YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.63578e+01 3.05814e-01 189 2000 3 2.61880e+01 7.17612e-01 619 2000 4 2.63918e+01 9.66166e-01 418 2000 5 2.79499e+01 8.74365e-01 628 2000 6 2.72080e+01 6.17678e-01 433 2000 7 2.78783e+01 9.32805e-01 761 2000 8 2.82603e+01 9.62466e-01 311 2000 9 2.93049e+01 6.66929e-01 598 2000 10 2.90855e+01 7.49138e-01 615 2000 11 2.86227e+01 8.19168e-01 957 2000 12 2.69314e+01 6.54037e-01 550 2001 1 2.63740e+01 4.40881e-01 425 2001 2 2.61336e+01 6.85824e-01 580 2001 3 2.65198e+01 5.96529e-01 410 2001 4 2.71144e+01 8.93512e-01 718 2001 5 2.76655e+01 5.79074e-01 512 2001 6 2.78984e+01 7.32037e-01 320 2001 7 2.82102e+01 8.35855e-01 455 2001 8 2.84314e+01 8.01602e-01 765 2001 9 2.93364e+01 7.66894e-01 756 2001 10 2.86111e+01 9.54774e-01 613 2001 11 2.85155e+01 1.11567e+00 517 2001 12 2.77526e+01 6.47187e-01 587 2002 1 2.70891e+01 4.85684e-01 666 2002 2 2.65507e+01 5.53952e-01 675 2002 3 2.69217e+01 6.80239e-01 832 2002 4 2.68582e+01 1.19037e+00 400 2002 5 2.73894e+01 7.27305e-01 847 2002 6 2.72216e+01 1.32782e+00 354 2002 7 2.79749e+01 6.96849e-01 1965 2002 8 2.89954e+01 4.79044e-01 1919 2002 9 2.89276e+01 7.74506e-01 1857 2002 10 2.87280e+01 7.39248e-01 2944 2002 11 2.85499e+01 4.94402e-01 3806 2002 12 2.73529e+01 5.48585e-01 3497 2003 1 2.68575e+01 4.37135e-01 3124 2003 2 2.65839e+01 5.00244e-01 3038 2003 3 2.68415e+01 6.98016e-01 3154 2003 4 2.76605e+01 6.33742e-01 2008 2003 5 2.76264e+01 8.56280e-01 2090 2003 6 2.74369e+01 7.57026e-01 1270 2003 7 2.73071e+01 1.00451e+00 1438 2003 8 2.82290e+01 8.79699e-01 2266 2003 9 2.92895e+01 8.52356e-01 2033 2003 10 2.92834e+01 8.03189e-01 2597 2003 11 2.81639e+01 8.33181e-01 1449 2003 12 2.75058e+01 6.30874e-01 2395 2004 1 2.69356e+01 5.90010e-01 2573 2004 2 2.65022e+01 5.24284e-01 2970 2004 3 2.65597e+01 5.78939e-01 3386 2004 4 2.77073e+01 7.40789e-01 2761 2004 5 2.73569e+01 1.01938e+00 1464 2004 6 2.78653e+01 8.70166e-01 1535 2004 7 2.78029e+01 7.15279e-01 2049 2004 8 2.87336e+01 7.17716e-01 1971 2004 9 2.88486e+01 9.64899e-01 1223 2004 10 2.90769e+01 8.59308e-01 2355 2004 11 2.79101e+01 7.71973e-01 2162 2004 12 2.71306e+01 4.84540e-01 3320 2005 1 2.63661e+01 5.53197e-01 2529 2005 2 2.60534e+01 5.00795e-01 2850 2005 3 2.69089e+01 7.07610e-01 3542 2005 4 2.78949e+01 9.26064e-01 2549 2005 5 2.83986e+01 8.45413e-01 1702 2005 6 2.87961e+01 7.37820e-01 1427 2005 7 2.87942e+01 7.19294e-01 1736 2005 8 2.90311e+01 1.03905e+00 1764 2005 9 3.00162e+01 7.36938e-01 2246 2005 10 2.90813e+01 7.27489e-01 1302 2005 11 2.83045e+01 7.04494e-01 2353 2005 12 2.75633e+01 6.20611e-01 3212 2006 1 2.65560e+01 5.79735e-01 2688 2006 2 2.64060e+01 