YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.82964e+01 2.59479e-01 176 2000 3 1.76560e+01 1.05738e+00 1308 2000 4 2.04615e+01 1.89985e+00 136 2000 5 2.60759e+01 1.75095e+00 509 2000 6 2.85864e+01 7.98875e-01 407 2000 7 3.18896e+01 1.49322e+00 747 2000 8 3.33290e+01 1.01288e+00 890 2000 9 3.02047e+01 7.37306e-01 1641 2000 10 2.89893e+01 6.17074e-01 2127 2000 11 2.56051e+01 1.18462e+00 1165 2000 12 2.22206e+01 1.14045e+00 1198 2001 1 1.96162e+01 5.73151e-01 2440 2001 2 1.82209e+01 8.08115e-01 1483 2001 3 1.90583e+01 8.78260e-01 1572 2001 4 2.18684e+01 8.74898e-01 1051 2001 5 2.55067e+01 1.49540e+00 892 2001 6 2.74843e+01 8.30454e-01 342 2001 7 3.12152e+01 1.50745e+00 1587 2001 8 3.24536e+01 1.00573e+00 2038 2001 9 3.18138e+01 5.47967e-01 2734 2001 10 3.02401e+01 7.75414e-01 2429 2001 11 2.73231e+01 2.18282e+00 2433 2001 12 2.25349e+01 1.03517e+00 1332 2002 1 1.99243e+01 7.60599e-01 1928 2002 2 1.89766e+01 6.56935e-01 1564 2002 3 1.90839e+01 9.31008e-01 831 2002 4 2.06973e+01 1.93197e+00 727 2002 5 2.65257e+01 1.13061e+00 1824 2002 6 2.91551e+01 1.22346e+00 1323 2002 7 3.16968e+01 9.33205e-01 3622 2002 8 3.15299e+01 8.33148e-01 4131 2002 9 3.04396e+01 7.85610e-01 4257 2002 10 2.98681e+01 9.41871e-01 5035 2002 11 2.71284e+01 1.35907e+00 4533 2002 12 2.25906e+01 1.30070e+00 2860 2003 1 2.01645e+01 9.33487e-01 2907 2003 2 1.82828e+01 9.32937e-01 2335 2003 3 1.77927e+01 1.32262e+00 2027 2003 4 2.05159e+01 1.82555e+00 1533 2003 5 2.47682e+01 2.14258e+00 1768 2003 6 2.85370e+01 1.61313e+00 2012 2003 7 3.04325e+01 1.15032e+00 3541 2003 8 3.21825e+01 9.89764e-01 4261 2003 9 3.04917e+01 9.62904e-01 4997 2003 10 2.97808e+01 6.92506e-01 5783 2003 11 2.65663e+01 1.63262e+00 4205 2003 12 2.27733e+01 1.41374e+00 2278 2004 1 1.97367e+01 9.45921e-01 2708 2004 2 1.85386e+01 8.97888e-01 2725 2004 3 1.94419e+01 9.07327e-01 2838 2004 4 2.10001e+01 1.07982e+00 1983 2004 5 2.48617e+01 1.73075e+00 2470 2004 6 2.86364e+01 1.57553e+00 2659 2004 7 3.15184e+01 1.05973e+00 4751 2004 8 3.15160e+01 6.94646e-01 4581 2004 9 3.08687e+01 8.78610e-01 4308 2004 10 2.94446e+01 1.26589e+00 4444 2004 11 2.75110e+01 1.65490e+00 3241 2004 12 2.25068e+01 1.92289e+00 3016 2005 1 1.79012e+01 1.43959e+00 3233 2005 2 1.71373e+01 6.97137e-01 2395 2005 3 1.82953e+01 8.65802e-01 2938 2005 4 2.08594e+01 1.66811e+00 1893 2005 5 2.52584e+01 1.99298e+00 2400 2005 6 2.86162e+01 1.15318e+00 2763 2005 7 3.04265e+01 1.70146e+00 2568 2005 8 3.15394e+01 9.99530e-01 3981 2005 9 3.03336e+01 1.06256e+00 4751 2005 10 2.82991e+01 1.04934e+00 5082 2005 11 2.53567e+01 1.23123e+00 3028 2005 12 2.32058e+01 1.01515e+00 3865 2006 1 1.97141e+01 1.37354e+00 2967 