YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.10280e+01 3.98530e-01 256 2000 3 2.28512e+01 6.81521e-01 693 2000 4 2.41011e+01 5.47200e-01 773 2000 5 2.61364e+01 1.39672e+00 832 2000 6 2.80228e+01 7.49582e-01 511 2000 7 2.92752e+01 2.55254e+00 634 2000 8 2.94602e+01 3.04834e-01 140 2000 9 2.93807e+01 1.11915e+00 456 2000 10 2.69143e+01 1.13123e+00 767 2000 11 2.52315e+01 7.04494e-01 739 2000 12 2.25444e+01 1.61481e+00 544 2001 1 2.00920e+01 1.16289e+00 633 2001 2 2.09194e+01 1.16876e+00 512 2001 3 2.14933e+01 8.17150e-01 656 2001 4 2.36448e+01 1.61271e+00 704 2001 5 2.47336e+01 1.50497e+00 577 2001 6 2.74476e+01 2.00293e+00 245 2001 7 2.85151e+01 9.01437e-01 591 2001 8 2.91495e+01 1.15179e+00 525 2001 9 2.83547e+01 1.03924e+00 530 2001 10 2.78289e+01 9.04417e-01 247 2001 11 2.42417e+01 4.09048e-01 768 2001 12 2.38925e+01 7.75640e-01 780 2002 1 2.22892e+01 9.96067e-01 633 2002 2 2.16768e+01 6.73105e-01 391 2002 3 2.22155e+01 1.18662e+00 512 2002 4 2.57248e+01 7.75617e-01 951 2002 5 2.68184e+01 6.94088e-01 893 2002 6 2.82545e+01 6.18195e-01 262 2002 7 2.93288e+01 1.40545e+00 1903 2002 8 2.94923e+01 1.02243e+00 1500 2002 9 2.90773e+01 8.34827e-01 1124 2002 10 2.85287e+01 6.20768e-01 3307 2002 11 2.67632e+01 1.72819e+00 2418 2002 12 2.28641e+01 1.17684e+00 2154 2003 1 1.96641e+01 1.64368e+00 1857 2003 2 1.93857e+01 1.05242e+00 2227 2003 3 2.39157e+01 1.07498e+00 2339 2003 4 2.28940e+01 1.13248e+00 2941 2003 5 2.72818e+01 1.25142e+00 3514 2003 6 2.87184e+01 9.23584e-01 1543 2003 7 2.89497e+01 1.25882e+00 2183 2003 8 2.96349e+01 8.02657e-01 1478 2003 9 2.91623e+01 9.06369e-01 1472 2003 10 2.79759e+01 1.27948e+00 2820 2003 11 2.46936e+01 8.09657e-01 3086 2003 12 2.14413e+01 1.19891e+00 1982 2004 1 2.08557e+01 9.32377e-01 2882 2004 2 2.15057e+01 6.43470e-01 2061 2004 3 2.16745e+01 8.92950e-01 3037 2004 4 2.26562e+01 8.95058e-01 2941 2004 5 2.54292e+01 1.52972e+00 3424 2004 6 2.89234e+01 1.10666e+00 2780 2004 7 2.96630e+01 1.07922e+00 2307 2004 8 2.98432e+01 1.26720e+00 2354 2004 9 2.91027e+01 9.80519e-01 1728 2004 10 2.78840e+01 1.02545e+00 2409 2004 11 2.56622e+01 9.20781e-01 3462 2004 12 2.31349e+01 1.69552e+00 2149 2005 1 2.08640e+01 7.94191e-01 2702 2005 2 2.00598e+01 6.19997e-01 2810 2005 3 2.13885e+01 1.60421e+00 2490 2005 4 2.28101e+01 8.69641e-01 2937 2005 5 2.50865e+01 1.61738e+00 3045 2005 6 2.80017e+01 1.12858e+00 1562 2005 7 2.88792e+01 1.36234e+00 1976 2005 8 3.01962e+01 1.35704e+00 2324 2005 9 2.89127e+01 1.08907e+00 2424 2005 10 2.74247e+01 9.28391e-01 1774 2005 11 2.48896e+01 8.65911e-01 2451 2005 12 2.33365e+01 1.30566e+00 2314 2006 1 2.15328e+01 1.04185e+00 3030 2006 2 2.04792e+01 