YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.91958e+01 4.12540e-01 177 2000 3 2.11575e+01 3.65186e-01 494 2000 4 2.25569e+01 4.50479e-01 696 2000 5 2.41483e+01 1.72893e+00 620 2000 6 2.69525e+01 1.17183e+00 509 2000 7 2.89537e+01 8.12661e-01 576 2000 8 2.98535e+01 6.59854e-01 568 2000 9 2.89097e+01 7.06770e-01 292 2000 10 2.65427e+01 1.04349e+00 801 2000 11 2.42563e+01 1.07266e+00 513 2000 12 2.17996e+01 1.20283e+00 657 2001 1 1.76384e+01 1.05691e+00 455 2001 2 1.88651e+01 9.44367e-01 273 2001 3 1.87832e+01 6.48641e-01 521 2001 4 2.12528e+01 1.53740e+00 765 2001 5 2.38544e+01 1.88030e+00 780 2001 6 2.77567e+01 9.39840e-01 375 2001 7 2.75874e+01 1.24148e+00 440 2001 8 2.93756e+01 1.25331e+00 551 2001 9 2.88761e+01 6.00403e-01 394 2001 10 2.63025e+01 1.26313e+00 413 2001 11 2.31224e+01 6.99394e-01 832 2001 12 2.33431e+01 8.54955e-01 642 2002 1 1.98995e+01 9.94122e-01 448 2002 2 1.88908e+01 7.63286e-01 343 2002 3 1.86993e+01 1.58944e+00 175 2002 4 2.26916e+01 2.07872e+00 576 2002 5 2.55816e+01 5.50817e-01 768 2002 6 2.70939e+01 1.22222e+00 573 2002 7 2.87096e+01 1.48802e+00 1627 2002 8 2.93019e+01 1.07491e+00 1586 2002 9 2.88857e+01 1.29898e+00 1791 2002 10 2.85503e+01 9.01359e-01 3384 2002 11 2.54694e+01 1.83497e+00 1824 2002 12 2.02220e+01 1.12937e+00 1617 2003 1 1.71250e+01 1.30654e+00 1632 2003 2 1.60879e+01 9.61815e-01 1167 2003 3 2.04959e+01 1.49188e+00 1047 2003 4 2.15787e+01 1.67799e+00 2516 2003 5 2.62195e+01 1.61780e+00 3583 2003 6 2.78865e+01 1.02396e+00 1649 2003 7 2.93707e+01 1.41149e+00 1478 2003 8 2.93539e+01 1.11678e+00 2045 2003 9 2.87889e+01 9.69478e-01 1760 2003 10 2.66593e+01 1.12300e+00 2662 2003 11 2.40896e+01 9.04091e-01 2746 2003 12 1.96503e+01 1.72006e+00 1640 2004 1 1.81375e+01 8.99120e-01 2261 2004 2 1.74598e+01 1.23557e+00 993 2004 3 1.94610e+01 8.44064e-01 2607 2004 4 2.08900e+01 1.05421e+00 2786 2004 5 2.48225e+01 1.51894e+00 3776 2004 6 2.87651e+01 1.26756e+00 3087 2004 7 2.98669e+01 1.26675e+00 1659 2004 8 2.96680e+01 1.21178e+00 2171 2004 9 2.79213e+01 1.61884e+00 2499 2004 10 2.67305e+01 1.30661e+00 3116 2004 11 2.48448e+01 9.48140e-01 2558 2004 12 2.06454e+01 2.00588e+00 1725 2005 1 1.78753e+01 9.23531e-01 1804 2005 2 1.72723e+01 9.28880e-01 1906 2005 3 1.82489e+01 1.57788e+00 1227 2005 4 2.07458e+01 7.26336e-01 3006 2005 5 2.37967e+01 1.65054e+00 2930 2005 6 2.70725e+01 1.42794e+00 1964 2005 7 2.87503e+01 1.44265e+00 2708 2005 8 3.07221e+01 1.47202e+00 2011 2005 9 2.85237e+01 9.52897e-01 2894 2005 10 2.69068e+01 1.07782e+00 2520 2005 11 2.37504e+01 1.06961e+00 2458 2005 12 2.02982e+01 1.92772e+00 1910 2006 1 1.81536e+01 9.96457e-01 1875 2006 2 1.76247e+01 