YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.70366e+01 2.99702e-01 171 2000 3 1.70918e+01 8.59736e-01 1210 2000 4 2.16575e+01 3.29646e+00 120 2000 5 2.57051e+01 1.76153e+00 527 2000 6 2.81339e+01 8.69248e-01 314 2000 7 3.18643e+01 1.40712e+00 721 2000 8 3.34216e+01 1.11634e+00 921 2000 9 3.02072e+01 7.24203e-01 1758 2000 10 2.88145e+01 6.56830e-01 1991 2000 11 2.47685e+01 1.32096e+00 1054 2000 12 2.10749e+01 6.46370e-01 963 2001 1 1.90477e+01 8.13570e-01 1980 2001 2 1.73715e+01 8.84877e-01 1494 2001 3 1.91480e+01 1.11571e+00 1615 2001 4 2.18765e+01 9.19407e-01 760 2001 5 2.51725e+01 1.54878e+00 856 2001 6 2.72315e+01 6.34505e-01 317 2001 7 3.12318e+01 1.45690e+00 1340 2001 8 3.27940e+01 9.55620e-01 2031 2001 9 3.17223e+01 6.25229e-01 2668 2001 10 3.00861e+01 7.14350e-01 2432 2001 11 2.70762e+01 2.00636e+00 2069 2001 12 2.14050e+01 1.08052e+00 1386 2002 1 1.87868e+01 9.10052e-01 1635 2002 2 1.81674e+01 6.28832e-01 1547 2002 3 1.91948e+01 7.09168e-01 966 2002 4 2.06150e+01 1.94206e+00 820 2002 5 2.60503e+01 1.25600e+00 1610 2002 6 2.88855e+01 1.29272e+00 1300 2002 7 3.13361e+01 8.11402e-01 3017 2002 8 3.12015e+01 7.32800e-01 4257 2002 9 3.02267e+01 8.36887e-01 4261 2002 10 2.99201e+01 8.92308e-01 5160 2002 11 2.69525e+01 1.39214e+00 4837 2002 12 2.18888e+01 1.61996e+00 2461 2003 1 1.89272e+01 1.33177e+00 2595 2003 2 1.73995e+01 7.74785e-01 2374 2003 3 1.74564e+01 1.18449e+00 2122 2003 4 2.07781e+01 1.59040e+00 1618 2003 5 2.49910e+01 1.55274e+00 2259 2003 6 2.83077e+01 1.63776e+00 1855 2003 7 3.00269e+01 1.04703e+00 3312 2003 8 3.23183e+01 1.01299e+00 4514 2003 9 3.05688e+01 9.84518e-01 5026 2003 10 2.94956e+01 7.01450e-01 5584 2003 11 2.61275e+01 2.01701e+00 3319 2003 12 2.12264e+01 1.16219e+00 2064 2004 1 1.89149e+01 7.66019e-01 2965 2004 2 1.80794e+01 9.47976e-01 2715 2004 3 1.89363e+01 8.66324e-01 2810 2004 4 2.06255e+01 1.20750e+00 2001 2004 5 2.49645e+01 1.65900e+00 2404 2004 6 2.85442e+01 1.20636e+00 2633 2004 7 3.13986e+01 1.17355e+00 4503 2004 8 3.11707e+01 7.82111e-01 4546 2004 9 3.06013e+01 8.68044e-01 4191 2004 10 2.94917e+01 1.09450e+00 4525 2004 11 2.67902e+01 1.88314e+00 2432 2004 12 2.05105e+01 2.14575e+00 2767 2005 1 1.72148e+01 1.16173e+00 2816 2005 2 1.64279e+01 8.55987e-01 2257 2005 3 1.81450e+01 9.64081e-01 2693 2005 4 2.10186e+01 1.84480e+00 2251 2005 5 2.55229e+01 2.08185e+00 2613 2005 6 2.82688e+01 1.05153e+00 2428 2005 7 3.04845e+01 1.89890e+00 2027 2005 8 3.14125e+01 9.21353e-01 3897 2005 9 3.03443e+01 9.46983e-01 4575 2005 10 2.82462e+01 1.05392e+00 5142 2005 11 2.48424e+01 1.17436e+00 3097 2005 12 2.23124e+01 1.12545e+00 3235 2006 1 1.91907e+01 9.76488e-01 3190 