YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.01989e+01 1.88620e-01 192 2000 3 2.26124e+01 6.20859e-01 694 2000 4 2.38166e+01 1.19672e+00 766 2000 5 2.64887e+01 1.04572e+00 705 2000 6 2.82258e+01 9.64961e-01 335 2000 7 3.01009e+01 7.57550e-01 446 2000 8 2.97859e+01 5.41652e-01 254 2000 9 2.96140e+01 9.28908e-01 495 2000 10 2.67333e+01 1.19170e+00 922 2000 11 2.45649e+01 1.03642e+00 659 2000 12 2.12623e+01 1.53035e+00 521 2001 1 1.85633e+01 9.26462e-01 499 2001 2 1.92810e+01 1.10371e+00 637 2001 3 2.17603e+01 8.42316e-01 655 2001 4 2.36325e+01 1.29489e+00 680 2001 5 2.48838e+01 1.27702e+00 448 2001 6 2.86454e+01 4.42199e-01 256 2001 7 2.81853e+01 1.50056e+00 304 2001 8 2.89508e+01 1.88369e+00 392 2001 9 2.87894e+01 7.65095e-01 502 2001 10 2.73864e+01 8.30450e-01 625 2001 11 2.38304e+01 4.38237e-01 768 2001 12 2.36271e+01 7.02443e-01 769 2002 1 2.15036e+01 1.24479e+00 673 2002 2 2.15994e+01 7.91077e-01 469 2002 3 2.13438e+01 1.21100e+00 385 2002 4 2.51663e+01 1.61822e+00 718 2002 5 2.70355e+01 7.02472e-01 727 2002 6 2.70984e+01 1.90481e+00 408 2002 7 2.91108e+01 1.12962e+00 1872 2002 8 2.99884e+01 7.87301e-01 1837 2002 9 2.93840e+01 7.60332e-01 1441 2002 10 2.88137e+01 7.24451e-01 3627 2002 11 2.61957e+01 2.09004e+00 2670 2002 12 2.17584e+01 1.04255e+00 2193 2003 1 1.86324e+01 1.23160e+00 2178 2003 2 1.87050e+01 1.02052e+00 2519 2003 3 2.34299e+01 8.92823e-01 1920 2003 4 2.23424e+01 1.09560e+00 2596 2003 5 2.70687e+01 1.33676e+00 3471 2003 6 2.96371e+01 6.17701e-01 984 2003 7 2.92841e+01 1.13150e+00 1887 2003 8 2.98279e+01 1.07929e+00 1464 2003 9 2.94463e+01 8.05445e-01 2011 2003 10 2.79536e+01 1.21105e+00 2867 2003 11 2.42944e+01 8.91531e-01 3005 2003 12 2.05995e+01 1.37509e+00 2077 2004 1 1.94623e+01 6.62815e-01 3074 2004 2 1.95525e+01 6.31241e-01 1938 2004 3 2.09696e+01 8.81960e-01 3305 2004 4 2.26324e+01 8.51999e-01 3048 2004 5 2.56052e+01 1.55073e+00 3326 2004 6 2.89966e+01 1.08180e+00 2983 2004 7 2.96333e+01 1.06724e+00 2323 2004 8 3.00517e+01 1.25294e+00 2366 2004 9 2.91345e+01 1.36580e+00 2034 2004 10 2.75293e+01 1.15766e+00 2904 2004 11 2.52763e+01 1.07084e+00 3261 2004 12 2.23969e+01 1.63368e+00 2452 2005 1 1.98531e+01 5.86694e-01 3082 2005 2 1.93659e+01 8.47141e-01 2865 2005 3 2.08130e+01 1.60004e+00 2122 2005 4 2.31821e+01 6.77489e-01 3253 2005 5 2.52751e+01 1.51017e+00 2951 2005 6 2.82036e+01 1.27402e+00 1413 2005 7 2.92529e+01 1.23252e+00 2707 2005 8 3.03038e+01 1.41051e+00 1643 2005 9 2.90888e+01 9.21844e-01 2140 2005 10 2.73434e+01 1.46879e+00 1961 2005 11 2.46068e+01 6.82330e-01 2753 2005 12 2.22524e+01 1.15956e+00 2591 2006 1 2.06076e+01 7.66803e-01 2715 2006 2 1.99154e+01 