YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.61101e+01 3.43358e-01 152 2000 3 2.57684e+01 6.38218e-01 495 2000 4 2.63860e+01 4.71512e-01 570 2000 5 2.77716e+01 6.15433e-01 669 2000 6 2.70183e+01 8.43298e-01 368 2000 7 2.77285e+01 8.65574e-01 692 2000 8 2.85944e+01 4.19052e-01 267 2000 9 2.90287e+01 6.29871e-01 699 2000 10 2.89977e+01 5.58612e-01 759 2000 11 2.83820e+01 7.89957e-01 1035 2000 12 2.69299e+01 5.77541e-01 667 2001 1 2.60477e+01 4.02613e-01 773 2001 2 2.59742e+01 4.02219e-01 550 2001 3 2.59951e+01 8.61605e-01 609 2001 4 2.67720e+01 1.22155e+00 721 2001 5 2.74434e+01 4.55435e-01 549 2001 6 2.78509e+01 6.71015e-01 320 2001 7 2.80227e+01 7.74819e-01 550 2001 8 2.84277e+01 5.65326e-01 772 2001 9 2.89057e+01 4.81238e-01 881 2001 10 2.88430e+01 3.83129e-01 535 2001 11 2.83951e+01 1.01547e+00 548 2001 12 2.72981e+01 7.12211e-01 802 2002 1 2.68301e+01 5.28075e-01 886 2002 2 2.63688e+01 4.79205e-01 750 2002 3 2.64060e+01 5.43875e-01 856 2002 4 2.71469e+01 3.14866e-01 512 2002 5 2.75350e+01 7.37010e-01 800 2002 6 2.79340e+01 3.93598e-01 332 2002 7 2.79972e+01 6.30046e-01 2261 2002 8 2.87840e+01 7.47649e-01 2081 2002 9 2.89400e+01 7.10568e-01 1777 2002 10 2.88042e+01 6.63097e-01 2934 2002 11 2.84857e+01 4.69140e-01 3933 2002 12 2.73993e+01 4.42905e-01 3425 2003 1 2.67490e+01 4.52860e-01 3501 2003 2 2.64216e+01 4.80677e-01 2840 2003 3 2.67256e+01 5.83752e-01 3063 2003 4 2.76580e+01 5.51300e-01 1706 2003 5 2.75210e+01 9.13283e-01 2397 2003 6 2.73258e+01 9.45366e-01 1018 2003 7 2.71909e+01 1.03429e+00 1477 2003 8 2.82496e+01 7.32706e-01 2423 2003 9 2.91561e+01 8.03198e-01 2143 2003 10 2.91803e+01 7.85286e-01 2720 2003 11 2.83506e+01 7.06349e-01 1767 2003 12 2.74210e+01 6.00160e-01 2455 2004 1 2.68852e+01 4.75706e-01 3128 2004 2 2.65153e+01 4.37428e-01 2896 2004 3 2.64628e+01 5.08413e-01 3455 2004 4 2.76853e+01 5.37000e-01 2806 2004 5 2.73005e+01 8.07257e-01 1713 2004 6 2.76927e+01 7.62480e-01 1471 2004 7 2.79407e+01 6.44207e-01 2005 2004 8 2.86278e+01 7.23786e-01 2125 2004 9 2.89916e+01 8.17350e-01 1377 2004 10 2.90847e+01 6.29677e-01 2406 2004 11 2.79639e+01 7.76193e-01 2168 2004 12 2.70468e+01 4.29611e-01 3455 2005 1 2.62993e+01 5.43489e-01 2721 2005 2 2.60092e+01 4.38127e-01 3103 2005 3 2.68330e+01 6.30983e-01 3817 2005 4 2.78126e+01 8.76588e-01 2372 2005 5 2.82856e+01 1.21846e+00 1598 2005 6 2.88124e+01 8.83281e-01 1672 2005 7 2.87933e+01 7.96562e-01 1799 2005 8 2.92284e+01 8.59049e-01 1544 2005 9 2.97166e+01 8.62015e-01 2145 2005 10 2.89743e+01 9.34576e-01 1276 2005 11 2.83709e+01 6.36593e-01 2634 2005 12 2.75532e+01 5.32219e-01 3299 2006 1 2.64901e+01 5.25022e-01 2445 2006 2 2.63157e+01 4.59817e-01 3163 2006 3 2.65668e+01 4.54252e-01 3591 2006 