YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.77739e+01 5.34643e-01 18 2000 3 1.72785e+01 7.61154e-01 1081 2000 4 2.11423e+01 2.37472e+00 303 2000 5 2.53427e+01 9.03224e-01 283 2000 6 2.81825e+01 9.18698e-01 359 2000 7 3.22976e+01 1.76064e+00 868 2000 8 3.35062e+01 1.08194e+00 983 2000 9 3.03609e+01 9.76300e-01 1703 2000 10 2.90104e+01 8.19771e-01 2089 2000 11 2.51697e+01 1.08443e+00 1097 2000 12 2.18133e+01 1.00832e+00 982 2001 1 1.98526e+01 6.83887e-01 1960 2001 2 1.80256e+01 6.70435e-01 1562 2001 3 1.94228e+01 9.61474e-01 1442 2001 4 2.25605e+01 9.99001e-01 1114 2001 5 2.54642e+01 1.23827e+00 736 2001 6 2.78822e+01 7.17080e-01 262 2001 7 3.15041e+01 1.48542e+00 1465 2001 8 3.31480e+01 1.08532e+00 2420 2001 9 3.17545e+01 8.22972e-01 2636 2001 10 2.99205e+01 6.97650e-01 2546 2001 11 2.69731e+01 2.06057e+00 2114 2001 12 2.24585e+01 8.79018e-01 995 2002 1 2.01838e+01 8.22614e-01 1299 2002 2 1.89392e+01 5.01624e-01 1382 2002 3 1.95479e+01 1.06290e+00 919 2002 4 2.19703e+01 1.32459e+00 1074 2002 5 2.66643e+01 1.07214e+00 1594 2002 6 2.91384e+01 1.06799e+00 1078 2002 7 3.16273e+01 9.73565e-01 3447 2002 8 3.15688e+01 1.05221e+00 4239 2002 9 3.13235e+01 8.70188e-01 5034 2002 10 3.05905e+01 9.20405e-01 5170 2002 11 2.68206e+01 1.48437e+00 4304 2002 12 2.22706e+01 1.53270e+00 2018 2003 1 1.96105e+01 8.42604e-01 2966 2003 2 1.82973e+01 8.33956e-01 2500 2003 3 1.80175e+01 1.18328e+00 2602 2003 4 2.21901e+01 1.59933e+00 1695 2003 5 2.53388e+01 1.49201e+00 2411 2003 6 2.84843e+01 1.39991e+00 1152 2003 7 3.00145e+01 1.19265e+00 2059 2003 8 3.27478e+01 1.03879e+00 4935 2003 9 3.11291e+01 1.01871e+00 4771 2003 10 2.99638e+01 7.62398e-01 5373 2003 11 2.63841e+01 1.84472e+00 3818 2003 12 2.20085e+01 1.33966e+00 1775 2004 1 1.98727e+01 6.95756e-01 2449 2004 2 1.86499e+01 1.34294e+00 2363 2004 3 1.97539e+01 1.05010e+00 2840 2004 4 2.06230e+01 1.17128e+00 1717 2004 5 2.43825e+01 1.14706e+00 1677 2004 6 2.84130e+01 1.38851e+00 2365 2004 7 3.18275e+01 1.34589e+00 3879 2004 8 3.17976e+01 9.24396e-01 4440 2004 9 3.08929e+01 1.08664e+00 4300 2004 10 2.97282e+01 1.10280e+00 4580 2004 11 2.73666e+01 1.64226e+00 3101 2004 12 2.10342e+01 9.79608e-01 1802 2005 1 1.83029e+01 1.36641e+00 2438 2005 2 1.75473e+01 6.97782e-01 1892 2005 3 1.86260e+01 8.33370e-01 2648 2005 4 2.16953e+01 2.15101e+00 2159 2005 5 2.59469e+01 2.51984e+00 2822 2005 6 2.80878e+01 1.20527e+00 1869 2005 7 3.13271e+01 1.71465e+00 1872 2005 8 3.15196e+01 1.14080e+00 3813 2005 9 3.07890e+01 9.59106e-01 4527 2005 10 2.86146e+01 1.00806e+00 4990 2005 11 2.55510e+01 9.81335e-01 2984 2005 12 2.33392e+01 8.92187e-01 3638 2006 1 1.98848e+01 1.42213e+00 2187 