YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.39185e+01 4.41694e-01 82 2000 3 2.48080e+01 1.16992e+00 716 2000 4 2.49557e+01 8.06354e-01 749 2000 5 2.71733e+01 1.13860e+00 631 2000 6 2.81805e+01 6.85042e-01 365 2000 7 2.92366e+01 1.73906e+00 658 2000 8 2.92335e+01 1.25136e+00 323 2000 9 2.91754e+01 8.92978e-01 486 2000 10 2.79985e+01 1.17364e+00 901 2000 11 2.65692e+01 6.60538e-01 624 2000 12 2.49546e+01 5.02352e-01 534 2001 1 2.35787e+01 8.69718e-01 654 2001 2 2.36598e+01 7.66861e-01 692 2001 3 2.38624e+01 8.69586e-01 816 2001 4 2.57505e+01 7.76285e-01 546 2001 5 2.55519e+01 8.01158e-01 325 2001 6 2.74361e+01 5.69559e-01 192 2001 7 2.81481e+01 1.05634e+00 656 2001 8 2.79593e+01 2.25892e+00 296 2001 9 2.79029e+01 1.12496e+00 286 2001 10 2.78004e+01 3.06878e-01 514 2001 11 2.65937e+01 4.95547e-01 514 2001 12 2.55481e+01 8.27876e-01 611 2002 1 2.39712e+01 7.74667e-01 751 2002 2 2.31914e+01 1.00381e+00 364 2002 3 2.47052e+01 1.15157e+00 582 2002 4 2.65784e+01 5.53560e-01 896 2002 5 2.66217e+01 1.27628e+00 864 2002 6 2.79903e+01 9.64200e-01 282 2002 7 2.87451e+01 9.78257e-01 2291 2002 8 2.95058e+01 7.97848e-01 1748 2002 9 2.85800e+01 8.25881e-01 1186 2002 10 2.82239e+01 6.42385e-01 3340 2002 11 2.70297e+01 1.32883e+00 2229 2002 12 2.44622e+01 8.25814e-01 1990 2003 1 2.40953e+01 1.28725e+00 2118 2003 2 2.21992e+01 7.94574e-01 3035 2003 3 2.59440e+01 8.14981e-01 2584 2003 4 2.54691e+01 7.22282e-01 2655 2003 5 2.69723e+01 1.15369e+00 3143 2003 6 2.88921e+01 1.14993e+00 1698 2003 7 2.87153e+01 9.46342e-01 2090 2003 8 2.97486e+01 7.99801e-01 1937 2003 9 2.95248e+01 9.77976e-01 2127 2003 10 2.84727e+01 9.91008e-01 2836 2003 11 2.67669e+01 6.13451e-01 2107 2003 12 2.46739e+01 1.32340e+00 1370 2004 1 2.48171e+01 8.78534e-01 2809 2004 2 2.35839e+01 8.01664e-01 2330 2004 3 2.43432e+01 9.47109e-01 2662 2004 4 2.40288e+01 7.56498e-01 2778 2004 5 2.58151e+01 8.52237e-01 2642 2004 6 2.84837e+01 9.99884e-01 2655 2004 7 2.91672e+01 1.08743e+00 2438 2004 8 2.98539e+01 1.20952e+00 2022 2004 9 2.90187e+01 9.98417e-01 2122 2004 10 2.78778e+01 7.33324e-01 2898 2004 11 2.65740e+01 5.66917e-01 3048 2004 12 2.51148e+01 1.34282e+00 2004 2005 1 2.34334e+01 9.65528e-01 2759 2005 2 2.39059e+01 1.06381e+00 1780 2005 3 2.34874e+01 7.82637e-01 2378 2005 4 2.46632e+01 1.16426e+00 2738 2005 5 2.62719e+01 1.34956e+00 2805 2005 6 2.76112e+01 1.03517e+00 1491 2005 7 2.91523e+01 1.18452e+00 2366 2005 8 3.01040e+01 9.41799e-01 2550 2005 9 2.86744e+01 1.44331e+00 2540 2005 10 2.77232e+01 6.76497e-01 1606 2005 11 2.57169e+01 7.14831e-01 2410 2005 12 2.46798e+01 8.77594e-01 2702 2006 1 2.34560e+01 9.24187e-01 2603 2006 2 2.38862e+01 