2006 2 1.78969e+01 9.85152e-01 2037 2006 3 1.85989e+01 1.15775e+00 3006 2006 4 2.14770e+01 1.52575e+00 1939 2006 5 2.61929e+01 1.13926e+00 2752 2006 6 2.98554e+01 9.44330e-01 3431 2006 7 3.04660e+01 1.22895e+00 2549 2006 8 3.19503e+01 1.36485e+00 3916 2006 9 3.18298e+01 9.14310e-01 5296 2006 10 2.98904e+01 8.19870e-01 3611 2006 11 2.64428e+01 1.71182e+00 4784 2006 12 2.05611e+01 2.32538e+00 2795 2007 1 1.69697e+01 6.31159e-01 2813 2007 2 1.65213e+01 8.78148e-01 2219 2007 3 1.77060e+01 1.19975e+00 2189 2007 4 1.97904e+01 1.39701e+00 835 2007 5 2.66272e+01 2.04886e+00 1641 2007 6 2.94711e+01 7.01502e-01 2412 2007 7 3.01498e+01 1.23007e+00 3809 2007 8 3.20818e+01 9.19583e-01 4450 2007 9 3.20625e+01 8.92585e-01 4730 2007 10 2.98876e+01 7.48108e-01 6070 2007 11 2.66823e+01 1.65688e+00 4238 2007 12 2.07621e+01 1.09328e+00 2969 2008 1 1.67140e+01 1.41391e+00 1879 2008 2 1.52198e+01 1.00088e+00 2631 2008 3 1.69045e+01 1.06040e+00 1034 2008 4 2.12042e+01 1.74324e+00 1627 2008 5 2.52292e+01 1.59943e+00 1670 2008 6 2.80021e+01 1.15289e+00 996 2008 7 3.04367e+01 1.57406e+00 2498 2008 8 3.18151e+01 1.33089e+00 3936 2008 9 3.13980e+01 1.63900e+00 3594 2008 10 2.87817e+01 1.06178e+00 4166 2008 11 2.49281e+01 1.43895e+00 3048 2008 12 2.13147e+01 1.22341e+00 3800 2009 1 1.68169e+01 1.07900e+00 3573 2009 2 1.60034e+01 9.40589e-01 1407 2009 3 1.73989e+01 1.45067e+00 2048 2009 4 1.99083e+01 1.58400e+00 1840 2009 5 2.59619e+01 2.43444e+00 1864 2009 6 2.83020e+01 1.83627e+00 2223 2009 7 2.95493e+01 8.84213e-01 1492 2009 8 3.02649e+01 1.15277e+00 3503 2009 9 3.01682e+01 8.59829e-01 4664 2009 10 2.83194e+01 9.81993e-01 3146 2009 11 2.65354e+01 1.23116e+00 4130 2009 12 2.18493e+01 1.37444e+00 3543 2010 1 1.99791e+01 1.05056e+00 2999 2010 2 1.85495e+01 9.00017e-01 2235 2010 3 1.96486e+01 1.61097e+00 2354 2010 4 2.17257e+01 1.84749e+00 1741 2010 5 2.54645e+01 1.49043e+00 1943 2010 6 2.84611e+01 1.00560e+00 1729 2010 7 3.07864e+01 1.12319e+00 2063 2010 8 3.30980e+01 1.23587e+00 4153 2010 9 3.22558e+01 1.36034e+00 4976 2010 10 2.99681e+01 1.06621e+00 4681 2010 11 2.70194e+01 1.06155e+00 4698 2010 12 2.27965e+01 2.10499e+00 3845 2011 1 1.90593e+01 9.88238e-01 3090 2011 2 1.69374e+01 1.02517e+00 2198 2011 3 1.83620e+01 1.37685e+00 2835 2011 4 2.08327e+01 1.42654e+00 1099 2011 5 2.52947e+01 2.34304e+00 1789 2011 6 2.84650e+01 1.04819e+00 1239 2011 7 3.09118e+01 1.65278e+00 2750 2011 8 3.21372e+01 1.13490e+00 4838 2011 9 3.13425e+01 5.12995e-01 4974 2011 10 2.88361e+01 1.51026e+00 4882 2011 11 2.45965e+01 1.28242e+00 2808 2011 12 2.01996e+01 1.77148e+00 3956 2012 1 1.71085e+01 8.12343e-01 2960 2012 2 1.61908e+01 8.90028e-01 1986 