YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.72575e+01 1.03731e-01 65 2000 3 2.01112e+01 1.51790e+00 637 2000 4 2.20972e+01 8.40908e-01 539 2000 5 2.55772e+01 1.80332e+00 928 2000 6 2.77153e+01 5.96864e-01 362 2000 7 2.91181e+01 8.33577e-01 467 2000 8 2.86544e+01 1.40075e+00 185 2000 9 2.75286e+01 8.43334e-01 395 2000 10 2.30331e+01 1.47173e+00 935 2000 11 2.16640e+01 2.55953e+00 450 2000 12 1.54974e+01 1.26581e+00 221 2001 1 1.26472e+01 7.06049e-02 64 2001 2 1.67148e+01 2.15240e+00 430 2001 3 1.73593e+01 1.16622e+00 505 2001 4 2.06922e+01 1.99429e+00 703 2001 5 2.49210e+01 1.18392e+00 588 2001 6 2.75359e+01 8.11568e-01 199 2001 7 2.93887e+01 5.76084e-01 153 2001 8 2.94618e+01 4.64515e-01 357 2001 9 2.67500e+01 1.67944e+00 280 2001 10 2.26318e+01 1.77543e+00 541 2001 11 1.99496e+01 6.11439e-01 672 2001 12 1.93898e+01 1.97519e+00 581 2002 1 1.31398e+01 3.52740e-01 92 2002 2 1.57662e+01 1.11988e+00 384 2002 3 2.02957e+01 2.82361e-01 128 2002 4 2.39342e+01 2.28684e+00 552 2002 5 2.61788e+01 1.40999e+00 688 2002 6 2.80887e+01 1.23555e+00 489 2002 7 2.90423e+01 1.44935e+00 1752 2002 8 2.92778e+01 8.32946e-01 1893 2002 9 2.85370e+01 1.21112e+00 1805 2002 10 2.72218e+01 1.60828e+00 2708 2002 11 2.07927e+01 2.71856e+00 2177 2002 12 1.51468e+01 9.52295e-01 1195 2003 1 1.24141e+01 1.37255e+00 1732 2003 2 1.44542e+01 1.67126e+00 719 2003 3 2.06502e+01 1.74100e+00 1348 2003 4 2.16123e+01 1.76544e+00 2658 2003 5 2.66212e+01 1.59296e+00 2545 2003 6 2.84957e+01 1.40590e+00 1614 2003 7 2.96995e+01 1.32008e+00 1171 2003 8 2.90107e+01 1.34547e+00 2066 2003 9 2.83507e+01 1.24233e+00 1938 2003 10 2.43846e+01 1.01901e+00 2626 2003 11 2.17692e+01 1.82488e+00 2863 2003 12 1.53808e+01 1.85685e+00 1283 2004 1 1.34812e+01 1.03117e+00 1623 2004 2 1.38535e+01 9.44824e-01 724 2004 3 1.83496e+01 1.69847e+00 2680 2004 4 2.00548e+01 1.73584e+00 2618 2004 5 2.57868e+01 1.98353e+00 3672 2004 6 2.94583e+01 1.24574e+00 2616 2004 7 2.99127e+01 1.58675e+00 2065 2004 8 2.97391e+01 1.29110e+00 2009 2004 9 2.71419e+01 1.78007e+00 1811 2004 10 2.48838e+01 1.34511e+00 2480 2004 11 2.24664e+01 2.24085e+00 2182 2004 12 1.60850e+01 2.59532e+00 2006 2005 1 1.48654e+01 1.58352e+00 1083 2005 2 1.43109e+01 9.72808e-01 1064 2005 3 1.64482e+01 1.70729e+00 1718 2005 4 2.03917e+01 9.17405e-01 2725 2005 5 2.45584e+01 2.30746e+00 2974 2005 6 2.83421e+01 1.33315e+00 2343 2005 7 3.03603e+01 1.71363e+00 2254 2005 8 2.97353e+01 1.86449e+00 2038 2005 9 2.80151e+01 1.29631e+00 2517 2005 10 2.52924e+01 2.53678e+00 3052 2005 11 2.03982e+01 1.47402e+00 1944 2005 12 1.50169e+01 1.96126e+00 1654 2006 1 1.49929e+01 1.02361e+00 1470 2006 2 1.46660e+01 