YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.36731e+01 5.35677e-01 195 2000 3 2.45393e+01 3.50465e-01 536 2000 4 2.49776e+01 1.00499e+00 532 2000 5 2.67771e+01 9.69112e-01 403 2000 6 2.80703e+01 1.01801e+00 216 2000 7 2.97369e+01 1.05089e+00 498 2000 8 2.87372e+01 1.05963e+00 280 2000 9 2.88991e+01 9.17306e-01 467 2000 10 2.81177e+01 6.32859e-01 610 2000 11 2.61417e+01 7.09483e-01 448 2000 12 2.47464e+01 5.11046e-01 279 2001 1 2.33922e+01 1.14962e+00 516 2001 2 2.38111e+01 1.05109e+00 763 2001 3 2.39571e+01 8.51222e-01 776 2001 4 2.57153e+01 1.00070e+00 677 2001 5 2.56960e+01 7.60814e-01 321 2001 6 2.79822e+01 4.36651e-01 146 2001 7 2.81277e+01 1.26594e+00 448 2001 8 2.88301e+01 1.47351e+00 472 2001 9 2.89880e+01 1.70811e+00 239 2001 10 2.77242e+01 7.00925e-01 512 2001 11 2.62788e+01 9.19552e-01 473 2001 12 2.50707e+01 9.47606e-01 635 2002 1 2.37328e+01 6.85438e-01 373 2002 2 2.39533e+01 9.14533e-01 249 2002 3 2.48445e+01 1.01060e+00 575 2002 4 2.61610e+01 7.33081e-01 463 2002 5 2.70880e+01 5.65125e-01 700 2002 6 2.81249e+01 6.05436e-01 352 2002 7 2.87908e+01 1.18761e+00 2122 2002 8 2.95027e+01 9.11114e-01 1696 2002 9 2.85372e+01 1.08365e+00 1515 2002 10 2.80981e+01 8.22442e-01 2779 2002 11 2.70674e+01 1.07036e+00 2220 2002 12 2.51538e+01 1.03394e+00 2049 2003 1 2.31216e+01 9.50350e-01 2332 2003 2 2.23055e+01 7.83227e-01 2550 2003 3 2.52173e+01 1.09266e+00 2499 2003 4 2.55448e+01 9.47162e-01 2097 2003 5 2.70369e+01 1.12839e+00 2758 2003 6 2.86609e+01 1.06396e+00 1538 2003 7 2.84652e+01 1.17562e+00 2013 2003 8 2.98533e+01 8.96277e-01 1484 2003 9 2.94300e+01 9.10811e-01 1722 2003 10 2.83761e+01 1.10578e+00 2529 2003 11 2.69637e+01 6.04676e-01 2113 2003 12 2.48558e+01 1.08217e+00 1788 2004 1 2.50450e+01 1.05813e+00 2657 2004 2 2.38516e+01 1.16135e+00 2149 2004 3 2.45091e+01 9.13450e-01 2334 2004 4 2.40956e+01 8.41457e-01 2417 2004 5 2.60252e+01 9.54712e-01 2359 2004 6 2.83768e+01 1.20505e+00 2567 2004 7 2.90469e+01 1.29574e+00 1911 2004 8 3.00593e+01 1.17411e+00 2057 2004 9 2.91848e+01 1.36598e+00 1666 2004 10 2.77809e+01 1.22911e+00 2443 2004 11 2.67945e+01 7.36174e-01 2630 2004 12 2.54546e+01 1.21939e+00 1708 2005 1 2.42315e+01 6.37459e-01 2757 2005 2 2.33713e+01 8.32475e-01 1956 2005 3 2.38090e+01 8.74435e-01 2347 2005 4 2.43401e+01 9.41723e-01 2973 2005 5 2.61528e+01 1.57799e+00 2913 2005 6 2.78908e+01 9.81585e-01 1513 2005 7 2.91214e+01 1.15559e+00 2059 2005 8 3.00535e+01 1.03673e+00 2395 2005 9 2.93376e+01 1.08429e+00 2185 2005 10 2.78651e+01 7.45546e-01 1785 2005 11 2.55394e+01 9.62710e-01 2527 2005 12 2.41257e+01 9.83352e-01 2530 2006 1 2.35541e+01 1.02976e+00 2165 2006 2 2.33182e+01 