4 2.76375e+01 6.63242e-01 2632 2006 5 2.83998e+01 9.32398e-01 1881 2006 6 2.86073e+01 8.04430e-01 1562 2006 7 2.81403e+01 8.60826e-01 1899 2006 8 2.83302e+01 6.77860e-01 1995 2006 9 2.93446e+01 8.46784e-01 2656 2006 10 2.95020e+01 6.22322e-01 1954 2006 11 2.87522e+01 4.97339e-01 3128 2006 12 2.76180e+01 6.99676e-01 3559 2007 1 2.67631e+01 3.36015e-01 3393 2007 2 2.65967e+01 4.78102e-01 3123 2007 3 2.68257e+01 5.55013e-01 2530 2007 4 2.76024e+01 6.46046e-01 2686 2007 5 2.87755e+01 9.44067e-01 1760 2007 6 2.84406e+01 6.72155e-01 1672 2007 7 2.80663e+01 7.16256e-01 1295 2007 8 2.84972e+01 7.68945e-01 1792 2007 9 2.90748e+01 8.35800e-01 2599 2007 10 2.91758e+01 7.87391e-01 1558 2007 11 2.79391e+01 7.16860e-01 2352 2007 12 2.72467e+01 3.85288e-01 3249 2008 1 2.66466e+01 4.87316e-01 3352 2008 2 2.59347e+01 4.72365e-01 3327 2008 3 2.60246e+01 6.50741e-01 3076 2008 4 2.64821e+01 7.54080e-01 2779 2008 5 2.76802e+01 8.07928e-01 2455 2008 6 2.81282e+01 7.11654e-01 1717 2008 7 2.79709e+01 7.11925e-01 2524 2008 8 2.88645e+01 4.54476e-01 2273 2008 9 2.87985e+01 9.43177e-01 1381 2008 10 2.86940e+01 6.64675e-01 2985 2008 11 2.85074e+01 5.81701e-01 1829 2008 12 2.68664e+01 4.83934e-01 3394 2009 1 2.60817e+01 5.97211e-01 3331 2009 2 2.61631e+01 4.08121e-01 2565 2009 3 2.59721e+01 5.58343e-01 2181 2009 4 2.66461e+01 6.24264e-01 2955 2009 5 2.74047e+01 1.06111e+00 1644 2009 6 2.78756e+01 9.05215e-01 1483 2009 7 2.83754e+01 7.77309e-01 1857 2009 8 2.84577e+01 6.61248e-01 2665 2009 9 2.91309e+01 7.26254e-01 2485 2009 10 2.91278e+01 5.73888e-01 3050 2009 11 2.87157e+01 5.28539e-01 3239 2009 12 2.77440e+01 7.04603e-01 3050 2010 1 2.70760e+01 4.99065e-01 2565 2010 2 2.70543e+01 6.89119e-01 2522 2010 3 2.79153e+01 7.85586e-01 2810 2010 4 2.77368e+01 6.02049e-01 2510 2010 5 2.86678e+01 5.32582e-01 2177 2010 6 2.87897e+01 6.43797e-01 1835 2010 7 2.85822e+01 5.94737e-01 1579 2010 8 2.94266e+01 7.39620e-01 2318 2010 9 2.95296e+01 5.80687e-01 1888 2010 10 2.92700e+01 6.56026e-01 2608 2010 11 2.76384e+01 5.42558e-01 1743 2010 12 2.72745e+01 6.42244e-01 1910 2011 1 2.62474e+01 4.81581e-01 2877 2011 2 2.61500e+01 4.57013e-01 2885 2011 3 2.63544e+01 5.06631e-01 3201 2011 4 2.70881e+01 7.53986e-01 3147 2011 5 2.78045e+01 9.58931e-01 1271 2011 6 2.88955e+01 5.49500e-01 1316 2011 7 2.85560e+01 7.12518e-01 1797 2011 8 2.86139e+01 7.09844e-01 2002 2011 9 2.91650e+01 8.97138e-01 1841 2011 10 2.91284e+01 5.51588e-01 2788 2011 11 2.84706e+01 6.41145e-01 2474 2011 12 2.77638e+01 8.29966e-01 2955 2012 1 2.67364e+01 4.36031e-01 3581 2012 2 2.63338e+01 4.05846e-01 3378 2012 3 2.61685e+01 5.96791e-01 3059 2012 4 2.71761e+01 1.03716e+00 2330 2012 5 2.74494e+01 8.65805e-01 1860 2012 6 2.80295e+01 8.62479e-01 