1.29800e+00 1617 2006 3 1.84082e+01 1.23861e+00 2700 2006 4 2.23456e+01 2.18939e+00 2876 2006 5 2.49200e+01 1.57938e+00 3356 2006 6 2.82885e+01 1.18027e+00 3039 2006 7 3.00477e+01 1.31983e+00 2605 2006 8 3.03892e+01 9.71215e-01 2607 2006 9 2.85335e+01 1.33485e+00 2176 2006 10 2.49260e+01 1.97779e+00 3046 2006 11 1.86834e+01 1.86166e+00 2066 2006 12 1.59591e+01 1.37626e+00 618 2007 1 1.50590e+01 1.03811e+00 901 2007 2 1.38906e+01 7.77732e-01 1154 2007 3 1.86326e+01 1.64644e+00 2761 2007 4 2.04843e+01 1.49276e+00 2123 2007 5 2.41837e+01 9.44624e-01 3607 2007 6 2.74816e+01 1.82261e+00 2539 2007 7 2.99708e+01 1.47687e+00 1837 2007 8 3.04056e+01 1.35086e+00 2400 2007 9 2.88111e+01 1.42337e+00 2349 2007 10 2.63157e+01 1.10411e+00 1945 2007 11 1.97448e+01 1.68357e+00 3127 2007 12 1.78442e+01 1.26591e+00 1678 2008 1 1.41042e+01 1.57453e+00 977 2008 2 1.65307e+01 9.84889e-01 1591 2008 3 1.78360e+01 1.67780e+00 2596 2008 4 2.18655e+01 1.38385e+00 2985 2008 5 2.48315e+01 1.90584e+00 2794 2008 6 2.87730e+01 1.27874e+00 2244 2008 7 2.99569e+01 1.07435e+00 1941 2008 8 2.80458e+01 1.85653e+00 1603 2008 9 2.77726e+01 1.42853e+00 2563 2008 10 2.39464e+01 1.90524e+00 3293 2008 11 1.78246e+01 1.88882e+00 2185 2008 12 1.55323e+01 9.98841e-01 1213 2009 1 1.47073e+01 1.68678e+00 1932 2009 2 1.41921e+01 1.13093e+00 1495 2009 3 1.77709e+01 2.19489e+00 1901 2009 4 2.17564e+01 1.49713e+00 2245 2009 5 2.58463e+01 1.45177e+00 2610 2009 6 2.81079e+01 1.50788e+00 2608 2009 7 2.89516e+01 1.28059e+00 2217 2009 8 3.00203e+01 1.41604e+00 2136 2009 9 2.87358e+01 9.46053e-01 2338 2009 10 2.58552e+01 2.49847e+00 2852 2009 11 1.99422e+01 1.25038e+00 1821 2009 12 1.47055e+01 2.12351e+00 536 2010 1 1.14003e+01 2.21443e+00 1375 2010 2 1.25202e+01 8.65597e-01 1517 2010 3 1.50292e+01 1.93418e+00 1813 2010 4 2.12309e+01 1.36186e+00 2153 2010 5 2.67473e+01 2.02105e+00 3147 2010 6 3.01125e+01 1.30765e+00 2727 2010 7 2.97268e+01 1.46861e+00 2427 2010 8 3.02806e+01 1.18135e+00 1238 2010 9 2.92132e+01 1.39895e+00 2613 2010 10 2.47971e+01 9.08564e-01 4246 2010 11 2.04415e+01 1.22693e+00 2896 2010 12 1.44237e+01 3.02830e+00 2143 2011 1 1.17178e+01 7.37422e-01 1371 2011 2 1.35036e+01 1.85508e+00 704 2011 3 1.88757e+01 1.22703e+00 2123 2011 4 2.34835e+01 1.47186e+00 3462 2011 5 2.58668e+01 1.26433e+00 4212 2011 6 2.92576e+01 1.41195e+00 2818 2011 7 2.96047e+01 1.25401e+00 2047 2011 8 3.06928e+01 1.04765e+00 2989 2011 9 2.84577e+01 9.67980e-01 2690 2011 10 2.40903e+01 1.83069e+00 2741 2011 11 1.92232e+01 9.03064e-01 2272 2011 12 1.66003e+01 1.01299e+00 1269 2012 1 1.52362e+01 1.17584e+00 2199 2012 2 1.65653e+01 1.07915e+00 633 2012 3 