YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.53904e+01 2.04137e-01 128 2000 3 2.52459e+01 1.19985e+00 519 2000 4 2.58025e+01 6.96218e-01 684 2000 5 2.71887e+01 5.89708e-01 389 2000 6 2.64498e+01 7.09273e-01 235 2000 7 2.76711e+01 5.99046e-01 404 2000 8 2.84552e+01 2.59284e-01 116 2000 9 2.85492e+01 5.00803e-01 659 2000 10 2.91355e+01 5.51416e-01 654 2000 11 2.79943e+01 7.58718e-01 623 2000 12 2.73725e+01 5.97289e-01 766 2001 1 2.62684e+01 4.08399e-01 631 2001 2 2.57935e+01 4.80580e-01 667 2001 3 2.58377e+01 5.99883e-01 690 2001 4 2.63988e+01 9.14920e-01 333 2001 5 2.70893e+01 9.44418e-01 507 2001 6 2.72111e+01 7.68783e-01 179 2001 7 2.73309e+01 1.28756e+00 422 2001 8 2.79313e+01 9.23125e-01 449 2001 9 2.87139e+01 8.63824e-01 685 2001 10 2.82353e+01 1.12850e+00 543 2001 11 2.81956e+01 6.27444e-01 420 2001 12 2.71893e+01 5.40979e-01 449 2002 1 2.68265e+01 6.09366e-01 658 2002 2 2.65319e+01 5.47863e-01 718 2002 3 2.60061e+01 4.98939e-01 605 2002 4 2.65153e+01 5.46473e-01 360 2002 5 2.66929e+01 7.71692e-01 488 2002 6 2.67640e+01 8.41045e-01 237 2002 7 2.74727e+01 7.37881e-01 1631 2002 8 2.83728e+01 8.49482e-01 896 2002 9 2.85710e+01 1.04420e+00 1744 2002 10 2.86716e+01 5.99605e-01 2884 2002 11 2.83765e+01 5.90719e-01 2988 2002 12 2.74309e+01 5.01004e-01 3284 2003 1 2.69607e+01 4.63402e-01 2809 2003 2 2.63679e+01 4.72854e-01 2339 2003 3 2.66338e+01 5.24182e-01 3351 2003 4 2.69861e+01 6.14281e-01 2034 2003 5 2.70983e+01 6.83568e-01 1857 2003 6 2.73255e+01 8.96388e-01 618 2003 7 2.69714e+01 7.22985e-01 1475 2003 8 2.80047e+01 6.84076e-01 1825 2003 9 2.88506e+01 8.36981e-01 2193 2003 10 2.91687e+01 7.61038e-01 2382 2003 11 2.82141e+01 7.31495e-01 1540 2003 12 2.72229e+01 7.59063e-01 2153 2004 1 2.65473e+01 5.20889e-01 2312 2004 2 2.64221e+01 5.56014e-01 2675 2004 3 2.61816e+01 7.03749e-01 2510 2004 4 2.69859e+01 7.13382e-01 2692 2004 5 2.67588e+01 8.22457e-01 1211 2004 6 2.73806e+01 6.69374e-01 1109 2004 7 2.76347e+01 8.69454e-01 1732 2004 8 2.81531e+01 7.04705e-01 1708 2004 9 2.85977e+01 7.57992e-01 1375 2004 10 2.87810e+01 7.78158e-01 2150 2004 11 2.73675e+01 7.31554e-01 2017 2004 12 2.68260e+01 5.35427e-01 2366 2005 1 2.56173e+01 1.03709e+00 1579 2005 2 2.55148e+01 6.66445e-01 2599 2005 3 2.63400e+01 7.14176e-01 3017 2005 4 2.73113e+01 7.72600e-01 2369 2005 5 2.79602e+01 7.26873e-01 1483 2005 6 2.84461e+01 6.90792e-01 1356 2005 7 2.83830e+01 8.21718e-01 1534 2005 8 2.88822e+01 8.84492e-01 1480 2005 9 2.94197e+01 7.86822e-01 2065 2005 10 2.87135e+01 1.22699e+00 1163 2005 11 2.82337e+01 7.16102e-01 2309 2005 12 2.73413e+01 7.00296e-01 2600 2006 1 2.67284e+01 5.13539e-01 2005 2006 2 2.63317e+01 