5.32697e-01 2999 2006 3 2.66053e+01 6.34045e-01 2835 2006 4 2.76421e+01 8.48121e-01 2653 2006 5 2.83981e+01 7.53375e-01 2166 2006 6 2.85931e+01 7.85329e-01 1915 2006 7 2.82139e+01 6.31849e-01 1702 2006 8 2.84912e+01 7.69458e-01 2071 2006 9 2.93485e+01 7.18784e-01 2485 2006 10 2.95190e+01 6.86859e-01 2320 2006 11 2.88053e+01 5.99122e-01 3254 2006 12 2.77329e+01 7.18703e-01 3712 2007 1 2.67816e+01 5.14984e-01 3443 2007 2 2.67198e+01 5.49133e-01 3226 2007 3 2.67624e+01 6.90691e-01 2546 2007 4 2.76579e+01 6.97539e-01 3086 2007 5 2.87137e+01 7.41907e-01 1820 2007 6 2.84762e+01 6.94499e-01 1545 2007 7 2.80114e+01 8.88779e-01 1394 2007 8 2.85910e+01 8.60597e-01 1946 2007 9 2.90553e+01 9.59792e-01 2249 2007 10 2.90062e+01 6.32251e-01 1407 2007 11 2.81633e+01 7.81809e-01 2415 2007 12 2.71695e+01 5.69269e-01 3275 2008 1 2.66324e+01 6.34153e-01 3351 2008 2 2.60704e+01 4.23245e-01 3061 2008 3 2.61888e+01 5.80681e-01 3146 2008 4 2.66440e+01 8.18219e-01 2743 2008 5 2.77614e+01 7.67834e-01 2411 2008 6 2.81523e+01 6.96371e-01 1825 2008 7 2.79147e+01 8.82764e-01 2674 2008 8 2.91346e+01 5.74016e-01 2547 2008 9 2.89491e+01 1.00903e+00 1595 2008 10 2.88385e+01 6.47058e-01 2726 2008 11 2.83279e+01 7.50799e-01 2130 2008 12 2.68251e+01 5.78432e-01 3555 2009 1 2.61885e+01 5.25208e-01 3423 2009 2 2.61823e+01 5.46223e-01 2431 2009 3 2.61370e+01 5.87676e-01 2557 2009 4 2.67595e+01 7.99401e-01 2781 2009 5 2.73719e+01 7.68058e-01 1443 2009 6 2.79100e+01 1.01848e+00 1978 2009 7 2.82078e+01 7.19115e-01 1916 2009 8 2.84444e+01 6.76374e-01 2415 2009 9 2.91281e+01 6.41810e-01 2456 2009 10 2.91341e+01 7.05849e-01 2568 2009 11 2.87910e+01 6.44823e-01 3046 2009 12 2.78693e+01 6.19109e-01 2796 2010 1 2.70605e+01 6.77291e-01 2279 2010 2 2.71287e+01 6.89394e-01 2650 2010 3 2.79467e+01 6.89019e-01 2701 2010 4 2.79315e+01 5.85669e-01 2246 2010 5 2.86562e+01 9.71261e-01 1775 2010 6 2.88081e+01 7.62451e-01 1868 2010 7 2.88382e+01 5.86069e-01 1490 2010 8 2.93377e+01 8.24841e-01 2336 2010 9 2.96138e+01 6.17959e-01 1357 2010 10 2.92002e+01 7.06363e-01 2114 2010 11 2.77377e+01 8.65808e-01 1446 2010 12 2.71781e+01 7.96040e-01 1807 2011 1 2.62854e+01 5.40721e-01 2958 2011 2 2.63928e+01 5.10837e-01 2951 2011 3 2.66399e+01 6.69885e-01 3117 2011 4 2.72415e+01 8.20425e-01 2964 2011 5 2.79486e+01 1.08571e+00 1229 2011 6 2.88213e+01 1.20105e+00 1401 2011 7 2.86426e+01 6.96853e-01 1634 2011 8 2.86156e+01 6.37901e-01 1897 2011 9 2.93055e+01 7.96730e-01 1768 2011 10 2.91626e+01 7.49303e-01 2799 2011 11 2.83970e+01 7.11545e-01 2370 2011 12 2.78117e+01 7.82716e-01 3214 2012 1 2.67778e+01 5.86483e-01 3381 2012 2 2.64301e+01 5.48767e-01 3118 2012 3 