1930 2012 7 2.81658e+01 7.29894e-01 2010 2012 8 2.82870e+01 6.42836e-01 1725 2012 9 2.91778e+01 7.37527e-01 2705 2012 10 2.93973e+01 6.56718e-01 1653 2012 11 2.89506e+01 5.28336e-01 3303 2012 12 2.77062e+01 6.39129e-01 2852 2013 1 2.66689e+01 4.45853e-01 3054 2013 2 2.61172e+01 3.25600e-01 2988 2013 3 2.66501e+01 9.75489e-01 2799 2013 4 2.73706e+01 5.96928e-01 3325 2013 5 2.83310e+01 7.03938e-01 2343 2013 6 2.72238e+01 9.56468e-01 973 2013 7 2.83713e+01 6.53337e-01 2754 2013 8 2.85858e+01 6.24301e-01 1988 2013 9 2.92934e+01 7.49132e-01 1733 2013 10 2.93949e+01 7.57922e-01 1931 2013 11 2.84615e+01 5.36665e-01 2687 2013 12 2.72907e+01 6.65390e-01 2869 2014 1 2.63793e+01 3.90963e-01 3531 2014 2 2.63168e+01 5.40018e-01 3759 2014 3 2.68232e+01 6.03329e-01 3823 2014 4 2.71617e+01 6.78968e-01 2598 2014 5 2.76772e+01 7.57011e-01 2370 2014 6 2.75398e+01 1.32221e+00 1518 2014 7 2.80066e+01 7.06317e-01 1883 2014 8 2.83917e+01 7.50933e-01 1673 2014 9 2.85967e+01 9.14008e-01 1872 2014 10 2.92905e+01 7.71450e-01 3066 2014 11 2.85820e+01 6.31076e-01 2692 2014 12 2.75233e+01 6.96325e-01 3457 2015 1 2.68054e+01 4.78363e-01 3145 2015 2 2.69177e+01 4.73918e-01 2785 2015 3 2.66887e+01 5.12689e-01 3204 2015 4 2.69069e+01 6.37163e-01 3205 2015 5 2.73532e+01 8.54816e-01 2099 2015 6 2.80104e+01 7.49336e-01 1333 2015 7 2.75400e+01 7.29501e-01 2079 2015 8 2.84261e+01 7.02579e-01 2695 2015 9 2.91717e+01 7.89731e-01 2778 2015 10 2.97182e+01 5.65386e-01 2564 2015 11 2.84400e+01 7.34597e-01 2214 2015 12 2.74705e+01 6.15159e-01 2519 2016 1 2.67132e+01 6.12580e-01 2742 2016 2 2.68172e+01 5.00044e-01 2681 2016 3 2.68739e+01 5.80754e-01 2893 2016 4 2.76001e+01 6.16450e-01 2374 2016 5 2.79520e+01 7.26681e-01 1240 2016 6 2.83539e+01 5.66733e-01 1625 2016 7 2.84863e+01 6.00978e-01 2236 2016 8 2.87849e+01 4.81564e-01 2035 2016 9 2.95230e+01 6.33933e-01 2934 2016 10 2.90259e+01 8.98852e-01 1729 2016 11 2.86784e+01 8.15630e-01 1298 2016 12 2.75839e+01 7.85225e-01 3078 2017 1 2.68628e+01 4.37076e-01 2809 2017 2 2.66665e+01 5.83611e-01 3253 2017 3 2.68612e+01 5.23144e-01 2267 2017 4 2.76407e+01 6.59055e-01 2581 2017 5 2.79539e+01 7.32352e-01 2322 2017 6 2.83397e+01 7.55178e-01 2189 2017 7 2.87090e+01 7.04971e-01 2169 2017 8 2.88766e+01 6.84009e-01 2450 2017 9 2.92579e+01 8.51149e-01 1126 2017 10 2.86579e+01 6.46219e-01 1929 2017 11 2.83642e+01 5.75342e-01 2119 2017 12 2.78520e+01 4.99765e-01 3564 2018 1 2.67787e+01 5.45672e-01 2235 2018 2 2.62644e+01 3.86142e-01 2592 2018 3 2.66952e+01 7.49837e-01 2844 2018 4 2.74694e+01 4.49327e-01 2683 2018 5 2.74394e+01 6.04786e-01 2918 2018 6 2.79940e+01 7.28833e-01 1414 2018 7 2.77514e+01 6.28307e-01 1182 2018 8 2.83091e+01 6.49312e-01 2743 2018 9 