YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.23384e+01 5.32490e-01 192 2000 3 2.41881e+01 4.90045e-01 512 2000 4 2.36496e+01 1.30537e+00 539 2000 5 2.62040e+01 1.64251e+00 674 2000 6 2.83781e+01 4.97561e-01 405 2000 7 2.98081e+01 1.81621e+00 385 2000 8 3.01228e+01 2.98610e-01 128 2000 9 2.91492e+01 1.04919e+00 558 2000 10 2.71376e+01 1.40255e+00 537 2000 11 2.56559e+01 7.44912e-01 636 2000 12 2.41366e+01 4.53898e-01 560 2001 1 2.14125e+01 1.05498e+00 523 2001 2 2.23144e+01 6.99570e-01 384 2001 3 2.15861e+01 7.51788e-01 458 2001 4 2.48330e+01 1.43001e+00 608 2001 5 2.50336e+01 8.13575e-01 440 2001 6 2.74841e+01 1.10379e+00 320 2001 7 2.85186e+01 4.52515e-01 469 2001 8 2.96413e+01 3.90607e-01 274 2001 9 2.85085e+01 6.27810e-01 425 2001 10 2.72671e+01 6.33964e-01 225 2001 11 2.53079e+01 4.96985e-01 668 2001 12 2.40922e+01 1.69185e+00 673 2002 1 2.25924e+01 8.88431e-01 512 2002 2 2.23425e+01 7.28312e-01 398 2002 3 2.19033e+01 6.72104e-01 401 2002 4 2.62085e+01 3.72298e-01 640 2002 5 2.68215e+01 5.15776e-01 704 2002 6 2.77736e+01 7.89285e-01 206 2002 7 2.92168e+01 9.26827e-01 1896 2002 8 2.96297e+01 7.06960e-01 1290 2002 9 2.88616e+01 1.16711e+00 872 2002 10 2.83139e+01 6.74967e-01 2855 2002 11 2.67676e+01 1.43125e+00 2112 2002 12 2.35657e+01 9.39141e-01 1649 2003 1 2.14132e+01 9.87110e-01 1730 2003 2 1.97506e+01 1.01142e+00 2122 2003 3 2.44382e+01 7.58379e-01 2069 2003 4 2.39808e+01 6.09564e-01 2351 2003 5 2.71753e+01 1.01288e+00 3318 2003 6 2.88764e+01 8.66596e-01 1555 2003 7 2.91501e+01 9.48458e-01 1589 2003 8 2.97273e+01 7.92354e-01 1773 2003 9 2.92228e+01 8.78550e-01 1664 2003 10 2.77273e+01 1.26344e+00 2510 2003 11 2.50843e+01 7.87818e-01 2728 2003 12 2.20179e+01 9.09696e-01 1934 2004 1 2.31064e+01 6.53082e-01 2503 2004 2 2.27094e+01 7.42922e-01 1929 2004 3 2.33645e+01 7.32113e-01 2506 2004 4 2.32738e+01 9.45349e-01 2688 2004 5 2.54245e+01 1.11252e+00 2873 2004 6 2.86012e+01 9.98640e-01 2575 2004 7 2.95184e+01 1.00289e+00 1867 2004 8 2.99055e+01 9.34286e-01 2199 2004 9 2.91468e+01 9.22487e-01 1893 2004 10 2.78682e+01 1.13073e+00 2651 2004 11 2.58751e+01 6.51268e-01 3132 2004 12 2.35868e+01 1.68021e+00 2137 2005 1 2.24379e+01 1.02452e+00 2919 2005 2 2.14345e+01 1.11066e+00 2477 2005 3 2.27623e+01 9.83347e-01 1731 2005 4 2.33193e+01 6.80660e-01 2587 2005 5 2.54646e+01 1.46933e+00 2783 2005 6 2.76299e+01 1.08878e+00 1322 2005 7 2.85780e+01 1.35710e+00 1691 2005 8 2.98902e+01 1.30299e+00 1937 2005 9 2.88592e+01 9.36759e-01 2240 2005 10 2.75770e+01 8.92558e-01 1539 2005 11 2.48896e+01 7.77296e-01 2307 2005 12 2.37433e+01 1.04056e+00 2044 2006 1 2.20385e+01 8.72188e-01 2835 2006 2 2.09958e+01 6.14226e-01 2889 2006 3 2.30139e+01 1.12236e+00 3268 2006 4 2.50407e+01 1.16414e+00 3305 2006 5 2.66643e+01 8.86391e-01 2343 2006 6 2.80636e+01 1.09961e+00 2482 2006 7 