6.15348e-01 2968 2006 3 2.63890e+01 4.83533e-01 2689 2006 4 2.67987e+01 8.45223e-01 2323 2006 5 2.77695e+01 7.41655e-01 1953 2006 6 2.79940e+01 9.51193e-01 1263 2006 7 2.81560e+01 5.94347e-01 1738 2006 8 2.81610e+01 9.00157e-01 1293 2006 9 2.89888e+01 7.30592e-01 2266 2006 10 2.93097e+01 7.13837e-01 2110 2006 11 2.88752e+01 6.38293e-01 2842 2006 12 2.77732e+01 5.90644e-01 2635 2007 1 2.67352e+01 5.35409e-01 3180 2007 2 2.67073e+01 5.10148e-01 2653 2007 3 2.64565e+01 7.19786e-01 1824 2007 4 2.67921e+01 7.24527e-01 2361 2007 5 2.79929e+01 9.15512e-01 1540 2007 6 2.79275e+01 7.72267e-01 1677 2007 7 2.78684e+01 5.44167e-01 1477 2007 8 2.80239e+01 8.07179e-01 1397 2007 9 2.82489e+01 1.14742e+00 2234 2007 10 2.89395e+01 7.61122e-01 1470 2007 11 2.78641e+01 7.29071e-01 1911 2007 12 2.70356e+01 5.51216e-01 2588 2008 1 2.65591e+01 5.05728e-01 3199 2008 2 2.59813e+01 6.26785e-01 2752 2008 3 2.59092e+01 5.99375e-01 2944 2008 4 2.62454e+01 8.71244e-01 2274 2008 5 2.70633e+01 8.41363e-01 1998 2008 6 2.75281e+01 8.13495e-01 1604 2008 7 2.74541e+01 6.73502e-01 1850 2008 8 2.83658e+01 8.54306e-01 1973 2008 9 2.87617e+01 8.31691e-01 1647 2008 10 2.86479e+01 6.03549e-01 2716 2008 11 2.83460e+01 5.97066e-01 2127 2008 12 2.69667e+01 5.41533e-01 2406 2009 1 2.59352e+01 6.62935e-01 2776 2009 2 2.60845e+01 4.94157e-01 2032 2009 3 2.56392e+01 6.09992e-01 1635 2009 4 2.61464e+01 5.81083e-01 2241 2009 5 2.65694e+01 6.70860e-01 1138 2009 6 2.74795e+01 1.14845e+00 1122 2009 7 2.78375e+01 9.27974e-01 1833 2009 8 2.80870e+01 6.28733e-01 1793 2009 9 2.88265e+01 8.95062e-01 1975 2009 10 2.89129e+01 6.24737e-01 2858 2009 11 2.85301e+01 4.86903e-01 2982 2009 12 2.77923e+01 5.42955e-01 2766 2010 1 2.71380e+01 7.41290e-01 1982 2010 2 2.70370e+01 6.17268e-01 2417 2010 3 2.74339e+01 6.20849e-01 2411 2010 4 2.72456e+01 7.48088e-01 1935 2010 5 2.80589e+01 9.05923e-01 1222 2010 6 2.83706e+01 7.38734e-01 1438 2010 7 2.81876e+01 5.58477e-01 1148 2010 8 2.88406e+01 8.82389e-01 2016 2010 9 2.88093e+01 7.13786e-01 1638 2010 10 2.88889e+01 8.45322e-01 2318 2010 11 2.75838e+01 7.21886e-01 1455 2010 12 2.73516e+01 7.48418e-01 1940 2011 1 2.61907e+01 6.40090e-01 2705 2011 2 2.60175e+01 5.16012e-01 2575 2011 3 2.57045e+01 7.38618e-01 2557 2011 4 2.63401e+01 6.67342e-01 2683 2011 5 2.67847e+01 1.09403e+00 1411 2011 6 2.80261e+01 5.69744e-01 1204 2011 7 2.81187e+01 7.39619e-01 1676 2011 8 2.80300e+01 6.76650e-01 1686 2011 9 2.86845e+01 9.48773e-01 1839 2011 10 2.89257e+01 6.98116e-01 2609 2011 11 2.79987e+01 7.07209e-01 2031 2011 12 2.75553e+01 6.65359e-01 2918 2012 1 2.66429e+01 5.74235e-01 2942 2012 2 2.60523e+01 5.45064e-01 2587 2012 3 