2012 3 1.59358e+01 1.29657e+00 2141 2012 4 2.02088e+01 1.88596e+00 1847 2012 5 2.49822e+01 2.03974e+00 1168 2012 6 2.89304e+01 1.54089e+00 2419 2012 7 3.17549e+01 1.91262e+00 3372 2012 8 3.20352e+01 1.01045e+00 4594 2012 9 3.10063e+01 8.22387e-01 4584 2012 10 3.02951e+01 1.08654e+00 4381 2012 11 2.81442e+01 1.13656e+00 2932 2012 12 2.25048e+01 1.55949e+00 2911 2013 1 1.89892e+01 1.00036e+00 2707 2013 2 1.87313e+01 8.97626e-01 2876 2013 3 1.92313e+01 1.07258e+00 2659 2013 4 2.17180e+01 1.57145e+00 2187 2013 5 2.53454e+01 1.93666e+00 3556 2013 6 2.80321e+01 1.17309e+00 1576 2013 7 3.09180e+01 7.34872e-01 3137 2013 8 3.19777e+01 1.01691e+00 5522 2013 9 3.15834e+01 8.67935e-01 5939 2013 10 2.82880e+01 1.56303e+00 4373 2013 11 2.47663e+01 8.73442e-01 3803 2013 12 2.07910e+01 1.54714e+00 3546 2014 1 1.77308e+01 8.68792e-01 2744 2014 2 1.71050e+01 5.91504e-01 3043 2014 3 1.90184e+01 1.45956e+00 2744 2014 4 2.16738e+01 1.82854e+00 2064 2014 5 2.70025e+01 1.49697e+00 3032 2014 6 2.91962e+01 9.53490e-01 2945 2014 7 3.07586e+01 6.97043e-01 3911 2014 8 3.16278e+01 1.07108e+00 4498 2014 9 3.18988e+01 9.24323e-01 5752 2014 10 3.02591e+01 1.23208e+00 5208 2014 11 2.61790e+01 1.33582e+00 3796 2014 12 2.19839e+01 1.04626e+00 3788 2015 1 1.92138e+01 1.24110e+00 2839 2015 2 1.78817e+01 1.28311e+00 2084 2015 3 1.88639e+01 1.06902e+00 2251 2015 4 2.13804e+01 1.24349e+00 1774 2015 5 2.53444e+01 1.76484e+00 2375 2015 6 2.87188e+01 1.00768e+00 2772 2015 7 3.17778e+01 1.93944e+00 3052 2015 8 3.33207e+01 7.79235e-01 5733 2015 9 3.28233e+01 1.11083e+00 5030 2015 10 3.11164e+01 7.64548e-01 4729 2015 11 2.63207e+01 1.64825e+00 4320 2015 12 2.13774e+01 1.78510e+00 3334 2016 1 1.81964e+01 7.30674e-01 3939 2016 2 1.70056e+01 7.13891e-01 3131 2016 3 1.88107e+01 1.23975e+00 2136 2016 4 2.21800e+01 1.88388e+00 3079 2016 5 2.65808e+01 1.40017e+00 2892 2016 6 2.89170e+01 1.28931e+00 2975 2016 7 3.12926e+01 1.02931e+00 3608 2016 8 3.32341e+01 8.77952e-01 5243 2016 9 3.21911e+01 1.16191e+00 4905 2016 10 2.91719e+01 1.15995e+00 4730 2016 11 2.65713e+01 1.15857e+00 3052 2016 12 2.12166e+01 1.71863e+00 2381 2017 1 1.80474e+01 9.83763e-01 2353 2017 2 1.61738e+01 1.01266e+00 2186 2017 3 1.81598e+01 1.77251e+00 2008 2017 4 2.14268e+01 1.66003e+00 1276 2017 5 2.63162e+01 1.70468e+00 2558 2017 6 2.78247e+01 1.66793e+00 1115 2017 7 3.22693e+01 1.47776e+00 4071 2017 8 3.42288e+01 8.03872e-01 4747 2017 9 3.33074e+01 8.72072e-01 5375 2017 10 3.00987e+01 1.61670e+00 4687 2017 11 2.70043e+01 1.24535e+00 3955 2017 12 2.23627e+01 1.50693e+00 3856 2018 1 1.92454e+01 1.15101e+00 3941 2018 2 1.83636e+01 8.43426e-01 2031 2018 3 2.04242e+01 1.41739e+00 2754 