1.13369e+00 2712 2006 3 2.50420e+01 6.30608e-01 2882 2006 4 2.54090e+01 9.54512e-01 3787 2006 5 2.65685e+01 9.85628e-01 2753 2006 6 2.83502e+01 1.11126e+00 2608 2006 7 2.88125e+01 1.07809e+00 1566 2006 8 2.94894e+01 7.45369e-01 2319 2006 9 3.01518e+01 7.84778e-01 2077 2006 10 2.84729e+01 7.54181e-01 2174 2006 11 2.62212e+01 9.87770e-01 1699 2006 12 2.48815e+01 9.67969e-01 1066 2007 1 2.47549e+01 6.55954e-01 2092 2007 2 2.44572e+01 7.52340e-01 1485 2007 3 2.47424e+01 8.49964e-01 2567 2007 4 2.46464e+01 1.31767e+00 3005 2007 5 2.67140e+01 7.20206e-01 3240 2007 6 2.80729e+01 1.16866e+00 2193 2007 7 3.02014e+01 9.52831e-01 2716 2007 8 2.96932e+01 7.71938e-01 2517 2007 9 2.97534e+01 1.05765e+00 1679 2007 10 2.82418e+01 1.04205e+00 1496 2007 11 2.66878e+01 8.03705e-01 2343 2007 12 2.58265e+01 7.30684e-01 2719 2008 1 2.38642e+01 8.42173e-01 2010 2008 2 2.41098e+01 1.13997e+00 2847 2008 3 2.43142e+01 1.12503e+00 2318 2008 4 2.50523e+01 6.90495e-01 3278 2008 5 2.68338e+01 1.15993e+00 3648 2008 6 2.78659e+01 9.48556e-01 2343 2008 7 2.87668e+01 1.24702e+00 2422 2008 8 2.98602e+01 8.75218e-01 2456 2008 9 2.81922e+01 8.33326e-01 1747 2008 10 2.77334e+01 1.02930e+00 1577 2008 11 2.58956e+01 6.77451e-01 2575 2008 12 2.40531e+01 7.20263e-01 2704 2009 1 2.32464e+01 1.26830e+00 2422 2009 2 2.35068e+01 7.14805e-01 2542 2009 3 2.44235e+01 8.92163e-01 2125 2009 4 2.47855e+01 8.19118e-01 3174 2009 5 2.65037e+01 1.27118e+00 3439 2009 6 2.88994e+01 1.20341e+00 2166 2009 7 2.93647e+01 9.75874e-01 2728 2009 8 2.97206e+01 1.02467e+00 3224 2009 9 3.00798e+01 9.46345e-01 1899 2009 10 2.92420e+01 1.13809e+00 2874 2009 11 2.69810e+01 9.28657e-01 1662 2009 12 2.52326e+01 1.06537e+00 2096 2010 1 2.40761e+01 1.42985e+00 1847 2010 2 2.30046e+01 9.76805e-01 1190 2010 3 2.37554e+01 8.83124e-01 1971 2010 4 2.47473e+01 1.37097e+00 2438 2010 5 2.69441e+01 1.25515e+00 3316 2010 6 2.95977e+01 1.02961e+00 2656 2010 7 2.91550e+01 1.10821e+00 1928 2010 8 3.01636e+01 1.12922e+00 2194 2010 9 2.97961e+01 7.95010e-01 1849 2010 10 2.79454e+01 8.97994e-01 2876 2010 11 2.63755e+01 7.76323e-01 2335 2010 12 2.36801e+01 1.25901e+00 2765 2011 1 2.25076e+01 9.49373e-01 2356 2011 2 2.17605e+01 9.71439e-01 3054 2011 3 2.45931e+01 1.25055e+00 2992 2011 4 2.59124e+01 7.34926e-01 3749 2011 5 2.71638e+01 7.89784e-01 3364 2011 6 2.86243e+01 1.25870e+00 1982 2011 7 2.96171e+01 1.09843e+00 2421 2011 8 3.01499e+01 1.36023e+00 2152 2011 9 2.98487e+01 9.75042e-01 2538 2011 10 2.82655e+01 1.01145e+00 1094 2011 11 2.56075e+01 6.30243e-01 2788 2011 12 2.47562e+01 7.46573e-01 2309 2012 1 2.41309e+01 1.17299e+00 2809 2012 2 2.40451e+01 7.65177e-01 1904 2012 3 