7.70610e-01 1748 2006 3 1.92271e+01 1.00726e+00 2669 2006 4 2.28616e+01 1.75373e+00 3192 2006 5 2.50590e+01 1.07210e+00 3198 2006 6 2.73951e+01 1.16636e+00 2534 2006 7 2.91842e+01 1.10021e+00 2156 2006 8 2.99728e+01 1.16677e+00 2502 2006 9 2.97385e+01 7.31483e-01 2374 2006 10 2.79792e+01 1.32565e+00 3439 2006 11 2.34315e+01 1.59075e+00 2300 2006 12 2.00474e+01 9.83358e-01 1156 2007 1 2.00883e+01 1.25662e+00 1662 2007 2 1.82263e+01 1.20403e+00 1444 2007 3 1.97129e+01 1.04832e+00 2407 2007 4 2.13177e+01 1.68796e+00 2331 2007 5 2.35417e+01 1.15616e+00 3663 2007 6 2.67225e+01 1.32352e+00 2877 2007 7 3.00104e+01 1.54921e+00 2568 2007 8 3.00900e+01 8.79229e-01 3084 2007 9 2.95141e+01 8.89376e-01 2198 2007 10 2.78634e+01 1.15397e+00 2309 2007 11 2.43767e+01 1.06364e+00 3350 2007 12 2.22935e+01 9.81845e-01 2845 2008 1 1.94730e+01 1.24446e+00 1657 2008 2 1.98421e+01 7.72347e-01 2024 2008 3 1.94049e+01 1.10492e+00 2200 2008 4 2.23624e+01 9.92952e-01 3120 2008 5 2.48127e+01 1.60331e+00 3082 2008 6 2.82269e+01 1.15042e+00 2476 2008 7 2.88815e+01 1.14142e+00 1911 2008 8 2.95293e+01 9.24996e-01 1882 2008 9 2.87225e+01 9.78604e-01 2076 2008 10 2.67913e+01 1.10174e+00 3286 2008 11 2.23929e+01 1.30819e+00 2488 2008 12 1.97531e+01 8.22610e-01 2201 2009 1 1.82159e+01 1.51316e+00 2156 2009 2 1.69063e+01 6.78007e-01 2187 2009 3 1.89909e+01 1.78116e+00 2441 2009 4 2.19074e+01 1.09979e+00 2671 2009 5 2.53140e+01 1.36983e+00 2946 2009 6 2.81206e+01 1.33521e+00 2925 2009 7 2.93095e+01 1.44748e+00 2168 2009 8 2.97401e+01 9.24986e-01 2417 2009 9 2.94924e+01 9.12342e-01 2125 2009 10 2.82036e+01 1.72182e+00 2836 2009 11 2.44002e+01 1.59640e+00 1197 2009 12 1.99055e+01 1.29853e+00 899 2010 1 1.63122e+01 1.48485e+00 1575 2010 2 1.50207e+01 9.71000e-01 1024 2010 3 1.52612e+01 1.56998e+00 1994 2010 4 2.05568e+01 2.00098e+00 1878 2010 5 2.58171e+01 1.83702e+00 3126 2010 6 2.92484e+01 1.11193e+00 2994 2010 7 2.88918e+01 9.62444e-01 2376 2010 8 2.97070e+01 1.58203e+00 1635 2010 9 2.91331e+01 1.15392e+00 2360 2010 10 2.67183e+01 1.09084e+00 3906 2010 11 2.36745e+01 9.47210e-01 3187 2010 12 1.90983e+01 2.03535e+00 2578 2011 1 1.55592e+01 9.86898e-01 1585 2011 2 1.61655e+01 1.21775e+00 1297 2011 3 1.96908e+01 1.38178e+00 2656 2011 4 2.32539e+01 1.43076e+00 3053 2011 5 2.63932e+01 1.17386e+00 3659 2011 6 2.84651e+01 1.43247e+00 2559 2011 7 2.94074e+01 1.40945e+00 1631 2011 8 3.01469e+01 1.03512e+00 2208 2011 9 2.92875e+01 9.04380e-01 2282 2011 10 2.68602e+01 1.76650e+00 2276 2011 11 2.27683e+01 8.99728e-01 2801 2011 12 2.03755e+01 6.66407e-01 2278 2012 1 1.88445e+01 6.98153e-01 1946 2012 2 1.87779e+01 1.02610e+00 1227 2012 3 