2006 2 1.82519e+01 1.05060e+00 2112 2006 3 1.88840e+01 9.81282e-01 2897 2006 4 2.17008e+01 1.20033e+00 1914 2006 5 2.68633e+01 1.61226e+00 3116 2006 6 2.99648e+01 1.12446e+00 3559 2006 7 3.08416e+01 1.24028e+00 3245 2006 8 3.22066e+01 1.19741e+00 4185 2006 9 3.16314e+01 8.76810e-01 5183 2006 10 2.98904e+01 6.87172e-01 3893 2006 11 2.71791e+01 1.49550e+00 4025 2006 12 2.23012e+01 1.76040e+00 2773 2007 1 1.82649e+01 1.10220e+00 2500 2007 2 1.72279e+01 8.13150e-01 2841 2007 3 1.79715e+01 1.19088e+00 2369 2007 4 1.96363e+01 1.06097e+00 1304 2007 5 2.70370e+01 2.04910e+00 2060 2007 6 2.96037e+01 1.07357e+00 2953 2007 7 3.08596e+01 1.30160e+00 4474 2007 8 3.22085e+01 9.62073e-01 4492 2007 9 3.20796e+01 9.77667e-01 4827 2007 10 2.99766e+01 7.29635e-01 5699 2007 11 2.74523e+01 1.48220e+00 4972 2007 12 2.25896e+01 1.48690e+00 3179 2008 1 1.87588e+01 9.44938e-01 1969 2008 2 1.73927e+01 8.95618e-01 2545 2008 3 1.80923e+01 1.34472e+00 1155 2008 4 2.10956e+01 1.59665e+00 1605 2008 5 2.55189e+01 1.86813e+00 2178 2008 6 2.85283e+01 9.52684e-01 1432 2008 7 3.07596e+01 1.39169e+00 2910 2008 8 3.18607e+01 1.16568e+00 3739 2008 9 3.14498e+01 1.54056e+00 3860 2008 10 2.89091e+01 8.91937e-01 3865 2008 11 2.55982e+01 1.23748e+00 3336 2008 12 2.19344e+01 1.50495e+00 4333 2009 1 1.84214e+01 1.18029e+00 3537 2009 2 1.69095e+01 8.92906e-01 1656 2009 3 1.72928e+01 1.40451e+00 2064 2009 4 1.98214e+01 1.66811e+00 1887 2009 5 2.60954e+01 2.53567e+00 1794 2009 6 2.85304e+01 2.13159e+00 1994 2009 7 2.98894e+01 1.16014e+00 1936 2009 8 3.03809e+01 9.28796e-01 3801 2009 9 3.03580e+01 1.00492e+00 4380 2009 10 2.84448e+01 8.60218e-01 2951 2009 11 2.69163e+01 8.84625e-01 3698 2009 12 2.29122e+01 1.49541e+00 3264 2010 1 2.04665e+01 1.25462e+00 3185 2010 2 1.91474e+01 1.18258e+00 2403 2010 3 1.98802e+01 1.65659e+00 2398 2010 4 2.21314e+01 1.71464e+00 2042 2010 5 2.57521e+01 1.37113e+00 1946 2010 6 2.87798e+01 9.32246e-01 1773 2010 7 3.09019e+01 1.18467e+00 2513 2010 8 3.30405e+01 1.28067e+00 4303 2010 9 3.22419e+01 1.26685e+00 4788 2010 10 3.05894e+01 1.09687e+00 5143 2010 11 2.76257e+01 1.22474e+00 5465 2010 12 2.38124e+01 1.70987e+00 4335 2011 1 2.03986e+01 1.14256e+00 2848 2011 2 1.76061e+01 9.90720e-01 2716 2011 3 1.83704e+01 1.00686e+00 2684 2011 4 2.08673e+01 1.39292e+00 1078 2011 5 2.60516e+01 2.62171e+00 2112 2011 6 2.86721e+01 1.28107e+00 1504 2011 7 3.10449e+01 1.74861e+00 3146 2011 8 3.23579e+01 1.10595e+00 4988 2011 9 3.13571e+01 7.52306e-01 4726 2011 10 2.90169e+01 1.31717e+00 5154 2011 11 2.52939e+01 1.41000e+00 3003 2011 12 2.13850e+01 1.20652e+00 4508 2012 1 1.79223e+01 1.07391e+00 3210 2012 2 1.69644e+01 1.00958e+00 2282 