9.93360e-01 2929 2006 3 2.13202e+01 1.07526e+00 3533 2006 4 2.42148e+01 1.70452e+00 3493 2006 5 2.67676e+01 1.01131e+00 2716 2006 6 2.86016e+01 8.53436e-01 2485 2006 7 2.86747e+01 1.04976e+00 2023 2006 8 2.97197e+01 9.71528e-01 2313 2006 9 3.00794e+01 9.02588e-01 3056 2006 10 2.84449e+01 1.22266e+00 3062 2006 11 2.38059e+01 1.44957e+00 2186 2006 12 2.19461e+01 6.35911e-01 1881 2007 1 2.22199e+01 5.94985e-01 2870 2007 2 2.03262e+01 7.56806e-01 1847 2007 3 2.14480e+01 7.47088e-01 3232 2007 4 2.32319e+01 1.06087e+00 3271 2007 5 2.56112e+01 9.11729e-01 3584 2007 6 2.79304e+01 1.53526e+00 2318 2007 7 3.06365e+01 9.87709e-01 2634 2007 8 3.03843e+01 8.77636e-01 2424 2007 9 3.03737e+01 1.06527e+00 1607 2007 10 2.84319e+01 7.92398e-01 2199 2007 11 2.50601e+01 1.11466e+00 3720 2007 12 2.34598e+01 6.57673e-01 3453 2008 1 2.07810e+01 7.37398e-01 2413 2008 2 2.15260e+01 9.86467e-01 2346 2008 3 2.21345e+01 7.36277e-01 2759 2008 4 2.44090e+01 5.82605e-01 3556 2008 5 2.65291e+01 1.26133e+00 4167 2008 6 2.87604e+01 1.08459e+00 2132 2008 7 2.99283e+01 1.53119e+00 1691 2008 8 3.03685e+01 1.00119e+00 2691 2008 9 2.93542e+01 9.50306e-01 2187 2008 10 2.77681e+01 1.30486e+00 2184 2008 11 2.32444e+01 1.03964e+00 3670 2008 12 2.08830e+01 6.25593e-01 3479 2009 1 2.02874e+01 1.03330e+00 3001 2009 2 1.85878e+01 7.27408e-01 2787 2009 3 1.96663e+01 1.07949e+00 3086 2009 4 2.40839e+01 7.20883e-01 3458 2009 5 2.63163e+01 1.10551e+00 3210 2009 6 2.90565e+01 1.15164e+00 2200 2009 7 2.99956e+01 1.04774e+00 2101 2009 8 3.01225e+01 8.88636e-01 2657 2009 9 3.05680e+01 1.15792e+00 1856 2009 10 2.94893e+01 1.28624e+00 3026 2009 11 2.55813e+01 1.27173e+00 1882 2009 12 2.31350e+01 1.30092e+00 2114 2010 1 1.89225e+01 1.29480e+00 1946 2010 2 1.80295e+01 9.34774e-01 1568 2010 3 1.78625e+01 1.01810e+00 2166 2010 4 2.15974e+01 1.43583e+00 2463 2010 5 2.65779e+01 1.50171e+00 3771 2010 6 2.96900e+01 1.14807e+00 2835 2010 7 2.89775e+01 1.39661e+00 1906 2010 8 2.99743e+01 1.41845e+00 1683 2010 9 2.98745e+01 9.46211e-01 2473 2010 10 2.72327e+01 1.06666e+00 3432 2010 11 2.45678e+01 1.20719e+00 3059 2010 12 2.00620e+01 2.02203e+00 3075 2011 1 1.77767e+01 7.27528e-01 2652 2011 2 1.85563e+01 1.12578e+00 2799 2011 3 2.10316e+01 1.45245e+00 3873 2011 4 2.48819e+01 1.15586e+00 3670 2011 5 2.71690e+01 8.51616e-01 3480 2011 6 2.85841e+01 1.20015e+00 2273 2011 7 2.98312e+01 1.24099e+00 2157 2011 8 3.04491e+01 1.03822e+00 1836 2011 9 3.01928e+01 1.06794e+00 2003 2011 10 2.82932e+01 1.53598e+00 1328 2011 11 2.41376e+01 6.05193e-01 3515 2011 12 2.22970e+01 6.09790e-01 3613 2012 1 2.07489e+01 9.53584e-01 2877 2012 2 2.15523e+01 9.74682e-01 2216 2012 3 