2.11591e+01 1.99603e+00 2692 2012 4 2.35107e+01 9.01122e-01 3486 2012 5 2.67485e+01 1.09843e+00 3334 2012 6 2.73188e+01 1.30334e+00 2004 2012 7 2.97675e+01 1.79850e+00 1942 2012 8 2.90190e+01 1.21108e+00 1773 2012 9 2.84488e+01 1.31728e+00 1982 2012 10 2.50792e+01 2.26003e+00 2702 2012 11 1.90189e+01 1.12348e+00 2407 2012 12 1.73612e+01 1.58077e+00 1775 2013 1 1.56569e+01 1.23101e+00 1067 2013 2 1.62674e+01 1.05077e+00 1665 2013 3 1.61539e+01 1.20610e+00 2465 2013 4 2.08708e+01 2.04172e+00 2363 2013 5 2.42901e+01 2.15084e+00 2676 2013 6 2.80671e+01 1.67756e+00 2779 2013 7 2.84468e+01 1.99721e+00 1310 2013 8 3.02895e+01 1.44483e+00 2609 2013 9 2.95475e+01 1.60133e+00 2816 2013 10 2.54967e+01 1.61078e+00 2897 2013 11 2.01728e+01 2.15900e+00 1725 2013 12 1.66471e+01 1.59022e+00 1116 2014 1 1.29782e+01 8.40900e-01 948 2014 2 1.49175e+01 2.27955e+00 1149 2014 3 1.70917e+01 1.35406e+00 1756 2014 4 2.12149e+01 1.73860e+00 2071 2014 5 2.53710e+01 1.34279e+00 2376 2014 6 2.86770e+01 1.60418e+00 2242 2014 7 3.03254e+01 1.25381e+00 2150 2014 8 2.98866e+01 1.34336e+00 2801 2014 9 2.88528e+01 1.33011e+00 1277 2014 10 2.56204e+01 1.61360e+00 3434 2014 11 1.83519e+01 2.41065e+00 2217 2014 12 1.60872e+01 1.02866e+00 1516 2015 1 1.49772e+01 9.42881e-01 1966 2015 2 1.35835e+01 1.19513e+00 1628 2015 3 1.96152e+01 1.85128e+00 1352 2015 4 2.30355e+01 1.80188e+00 1187 2015 5 2.66983e+01 1.64881e+00 3640 2015 6 2.99431e+01 1.17675e+00 2183 2015 7 2.96640e+01 1.39191e+00 1774 2015 8 3.04008e+01 1.53107e+00 1844 2015 9 2.82537e+01 1.90901e+00 950 2015 10 2.42568e+01 1.22307e+00 2536 2015 11 2.26300e+01 2.38248e+00 2273 2015 12 1.90139e+01 1.04251e+00 1145 2016 1 1.54379e+01 2.05798e+00 1438 2016 2 1.44033e+01 1.34552e+00 1410 2016 3 1.85031e+01 1.90098e+00 1538 2016 4 2.20600e+01 1.77030e+00 2198 2016 5 2.59504e+01 1.53101e+00 3241 2016 6 2.92662e+01 1.26203e+00 2729 2016 7 3.13333e+01 1.05381e+00 2526 2016 8 3.03520e+01 9.88072e-01 2289 2016 9 2.91994e+01 1.35165e+00 2520 2016 10 2.57149e+01 1.80346e+00 2951 2016 11 2.09655e+01 2.37676e+00 2949 2016 12 1.81754e+01 1.40724e+00 1734 2017 1 1.64133e+01 1.11356e+00 1452 2017 2 1.78908e+01 1.54620e+00 2026 2017 3 1.89531e+01 1.80619e+00 2441 2017 4 2.30137e+01 1.43152e+00 3010 2017 5 2.52285e+01 1.38908e+00 2330 2017 6 2.84376e+01 1.49496e+00 1731 2017 7 3.03889e+01 1.15842e+00 1138 2017 8 3.03098e+01 1.33566e+00 1986 2017 9 2.83070e+01 1.36186e+00 2583 2017 10 2.54968e+01 2.00038e+00 3100 2017 11 2.05413e+01 1.31645e+00 2950 2017 12 1.73662e+01 2.03066e+00 1414 2018 1 1.15887e+01 1.01379e+00 1312 2018 2 1.84860e+01 2.94427e+00 1169 2018 3 1.84048e+01 1.61773e+00 2802 2018 