2.18098e+01 1.12459e+00 3174 2012 4 2.37567e+01 8.23883e-01 3375 2012 5 2.60917e+01 1.00520e+00 2780 2012 6 2.75856e+01 9.34210e-01 2056 2012 7 2.86373e+01 1.57800e+00 2071 2012 8 2.97539e+01 1.28854e+00 1970 2012 9 2.84520e+01 8.81336e-01 1814 2012 10 2.70111e+01 1.00326e+00 2562 2012 11 2.24299e+01 1.24022e+00 2579 2012 12 2.02438e+01 1.40624e+00 2225 2013 1 1.97061e+01 8.05060e-01 1844 2013 2 1.89057e+01 1.11712e+00 1866 2013 3 1.84926e+01 1.03657e+00 2118 2013 4 2.11419e+01 2.02509e+00 1760 2013 5 2.43333e+01 1.52574e+00 3158 2013 6 2.79677e+01 1.66499e+00 2565 2013 7 2.86123e+01 1.45830e+00 1589 2013 8 2.97576e+01 1.12151e+00 2510 2013 9 2.98143e+01 1.02966e+00 2949 2013 10 2.78060e+01 1.01266e+00 2884 2013 11 2.39423e+01 1.58394e+00 1595 2013 12 2.11836e+01 1.07835e+00 2188 2014 1 1.79504e+01 1.51604e+00 1695 2014 2 1.77343e+01 9.19748e-01 1249 2014 3 1.94688e+01 5.57747e-01 1757 2014 4 2.14008e+01 1.70935e+00 2156 2014 5 2.47808e+01 8.61229e-01 2061 2014 6 2.79050e+01 1.31459e+00 2456 2014 7 3.01207e+01 1.52054e+00 2163 2014 8 3.05495e+01 9.97760e-01 2919 2014 9 2.98201e+01 1.34425e+00 1482 2014 10 2.79512e+01 1.12071e+00 2678 2014 11 2.33137e+01 1.55679e+00 2178 2014 12 2.03675e+01 7.34829e-01 1660 2015 1 1.85679e+01 1.04330e+00 1940 2015 2 1.73523e+01 8.00344e-01 1850 2015 3 2.09045e+01 1.70654e+00 2445 2015 4 2.37954e+01 2.08992e+00 2059 2015 5 2.67309e+01 1.22626e+00 3792 2015 6 2.93082e+01 1.44859e+00 2423 2015 7 2.99116e+01 1.55241e+00 1820 2015 8 2.96637e+01 1.45486e+00 1992 2015 9 2.95416e+01 9.62403e-01 1685 2015 10 2.74411e+01 9.77231e-01 2296 2015 11 2.58021e+01 1.18249e+00 2759 2015 12 2.30510e+01 6.45016e-01 1781 2016 1 2.15879e+01 1.50897e+00 905 2016 2 1.81569e+01 1.17467e+00 1890 2016 3 1.86928e+01 1.17961e+00 1122 2016 4 2.23324e+01 1.59781e+00 2763 2016 5 2.52002e+01 1.64179e+00 3074 2016 6 2.80856e+01 1.29541e+00 2508 2016 7 3.05314e+01 9.50007e-01 2202 2016 8 3.01272e+01 1.34295e+00 2035 2016 9 2.94271e+01 1.06508e+00 2452 2016 10 2.67381e+01 1.32728e+00 2752 2016 11 2.39646e+01 1.22317e+00 3044 2016 12 2.14919e+01 8.22276e-01 2474 2017 1 1.94837e+01 7.75351e-01 1919 2017 2 1.95047e+01 6.17066e-01 2412 2017 3 2.02996e+01 1.01894e+00 2970 2017 4 2.24058e+01 1.20560e+00 2908 2017 5 2.56161e+01 1.45078e+00 2689 2017 6 2.86784e+01 1.61503e+00 1121 2017 7 3.02914e+01 1.01469e+00 2118 2017 8 3.05717e+01 9.92655e-01 2080 2017 9 2.97347e+01 8.51985e-01 2709 2017 10 2.72270e+01 1.15065e+00 2327 2017 11 2.42253e+01 9.20415e-01 2940 2017 12 2.25030e+01 1.29047e+00 2473 2018 1 1.77488e+01 1.56790e+00 1729 2018 2 2.01324e+01 2.44305e+00 2255 2018 3 2.04016e+01 9.96065e-01 2901 2018 