2006 2 1.80539e+01 8.00929e-01 2024 2006 3 1.90557e+01 1.08171e+00 2990 2006 4 2.19535e+01 1.44369e+00 2411 2006 5 2.61933e+01 1.17523e+00 2525 2006 6 3.01678e+01 8.27697e-01 3528 2006 7 3.07280e+01 1.53763e+00 2550 2006 8 3.24060e+01 1.51079e+00 3272 2006 9 3.20094e+01 1.01794e+00 4897 2006 10 2.94533e+01 7.55455e-01 3425 2006 11 2.69250e+01 2.07922e+00 3812 2006 12 2.10830e+01 1.58050e+00 1726 2007 1 1.72842e+01 8.90475e-01 2203 2007 2 1.76245e+01 1.11359e+00 2957 2007 3 1.84654e+01 1.28925e+00 2426 2007 4 2.02488e+01 1.55112e+00 1069 2007 5 2.64009e+01 2.08321e+00 2124 2007 6 2.94762e+01 8.87336e-01 2854 2007 7 3.01330e+01 1.39792e+00 3160 2007 8 3.26221e+01 1.06465e+00 4471 2007 9 3.26118e+01 1.01724e+00 5032 2007 10 3.04861e+01 7.05503e-01 6230 2007 11 2.68543e+01 1.41853e+00 4158 2007 12 2.18678e+01 1.12004e+00 2631 2008 1 1.82299e+01 1.35885e+00 1582 2008 2 1.63394e+01 1.02738e+00 2698 2008 3 1.83490e+01 1.90030e+00 1559 2008 4 2.19672e+01 1.46436e+00 1775 2008 5 2.55102e+01 1.33660e+00 1984 2008 6 2.77897e+01 8.67855e-01 709 2008 7 3.03725e+01 1.81728e+00 2381 2008 8 3.19430e+01 1.64972e+00 3470 2008 9 3.15291e+01 1.52303e+00 3449 2008 10 2.86683e+01 7.39242e-01 3799 2008 11 2.46680e+01 1.05884e+00 2877 2008 12 2.19600e+01 1.37302e+00 3845 2009 1 1.81273e+01 8.24519e-01 3130 2009 2 1.74493e+01 1.02144e+00 1535 2009 3 1.80543e+01 1.29237e+00 2069 2009 4 2.10288e+01 1.44309e+00 2201 2009 5 2.62497e+01 2.65535e+00 1835 2009 6 2.87369e+01 2.09841e+00 1909 2009 7 2.86932e+01 1.25240e+00 890 2009 8 3.07147e+01 1.45668e+00 3555 2009 9 3.03053e+01 8.98028e-01 4087 2009 10 2.84242e+01 8.07124e-01 3294 2009 11 2.72827e+01 1.22830e+00 3207 2009 12 2.19212e+01 9.38549e-01 2930 2010 1 2.00513e+01 8.50853e-01 2563 2010 2 1.89248e+01 1.19552e+00 1997 2010 3 2.05665e+01 1.49715e+00 2663 2010 4 2.20554e+01 1.61009e+00 1666 2010 5 2.58290e+01 1.35171e+00 2168 2010 6 2.88316e+01 1.02778e+00 1814 2010 7 3.07246e+01 1.26059e+00 1989 2010 8 3.32755e+01 1.28019e+00 4195 2010 9 3.25396e+01 1.29846e+00 4664 2010 10 2.99922e+01 1.16616e+00 4692 2010 11 2.74244e+01 1.04527e+00 4675 2010 12 2.32366e+01 1.75937e+00 3530 2011 1 1.97906e+01 1.06598e+00 2757 2011 2 1.79066e+01 9.39447e-01 1936 2011 3 1.86946e+01 1.21004e+00 2466 2011 4 2.13822e+01 1.43341e+00 1147 2011 5 2.58607e+01 2.28634e+00 1588 2011 6 2.84171e+01 9.54117e-01 1106 2011 7 3.14076e+01 1.96987e+00 3011 2011 8 3.26090e+01 9.28222e-01 4498 2011 9 3.15059e+01 8.93992e-01 4967 2011 10 2.84413e+01 1.53923e+00 4537 2011 11 2.48021e+01 1.28721e+00 2625 2011 12 2.09317e+01 1.33345e+00 3518 2012 1 1.85092e+01 1.20441e+00 2837 2012 2 1.68728e+01 8.59246e-01 1988 