4 2.66292e+01 7.63076e-01 2640 2013 5 2.71625e+01 1.03931e+00 1524 2013 6 2.64746e+01 7.94877e-01 769 2013 7 2.77499e+01 8.36578e-01 1828 2013 8 2.84169e+01 7.76673e-01 1779 2013 9 2.88579e+01 8.84356e-01 2028 2013 10 2.91494e+01 8.92333e-01 1848 2013 11 2.80475e+01 5.88448e-01 2016 2013 12 2.68418e+01 7.37215e-01 2290 2014 1 2.62690e+01 5.31406e-01 3242 2014 2 2.59832e+01 6.20257e-01 3231 2014 3 2.63310e+01 7.14037e-01 3290 2014 4 2.67285e+01 7.41827e-01 2755 2014 5 2.72307e+01 7.50078e-01 1803 2014 6 2.73726e+01 1.02300e+00 1438 2014 7 2.73851e+01 8.30963e-01 1552 2014 8 2.78424e+01 9.01138e-01 1926 2014 9 2.87324e+01 8.03684e-01 1910 2014 10 2.88569e+01 7.93694e-01 2491 2014 11 2.82189e+01 6.04209e-01 2553 2014 12 2.71327e+01 6.10486e-01 2881 2015 1 2.66038e+01 6.74488e-01 2909 2015 2 2.64600e+01 6.53943e-01 2695 2015 3 2.61114e+01 6.37825e-01 2650 2015 4 2.62326e+01 8.20463e-01 2873 2015 5 2.69679e+01 8.64887e-01 2085 2015 6 2.75730e+01 1.10472e+00 972 2015 7 2.74828e+01 6.51141e-01 1669 2015 8 2.81124e+01 9.60043e-01 2516 2015 9 2.90144e+01 9.18098e-01 2431 2015 10 2.93184e+01 1.14019e+00 2202 2015 11 2.82070e+01 7.57014e-01 1763 2015 12 2.71658e+01 6.50614e-01 2203 2016 1 2.67379e+01 4.86298e-01 2759 2016 2 2.62944e+01 7.13586e-01 2258 2016 3 2.64048e+01 7.46213e-01 2853 2016 4 2.69567e+01 7.80576e-01 2049 2016 5 2.76513e+01 6.21019e-01 1362 2016 6 2.78696e+01 9.07181e-01 1694 2016 7 2.79282e+01 7.96996e-01 1796 2016 8 2.84213e+01 6.86350e-01 2298 2016 9 2.90909e+01 6.61284e-01 2566 2016 10 2.88830e+01 1.04340e+00 1785 2016 11 2.87236e+01 5.21583e-01 1043 2016 12 2.75063e+01 7.53255e-01 2392 2017 1 2.63429e+01 6.43535e-01 2704 2017 2 2.63127e+01 6.99454e-01 2176 2017 3 2.63014e+01 5.98076e-01 2155 2017 4 2.65439e+01 9.83062e-01 1560 2017 5 2.71559e+01 7.32611e-01 1955 2017 6 2.79653e+01 9.52841e-01 2188 2017 7 2.82539e+01 7.20869e-01 2004 2017 8 2.84182e+01 6.78040e-01 2168 2017 9 2.85476e+01 1.01625e+00 1210 2017 10 2.80546e+01 1.09623e+00 1863 2017 11 2.80446e+01 8.00523e-01 2040 2017 12 2.73484e+01 6.98898e-01 2301 2018 1 2.65093e+01 8.25077e-01 2489 2018 2 2.58887e+01 5.30105e-01 2222 2018 3 2.63155e+01 7.33695e-01 2679 2018 4 2.67965e+01 6.53314e-01 2841 2018 5 2.70961e+01 6.68256e-01 2511 2018 6 2.70101e+01 9.07104e-01 1681 2018 7 2.72299e+01 7.48375e-01 903 2018 8 2.81944e+01 5.66008e-01 2700 2018 9 2.84571e+01 7.87651e-01 2017 2018 10 2.85761e+01 