YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.60167e+01 9.72186e-02 192 2000 3 2.55297e+01 4.61703e-01 449 2000 4 2.60446e+01 4.40104e-01 442 2000 5 2.73166e+01 8.92625e-01 818 2000 6 2.63653e+01 1.29167e+00 389 2000 7 2.73867e+01 9.32901e-01 731 2000 8 2.80950e+01 7.64405e-01 328 2000 9 2.89763e+01 3.89912e-01 578 2000 10 2.90111e+01 7.11847e-01 721 2000 11 2.80090e+01 8.95778e-01 959 2000 12 2.65395e+01 7.55383e-01 636 2001 1 2.58934e+01 6.65045e-01 594 2001 2 2.58146e+01 5.22632e-01 554 2001 3 2.59832e+01 4.78601e-01 616 2001 4 2.66713e+01 6.60696e-01 691 2001 5 2.70324e+01 4.67395e-01 563 2001 6 2.76466e+01 6.37976e-01 300 2001 7 2.72867e+01 1.12864e+00 442 2001 8 2.82937e+01 5.97321e-01 654 2001 9 2.88270e+01 7.78803e-01 834 2001 10 2.84148e+01 2.83509e-01 443 2001 11 2.81292e+01 9.79667e-01 471 2001 12 2.72773e+01 6.67968e-01 689 2002 1 2.65814e+01 6.81144e-01 854 2002 2 2.62134e+01 4.54376e-01 814 2002 3 2.61882e+01 6.19422e-01 833 2002 4 2.66403e+01 5.37302e-01 646 2002 5 2.69302e+01 4.45770e-01 741 2002 6 2.68243e+01 8.27957e-01 411 2002 7 2.74693e+01 8.21453e-01 2055 2002 8 2.85398e+01 6.17952e-01 1620 2002 9 2.88247e+01 8.06294e-01 1905 2002 10 2.87740e+01 6.12271e-01 2974 2002 11 2.83752e+01 5.21039e-01 3613 2002 12 2.70940e+01 5.41754e-01 3067 2003 1 2.67503e+01 4.44375e-01 3216 2003 2 2.63277e+01 5.42475e-01 2565 2003 3 2.66399e+01 6.73124e-01 3260 2003 4 2.72931e+01 7.34915e-01 1653 2003 5 2.73743e+01 8.76208e-01 2297 2003 6 2.71695e+01 5.89952e-01 839 2003 7 2.68982e+01 1.13644e+00 1148 2003 8 2.82059e+01 6.78670e-01 2132 2003 9 2.92252e+01 6.76164e-01 1956 2003 10 2.91526e+01 6.35995e-01 2641 2003 11 2.82448e+01 6.19158e-01 1670 2003 12 2.74025e+01 6.53806e-01 2434 2004 1 2.67239e+01 5.19971e-01 3353 2004 2 2.62296e+01 5.27835e-01 2732 2004 3 2.63774e+01 4.22452e-01 3416 2004 4 2.74302e+01 6.17337e-01 2920 2004 5 2.72963e+01 7.74558e-01 1527 2004 6 2.75087e+01 7.74934e-01 1207 2004 7 2.77613e+01 7.45322e-01 1824 2004 8 2.85113e+01 6.88304e-01 2050 2004 9 2.88634e+01 8.61315e-01 1228 2004 10 2.90699e+01 6.81067e-01 2438 2004 11 2.78151e+01 6.93137e-01 2275 2004 12 2.68786e+01 5.00129e-01 3595 2005 1 2.62325e+01 3.87538e-01 3085 2005 2 2.59785e+01 4.56074e-01 3415 2005 3 2.66036e+01 6.43969e-01 3733 2005 4 2.75712e+01 8.87293e-01 2677 2005 5 2.83434e+01 9.31128e-01 1628 2005 6 2.85921e+01 8.33160e-01 1493 2005 7 2.87224e+01 5.37825e-01 1330 2005 8 2.89203e+01 9.68237e-01 1665 2005 9 2.94913e+01 8.33262e-01 1927 2005 10 2.89734e+01 9.95515e-01 1123 2005 11 2.82753e+01 7.05141e-01 2419 2005 12 2.74113e+01 5.97993e-01 3232 2006 1 2.63586e+01 4.45062e-01 2576 2006 2 2.62257e+01 