2.90203e+01 5.40418e-01 2544 2018 10 2.86411e+01 7.90333e-01 2119 2018 11 2.82802e+01 6.35058e-01 2916 2018 12 2.72526e+01 5.59234e-01 3530 2019 1 2.63884e+01 4.05183e-01 2626 2019 2 2.63379e+01 3.73589e-01 2359 2019 3 2.65292e+01 4.94540e-01 3251 2019 4 2.71829e+01 4.45000e-01 3161 2019 5 2.76279e+01 9.24122e-01 1375 2019 6 2.82012e+01 7.10143e-01 2825 2019 7 2.83485e+01 6.77905e-01 2357 2019 8 2.88260e+01 6.95185e-01 2421 2019 9 2.91250e+01 8.67431e-01 1825 2019 10 2.94679e+01 6.15288e-01 2922 2019 11 2.89764e+01 4.50506e-01 3617 2019 12 2.83034e+01 8.20116e-01 3119 2020 1 2.71779e+01 5.67028e-01 2605 2020 2 2.68493e+01 4.26938e-01 3523 2020 3 2.71512e+01 6.07278e-01 2939 2020 4 2.79591e+01 6.38862e-01 3285 2020 5 2.82792e+01 8.52935e-01 1869 2020 6 2.90884e+01 6.22102e-01 2324 2020 7 2.86312e+01 7.89942e-01 1782 2020 8 2.91865e+01 6.51413e-01 1977 2020 9 2.96962e+01 7.30125e-01 2151 2020 10 2.92572e+01 5.65842e-01 2321 2020 11 2.80029e+01 7.91793e-01 1915 2020 12 2.76397e+01 3.62854e-01 3317 2021 1 2.69480e+01 4.61389e-01 2913 2021 2 2.65011e+01 4.46118e-01 3239 2021 3 2.67351e+01 3.92070e-01 3895 2021 4 2.72304e+01 7.70226e-01 2563 2021 5 2.75863e+01 7.08091e-01 2573 2021 6 2.79435e+01 6.34838e-01 1575 2021 7 2.78486e+01 6.75478e-01 2236 2021 8 2.85652e+01 5.97649e-01 2012 2021 9 2.95437e+01 7.00066e-01 3109 2021 10 2.93752e+01 7.02418e-01 2353 2021 11 2.86467e+01 5.71762e-01 2880 2021 12 2.76235e+01 5.83323e-01 3236 2022 1 2.68301e+01 3.93554e-01 3680 2022 2 2.66787e+01 4.09097e-01 3077 2022 3 2.66756e+01 6.21481e-01 3330 2022 4 2.70018e+01 7.82735e-01 944 2022 5 2.74823e+01 7.89613e-01 2504 2022 6 2.83543e+01 6.81300e-01 2127 2022 7 2.79453e+01 7.59513e-01 2119 2022 8 2.86548e+01 7.23966e-01 2476 2022 9 2.92585e+01 1.03446e+00 1912 2022 10 2.92708e+01 6.23648e-01 1881 2022 11 2.79567e+01 6.97197e-01 2929 2022 12 2.72689e+01 4.13386e-01 3554 2023 1 2.66426e+01 6.92608e-01 3327 2023 2 2.60020e+01 4.09382e-01 3003 2023 3 2.65339e+01 4.71202e-01 3160 2023 4 2.71459e+01 7.54820e-01 3187 2023 5 2.88107e+01 7.36538e-01 2698 2023 6 2.90365e+01 6.15129e-01 2359 2023 7 2.87751e+01 6.43204e-01 1487 2023 8 2.95570e+01 7.60931e-01 1737 2023 9 3.00842e+01 8.35477e-01 2701 2023 10 3.02197e+01 7.42661e-01 2183 2023 11 2.88246e+01 7.09714e-01 2764 2023 12 2.80932e+01 5.93769e-01 3066 2024 1 2.73656e+01 5.73003e-01 3501 2024 2 2.70945e+01 5.27413e-01 2434 2024 3 2.75318e+01 5.07800e-01 3606 2024 4 2.82195e+01 6.01838e-01 2148 2024 5 2.90711e+01 8.36884e-01 2553 2024 6 2.95837e+01 7.19977e-01 1343 2024 7 2.92169e+01 8.76086e-01 1448 2024 8 2.96858e+01 5.74943e-01 2282 2024 9 3.00315e+01 8.81126e-01 2124 2024 10 3.04180e+01 5.84686e-01 2571 2024 11 2.88014e+01 1.12571e+00 355