2.32508e+01 7.94345e-01 4032 2012 4 2.51849e+01 9.43504e-01 2546 2012 5 2.69645e+01 1.55298e+00 3112 2012 6 2.87086e+01 9.57336e-01 1881 2012 7 2.90683e+01 1.25754e+00 2124 2012 8 2.98683e+01 1.46494e+00 1826 2012 9 2.88287e+01 8.86540e-01 1975 2012 10 2.72189e+01 1.27645e+00 3077 2012 11 2.32620e+01 1.25706e+00 3149 2012 12 2.17871e+01 6.92478e-01 2796 2013 1 2.14393e+01 6.73494e-01 2710 2013 2 2.12269e+01 6.72569e-01 2493 2013 3 2.08529e+01 6.59508e-01 2724 2013 4 2.35499e+01 1.85203e+00 3190 2013 5 2.58086e+01 1.01894e+00 3210 2013 6 2.82339e+01 1.15550e+00 2217 2013 7 2.89408e+01 1.23487e+00 2079 2013 8 2.99357e+01 8.62235e-01 1740 2013 9 2.92076e+01 8.25894e-01 1725 2013 10 2.85040e+01 8.09121e-01 2475 2013 11 2.53003e+01 1.27104e+00 2140 2013 12 2.34718e+01 6.22758e-01 2369 2014 1 2.11360e+01 1.24510e+00 1948 2014 2 2.17106e+01 9.03618e-01 2545 2014 3 2.31422e+01 8.99988e-01 2968 2014 4 2.43292e+01 1.09208e+00 2842 2014 5 2.63318e+01 6.54832e-01 2759 2014 6 2.90177e+01 1.36050e+00 2383 2014 7 3.02643e+01 9.98197e-01 2380 2014 8 3.13288e+01 1.12975e+00 2451 2014 9 2.99308e+01 1.25519e+00 1592 2014 10 2.84556e+01 1.27864e+00 2681 2014 11 2.48106e+01 1.48851e+00 2590 2014 12 2.15410e+01 5.66722e-01 2480 2015 1 2.13588e+01 8.18171e-01 2209 2015 2 1.99747e+01 5.82343e-01 2499 2015 3 2.28648e+01 1.66834e+00 3507 2015 4 2.54777e+01 1.81325e+00 2725 2015 5 2.75467e+01 1.09262e+00 3111 2015 6 2.93899e+01 1.24832e+00 2132 2015 7 3.00878e+01 9.71298e-01 2046 2015 8 3.09893e+01 1.11386e+00 2078 2015 9 3.04849e+01 1.00308e+00 1382 2015 10 2.82059e+01 1.16946e+00 2498 2015 11 2.67818e+01 1.04060e+00 3112 2015 12 2.42028e+01 8.69128e-01 2500 2016 1 2.23001e+01 1.96359e+00 1014 2016 2 1.97458e+01 5.71099e-01 2314 2016 3 2.17306e+01 1.66925e+00 1507 2016 4 2.39425e+01 9.53013e-01 3114 2016 5 2.67879e+01 1.55537e+00 3088 2016 6 2.89505e+01 1.38971e+00 2600 2016 7 3.02231e+01 1.11691e+00 2388 2016 8 2.98958e+01 9.34600e-01 1971 2016 9 3.01758e+01 1.17766e+00 2423 2016 10 2.74302e+01 1.85961e+00 2724 2016 11 2.42250e+01 1.11854e+00 3547 2016 12 2.33624e+01 6.19561e-01 3147 2017 1 2.18612e+01 7.70043e-01 3210 2017 2 2.17318e+01 6.79951e-01 3093 2017 3 2.24434e+01 6.61036e-01 3986 2017 4 2.42174e+01 6.50516e-01 2809 2017 5 2.67954e+01 1.33937e+00 3150 2017 6 2.90475e+01 1.56140e+00 1611 2017 7 3.02331e+01 1.03512e+00 1856 2017 8 3.08299e+01 1.22852e+00 2345 2017 9 2.97895e+01 1.01702e+00 2331 2017 10 2.83535e+01 8.30723e-01 1889 2017 11 2.50285e+01 7.09699e-01 3819 2017 12 2.35696e+01 9.03126e-01 3281 2018 1 2.01573e+01 1.35924e+00 1899 2018 2 2.18016e+01 1.44294e+00 3746 2018 3 2.22112e+01 8.44572e-01 3525 2018 