3.66334e-01 3383 2006 3 2.64788e+01 4.63825e-01 3377 2006 4 2.75346e+01 6.38388e-01 2783 2006 5 2.81250e+01 5.33312e-01 2144 2006 6 2.85500e+01 7.64837e-01 1464 2006 7 2.80476e+01 5.95052e-01 1815 2006 8 2.82083e+01 5.95003e-01 1992 2006 9 2.92654e+01 8.30420e-01 2729 2006 10 2.93422e+01 7.09065e-01 2235 2006 11 2.84809e+01 6.44240e-01 3088 2006 12 2.74652e+01 6.61589e-01 3678 2007 1 2.66591e+01 3.59590e-01 3607 2007 2 2.64955e+01 5.14588e-01 2856 2007 3 2.64639e+01 7.06944e-01 2518 2007 4 2.72115e+01 6.90018e-01 2843 2007 5 2.82552e+01 7.90651e-01 1710 2007 6 2.80904e+01 7.22211e-01 1491 2007 7 2.78999e+01 7.04592e-01 1407 2007 8 2.83365e+01 7.85902e-01 1690 2007 9 2.90151e+01 5.64475e-01 2286 2007 10 2.91162e+01 8.08434e-01 1551 2007 11 2.80276e+01 6.04405e-01 2040 2007 12 2.71135e+01 5.80615e-01 3059 2008 1 2.65227e+01 4.91403e-01 3524 2008 2 2.58850e+01 4.06566e-01 3132 2008 3 2.58799e+01 4.60687e-01 2831 2008 4 2.62756e+01 6.51473e-01 2504 2008 5 2.72541e+01 9.68211e-01 2372 2008 6 2.79372e+01 6.15726e-01 1339 2008 7 2.78301e+01 7.04086e-01 2650 2008 8 2.87076e+01 6.64685e-01 2222 2008 9 2.88103e+01 8.77659e-01 1577 2008 10 2.87359e+01 6.16086e-01 2847 2008 11 2.82675e+01 7.29214e-01 2198 2008 12 2.66750e+01 5.01069e-01 3269 2009 1 2.60482e+01 5.50630e-01 3242 2009 2 2.59853e+01 4.26100e-01 2673 2009 3 2.57872e+01 4.76867e-01 2621 2009 4 2.64994e+01 5.78851e-01 2788 2009 5 2.68824e+01 9.64901e-01 1944 2009 6 2.76511e+01 9.66809e-01 1173 2009 7 2.81231e+01 7.15725e-01 1876 2009 8 2.82340e+01 7.55767e-01 2622 2009 9 2.88987e+01 7.70223e-01 2187 2009 10 2.90690e+01 6.30295e-01 2869 2009 11 2.87329e+01 5.06724e-01 2605 2009 12 2.76896e+01 5.92017e-01 3049 2010 1 2.70039e+01 6.01029e-01 2514 2010 2 2.69760e+01 5.63102e-01 2596 2010 3 2.76439e+01 6.29417e-01 2808 2010 4 2.74327e+01 6.70383e-01 2267 2010 5 2.83434e+01 5.56857e-01 1843 2010 6 2.87292e+01 6.06560e-01 1777 2010 7 2.83718e+01 7.84353e-01 1551 2010 8 2.92765e+01 8.00252e-01 2364 2010 9 2.94695e+01 5.84997e-01 1305 2010 10 2.90734e+01 6.58145e-01 2535 2010 11 2.76352e+01 6.60666e-01 1880 2010 12 2.69630e+01 7.57576e-01 2117 2011 1 2.61678e+01 4.75176e-01 2856 2011 2 2.60471e+01 5.52784e-01 3117 2011 3 2.61701e+01 4.47525e-01 3494 2011 4 2.68608e+01 7.24504e-01 2914 2011 5 2.74610e+01 9.00520e-01 1463 2011 6 2.83513e+01 9.36631e-01 1230 2011 7 2.83201e+01 7.36699e-01 1588 2011 8 2.84906e+01 6.78171e-01 2050 2011 9 2.91413e+01 1.02734e+00 2230 2011 10 2.89938e+01 5.85481e-01 2373 2011 11 2.83229e+01 4.65532e-01 2418 2011 12 2.77213e+01 6.31844e-01 2953 2012 1 2.64800e+01 4.73062e-01 3504 2012 2 2.62686e+01 3.95661e-01 3548 2012 3 