2.63798e+01 6.56715e-01 3095 2012 4 2.73601e+01 9.31531e-01 1937 2012 5 2.76983e+01 7.31124e-01 2022 2012 6 2.80596e+01 6.95595e-01 1954 2012 7 2.82156e+01 7.71912e-01 2102 2012 8 2.84540e+01 5.20086e-01 1985 2012 9 2.92525e+01 7.96199e-01 2667 2012 10 2.93788e+01 8.37393e-01 1746 2012 11 2.90233e+01 5.69710e-01 3512 2012 12 2.76569e+01 6.63528e-01 2625 2013 1 2.67601e+01 5.47851e-01 3135 2013 2 2.61818e+01 4.81565e-01 2972 2013 3 2.68127e+01 7.90091e-01 2817 2013 4 2.73332e+01 7.73043e-01 3331 2013 5 2.83876e+01 7.80980e-01 2310 2013 6 2.73133e+01 1.34197e+00 1424 2013 7 2.84095e+01 7.69396e-01 2586 2013 8 2.86644e+01 6.70164e-01 1972 2013 9 2.93151e+01 7.02401e-01 2090 2013 10 2.93081e+01 7.57126e-01 2125 2013 11 2.85391e+01 5.18416e-01 2555 2013 12 2.73335e+01 5.66753e-01 3146 2014 1 2.66498e+01 4.29484e-01 3584 2014 2 2.64969e+01 5.22478e-01 3638 2014 3 2.68588e+01 6.15398e-01 3543 2014 4 2.71002e+01 6.20198e-01 2914 2014 5 2.77117e+01 7.71830e-01 2475 2014 6 2.78837e+01 1.12622e+00 1331 2014 7 2.81274e+01 6.94244e-01 2249 2014 8 2.82604e+01 7.80165e-01 2019 2014 9 2.85636e+01 1.01388e+00 1970 2014 10 2.92892e+01 8.52952e-01 2893 2014 11 2.87358e+01 7.21208e-01 3045 2014 12 2.76343e+01 7.15851e-01 3396 2015 1 2.68721e+01 5.30006e-01 3136 2015 2 2.69510e+01 5.91591e-01 2705 2015 3 2.68395e+01 5.43012e-01 3249 2015 4 2.70155e+01 6.47422e-01 3116 2015 5 2.74325e+01 6.45082e-01 2041 2015 6 2.79530e+01 8.89554e-01 1379 2015 7 2.75700e+01 9.21193e-01 2430 2015 8 2.83039e+01 7.36525e-01 2599 2015 9 2.92579e+01 7.69370e-01 3015 2015 10 2.96659e+01 8.30670e-01 2503 2015 11 2.84783e+01 6.88517e-01 1874 2015 12 2.76213e+01 5.96690e-01 2304 2016 1 2.69516e+01 6.61527e-01 2607 2016 2 2.69417e+01 5.07736e-01 2691 2016 3 2.69622e+01 6.15879e-01 2984 2016 4 2.76091e+01 8.41375e-01 2107 2016 5 2.79708e+01 8.05946e-01 1303 2016 6 2.81097e+01 9.76282e-01 1696 2016 7 2.85377e+01 6.79183e-01 2608 2016 8 2.88686e+01 5.78629e-01 2270 2016 9 2.96112e+01 7.12734e-01 2991 2016 10 2.92973e+01 1.17987e+00 1799 2016 11 2.87956e+01 7.09441e-01 1424 2016 12 2.78002e+01 5.61692e-01 3159 2017 1 2.68950e+01 4.93926e-01 2898 2017 2 2.67586e+01 6.33244e-01 3291 2017 3 2.69987e+01 6.48438e-01 2127 2017 4 2.75020e+01 9.06679e-01 2416 2017 5 2.79435e+01 6.81829e-01 2560 2017 6 2.83101e+01 7.19930e-01 2553 2017 7 2.87061e+01 7.48941e-01 2495 2017 8 2.88983e+01 6.81625e-01 2734 2017 9 2.89332e+01 1.01925e+00 817 2017 10 2.86444e+01 8.52901e-01 2068 2017 11 2.84654e+01 7.46141e-01 2002 2017 12 2.78787e+01 6.09873e-01 3321 2018 1 2.69181e+01 6.61082e-01 2491 2018 2 2.63168e+01 4.88657e-01 2870 2018 3 2.68235e+01 1.07638e+00 3233 2018 