4 2.22529e+01 1.12806e+00 2627 2018 5 2.40539e+01 1.41770e+00 1822 2018 6 2.82053e+01 1.60371e+00 2627 2018 7 2.90825e+01 1.19975e+00 2113 2018 8 2.99747e+01 1.09250e+00 2305 2018 9 2.96011e+01 1.17749e+00 2397 2018 10 2.78216e+01 1.25336e+00 3231 2018 11 2.50813e+01 1.37848e+00 1764 2018 12 2.12039e+01 1.50563e+00 1970 2019 1 1.92502e+01 1.50003e+00 2036 2019 2 1.89866e+01 1.56872e+00 1442 2019 3 2.05523e+01 6.57029e-01 2487 2019 4 2.32407e+01 1.07689e+00 2299 2019 5 2.63347e+01 1.42356e+00 3100 2019 6 2.93551e+01 1.40302e+00 1925 2019 7 2.99401e+01 9.20014e-01 1904 2019 8 3.02733e+01 8.74199e-01 1638 2019 9 2.93935e+01 7.54403e-01 3278 2019 10 2.78987e+01 8.30862e-01 2736 2019 11 2.55453e+01 1.78667e+00 2110 2019 12 2.16448e+01 1.53107e+00 1710 2020 1 1.99819e+01 1.16929e+00 2702 2020 2 1.90605e+01 1.04585e+00 1858 2020 3 2.11371e+01 2.44708e+00 2863 2020 4 2.39517e+01 9.80552e-01 1790 2020 5 2.48598e+01 1.00144e+00 3180 2020 6 2.87577e+01 1.42850e+00 2029 2020 7 2.99090e+01 1.02532e+00 2317 2020 8 3.07539e+01 1.00463e+00 1479 2020 9 2.96631e+01 1.80138e+00 1307 2020 10 2.76727e+01 8.44525e-01 2097 2020 11 2.51669e+01 1.08729e+00 2476 2020 12 2.05426e+01 1.17237e+00 2400 2021 1 1.91215e+01 7.68765e-01 1758 2021 2 1.87353e+01 8.06432e-01 1919 2021 3 1.99722e+01 8.89964e-01 2642 2021 4 2.19837e+01 1.61375e+00 2854 2021 5 2.55292e+01 9.94025e-01 3434 2021 6 2.72880e+01 8.90602e-01 1514 2021 7 2.94399e+01 1.13478e+00 2125 2021 8 3.02041e+01 1.18148e+00 1934 2021 9 2.94116e+01 8.47885e-01 2230 2021 10 2.88642e+01 8.41565e-01 2260 2021 11 2.38074e+01 1.38722e+00 2200 2021 12 2.18232e+01 5.81874e-01 2749 2022 1 2.06266e+01 1.38493e+00 2618 2022 2 1.83273e+01 1.36859e+00 2570 2022 3 2.05218e+01 8.91980e-01 3518 2022 4 2.32451e+01 9.55789e-01 1950 2022 5 2.61794e+01 1.21374e+00 2984 2022 6 2.87625e+01 1.41608e+00 2475 2022 7 3.05234e+01 1.13386e+00 2582 2022 8 3.08460e+01 1.09943e+00 2066 2022 9 3.03554e+01 1.16444e+00 2350 2022 10 2.71660e+01 1.16875e+00 2954 2022 11 2.50895e+01 1.28419e+00 2138 2022 12 2.27710e+01 1.35994e+00 2655 2023 1 1.96008e+01 1.36454e+00 2391 2023 2 1.98613e+01 1.14885e+00 2982 2023 3 2.26422e+01 7.29209e-01 3539 2023 4 2.41925e+01 8.19321e-01 2188 2023 5 2.61091e+01 1.30172e+00 3623 2023 6 2.76571e+01 1.24822e+00 2954 2023 7 3.04426e+01 1.03790e+00 2436 2023 8 3.16926e+01 1.04931e+00 2566 2023 9 3.09397e+01 8.78889e-01 2464 2023 10 2.72775e+01 1.48515e+00 2634 2023 11 2.50207e+01 1.25626e+00 2024 2023 12 2.08164e+01 1.86337e+00 743 2024 1 1.94781e+01 6.63378e-01 1044 2024 2 1.84728e+01 8.13155e-01 2274 2024 3 2.11586e+01 1.11416e+00 1785 2024 4 2.20885e+01 6.37724e-01 214