2012 3 1.63956e+01 1.47581e+00 1996 2012 4 2.09485e+01 1.88040e+00 1484 2012 5 2.48494e+01 1.41674e+00 1065 2012 6 2.89250e+01 1.33647e+00 2171 2012 7 3.23786e+01 2.13579e+00 3460 2012 8 3.26801e+01 1.08300e+00 4872 2012 9 3.16502e+01 9.31828e-01 5330 2012 10 3.06326e+01 1.02725e+00 4398 2012 11 2.84337e+01 1.34390e+00 3193 2012 12 2.27309e+01 1.10874e+00 2771 2013 1 2.02297e+01 1.02751e+00 2698 2013 2 1.88850e+01 9.93892e-01 3221 2013 3 1.93537e+01 1.19850e+00 2392 2013 4 2.25093e+01 1.60516e+00 1835 2013 5 2.50805e+01 1.91552e+00 3243 2013 6 2.82155e+01 9.98261e-01 1203 2013 7 3.10754e+01 9.57462e-01 3812 2013 8 3.24237e+01 1.03739e+00 5167 2013 9 3.18251e+01 1.05089e+00 5529 2013 10 2.76743e+01 1.19460e+00 4475 2013 11 2.51520e+01 8.28879e-01 3464 2013 12 2.15937e+01 1.97697e+00 2913 2014 1 1.90548e+01 8.12689e-01 2357 2014 2 1.83420e+01 7.95214e-01 2815 2014 3 1.96293e+01 1.26916e+00 2743 2014 4 2.20220e+01 1.42534e+00 1920 2014 5 2.70222e+01 1.48563e+00 3659 2014 6 2.92267e+01 1.31880e+00 2787 2014 7 3.09576e+01 9.05205e-01 4264 2014 8 3.20113e+01 1.22680e+00 3975 2014 9 3.18863e+01 1.01389e+00 5171 2014 10 3.05021e+01 1.05302e+00 5112 2014 11 2.58774e+01 1.25145e+00 3033 2014 12 2.22090e+01 9.45788e-01 3534 2015 1 1.98695e+01 9.70877e-01 2603 2015 2 1.90142e+01 1.33591e+00 2123 2015 3 1.98041e+01 1.03120e+00 2481 2015 4 2.14486e+01 1.10322e+00 1574 2015 5 2.63710e+01 1.49450e+00 2184 2015 6 2.86497e+01 8.97785e-01 2815 2015 7 3.18835e+01 2.00208e+00 2687 2015 8 3.36164e+01 7.85997e-01 5041 2015 9 3.28203e+01 1.27460e+00 5167 2015 10 3.09796e+01 1.06808e+00 4543 2015 11 2.62023e+01 1.42087e+00 3533 2015 12 2.26394e+01 1.41483e+00 2916 2016 1 1.94811e+01 8.20599e-01 3715 2016 2 1.79883e+01 7.83316e-01 3029 2016 3 2.01582e+01 1.02353e+00 2225 2016 4 2.26012e+01 1.83317e+00 3208 2016 5 2.68500e+01 1.34035e+00 2734 2016 6 2.85789e+01 1.46969e+00 2448 2016 7 3.16809e+01 1.34273e+00 3561 2016 8 3.38372e+01 7.98286e-01 5315 2016 9 3.22469e+01 1.39812e+00 5036 2016 10 2.91062e+01 1.01916e+00 4325 2016 11 2.71025e+01 1.11232e+00 2734 2016 12 2.27643e+01 1.62736e+00 2466 2017 1 2.00203e+01 1.19361e+00 2595 2017 2 1.74676e+01 8.72495e-01 1824 2017 3 1.95159e+01 1.45288e+00 1846 2017 4 2.20839e+01 1.15856e+00 1375 2017 5 2.70338e+01 1.77603e+00 2679 2017 6 2.82408e+01 2.23376e+00 821 2017 7 3.25936e+01 1.61613e+00 3657 2017 8 3.46499e+01 7.47585e-01 4222 2017 9 3.35688e+01 8.19124e-01 4994 2017 10 2.99359e+01 1.56092e+00 4706 2017 11 2.72212e+01 1.26938e+00 3274 2017 12 2.27476e+01 1.03077e+00 3972 2018 1 2.06093e+01 1.31489e+00 3880 2018 2 1.89726e+01 8.81558e-01 1926 2018 3 2.09927e+01 1.28039e+00 2968 