9.13905e-01 2815 2006 3 2.20305e+01 1.47304e+00 3467 2006 4 2.46875e+01 1.40290e+00 3796 2006 5 2.69298e+01 7.94862e-01 2819 2006 6 2.85327e+01 9.20687e-01 2375 2006 7 2.86790e+01 7.28464e-01 1905 2006 8 2.97951e+01 8.66620e-01 2165 2006 9 3.01483e+01 8.70634e-01 2840 2006 10 2.86956e+01 1.46302e+00 2421 2006 11 2.44902e+01 1.09297e+00 2078 2006 12 2.27656e+01 7.01720e-01 1834 2007 1 2.31732e+01 7.49054e-01 2668 2007 2 2.16198e+01 8.60400e-01 1734 2007 3 2.22137e+01 6.74505e-01 3008 2007 4 2.37867e+01 8.07880e-01 2928 2007 5 2.61429e+01 7.78060e-01 3355 2007 6 2.78941e+01 1.37202e+00 2099 2007 7 3.03339e+01 1.17343e+00 2543 2007 8 3.00163e+01 7.26176e-01 2055 2007 9 2.98728e+01 9.47387e-01 1472 2007 10 2.82137e+01 8.88122e-01 2036 2007 11 2.54095e+01 9.79326e-01 3305 2007 12 2.40264e+01 7.63941e-01 3288 2008 1 2.21387e+01 6.95832e-01 2749 2008 2 2.27855e+01 1.53788e+00 2811 2008 3 2.22878e+01 9.48173e-01 2681 2008 4 2.46970e+01 6.88354e-01 3506 2008 5 2.65470e+01 9.88691e-01 3776 2008 6 2.83977e+01 9.11960e-01 2300 2008 7 2.93480e+01 1.75725e+00 1782 2008 8 3.00459e+01 1.05869e+00 2635 2008 9 2.88165e+01 8.39227e-01 1923 2008 10 2.79173e+01 9.86763e-01 1747 2008 11 2.35917e+01 1.30991e+00 2940 2008 12 2.20327e+01 5.70428e-01 3236 2009 1 2.12488e+01 1.18169e+00 2524 2009 2 1.92755e+01 5.45026e-01 2782 2009 3 2.07682e+01 1.32849e+00 3067 2009 4 2.46663e+01 6.17337e-01 3022 2009 5 2.61630e+01 1.06848e+00 3033 2009 6 2.87736e+01 9.59020e-01 2462 2009 7 2.95505e+01 1.18001e+00 2396 2009 8 2.96966e+01 8.51456e-01 2393 2009 9 3.02667e+01 1.09707e+00 2147 2009 10 2.93156e+01 1.25243e+00 3002 2009 11 2.57754e+01 1.40108e+00 1654 2009 12 2.44177e+01 8.70188e-01 2237 2010 1 2.11565e+01 2.07362e+00 1498 2010 2 2.03119e+01 1.34695e+00 1251 2010 3 1.89242e+01 8.54135e-01 2677 2010 4 2.23201e+01 1.72270e+00 2568 2010 5 2.68798e+01 1.25921e+00 3296 2010 6 2.97098e+01 1.29336e+00 2744 2010 7 2.92872e+01 1.31477e+00 2072 2010 8 3.00400e+01 9.37506e-01 2000 2010 9 2.96636e+01 9.22357e-01 2306 2010 10 2.75243e+01 1.31333e+00 3179 2010 11 2.48635e+01 1.10170e+00 2870 2010 12 2.08962e+01 1.96480e+00 3010 2011 1 1.89971e+01 9.32766e-01 2694 2011 2 1.94446e+01 1.20902e+00 3024 2011 3 2.18350e+01 1.64102e+00 3515 2011 4 2.53073e+01 9.78529e-01 3869 2011 5 2.71610e+01 9.15491e-01 3256 2011 6 2.86103e+01 1.37243e+00 2338 2011 7 2.96261e+01 1.28515e+00 1828 2011 8 3.03602e+01 9.84782e-01 1921 2011 9 2.99767e+01 9.01193e-01 2350 2011 10 2.86109e+01 1.28484e+00 1332 2011 11 2.47068e+01 7.43493e-01 3285 2011 12 2.29169e+01 6.99834e-01 2929 2012 1 2.16323e+01 7.61373e-01 2946 2012 2 2.30963e+01 7.11125e-01 1827 2012 3 