4 2.12723e+01 1.24454e+00 2381 2018 5 2.49174e+01 1.48512e+00 2276 2018 6 2.92166e+01 1.63109e+00 2077 2018 7 2.99913e+01 1.40178e+00 1884 2018 8 3.00382e+01 1.27309e+00 1847 2018 9 3.02621e+01 1.20034e+00 2844 2018 10 2.71514e+01 2.11730e+00 2967 2018 11 2.02363e+01 2.04121e+00 1221 2018 12 1.66381e+01 1.95501e+00 1050 2019 1 1.57960e+01 1.62103e+00 1730 2019 2 1.78351e+01 2.36196e+00 765 2019 3 1.87944e+01 1.06009e+00 2064 2019 4 2.22240e+01 1.59338e+00 2085 2019 5 2.75507e+01 1.83488e+00 3407 2019 6 2.91100e+01 1.43833e+00 1611 2019 7 2.97242e+01 1.64426e+00 1506 2019 8 3.00136e+01 1.23900e+00 2032 2019 9 2.92798e+01 9.08256e-01 3407 2019 10 2.69639e+01 1.81932e+00 2210 2019 11 1.95526e+01 2.21499e+00 2106 2019 12 1.70412e+01 1.18722e+00 1882 2020 1 1.60625e+01 1.29666e+00 2154 2020 2 1.58042e+01 1.17481e+00 1747 2020 3 2.08264e+01 3.33288e+00 2380 2020 4 2.38560e+01 9.95952e-01 1930 2020 5 2.47436e+01 1.34283e+00 2953 2020 6 2.94102e+01 1.08572e+00 2284 2020 7 2.98595e+01 1.22096e+00 1997 2020 8 3.11728e+01 1.01246e+00 1573 2020 9 2.83012e+01 1.96686e+00 1644 2020 10 2.56119e+01 9.40327e-01 2411 2020 11 2.21973e+01 1.65642e+00 2784 2020 12 1.57534e+01 1.65801e+00 2791 2021 1 1.42396e+01 1.21574e+00 1785 2021 2 1.64121e+01 1.87798e+00 1781 2021 3 1.87028e+01 1.40639e+00 2303 2021 4 2.17485e+01 1.32652e+00 2527 2021 5 2.56620e+01 1.30454e+00 2592 2021 6 2.79474e+01 1.11842e+00 1254 2021 7 2.96268e+01 1.13541e+00 1567 2021 8 3.03650e+01 1.28011e+00 1770 2021 9 2.87504e+01 1.14226e+00 2427 2021 10 2.64077e+01 1.51620e+00 1992 2021 11 1.96016e+01 1.29826e+00 2629 2021 12 1.80659e+01 1.07004e+00 2344 2022 1 1.63819e+01 2.26106e+00 2735 2022 2 1.57926e+01 2.20335e+00 2211 2022 3 1.91495e+01 1.19179e+00 2710 2022 4 2.28422e+01 1.00456e+00 1976 2022 5 2.66685e+01 1.31619e+00 3024 2022 6 2.96904e+01 1.12417e+00 2678 2022 7 3.08600e+01 9.76052e-01 1893 2022 8 3.07926e+01 1.33582e+00 2079 2022 9 2.82851e+01 1.71905e+00 1967 2022 10 2.36827e+01 1.44612e+00 2985 2022 11 2.14550e+01 2.22734e+00 1825 2022 12 1.77273e+01 2.38046e+00 3069 2023 1 1.48279e+01 7.26620e-01 2350 2023 2 1.69280e+01 1.43259e+00 2199 2023 3 2.03837e+01 1.57203e+00 2928 2023 4 2.28164e+01 8.86322e-01 2054 2023 5 2.58942e+01 1.61853e+00 2497 2023 6 2.73156e+01 1.43077e+00 2256 2023 7 3.03611e+01 1.21929e+00 3035 2023 8 3.12152e+01 9.98683e-01 3075 2023 9 2.95162e+01 1.20923e+00 2323 2023 10 2.41520e+01 1.27987e+00 2914 2023 11 2.07884e+01 1.32505e+00 2022 2023 12 1.49712e+01 1.48240e+00 1489 2024 1 1.39602e+01 1.05231e+00 1253 2024 2 1.54143e+01 8.55635e-01 1855 2024 3 1.98202e+01 1.28519e+00 1868 2024 4 2.17344e+01 1.23159e-01 192