2018 4 2.26561e+01 1.51323e+00 1692 2018 5 2.64865e+01 2.13176e+00 3313 2018 6 2.99938e+01 1.21884e+00 2439 2018 7 3.12676e+01 9.62927e-01 3825 2018 8 3.15871e+01 8.49879e-01 4726 2018 9 3.29498e+01 7.94189e-01 5858 2018 10 3.18207e+01 1.31876e+00 4939 2018 11 2.54740e+01 9.54290e-01 1351 2018 12 2.34888e+01 8.85688e-01 3235 2019 1 1.95797e+01 1.36016e+00 1511 2019 2 1.86893e+01 8.36672e-01 2300 2019 3 1.85564e+01 1.03423e+00 2607 2019 4 2.16712e+01 1.03439e+00 2612 2019 5 2.70370e+01 2.22817e+00 3390 2019 6 3.15449e+01 1.61260e+00 4288 2019 7 3.14616e+01 1.00844e+00 4382 2019 8 3.31203e+01 9.26339e-01 5635 2019 9 3.24203e+01 9.41424e-01 6451 2019 10 3.23482e+01 8.11846e-01 5281 2019 11 2.72278e+01 1.66191e+00 4691 2019 12 2.27226e+01 1.19375e+00 3667 2020 1 2.03399e+01 1.20845e+00 3564 2020 2 1.83333e+01 6.75590e-01 3785 2020 3 1.96871e+01 1.11215e+00 3673 2020 4 2.30444e+01 1.41871e+00 2881 2020 5 2.77554e+01 1.92812e+00 5239 2020 6 2.93948e+01 7.94570e-01 6606 2020 7 3.33885e+01 1.57361e+00 5324 2020 8 3.37694e+01 1.07658e+00 4524 2020 9 3.33861e+01 8.56672e-01 6372 2020 10 3.09703e+01 1.41054e+00 7182 2020 11 2.82576e+01 1.13486e+00 3246 2020 12 2.32536e+01 1.14352e+00 3656 2021 1 2.04658e+01 1.00196e+00 5076 2021 2 1.92560e+01 7.86575e-01 4701 2021 3 1.94230e+01 9.11436e-01 4273 2021 4 2.27464e+01 2.21663e+00 2691 2021 5 2.85594e+01 1.51321e+00 5207 2021 6 2.92866e+01 1.23876e+00 5552 2021 7 3.34471e+01 1.12250e+00 5737 2021 8 3.42422e+01 8.30044e-01 6354 2021 9 3.24825e+01 1.09930e+00 5790 2021 10 2.99132e+01 1.34018e+00 6447 2021 11 2.64571e+01 1.13741e+00 4779 2021 12 2.37819e+01 1.12292e+00 2625 2022 1 2.03690e+01 1.04056e+00 3776 2022 2 1.84788e+01 6.43927e-01 4783 2022 3 -7.17407e+01 2.90203e+02 3587 2022 4 2.24241e+01 1.36367e+00 1567 2022 5 2.47385e+01 1.05785e+00 3528 2022 6 2.91862e+01 1.03249e+00 5045 2022 7 3.18126e+01 1.65648e+00 3204 2022 8 3.44409e+01 7.60293e-01 5307 2022 9 3.29912e+01 1.05163e+00 5609 2022 10 3.08259e+01 5.34341e-01 4004 2022 11 2.76938e+01 1.43959e+00 2919 2022 12 2.42977e+01 1.17407e+00 4093 2023 1 2.07943e+01 1.03997e+00 2022 2023 2 1.89446e+01 7.13928e-01 2054 2023 3 2.05830e+01 8.06514e-01 4424 2023 4 2.26385e+01 1.87884e+00 4789 2023 5 2.59299e+01 1.70318e+00 4241 2023 6 2.92939e+01 1.00137e+00 5265 2023 7 3.21892e+01 1.38357e+00 5705 2023 8 3.45540e+01 7.81914e-01 6006 2023 9 3.32076e+01 8.49085e-01 5827 2023 10 3.11784e+01 1.03596e+00 5248 2023 11 2.74211e+01 1.37288e+00 4185 2023 12 2.39941e+01 9.10402e-01 4177 2024 1 2.14412e+01 8.13667e-01 4088 2024 2 2.02233e+01 4.77530e-01 4446 2024 3 2.00421e+01 8.64507e-01 3594 2024 4 2.18351e+01 7.57370e-01 793