2018 4 2.21605e+01 1.81354e+00 2008 2018 5 2.67369e+01 1.83575e+00 2932 2018 6 2.96431e+01 9.66546e-01 2230 2018 7 3.12442e+01 7.70148e-01 3869 2018 8 3.12346e+01 7.86415e-01 4569 2018 9 3.24088e+01 7.08006e-01 5526 2018 10 3.12087e+01 1.25378e+00 5065 2018 11 2.65160e+01 1.25574e+00 1611 2018 12 2.34715e+01 1.17593e+00 3717 2019 1 1.88661e+01 1.86182e+00 1608 2019 2 1.86651e+01 9.11047e-01 2582 2019 3 1.88984e+01 7.99591e-01 3670 2019 4 2.11180e+01 1.08365e+00 2897 2019 5 2.69218e+01 2.51155e+00 3767 2019 6 3.16092e+01 1.05832e+00 4649 2019 7 3.12268e+01 7.54707e-01 3764 2019 8 3.25392e+01 7.03257e-01 6093 2019 9 3.20862e+01 6.46302e-01 6770 2019 10 3.20316e+01 9.42314e-01 5261 2019 11 2.75373e+01 1.57070e+00 4522 2019 12 2.25692e+01 1.15868e+00 3390 2020 1 1.93579e+01 1.03210e+00 4310 2020 2 1.77477e+01 6.76855e-01 3975 2020 3 1.91071e+01 9.51903e-01 3882 2020 4 2.21571e+01 1.38102e+00 3041 2020 5 2.71404e+01 1.83114e+00 4899 2020 6 2.91216e+01 8.26359e-01 6888 2020 7 3.31109e+01 1.61263e+00 5858 2020 8 3.34366e+01 9.51699e-01 4837 2020 9 3.30803e+01 6.89684e-01 6293 2020 10 3.11151e+01 1.29135e+00 7460 2020 11 2.77621e+01 1.35211e+00 3447 2020 12 2.27759e+01 1.40327e+00 4202 2021 1 1.93827e+01 9.22150e-01 5646 2021 2 1.84592e+01 7.07162e-01 4324 2021 3 1.86804e+01 7.14468e-01 4262 2021 4 2.21801e+01 2.18917e+00 2972 2021 5 2.81783e+01 1.86947e+00 5166 2021 6 2.92188e+01 1.07372e+00 6024 2021 7 3.29062e+01 1.17021e+00 6341 2021 8 3.37629e+01 7.15007e-01 6808 2021 9 3.22698e+01 9.31346e-01 6516 2021 10 2.97853e+01 1.14601e+00 6668 2021 11 2.62437e+01 1.39104e+00 5079 2021 12 2.26060e+01 1.14617e+00 2641 2022 1 1.91212e+01 1.22079e+00 4073 2022 2 1.78422e+01 6.98883e-01 4745 2022 3 -7.60847e+01 2.94394e+02 3465 2022 4 2.16956e+01 1.21690e+00 1749 2022 5 2.51014e+01 1.05340e+00 4030 2022 6 2.92973e+01 8.43777e-01 5165 2022 7 3.13034e+01 1.45184e+00 3627 2022 8 3.39415e+01 8.35723e-01 5620 2022 9 3.29026e+01 9.86506e-01 5766 2022 10 3.06948e+01 6.23305e-01 4236 2022 11 2.73436e+01 1.18683e+00 2643 2022 12 2.34249e+01 1.20063e+00 3958 2023 1 1.97816e+01 9.60585e-01 2225 2023 2 1.84373e+01 8.85894e-01 2331 2023 3 1.96965e+01 8.73651e-01 4681 2023 4 2.24422e+01 1.96487e+00 4451 2023 5 2.59894e+01 1.63071e+00 4457 2023 6 2.92922e+01 9.35043e-01 5282 2023 7 3.19861e+01 1.28743e+00 5987 2023 8 3.40597e+01 7.53674e-01 6002 2023 9 3.31344e+01 8.10474e-01 6225 2023 10 3.11435e+01 1.02330e+00 5333 2023 11 2.74210e+01 1.37912e+00 3875 2023 12 2.35870e+01 1.68118e+00 4275 2024 1 2.04761e+01 7.47678e-01 4206 2024 2 1.97712e+01 4.94681e-01 4633 2024 3 1.97732e+01 6.67001e-01 3831 2024 4 2.21878e+01 8.02055e-01 828