2.38819e+01 8.00217e-01 3854 2012 4 2.50311e+01 9.42993e-01 2611 2012 5 2.69644e+01 1.21516e+00 2914 2012 6 2.82779e+01 1.41702e+00 1611 2012 7 2.85903e+01 1.49332e+00 1974 2012 8 3.01665e+01 1.16850e+00 2079 2012 9 2.87372e+01 9.98406e-01 2249 2012 10 2.73940e+01 1.09284e+00 2549 2012 11 2.40621e+01 1.27183e+00 3007 2012 12 2.34543e+01 8.27480e-01 3096 2013 1 2.26445e+01 6.86842e-01 2519 2013 2 2.25506e+01 8.51111e-01 2783 2013 3 2.16519e+01 8.31874e-01 2676 2013 4 2.37800e+01 1.76243e+00 2836 2013 5 2.63045e+01 1.05215e+00 3125 2013 6 2.80996e+01 1.19099e+00 2200 2013 7 2.88341e+01 1.18569e+00 2037 2013 8 2.97370e+01 8.76575e-01 1698 2013 9 2.89380e+01 9.79424e-01 1381 2013 10 2.88738e+01 9.36007e-01 2589 2013 11 2.61069e+01 9.47463e-01 2213 2013 12 2.44978e+01 6.09976e-01 1943 2014 1 2.22583e+01 1.10746e+00 1758 2014 2 2.30631e+01 9.25793e-01 2604 2014 3 2.37192e+01 5.56298e-01 3036 2014 4 2.43770e+01 1.01054e+00 2456 2014 5 2.60627e+01 7.54424e-01 2826 2014 6 2.91935e+01 1.14916e+00 2141 2014 7 3.02516e+01 1.27339e+00 2422 2014 8 3.04102e+01 1.20567e+00 2218 2014 9 2.96801e+01 9.15957e-01 1466 2014 10 2.86779e+01 1.40687e+00 1979 2014 11 2.51483e+01 1.47611e+00 2487 2014 12 2.22243e+01 5.76418e-01 2439 2015 1 2.18760e+01 7.49420e-01 1933 2015 2 2.06798e+01 6.86126e-01 2457 2015 3 2.35138e+01 1.71038e+00 3220 2015 4 2.55529e+01 1.53798e+00 2619 2015 5 2.71937e+01 1.06255e+00 3372 2015 6 2.89425e+01 1.01165e+00 2078 2015 7 3.00735e+01 8.21508e-01 2515 2015 8 3.08352e+01 1.21603e+00 1894 2015 9 3.06491e+01 1.14161e+00 1584 2015 10 2.84194e+01 1.53268e+00 2266 2015 11 2.68527e+01 9.92304e-01 2845 2015 12 2.47886e+01 7.15878e-01 2016 2016 1 2.39275e+01 1.40746e+00 1030 2016 2 2.11352e+01 1.10616e+00 1931 2016 3 2.24236e+01 1.92586e+00 1627 2016 4 2.42566e+01 1.09300e+00 3043 2016 5 2.67077e+01 1.57249e+00 3095 2016 6 2.86003e+01 1.05919e+00 2356 2016 7 2.99079e+01 1.18586e+00 2523 2016 8 3.00315e+01 1.09138e+00 2214 2016 9 3.01438e+01 1.02189e+00 2184 2016 10 2.79763e+01 1.30279e+00 2353 2016 11 2.45384e+01 8.84644e-01 3679 2016 12 2.38845e+01 5.44884e-01 2954 2017 1 2.23736e+01 6.30673e-01 3050 2017 2 2.20139e+01 7.37728e-01 2939 2017 3 2.26217e+01 6.21361e-01 3789 2017 4 2.45591e+01 8.85467e-01 2400 2017 5 2.68933e+01 1.06928e+00 2957 2017 6 2.88393e+01 1.41825e+00 1538 2017 7 2.97331e+01 9.58174e-01 1704 2017 8 3.08083e+01 9.42037e-01 2170 2017 9 2.99324e+01 1.05600e+00 1851 2017 10 2.83371e+01 9.09175e-01 1915 2017 11 2.56217e+01 6.95025e-01 3491 2017 12 2.40051e+01 1.07830e+00 3334 2018 1 2.12349e+01 1.27548e+00 1927 2018 2 2.22497e+01 1.57068e+00 3246 2018 3 2.36640e+01 8.50714e-01 3495 2018 