4 2.74362e+01 5.93838e-01 2945 2018 5 2.74408e+01 8.10521e-01 2853 2018 6 2.78222e+01 9.08068e-01 1800 2018 7 2.76958e+01 6.84664e-01 1154 2018 8 2.84380e+01 7.08045e-01 2664 2018 9 2.90974e+01 7.18237e-01 2258 2018 10 2.87457e+01 7.65998e-01 1794 2018 11 2.83842e+01 7.13676e-01 3178 2018 12 2.73350e+01 6.41503e-01 3804 2019 1 2.64424e+01 6.45407e-01 2738 2019 2 2.64883e+01 5.55031e-01 2723 2019 3 2.66267e+01 7.39240e-01 3083 2019 4 2.71968e+01 5.54925e-01 3062 2019 5 2.76228e+01 9.79881e-01 1399 2019 6 2.81069e+01 7.54722e-01 2750 2019 7 2.84506e+01 6.98101e-01 2468 2019 8 2.87176e+01 8.03048e-01 2699 2019 9 2.94189e+01 7.04351e-01 1757 2019 10 2.94527e+01 7.81655e-01 2984 2019 11 2.90144e+01 4.94053e-01 3426 2019 12 2.82180e+01 9.23797e-01 3327 2020 1 2.71803e+01 6.66333e-01 3030 2020 2 2.69410e+01 5.34152e-01 3199 2020 3 2.72312e+01 7.14068e-01 2759 2020 4 2.79714e+01 7.35491e-01 3250 2020 5 2.83905e+01 8.20926e-01 1811 2020 6 2.88073e+01 9.76238e-01 2456 2020 7 2.86544e+01 6.77456e-01 2113 2020 8 2.91738e+01 6.36114e-01 2056 2020 9 2.97332e+01 8.08098e-01 2131 2020 10 2.90576e+01 7.77646e-01 2167 2020 11 2.81386e+01 7.35394e-01 1710 2020 12 2.76302e+01 5.33079e-01 3520 2021 1 2.68825e+01 6.33421e-01 3085 2021 2 2.65202e+01 4.86002e-01 3217 2021 3 2.68205e+01 5.66539e-01 3931 2021 4 2.73759e+01 7.27113e-01 2560 2021 5 2.76321e+01 8.60361e-01 2868 2021 6 2.78221e+01 9.24036e-01 1919 2021 7 2.80994e+01 7.48177e-01 2049 2021 8 2.85972e+01 7.25582e-01 2140 2021 9 2.96587e+01 8.72983e-01 3059 2021 10 2.92086e+01 8.20661e-01 2778 2021 11 2.87610e+01 6.59680e-01 2927 2021 12 2.77116e+01 6.24986e-01 3664 2022 1 2.69313e+01 4.84486e-01 3964 2022 2 2.68571e+01 5.60132e-01 2980 2022 3 2.67931e+01 7.91270e-01 2974 2022 4 2.73457e+01 9.09069e-01 1071 2022 5 2.76285e+01 8.27579e-01 2612 2022 6 2.82549e+01 8.30384e-01 2162 2022 7 2.81373e+01 5.58975e-01 2057 2022 8 2.88286e+01 9.74123e-01 2180 2022 9 2.92855e+01 1.01571e+00 1732 2022 10 2.92631e+01 6.01938e-01 1591 2022 11 2.80304e+01 6.94373e-01 2987 2022 12 2.71572e+01 5.02491e-01 3582 2023 1 2.67134e+01 5.39183e-01 3240 2023 2 2.62208e+01 5.06188e-01 2958 2023 3 2.65872e+01 6.67685e-01 3276 2023 4 2.71549e+01 6.62033e-01 2968 2023 5 2.86586e+01 8.50646e-01 2879 2023 6 2.89077e+01 6.87823e-01 2334 2023 7 2.88883e+01 8.25936e-01 1572 2023 8 2.96167e+01 6.36969e-01 2150 2023 9 3.01762e+01 8.03210e-01 2671 2023 10 3.02739e+01 8.77327e-01 2068 2023 11 2.89182e+01 7.32877e-01 2612 2023 12 2.81362e+01 6.16391e-01 3158 2024 1 2.74033e+01 5.58983e-01 3439 2024 2 2.71954e+01 5.85358e-01 2453 2024 3 2.74698e+01 7.81122e-01 3316 2024 4 2.75918e+01 6.11760e-01 380