2012 3 1.64212e+01 1.18650e+00 2168 2012 4 1.96480e+01 1.67919e+00 1416 2012 5 2.49969e+01 1.94408e+00 1094 2012 6 2.90579e+01 1.68198e+00 2264 2012 7 3.21170e+01 1.79313e+00 3992 2012 8 3.21412e+01 9.61210e-01 4193 2012 9 3.10784e+01 9.43302e-01 4374 2012 10 3.05449e+01 9.07529e-01 4896 2012 11 2.85914e+01 1.28759e+00 2802 2012 12 2.34199e+01 1.38106e+00 2824 2013 1 2.01881e+01 1.27981e+00 2847 2013 2 1.93200e+01 9.74706e-01 2948 2013 3 1.91738e+01 1.17811e+00 2638 2013 4 2.17945e+01 1.57953e+00 1941 2013 5 2.55304e+01 2.35574e+00 3380 2013 6 2.82408e+01 9.91520e-01 1955 2013 7 3.08477e+01 8.10224e-01 3398 2013 8 3.23645e+01 8.76603e-01 4621 2013 9 3.15129e+01 9.48176e-01 5529 2013 10 2.85598e+01 1.23895e+00 4765 2013 11 2.55703e+01 8.09090e-01 3491 2013 12 2.22507e+01 1.38678e+00 4303 2014 1 1.91000e+01 1.04725e+00 2859 2014 2 1.74966e+01 6.40658e-01 2660 2014 3 1.91703e+01 1.47141e+00 2504 2014 4 2.12126e+01 1.87927e+00 1689 2014 5 2.67554e+01 1.65666e+00 2763 2014 6 2.96059e+01 1.11813e+00 3418 2014 7 3.11326e+01 7.95479e-01 4442 2014 8 3.18404e+01 1.12916e+00 5103 2014 9 3.19712e+01 9.21871e-01 5637 2014 10 3.06252e+01 1.01576e+00 5624 2014 11 2.69588e+01 1.22117e+00 4283 2014 12 2.29344e+01 1.13069e+00 3983 2015 1 2.02988e+01 9.93608e-01 3729 2015 2 1.85906e+01 1.26723e+00 2283 2015 3 1.93647e+01 9.85138e-01 2375 2015 4 2.14506e+01 1.16985e+00 1621 2015 5 2.57674e+01 1.90440e+00 1896 2015 6 2.88251e+01 1.11398e+00 2968 2015 7 3.13633e+01 1.88156e+00 3592 2015 8 3.33699e+01 7.79155e-01 5772 2015 9 3.26875e+01 1.16463e+00 5274 2015 10 3.11393e+01 9.94013e-01 4818 2015 11 2.73984e+01 1.33219e+00 3490 2015 12 2.32253e+01 1.50320e+00 3380 2016 1 1.92178e+01 8.56408e-01 4073 2016 2 1.79345e+01 7.52887e-01 3681 2016 3 1.92667e+01 1.02962e+00 2520 2016 4 2.18458e+01 1.79054e+00 2957 2016 5 2.68055e+01 1.67805e+00 2735 2016 6 2.91425e+01 1.17847e+00 3144 2016 7 3.18187e+01 1.25033e+00 3803 2016 8 3.33049e+01 7.64528e-01 4941 2016 9 3.21693e+01 1.04452e+00 4673 2016 10 2.99189e+01 9.75674e-01 5037 2016 11 2.74304e+01 1.23921e+00 3239 2016 12 2.24599e+01 1.65894e+00 3182 2017 1 1.91805e+01 1.20973e+00 2386 2017 2 1.69213e+01 1.04806e+00 2585 2017 3 1.79524e+01 1.60033e+00 1933 2017 4 2.16407e+01 2.24345e+00 1467 2017 5 2.61941e+01 1.59833e+00 2635 2017 6 2.90037e+01 1.40680e+00 1970 2017 7 3.23477e+01 1.41167e+00 4276 2017 8 3.42616e+01 7.66354e-01 5189 2017 9 3.33309e+01 9.24430e-01 5635 2017 10 3.06425e+01 1.17679e+00 5440 2017 11 2.79201e+01 1.22054e+00 3992 2017 12 2.32278e+01 1.29617e+00 4368 2018 1 2.01987e+01 1.31362e+00 4296 2018 2 1.88301e+01 8.56493e-01 1959 2018 3 2.05728e+01 1.39674e+00 2909 