8.93967e-01 2194 2006 3 2.46653e+01 1.23267e+00 2804 2006 4 2.58078e+01 1.05503e+00 3115 2006 5 2.69950e+01 9.79197e-01 2624 2006 6 2.84661e+01 1.10963e+00 2078 2006 7 2.87748e+01 1.00679e+00 1409 2006 8 2.96029e+01 8.74709e-01 2083 2006 9 3.00577e+01 7.88602e-01 2407 2006 10 2.84483e+01 8.73585e-01 2365 2006 11 2.60381e+01 7.91758e-01 1409 2006 12 2.50122e+01 8.88780e-01 1097 2007 1 2.49925e+01 7.11349e-01 1663 2007 2 2.38398e+01 9.34305e-01 1469 2007 3 2.43535e+01 7.35952e-01 2170 2007 4 2.47740e+01 9.74652e-01 2832 2007 5 2.68974e+01 1.05153e+00 2568 2007 6 2.78747e+01 1.48722e+00 1959 2007 7 2.99179e+01 9.95443e-01 2594 2007 8 2.98644e+01 7.76130e-01 2479 2007 9 2.99288e+01 7.87267e-01 1931 2007 10 2.81195e+01 1.26625e+00 1547 2007 11 2.67198e+01 9.74591e-01 2604 2007 12 2.54743e+01 6.68654e-01 2473 2008 1 2.41645e+01 9.26552e-01 2400 2008 2 2.42392e+01 1.08068e+00 2200 2008 3 2.43136e+01 9.31008e-01 1838 2008 4 2.52185e+01 7.47803e-01 3019 2008 5 2.68031e+01 1.15248e+00 3218 2008 6 2.79321e+01 9.50645e-01 2142 2008 7 2.86465e+01 1.25891e+00 2053 2008 8 3.00175e+01 8.69990e-01 2180 2008 9 2.83945e+01 8.11744e-01 1816 2008 10 2.80153e+01 9.43346e-01 1561 2008 11 2.58384e+01 7.93933e-01 2334 2008 12 2.42022e+01 9.93988e-01 2210 2009 1 2.30426e+01 1.21481e+00 2366 2009 2 2.28174e+01 1.07816e+00 2241 2009 3 2.39424e+01 9.75907e-01 2275 2009 4 2.49318e+01 6.56234e-01 2947 2009 5 2.63616e+01 1.21410e+00 3406 2009 6 2.91007e+01 1.46261e+00 1709 2009 7 2.92929e+01 9.66092e-01 2459 2009 8 2.96551e+01 6.90744e-01 2074 2009 9 3.00745e+01 8.59242e-01 1915 2009 10 2.92079e+01 9.83470e-01 2586 2009 11 2.71403e+01 8.42886e-01 1775 2009 12 2.52986e+01 1.07058e+00 1912 2010 1 2.41382e+01 1.50296e+00 1593 2010 2 2.27340e+01 1.11442e+00 1534 2010 3 2.25075e+01 1.26534e+00 2249 2010 4 2.45298e+01 1.16817e+00 1848 2010 5 2.70836e+01 1.11866e+00 3246 2010 6 2.98145e+01 9.41237e-01 2393 2010 7 2.91736e+01 9.73456e-01 1509 2010 8 3.00473e+01 1.07656e+00 1757 2010 9 2.95634e+01 1.02972e+00 1803 2010 10 2.79930e+01 8.30409e-01 2802 2010 11 2.65933e+01 1.08453e+00 2315 2010 12 2.41323e+01 1.51851e+00 3012 2011 1 2.27534e+01 7.89483e-01 2197 2011 2 2.19991e+01 8.83907e-01 2787 2011 3 2.42601e+01 1.16280e+00 3155 2011 4 2.59670e+01 8.05470e-01 3692 2011 5 2.70238e+01 8.56652e-01 3065 2011 6 2.83226e+01 1.16109e+00 2039 2011 7 2.96481e+01 9.56538e-01 2123 2011 8 3.01960e+01 8.41621e-01 1522 2011 9 2.99823e+01 8.48221e-01 2248 2011 10 2.82949e+01 1.22368e+00 1299 2011 11 2.59975e+01 6.75713e-01 2669 2011 12 2.47934e+01 9.11557e-01 2166 2012 1 2.41515e+01 7.37932e-01 2346 2012 2 2.43587e+01 6.19510e-01 1624 2012 3 