2.61539e+01 4.43928e-01 3424 2012 4 2.69259e+01 9.57990e-01 1890 2012 5 2.70303e+01 9.38645e-01 1785 2012 6 2.76932e+01 7.28743e-01 1902 2012 7 2.80583e+01 6.65479e-01 1879 2012 8 2.83419e+01 4.78469e-01 1545 2012 9 2.89658e+01 7.67834e-01 2588 2012 10 2.92199e+01 8.18229e-01 1713 2012 11 2.88475e+01 5.76778e-01 3354 2012 12 2.75005e+01 6.97179e-01 2907 2013 1 2.64925e+01 4.24104e-01 3173 2013 2 2.60309e+01 3.08441e-01 3313 2013 3 2.66909e+01 6.70121e-01 2714 2013 4 2.72300e+01 6.52639e-01 3498 2013 5 2.79172e+01 9.80663e-01 2133 2013 6 2.69411e+01 1.36188e+00 719 2013 7 2.81486e+01 7.09839e-01 2738 2013 8 2.85379e+01 6.00374e-01 1665 2013 9 2.91707e+01 9.42827e-01 1480 2013 10 2.94893e+01 8.46180e-01 1767 2013 11 2.84326e+01 5.02475e-01 2800 2013 12 2.69168e+01 5.98814e-01 2801 2014 1 2.63366e+01 5.80683e-01 3340 2014 2 2.62541e+01 4.11840e-01 3221 2014 3 2.65759e+01 7.18861e-01 3598 2014 4 2.66834e+01 8.17562e-01 2671 2014 5 2.74143e+01 8.63475e-01 2046 2014 6 2.74886e+01 1.02354e+00 1240 2014 7 2.77249e+01 7.19877e-01 1604 2014 8 2.81204e+01 8.12453e-01 1615 2014 9 2.86144e+01 8.03685e-01 1875 2014 10 2.90976e+01 7.71168e-01 2830 2014 11 2.85311e+01 6.13869e-01 2815 2014 12 2.75109e+01 7.52196e-01 3690 2015 1 2.67580e+01 4.46220e-01 3212 2015 2 2.68033e+01 5.49155e-01 2739 2015 3 2.64589e+01 5.80948e-01 3175 2015 4 2.67073e+01 6.02394e-01 3005 2015 5 2.71514e+01 8.04267e-01 1822 2015 6 2.78114e+01 8.65448e-01 1516 2015 7 2.75047e+01 6.12795e-01 2133 2015 8 2.83862e+01 5.91591e-01 2580 2015 9 2.88815e+01 8.13708e-01 2577 2015 10 2.93856e+01 7.36193e-01 2452 2015 11 2.82383e+01 6.94145e-01 2087 2015 12 2.73619e+01 6.65350e-01 2369 2016 1 2.67139e+01 5.80844e-01 2674 2016 2 2.66786e+01 5.53971e-01 2554 2016 3 2.67312e+01 5.53629e-01 2707 2016 4 2.74007e+01 8.08459e-01 2535 2016 5 2.75940e+01 6.81376e-01 1215 2016 6 2.78448e+01 1.17896e+00 1136 2016 7 2.82415e+01 6.79386e-01 2407 2016 8 2.86824e+01 4.53708e-01 1876 2016 9 2.94597e+01 6.19325e-01 3007 2016 10 2.91358e+01 9.65103e-01 1869 2016 11 2.86356e+01 5.05335e-01 1210 2016 12 2.75413e+01 6.13537e-01 3107 2017 1 2.66078e+01 5.33475e-01 2908 2017 2 2.66884e+01 5.27163e-01 3263 2017 3 2.65384e+01 6.11283e-01 2641 2017 4 2.73053e+01 6.87677e-01 2754 2017 5 2.77207e+01 6.48441e-01 2189 2017 6 2.81425e+01 7.39600e-01 2202 2017 7 2.85860e+01 5.80208e-01 2134 2017 8 2.86175e+01 6.52859e-01 2165 2017 9 2.92051e+01 8.98750e-01 945 2017 10 2.84415e+01 8.17041e-01 2040 2017 11 2.83505e+01 6.66929e-01 1761 2017 12 2.77385e+01 5.94200e-01 3759 2018 1 2.67549e+01 5.25769e-01 2653 2018 2 2.60477e+01 3.34509e-01 2697 2018 3 2.66569e+01 6.07709e-01 3119 2018 