2.48754e+01 7.19383e-01 3047 2012 4 2.57849e+01 7.74685e-01 2498 2012 5 2.68720e+01 1.34793e+00 2138 2012 6 2.81917e+01 8.12179e-01 1604 2012 7 2.86826e+01 7.99925e-01 2451 2012 8 2.94737e+01 1.26284e+00 2408 2012 9 2.92264e+01 1.18142e+00 1834 2012 10 2.81278e+01 8.61692e-01 2172 2012 11 2.67099e+01 9.01451e-01 2855 2012 12 2.55494e+01 8.04692e-01 2402 2013 1 2.44093e+01 6.52179e-01 2377 2013 2 2.44047e+01 8.54295e-01 2338 2013 3 2.32867e+01 7.27814e-01 2600 2013 4 2.55442e+01 1.54071e+00 2519 2013 5 2.62509e+01 9.67982e-01 2832 2013 6 2.79036e+01 1.03678e+00 2199 2013 7 2.92522e+01 1.24329e+00 1964 2013 8 2.94881e+01 1.23173e+00 1475 2013 9 2.94808e+01 8.84880e-01 1646 2013 10 2.82812e+01 9.38116e-01 2509 2013 11 2.70199e+01 8.23243e-01 2060 2013 12 2.55580e+01 9.08564e-01 2030 2014 1 2.43892e+01 9.12597e-01 1877 2014 2 2.46301e+01 7.05690e-01 3110 2014 3 2.45069e+01 7.84826e-01 2896 2014 4 2.58240e+01 7.54943e-01 2791 2014 5 2.67942e+01 6.61725e-01 2354 2014 6 2.86961e+01 1.12170e+00 2039 2014 7 3.00317e+01 1.18412e+00 2640 2014 8 3.04978e+01 8.54412e-01 2844 2014 9 2.98752e+01 1.01183e+00 1619 2014 10 2.84786e+01 1.10230e+00 2239 2014 11 2.66334e+01 9.26252e-01 2405 2014 12 2.52820e+01 8.16023e-01 2236 2015 1 2.52572e+01 9.33223e-01 1874 2015 2 2.32963e+01 1.01538e+00 2563 2015 3 2.46761e+01 1.16506e+00 3268 2015 4 2.57801e+01 1.21487e+00 2840 2015 5 2.70267e+01 9.78692e-01 3168 2015 6 2.87433e+01 1.18490e+00 2024 2015 7 2.95880e+01 1.27456e+00 2610 2015 8 3.01443e+01 1.11229e+00 2623 2015 9 3.04925e+01 1.11536e+00 1771 2015 10 2.86458e+01 6.51149e-01 2203 2015 11 2.78851e+01 7.10651e-01 2556 2015 12 2.59637e+01 8.30893e-01 1917 2016 1 2.60521e+01 1.39663e+00 743 2016 2 2.42070e+01 1.19300e+00 1891 2016 3 2.45809e+01 1.38459e+00 1780 2016 4 2.56539e+01 9.10483e-01 3051 2016 5 2.73543e+01 1.20481e+00 3422 2016 6 2.86925e+01 8.69856e-01 2312 2016 7 2.94353e+01 7.64721e-01 2704 2016 8 2.95157e+01 7.87672e-01 1883 2016 9 2.95220e+01 8.65853e-01 2462 2016 10 2.88290e+01 9.23930e-01 2287 2016 11 2.69814e+01 1.06814e+00 2632 2016 12 2.56511e+01 8.93555e-01 2493 2017 1 2.44602e+01 8.84883e-01 2940 2017 2 2.44655e+01 9.38482e-01 3163 2017 3 2.46794e+01 1.07941e+00 3106 2017 4 2.54526e+01 7.60561e-01 2392 2017 5 2.68871e+01 9.80495e-01 3255 2017 6 2.83708e+01 1.42816e+00 1934 2017 7 2.93913e+01 1.04923e+00 2436 2017 8 2.98551e+01 1.01230e+00 2235 2017 9 2.97069e+01 6.54576e-01 2113 2017 10 2.85570e+01 6.66700e-01 1444 2017 11 2.67288e+01 7.92632e-01 3566 2017 12 2.58196e+01 8.52579e-01 3683 2018 1 2.38460e+01 9.99620e-01 1372 2018 2 2.44945e+01 9.92744e-01 2817 2018 3 2.54355e+01 1.02368e+00 2955 2018 