4 2.45392e+01 9.46302e-01 3420 2018 5 2.48780e+01 7.65915e-01 1165 2018 6 2.84349e+01 1.60233e+00 2011 2018 7 3.01873e+01 8.97905e-01 2185 2018 8 2.96132e+01 9.07963e-01 1277 2018 9 2.96582e+01 1.15539e+00 2063 2018 10 2.81801e+01 8.07854e-01 3325 2018 11 2.62517e+01 1.05574e+00 2469 2018 12 2.36624e+01 1.47536e+00 2348 2019 1 2.32507e+01 1.27746e+00 2373 2019 2 2.29522e+01 1.97194e+00 3042 2019 3 2.49967e+01 9.69733e-01 3086 2019 4 2.54395e+01 7.32826e-01 3234 2019 5 2.71965e+01 1.10617e+00 3230 2019 6 2.96797e+01 1.21468e+00 2626 2019 7 3.00829e+01 1.17677e+00 1867 2019 8 3.07149e+01 9.24026e-01 1853 2019 9 2.95802e+01 1.28523e+00 2413 2019 10 2.82149e+01 9.97058e-01 2501 2019 11 2.69725e+01 1.32748e+00 2542 2019 12 2.44502e+01 9.40435e-01 2099 2020 1 2.28656e+01 1.28439e+00 3100 2020 2 2.19784e+01 7.65577e-01 3211 2020 3 2.34744e+01 1.39070e+00 4007 2020 4 2.65852e+01 8.87028e-01 2823 2020 5 2.68138e+01 1.09544e+00 2030 2020 6 2.93500e+01 1.06644e+00 1682 2020 7 3.02337e+01 1.20522e+00 1537 2020 8 3.01955e+01 1.15281e+00 1965 2020 9 3.00092e+01 9.69051e-01 1772 2020 10 2.89314e+01 1.23081e+00 1267 2020 11 2.59366e+01 1.25188e+00 2718 2020 12 2.33820e+01 1.17463e+00 2394 2021 1 2.16428e+01 7.27020e-01 1985 2021 2 2.18156e+01 8.78850e-01 2918 2021 3 2.30216e+01 1.01850e+00 3450 2021 4 2.44139e+01 1.11033e+00 3234 2021 5 2.68139e+01 9.38517e-01 2701 2021 6 2.77784e+01 8.24386e-01 1080 2021 7 2.93960e+01 1.16620e+00 2644 2021 8 3.00980e+01 9.73542e-01 1862 2021 9 3.00514e+01 9.60374e-01 2250 2021 10 2.89798e+01 9.60494e-01 2146 2021 11 2.55434e+01 1.37226e+00 2163 2021 12 2.44099e+01 4.62146e-01 3829 2022 1 2.36905e+01 9.80748e-01 1750 2022 2 2.17938e+01 9.80960e-01 2635 2022 3 2.44754e+01 1.01459e+00 3586 2022 4 2.53733e+01 8.31466e-01 1836 2022 5 2.71963e+01 1.03579e+00 3099 2022 6 2.89707e+01 1.24896e+00 2306 2022 7 2.98095e+01 8.28913e-01 2411 2022 8 3.00932e+01 1.05732e+00 1929 2022 9 3.07720e+01 8.90085e-01 1619 2022 10 2.76295e+01 7.75263e-01 2196 2022 11 2.65640e+01 6.19071e-01 2740 2022 12 2.51925e+01 1.20767e+00 2670 2023 1 2.22198e+01 8.55492e-01 3278 2023 2 2.40218e+01 8.07834e-01 3615 2023 3 2.49230e+01 9.38385e-01 3586 2023 4 2.65511e+01 6.78435e-01 2641 2023 5 2.80993e+01 7.99096e-01 3288 2023 6 2.92911e+01 9.14754e-01 2670 2023 7 3.10248e+01 1.17352e+00 2292 2023 8 3.13011e+01 1.15385e+00 1749 2023 9 3.05783e+01 7.95657e-01 2785 2023 10 2.88672e+01 1.06195e+00 2324 2023 11 2.62016e+01 8.87874e-01 2531 2023 12 2.39943e+01 1.90579e+00 1312 2024 1 2.29282e+01 8.67295e-01 1263 2024 2 2.12695e+01 6.56073e-01 2463 2024 3 2.35155e+01 1.05426e+00 1892 2024 4 2.41469e+01 3.94918e-01 374