2018 4 2.24219e+01 1.87680e+00 1795 2018 5 2.69055e+01 1.79751e+00 3221 2018 6 2.95816e+01 1.29065e+00 2474 2018 7 3.13810e+01 8.02560e-01 3931 2018 8 3.13831e+01 7.18392e-01 4254 2018 9 3.24983e+01 6.77928e-01 5254 2018 10 3.14966e+01 1.08835e+00 4854 2018 11 2.68716e+01 1.13102e+00 1741 2018 12 2.36495e+01 1.06354e+00 3330 2019 1 2.02812e+01 1.74431e+00 1514 2019 2 1.89117e+01 9.28853e-01 2715 2019 3 1.88961e+01 8.76649e-01 3299 2019 4 2.12550e+01 1.03446e+00 2845 2019 5 2.72841e+01 2.67051e+00 3675 2019 6 3.19532e+01 9.45618e-01 5176 2019 7 3.17127e+01 9.78794e-01 4663 2019 8 3.28988e+01 7.33600e-01 6137 2019 9 3.24371e+01 6.41213e-01 6578 2019 10 3.21125e+01 8.90199e-01 5302 2019 11 2.81888e+01 1.34080e+00 4414 2019 12 2.33213e+01 1.17532e+00 3930 2020 1 2.05453e+01 9.53248e-01 3979 2020 2 1.89373e+01 6.52501e-01 3826 2020 3 1.93929e+01 8.95375e-01 3939 2020 4 2.21122e+01 1.13379e+00 2917 2020 5 2.73358e+01 2.05598e+00 4917 2020 6 2.95724e+01 1.03069e+00 7183 2020 7 3.32685e+01 1.41968e+00 5772 2020 8 3.37014e+01 7.78874e-01 4904 2020 9 3.31071e+01 7.80333e-01 6589 2020 10 3.12650e+01 1.07828e+00 7620 2020 11 2.87534e+01 1.13418e+00 4002 2020 12 2.36031e+01 1.12345e+00 3920 2021 1 2.05355e+01 9.19218e-01 4727 2021 2 1.94142e+01 7.02230e-01 4461 2021 3 1.94407e+01 7.43013e-01 4224 2021 4 2.24092e+01 2.25329e+00 2837 2021 5 2.83325e+01 2.17613e+00 5183 2021 6 2.95873e+01 1.03628e+00 5977 2021 7 3.30166e+01 1.19907e+00 6436 2021 8 3.39622e+01 7.49355e-01 6682 2021 9 3.22965e+01 9.41605e-01 6422 2021 10 2.99931e+01 1.02215e+00 6703 2021 11 2.68344e+01 1.28992e+00 4943 2021 12 2.37824e+01 1.14279e+00 2866 2022 1 1.97725e+01 1.15343e+00 4082 2022 2 1.86430e+01 7.54958e-01 4612 2022 3 -6.75203e+01 2.82422e+02 3801 2022 4 2.13293e+01 1.46065e+00 1753 2022 5 2.51492e+01 1.22664e+00 3959 2022 6 2.97091e+01 1.00921e+00 5221 2022 7 3.11347e+01 1.36987e+00 3647 2022 8 3.37586e+01 8.14004e-01 5504 2022 9 3.27848e+01 9.41578e-01 5751 2022 10 3.11844e+01 6.22046e-01 4205 2022 11 2.80219e+01 1.12852e+00 2592 2022 12 2.42625e+01 1.29910e+00 3772 2023 1 2.06804e+01 8.75998e-01 2350 2023 2 1.87913e+01 8.01753e-01 2495 2023 3 2.03330e+01 7.56939e-01 4631 2023 4 2.25322e+01 1.86840e+00 4079 2023 5 2.62749e+01 1.61568e+00 4029 2023 6 2.97635e+01 9.19174e-01 5509 2023 7 3.22197e+01 1.17707e+00 5895 2023 8 3.41053e+01 8.13000e-01 5899 2023 9 3.31820e+01 7.04848e-01 6095 2023 10 3.13961e+01 9.63244e-01 6012 2023 11 2.80998e+01 1.33323e+00 3953 2023 12 2.45207e+01 1.12974e+00 4045 2024 1 2.12906e+01 1.11271e+00 4230 2024 2 1.99158e+01 5.73090e-01 4390 2024 3 1.98770e+01 5.81975e-01 3842 2024 4 2.20511e+01 8.15703e-01 803