4 2.55168e+01 7.71295e-01 3290 2018 5 2.55531e+01 6.06559e-01 1287 2018 6 2.87585e+01 1.29561e+00 1960 2018 7 3.00885e+01 1.19131e+00 2242 2018 8 2.98998e+01 9.00039e-01 2617 2018 9 2.94382e+01 6.62645e-01 2423 2018 10 2.81265e+01 7.82478e-01 2862 2018 11 2.74082e+01 7.74747e-01 2070 2018 12 2.56506e+01 1.12379e+00 2603 2019 1 2.41903e+01 9.22716e-01 2540 2019 2 2.54520e+01 8.95927e-01 2879 2019 3 2.55345e+01 8.68206e-01 3451 2019 4 2.56486e+01 8.58022e-01 3203 2019 5 2.75163e+01 9.69831e-01 3450 2019 6 2.95138e+01 1.19094e+00 2878 2019 7 2.97568e+01 1.10535e+00 2484 2019 8 3.05469e+01 1.02282e+00 2115 2019 9 2.93296e+01 9.23395e-01 2380 2019 10 2.86299e+01 9.08733e-01 2632 2019 11 2.74759e+01 1.13427e+00 2605 2019 12 2.54868e+01 1.02794e+00 1954 2020 1 2.51326e+01 9.43901e-01 2359 2020 2 2.50368e+01 1.04575e+00 2155 2020 3 2.49545e+01 8.14430e-01 3777 2020 4 2.73528e+01 8.35438e-01 3444 2020 5 2.68940e+01 1.16151e+00 2431 2020 6 2.89913e+01 9.77307e-01 1927 2020 7 2.98932e+01 1.15176e+00 1962 2020 8 3.01164e+01 9.56675e-01 2648 2020 9 2.98832e+01 7.77674e-01 2516 2020 10 2.84645e+01 9.73801e-01 1676 2020 11 2.67784e+01 1.00822e+00 1698 2020 12 2.52436e+01 1.00678e+00 2580 2021 1 2.39251e+01 1.12495e+00 2042 2021 2 2.43879e+01 1.06926e+00 3030 2021 3 2.45728e+01 7.45936e-01 3479 2021 4 2.58300e+01 6.92337e-01 2947 2021 5 2.69622e+01 9.38201e-01 2708 2021 6 2.79892e+01 1.05542e+00 1427 2021 7 2.92557e+01 9.48640e-01 3009 2021 8 2.98362e+01 1.27322e+00 2533 2021 9 2.99589e+01 8.52546e-01 2876 2021 10 2.90232e+01 8.92856e-01 2106 2021 11 2.68062e+01 9.12937e-01 1871 2021 12 2.57263e+01 8.71311e-01 3661 2022 1 2.55444e+01 7.49245e-01 2121 2022 2 2.43341e+01 9.08692e-01 2687 2022 3 2.54572e+01 9.50301e-01 2941 2022 4 2.53982e+01 7.82486e-01 1738 2022 5 2.72579e+01 1.04428e+00 2988 2022 6 2.89317e+01 1.20561e+00 2253 2022 7 2.98276e+01 6.98537e-01 2779 2022 8 3.01888e+01 9.29551e-01 2489 2022 9 3.08875e+01 8.65543e-01 2166 2022 10 2.80905e+01 7.79761e-01 2346 2022 11 2.73045e+01 5.78929e-01 2349 2022 12 2.61940e+01 6.13662e-01 2644 2023 1 2.53703e+01 7.29001e-01 2904 2023 2 2.52264e+01 8.90176e-01 2973 2023 3 2.55861e+01 8.46882e-01 3213 2023 4 2.65642e+01 8.32414e-01 2900 2023 5 2.78361e+01 1.19159e+00 3392 2023 6 2.91323e+01 1.12963e+00 2842 2023 7 3.07169e+01 9.85010e-01 2604 2023 8 3.11205e+01 9.95675e-01 1961 2023 9 3.06405e+01 8.66500e-01 2534 2023 10 2.91726e+01 9.56918e-01 2416 2023 11 2.73502e+01 1.02923e+00 1813 2023 12 2.64080e+01 1.25929e+00 1271 2024 1 2.50203e+01 1.02410e+00 1830 2024 2 2.40242e+01 8.51583e-01 2367 2024 3 2.53762e+01 1.04197e+00 2390 2024 4 2.37778e+01 8.15800e-01 364