4 2.70131e+01 5.63521e-01 2398 2018 5 2.71692e+01 6.22212e-01 2438 2018 6 2.74838e+01 9.05428e-01 1579 2018 7 2.74553e+01 6.62794e-01 904 2018 8 2.81954e+01 6.68832e-01 2787 2018 9 2.88869e+01 4.70004e-01 2633 2018 10 2.85765e+01 6.42239e-01 2317 2018 11 2.80945e+01 7.48430e-01 2950 2018 12 2.70797e+01 5.95624e-01 3597 2019 1 2.63087e+01 5.34067e-01 2877 2019 2 2.62390e+01 4.50554e-01 2829 2019 3 2.63826e+01 5.74411e-01 3012 2019 4 2.68830e+01 5.34388e-01 3242 2019 5 2.71964e+01 1.01127e+00 1410 2019 6 2.76973e+01 6.69506e-01 2534 2019 7 2.82465e+01 6.24722e-01 2262 2019 8 2.85366e+01 7.91948e-01 2612 2019 9 2.91350e+01 8.98536e-01 1538 2019 10 2.92542e+01 6.25470e-01 2732 2019 11 2.88388e+01 4.39589e-01 3590 2019 12 2.81788e+01 7.51067e-01 2771 2020 1 2.71067e+01 5.93469e-01 2643 2020 2 2.67593e+01 4.66891e-01 3498 2020 3 2.70227e+01 4.27860e-01 2884 2020 4 2.75566e+01 6.06779e-01 3367 2020 5 2.78562e+01 9.59254e-01 2136 2020 6 2.87864e+01 6.94032e-01 2115 2020 7 2.85906e+01 7.33986e-01 2106 2020 8 2.90325e+01 7.18787e-01 2031 2020 9 2.96161e+01 8.85821e-01 2238 2020 10 2.90946e+01 6.12521e-01 1997 2020 11 2.78389e+01 8.11921e-01 2149 2020 12 2.74374e+01 4.18700e-01 3467 2021 1 2.67578e+01 5.49996e-01 3070 2021 2 2.62520e+01 4.47911e-01 3081 2021 3 2.65643e+01 4.69938e-01 4258 2021 4 2.68540e+01 6.82387e-01 2366 2021 5 2.73090e+01 7.87819e-01 2627 2021 6 2.76685e+01 6.61092e-01 1370 2021 7 2.77388e+01 8.26838e-01 2087 2021 8 2.84247e+01 5.41815e-01 2106 2021 9 2.94008e+01 8.83561e-01 2647 2021 10 2.93337e+01 6.68005e-01 2318 2021 11 2.85574e+01 6.40433e-01 3179 2021 12 2.77408e+01 5.01920e-01 3748 2022 1 2.68464e+01 3.36784e-01 3600 2022 2 2.64693e+01 4.78448e-01 3244 2022 3 2.65171e+01 6.81172e-01 3378 2022 4 2.65919e+01 7.74629e-01 1126 2022 5 2.72843e+01 7.28915e-01 2443 2022 6 2.79690e+01 8.29593e-01 2234 2022 7 2.79139e+01 5.04850e-01 2114 2022 8 2.85435e+01 7.61647e-01 2266 2022 9 2.91315e+01 8.71605e-01 1547 2022 10 2.91757e+01 6.64075e-01 2018 2022 11 2.79379e+01 6.51544e-01 2642 2022 12 2.71985e+01 5.41362e-01 3441 2023 1 2.65335e+01 5.50496e-01 3315 2023 2 2.59458e+01 4.06304e-01 2995 2023 3 2.64443e+01 4.99264e-01 3367 2023 4 2.71066e+01 7.54400e-01 3391 2023 5 2.83942e+01 7.69626e-01 2154 2023 6 2.87782e+01 5.82961e-01 1960 2023 7 2.85425e+01 6.76602e-01 1406 2023 8 2.93371e+01 5.29749e-01 1725 2023 9 3.00167e+01 8.28114e-01 2813 2023 10 3.02014e+01 7.92086e-01 2088 2023 11 2.87064e+01 6.29122e-01 2617 2023 12 2.80068e+01 5.41920e-01 3304 2024 1 2.72147e+01 5.01721e-01 3061 2024 2 2.70637e+01 4.86717e-01 2562 2024 3 2.74252e+01 6.87742e-01 3592 2024 4 2.74807e+01 6.07684e-01 384