9.74340e-01 1981 2018 11 2.75971e+01 7.43237e-01 2463 2018 12 2.70924e+01 6.28215e-01 2775 2019 1 2.63320e+01 5.77015e-01 2943 2019 2 2.61612e+01 6.63752e-01 2661 2019 3 2.63718e+01 6.37988e-01 2792 2019 4 2.64789e+01 6.83438e-01 2511 2019 5 2.71524e+01 9.77882e-01 1364 2019 6 2.77396e+01 5.73066e-01 2513 2019 7 2.80706e+01 6.55737e-01 2173 2019 8 2.82814e+01 7.33879e-01 2297 2019 9 2.89893e+01 8.88404e-01 2128 2019 10 2.91011e+01 7.63301e-01 2264 2019 11 2.85902e+01 6.53737e-01 2863 2019 12 2.80532e+01 7.36956e-01 2411 2020 1 2.68302e+01 5.98462e-01 2051 2020 2 2.64727e+01 7.99812e-01 3111 2020 3 2.63970e+01 8.47128e-01 1809 2020 4 2.71177e+01 7.47189e-01 2972 2020 5 2.76886e+01 8.10585e-01 2689 2020 6 2.82864e+01 9.04838e-01 2553 2020 7 2.85084e+01 9.15766e-01 1681 2020 8 2.85246e+01 7.18963e-01 2233 2020 9 2.94286e+01 9.05428e-01 2066 2020 10 2.90353e+01 6.43410e-01 2351 2020 11 2.79797e+01 6.32834e-01 2306 2020 12 2.72976e+01 4.68621e-01 2892 2021 1 2.65197e+01 4.54167e-01 2581 2021 2 2.61877e+01 6.43446e-01 2302 2021 3 2.62276e+01 8.99071e-01 2944 2021 4 2.65907e+01 7.90030e-01 1824 2021 5 2.69611e+01 7.86530e-01 2508 2021 6 2.75576e+01 9.89308e-01 1125 2021 7 2.78668e+01 6.90726e-01 1641 2021 8 2.80364e+01 6.40640e-01 1975 2021 9 2.90674e+01 7.07466e-01 2668 2021 10 2.90687e+01 7.59981e-01 2710 2021 11 2.83194e+01 7.01948e-01 2687 2021 12 2.74890e+01 5.62348e-01 2953 2022 1 2.68370e+01 4.63423e-01 2933 2022 2 2.62508e+01 5.91336e-01 2218 2022 3 2.62213e+01 6.65581e-01 2477 2022 4 2.62442e+01 9.30959e-01 765 2022 5 2.71118e+01 7.41635e-01 2027 2022 6 2.77293e+01 9.09859e-01 1985 2022 7 2.77490e+01 7.53887e-01 1668 2022 8 2.83673e+01 9.97382e-01 2565 2022 9 2.85913e+01 8.39041e-01 1559 2022 10 2.87153e+01 7.21152e-01 2100 2022 11 2.79025e+01 5.58208e-01 2664 2022 12 2.68813e+01 5.22317e-01 2871 2023 1 2.65695e+01 6.22393e-01 3050 2023 2 2.58491e+01 4.50807e-01 2688 2023 3 2.61140e+01 8.59135e-01 2863 2023 4 2.68957e+01 7.54181e-01 2368 2023 5 2.78810e+01 5.90267e-01 3155 2023 6 2.82595e+01 6.66486e-01 2318 2023 7 2.85092e+01 6.21918e-01 1318 2023 8 2.94030e+01 8.62978e-01 1800 2023 9 2.95835e+01 6.32024e-01 2361 2023 10 2.96449e+01 8.65912e-01 2419 2023 11 2.85498e+01 8.96312e-01 2225 2023 12 2.78084e+01 7.47938e-01 2772 2024 1 2.68981e+01 5.67459e-01 2575 2024 2 2.67404e+01 5.44107e-01 2258 2024 3 2.70617e+01 8.30006e-01 3206 2024 4 2.67017e+01 4.33177e-01 367