2.60164e+01 5.95500e-01 2851 2012 4 2.65271e+01 9.10314e-01 1655 2012 5 2.71066e+01 7.98755e-01 2066 2012 6 2.77103e+01 6.05040e-01 1754 2012 7 2.76533e+01 7.19763e-01 1433 2012 8 2.80001e+01 4.53385e-01 1477 2012 9 2.88242e+01 7.52356e-01 2841 2012 10 2.87735e+01 8.69529e-01 1656 2012 11 2.86999e+01 7.52352e-01 2478 2012 12 2.77714e+01 8.18795e-01 2277 2013 1 2.67003e+01 5.31042e-01 2275 2013 2 2.63168e+01 8.03975e-01 2587 2013 3 2.62667e+01 9.74947e-01 2218 2013 4 2.69007e+01 5.53937e-01 2470 2013 5 2.76822e+01 1.01081e+00 1786 2013 6 2.72630e+01 7.20981e-01 649 2013 7 2.78340e+01 6.02989e-01 1707 2013 8 2.83860e+01 6.16621e-01 2110 2013 9 2.91133e+01 7.63854e-01 1818 2013 10 2.93765e+01 1.07065e+00 2152 2013 11 2.80861e+01 7.54103e-01 2364 2013 12 2.72013e+01 7.18653e-01 2902 2014 1 2.67343e+01 4.26613e-01 3409 2014 2 2.63618e+01 4.75529e-01 2394 2014 3 2.65651e+01 6.48366e-01 3119 2014 4 2.67957e+01 8.32071e-01 2465 2014 5 2.72721e+01 6.22872e-01 1658 2014 6 2.73975e+01 8.53556e-01 1090 2014 7 2.76335e+01 6.85573e-01 1612 2014 8 2.78674e+01 6.37992e-01 1291 2014 9 2.88743e+01 8.31636e-01 1389 2014 10 2.91338e+01 7.85763e-01 2790 2014 11 2.84842e+01 5.99127e-01 2222 2014 12 2.75548e+01 5.82221e-01 2575 2015 1 2.68227e+01 5.37498e-01 3250 2015 2 2.67390e+01 4.26203e-01 2076 2015 3 2.65627e+01 6.50286e-01 2787 2015 4 2.68662e+01 6.37826e-01 2820 2015 5 2.72787e+01 6.26138e-01 1965 2015 6 2.70376e+01 1.14124e+00 1366 2015 7 2.74353e+01 6.33139e-01 1624 2015 8 2.80693e+01 6.16747e-01 2072 2015 9 2.89768e+01 8.44552e-01 2452 2015 10 2.94396e+01 7.72748e-01 2008 2015 11 2.86957e+01 6.86964e-01 1509 2015 12 2.74640e+01 7.72924e-01 2341 2016 1 2.68338e+01 7.00103e-01 2291 2016 2 2.67620e+01 5.26201e-01 2329 2016 3 2.67664e+01 5.09537e-01 2906 2016 4 2.72692e+01 7.66361e-01 1957 2016 5 2.80235e+01 7.32438e-01 1324 2016 6 2.79198e+01 7.24759e-01 1142 2016 7 2.81409e+01 6.89573e-01 1872 2016 8 2.85027e+01 6.30678e-01 2218 2016 9 2.91908e+01 8.24910e-01 2715 2016 10 2.89158e+01 1.21808e+00 1962 2016 11 2.87666e+01 5.50023e-01 1391 2016 12 2.78282e+01 6.43388e-01 2966 2017 1 2.67483e+01 5.74230e-01 2227 2017 2 2.65148e+01 6.62925e-01 2820 2017 3 2.64721e+01 6.03921e-01 2208 2017 4 2.70604e+01 5.68675e-01 2324 2017 5 2.75822e+01 6.66061e-01 1565 2017 6 2.77920e+01 8.84548e-01 1947 2017 7 2.85020e+01 6.20394e-01 1943 2017 8 2.86330e+01 6.04584e-01 2327 2017 9 2.84471e+01 1.21816e+00 852 2017 10 2.86788e+01 7.20476e-01 1800 2017 11 2.83248e+01 7.70446e-01 1860 2017 12 2.76629e+01 6.09093e-01 3268 2018 1 2.69536e+01 8.01996e-01 2609 2018 2 2.63502e+01 5.98317e-01 1833 2018 3 2.64171e+01 5.36912e-01 2717 2018 