2.49235e+01 5.31717e-01 2857 2012 4 2.58145e+01 8.58545e-01 2334 2012 5 2.67980e+01 1.01159e+00 1861 2012 6 2.84247e+01 9.36735e-01 1418 2012 7 2.86861e+01 8.78752e-01 2038 2012 8 2.92105e+01 1.03977e+00 2293 2012 9 2.91747e+01 8.63787e-01 1783 2012 10 2.82687e+01 7.56312e-01 2034 2012 11 2.71120e+01 7.74731e-01 2534 2012 12 2.55380e+01 8.95396e-01 1939 2013 1 2.43267e+01 7.05338e-01 1681 2013 2 2.44991e+01 7.86434e-01 2163 2013 3 2.38312e+01 7.76859e-01 2562 2013 4 2.57884e+01 1.50928e+00 2441 2013 5 2.64547e+01 8.07667e-01 2599 2013 6 2.78569e+01 8.95939e-01 1680 2013 7 2.90875e+01 1.04945e+00 1980 2013 8 2.89539e+01 1.17077e+00 1239 2013 9 2.89290e+01 7.10966e-01 1577 2013 10 2.84391e+01 6.72934e-01 2311 2013 11 2.71841e+01 8.29198e-01 1450 2013 12 2.59110e+01 9.23692e-01 2104 2014 1 2.49319e+01 1.02362e+00 1558 2014 2 2.48156e+01 8.52014e-01 2909 2014 3 2.46079e+01 7.16085e-01 2701 2014 4 2.55633e+01 8.27405e-01 2525 2014 5 2.65214e+01 7.18820e-01 2124 2014 6 2.86835e+01 1.10293e+00 2059 2014 7 2.98793e+01 1.08197e+00 2284 2014 8 3.06429e+01 9.59426e-01 2630 2014 9 2.96035e+01 1.09047e+00 1565 2014 10 2.85992e+01 1.21310e+00 2209 2014 11 2.65578e+01 8.30729e-01 2224 2014 12 2.53981e+01 7.57029e-01 2192 2015 1 2.49314e+01 7.46158e-01 1576 2015 2 2.39300e+01 1.01712e+00 2067 2015 3 2.50984e+01 1.19069e+00 3052 2015 4 2.63422e+01 1.19033e+00 2607 2015 5 2.71862e+01 8.13575e-01 2954 2015 6 2.89463e+01 1.19281e+00 2160 2015 7 2.96183e+01 1.29760e+00 2664 2015 8 3.03661e+01 7.33274e-01 2389 2015 9 3.03868e+01 1.45192e+00 1722 2015 10 2.85646e+01 1.10119e+00 1821 2015 11 2.76397e+01 7.54806e-01 2292 2015 12 2.62097e+01 4.27361e-01 1680 2016 1 2.59713e+01 8.48846e-01 891 2016 2 2.47818e+01 7.21078e-01 1548 2016 3 2.51676e+01 1.41066e+00 1753 2016 4 2.60650e+01 9.66261e-01 2627 2016 5 2.74543e+01 1.16351e+00 2956 2016 6 2.86678e+01 1.02532e+00 2017 2016 7 2.93897e+01 8.38436e-01 2408 2016 8 2.97613e+01 9.12287e-01 1719 2016 9 2.94766e+01 9.84042e-01 2040 2016 10 2.89563e+01 8.20095e-01 1285 2016 11 2.71033e+01 1.01125e+00 2538 2016 12 2.60918e+01 8.21950e-01 2518 2017 1 2.50834e+01 9.28357e-01 2242 2017 2 2.41443e+01 9.07576e-01 2867 2017 3 2.50537e+01 9.78667e-01 2613 2017 4 2.57745e+01 7.95949e-01 1843 2017 5 2.71117e+01 1.21400e+00 2386 2017 6 2.84429e+01 1.39506e+00 1567 2017 7 2.93245e+01 8.57487e-01 2370 2017 8 3.02974e+01 8.68779e-01 2524 2017 9 2.98253e+01 8.75469e-01 2082 2017 10 2.83735e+01 9.94418e-01 1592 2017 11 2.67991e+01 5.57351e-01 2655 2017 12 2.57302e+01 9.41716e-01 3391 2018 1 2.41125e+01 1.05819e+00 1327 2018 2 2.43939e+01 9.16562e-01 2860 2018 3 2.51582e+01 7.35871e-01 2751 2018 