4 2.43128e+01 1.14260e+00 3332 2018 5 2.51700e+01 8.85021e-01 1113 2018 6 2.80471e+01 1.29308e+00 2056 2018 7 3.01035e+01 9.81869e-01 2157 2018 8 2.99872e+01 1.01251e+00 1968 2018 9 2.99156e+01 1.11744e+00 2576 2018 10 2.75912e+01 1.02051e+00 3266 2018 11 2.59055e+01 7.60547e-01 2513 2018 12 2.30832e+01 1.24811e+00 2155 2019 1 2.15586e+01 1.14721e+00 2482 2019 2 2.16475e+01 1.45724e+00 3213 2019 3 2.39196e+01 7.87048e-01 3528 2019 4 2.49573e+01 9.24886e-01 3427 2019 5 2.76875e+01 7.72143e-01 3148 2019 6 3.04226e+01 1.34709e+00 2752 2019 7 3.04414e+01 8.18692e-01 1946 2019 8 3.07971e+01 7.32427e-01 1921 2019 9 2.96699e+01 1.15319e+00 2654 2019 10 2.80984e+01 1.07257e+00 2599 2019 11 2.64257e+01 1.61203e+00 2642 2019 12 2.38042e+01 7.33719e-01 2188 2020 1 2.20849e+01 9.85067e-01 3184 2020 2 2.14413e+01 8.32031e-01 3051 2020 3 2.31027e+01 1.59147e+00 4092 2020 4 2.62223e+01 1.03521e+00 3208 2020 5 2.70061e+01 1.06308e+00 2207 2020 6 2.97088e+01 1.15439e+00 1926 2020 7 3.03834e+01 1.39791e+00 1986 2020 8 3.04755e+01 1.00640e+00 2188 2020 9 3.00954e+01 9.27018e-01 2358 2020 10 2.83199e+01 1.27909e+00 2146 2020 11 2.58542e+01 1.08583e+00 2825 2020 12 2.27288e+01 1.24363e+00 2837 2021 1 2.06407e+01 8.74626e-01 2342 2021 2 2.11894e+01 1.12042e+00 2856 2021 3 2.25694e+01 1.09514e+00 3757 2021 4 2.42511e+01 1.07128e+00 3071 2021 5 2.68998e+01 8.56677e-01 3085 2021 6 2.76620e+01 8.24222e-01 1186 2021 7 2.95472e+01 9.53632e-01 2736 2021 8 3.03862e+01 1.19496e+00 1672 2021 9 3.02586e+01 8.49370e-01 2523 2021 10 2.91935e+01 9.84139e-01 2263 2021 11 2.49512e+01 1.26111e+00 2560 2021 12 2.34389e+01 4.08823e-01 3616 2022 1 2.25647e+01 1.16660e+00 2147 2022 2 2.06396e+01 8.81278e-01 3038 2022 3 2.32401e+01 1.09795e+00 3399 2022 4 2.53208e+01 1.10365e+00 1594 2022 5 2.75515e+01 1.01855e+00 3122 2022 6 2.91007e+01 1.24140e+00 2601 2022 7 3.04938e+01 7.22200e-01 2207 2022 8 3.07924e+01 1.02831e+00 2259 2022 9 3.09691e+01 9.25832e-01 1931 2022 10 2.76414e+01 1.10791e+00 2698 2022 11 2.61613e+01 8.28930e-01 3069 2022 12 2.44681e+01 1.15296e+00 2745 2023 1 2.12992e+01 8.50135e-01 3172 2023 2 2.26746e+01 1.34165e+00 3744 2023 3 2.45676e+01 8.44271e-01 3853 2023 4 2.64499e+01 8.38154e-01 2751 2023 5 2.83273e+01 1.30173e+00 3372 2023 6 2.97971e+01 9.26141e-01 3043 2023 7 3.14737e+01 1.10648e+00 1937 2023 8 3.13904e+01 1.12004e+00 1893 2023 9 3.10225e+01 1.00419e+00 2608 2023 10 2.85160e+01 1.32953e+00 2806 2023 11 2.55706e+01 7.34925e-01 2253 2023 12 2.25292e+01 1.91185e+00 829 2024 1 2.10074e+01 8.25064e-01 1318 2024 2 2.02648e+01 5.20871e-01 2793 2024 3 2.32030e+01 8.70985e-01 2032 2024 4 2.35908e+01 2.50342e-01 295