4 2.66960e+01 7.93756e-01 2126 2018 5 2.70433e+01 6.99404e-01 2043 2018 6 2.77423e+01 7.39815e-01 1243 2018 7 2.74215e+01 7.45939e-01 1037 2018 8 2.82863e+01 5.83652e-01 2202 2018 9 2.86500e+01 7.61480e-01 2252 2018 10 2.87162e+01 9.12394e-01 1760 2018 11 2.81981e+01 6.46813e-01 2655 2018 12 2.74112e+01 5.18953e-01 2713 2019 1 2.66460e+01 5.47138e-01 2852 2019 2 2.64100e+01 5.60024e-01 2431 2019 3 2.64751e+01 5.57617e-01 2364 2019 4 2.67313e+01 5.79260e-01 2315 2019 5 2.77406e+01 6.92588e-01 1356 2019 6 2.78616e+01 8.15385e-01 1889 2019 7 2.79892e+01 9.02941e-01 2057 2019 8 2.84166e+01 7.99047e-01 2211 2019 9 2.92245e+01 7.12467e-01 1746 2019 10 2.93337e+01 5.89440e-01 2701 2019 11 2.87660e+01 5.49153e-01 3097 2019 12 2.82511e+01 8.34299e-01 2964 2020 1 2.71336e+01 5.66162e-01 2366 2020 2 2.68401e+01 4.83258e-01 3230 2020 3 2.67805e+01 6.55581e-01 1795 2020 4 2.72922e+01 7.35591e-01 2178 2020 5 2.79398e+01 6.76772e-01 2215 2020 6 2.86048e+01 7.83462e-01 1953 2020 7 2.85926e+01 9.15527e-01 1680 2020 8 2.88433e+01 6.20798e-01 1900 2020 9 2.93881e+01 9.14372e-01 2482 2020 10 2.92870e+01 8.10870e-01 2270 2020 11 2.83106e+01 6.39726e-01 1467 2020 12 2.75644e+01 5.86879e-01 2900 2021 1 2.67550e+01 6.77368e-01 2425 2021 2 2.67265e+01 4.81230e-01 3011 2021 3 2.63911e+01 4.97665e-01 2853 2021 4 2.67808e+01 5.69765e-01 1961 2021 5 2.70859e+01 5.74098e-01 2368 2021 6 2.77811e+01 7.94697e-01 1251 2021 7 2.75667e+01 8.27967e-01 1826 2021 8 2.82621e+01 6.19449e-01 1659 2021 9 2.90192e+01 7.32399e-01 2860 2021 10 2.94716e+01 6.30408e-01 2814 2021 11 2.86964e+01 5.95355e-01 2577 2021 12 2.76298e+01 5.55247e-01 3006 2022 1 2.70213e+01 4.78390e-01 3601 2022 2 2.65953e+01 6.26684e-01 2337 2022 3 2.65954e+01 6.09256e-01 2547 2022 4 2.68703e+01 6.46000e-01 967 2022 5 2.72468e+01 1.06657e+00 1689 2022 6 2.79224e+01 5.87983e-01 1467 2022 7 2.79333e+01 4.79588e-01 1558 2022 8 2.83929e+01 7.47645e-01 1749 2022 9 2.90182e+01 7.28510e-01 2107 2022 10 2.89813e+01 5.74056e-01 1732 2022 11 2.79332e+01 6.26427e-01 2984 2022 12 2.70575e+01 4.87011e-01 2882 2023 1 2.66817e+01 5.49890e-01 2720 2023 2 2.60197e+01 4.75202e-01 2520 2023 3 2.61775e+01 7.66873e-01 2982 2023 4 2.67032e+01 6.43906e-01 2623 2023 5 2.84609e+01 6.54958e-01 2783 2023 6 2.87377e+01 4.61021e-01 1919 2023 7 2.86707e+01 5.89926e-01 1544 2023 8 2.92571e+01 6.07243e-01 1442 2023 9 2.96564e+01 8.54124e-01 2209 2023 10 2.98932e+01 8.71415e-01 2137 2023 11 2.90267e+01 8.30865e-01 2250 2023 12 2.82070e+01 5.89876e-01 2911 2024 1 2.73684e+01 4.46636e-01 2972 2024 2 2.69493e+01 6.98629e-01 2509 2024 3 2.71823e+01 5.52173e-01 2513 2024 4 2.69573e+01 2.97926e-01 150