4 2.58742e+01 5.99688e-01 2619 2018 5 2.55775e+01 7.29357e-01 982 2018 6 2.86648e+01 1.06794e+00 1824 2018 7 2.98556e+01 1.29654e+00 2260 2018 8 2.97196e+01 9.06598e-01 2778 2018 9 2.94473e+01 9.25302e-01 2416 2018 10 2.80839e+01 6.93871e-01 2753 2018 11 2.71062e+01 8.31612e-01 1855 2018 12 2.57528e+01 1.50107e+00 2260 2019 1 2.44698e+01 8.36328e-01 1985 2019 2 2.53504e+01 1.01869e+00 2720 2019 3 2.59454e+01 9.02584e-01 2765 2019 4 2.60075e+01 7.34646e-01 2715 2019 5 2.74034e+01 8.14645e-01 2995 2019 6 2.96738e+01 1.31201e+00 2662 2019 7 2.97573e+01 8.87609e-01 2439 2019 8 3.04543e+01 1.13816e+00 2135 2019 9 2.94630e+01 9.38119e-01 2195 2019 10 2.85116e+01 8.27651e-01 2030 2019 11 2.76762e+01 9.08798e-01 2348 2019 12 2.55537e+01 1.05152e+00 2011 2020 1 2.50387e+01 9.53735e-01 2324 2020 2 2.53658e+01 1.13004e+00 1994 2020 3 2.49675e+01 7.61058e-01 3533 2020 4 2.71794e+01 1.22559e+00 2623 2020 5 2.74066e+01 9.06371e-01 1746 2020 6 2.89881e+01 7.53784e-01 1565 2020 7 2.98332e+01 1.35800e+00 1899 2020 8 2.98871e+01 1.09427e+00 2434 2020 9 2.98438e+01 8.95449e-01 1964 2020 10 2.87873e+01 1.17256e+00 1344 2020 11 2.72035e+01 7.72129e-01 1733 2020 12 2.54438e+01 1.10531e+00 2180 2021 1 2.40096e+01 8.24800e-01 2456 2021 2 2.40945e+01 1.07405e+00 2465 2021 3 2.46791e+01 6.26839e-01 2931 2021 4 2.58888e+01 6.82423e-01 2549 2021 5 2.72869e+01 1.09605e+00 2774 2021 6 2.79084e+01 1.36694e+00 1207 2021 7 2.93478e+01 1.13885e+00 2717 2021 8 2.98315e+01 9.20815e-01 2115 2021 9 3.00160e+01 1.03466e+00 2716 2021 10 2.90999e+01 8.10677e-01 2096 2021 11 2.68658e+01 8.28935e-01 1930 2021 12 2.60117e+01 6.37145e-01 2857 2022 1 2.52336e+01 7.96880e-01 1848 2022 2 2.44003e+01 7.72648e-01 2331 2022 3 2.53882e+01 7.07592e-01 2811 2022 4 2.57442e+01 6.63121e-01 1539 2022 5 2.73785e+01 1.06186e+00 2623 2022 6 2.88673e+01 1.18998e+00 1934 2022 7 2.95802e+01 7.66052e-01 2432 2022 8 3.00655e+01 1.00850e+00 2509 2022 9 3.06658e+01 9.76166e-01 2379 2022 10 2.82015e+01 8.75817e-01 2421 2022 11 2.72591e+01 7.46321e-01 2596 2022 12 2.62127e+01 6.84629e-01 2469 2023 1 2.53411e+01 8.35630e-01 3241 2023 2 2.51109e+01 9.44461e-01 3220 2023 3 2.55115e+01 6.93211e-01 3141 2023 4 2.65574e+01 8.29038e-01 2219 2023 5 2.78212e+01 1.35653e+00 2812 2023 6 2.93273e+01 9.92780e-01 2004 2023 7 3.07483e+01 8.81140e-01 2451 2023 8 3.09894e+01 9.81906e-01 2408 2023 9 3.07158e+01 9.38553e-01 1937 2023 10 2.91474e+01 1.10651e+00 2693 2023 11 2.74893e+01 7.15632e-01 2462 2023 12 2.62441e+01 9.90547e-01 1554 2024 1 2.51310e+01 6.48525e-01 1571 2024 2 2.38139e+01 7.15566e-01 2450 2024 3 2.50794e+01 9.10564e-01 2065 2024 4 2.47391e+01 2.14305e-01 105