2.86583e+01 7.34485e-01 1235 2006 8 2.96975e+01 8.87019e-01 1818 2006 9 3.00329e+01 8.95110e-01 2643 2006 10 2.85927e+01 1.05807e+00 2433 2006 11 2.49639e+01 1.04789e+00 1705 2006 12 2.37449e+01 6.25589e-01 1345 2007 1 2.38846e+01 7.73822e-01 2368 2007 2 2.27522e+01 7.30280e-01 1695 2007 3 2.29894e+01 8.42402e-01 2996 2007 4 2.42809e+01 9.53857e-01 2759 2007 5 2.62757e+01 8.71734e-01 2635 2007 6 2.74013e+01 1.31458e+00 2302 2007 7 3.00791e+01 9.86864e-01 2642 2007 8 2.98744e+01 8.49710e-01 2137 2007 9 2.93702e+01 9.17932e-01 1203 2007 10 2.80943e+01 7.44097e-01 1356 2007 11 2.54934e+01 8.10220e-01 2551 2007 12 2.45382e+01 5.30374e-01 2779 2008 1 2.27929e+01 7.01543e-01 2271 2008 2 2.28429e+01 8.48076e-01 2195 2008 3 2.24762e+01 1.08295e+00 2305 2008 4 2.48918e+01 6.47819e-01 3698 2008 5 2.66715e+01 1.09802e+00 3210 2008 6 2.81325e+01 9.22180e-01 2193 2008 7 2.93880e+01 1.48294e+00 1825 2008 8 2.98648e+01 8.75031e-01 2592 2008 9 2.88197e+01 7.24026e-01 1372 2008 10 2.77224e+01 9.78416e-01 1837 2008 11 2.45539e+01 8.87210e-01 2850 2008 12 2.29423e+01 6.01741e-01 2698 2009 1 2.15142e+01 1.12069e+00 2423 2009 2 2.07677e+01 1.19963e+00 2932 2009 3 2.21142e+01 1.23598e+00 2725 2009 4 2.48768e+01 7.33347e-01 2665 2009 5 2.60964e+01 1.03860e+00 2594 2009 6 2.85757e+01 1.15245e+00 2484 2009 7 2.92597e+01 9.96352e-01 1877 2009 8 2.98361e+01 8.04564e-01 2600 2009 9 3.01621e+01 9.31028e-01 1985 2009 10 2.92791e+01 1.46789e+00 2702 2009 11 2.63580e+01 8.55475e-01 1458 2009 12 2.48083e+01 9.39590e-01 1826 2010 1 2.21187e+01 1.30500e+00 1649 2010 2 2.11304e+01 9.67273e-01 1033 2010 3 2.09264e+01 8.24955e-01 2144 2010 4 2.30895e+01 1.49925e+00 2379 2010 5 2.67605e+01 1.20918e+00 3028 2010 6 2.95443e+01 1.19430e+00 2596 2010 7 2.92697e+01 1.08065e+00 2143 2010 8 2.97480e+01 1.25465e+00 1776 2010 9 2.98047e+01 7.69494e-01 1872 2010 10 2.75855e+01 1.05261e+00 3055 2010 11 2.54272e+01 1.08726e+00 2457 2010 12 2.23579e+01 1.44012e+00 2476 2011 1 2.03890e+01 7.54762e-01 2234 2011 2 1.96674e+01 9.94345e-01 2770 2011 3 2.31388e+01 1.55521e+00 3585 2011 4 2.54431e+01 8.28932e-01 3543 2011 5 2.71227e+01 6.24849e-01 3239 2011 6 2.85665e+01 9.79714e-01 1925 2011 7 2.95004e+01 1.12490e+00 1892 2011 8 3.05748e+01 6.64994e-01 1890 2011 9 2.97714e+01 6.92630e-01 2351 2011 10 2.83902e+01 1.23105e+00 922 2011 11 2.47716e+01 6.98740e-01 2858 2011 12 2.33787e+01 5.40252e-01 2439 2012 1 2.24029e+01 7.12071e-01 2318 2012 2 2.35367e+01 4.95195e-01 1797 2012 3 2.41677e+01 7.38202e-01 3296 2012 4 2.51955e+01 8.19520e-01 2112 2012 5 2.67202e+01 9.35776e-01 2116 2012 6 2.80736e+01 1.27741e+00 1670 2012 7 2.84863e+01 9.35882e-01 2284 2012 8 2.96029e+01 1.17933e+00 2430 2012 9 2.87656e+01 7.00080e-01 2387 2012 10 2.77535e+01 1.03625e+00 2581 2012 11 2.46549e+01 9.69112e-01 2667 2012 12 2.44682e+01 5.65087e-01 2346 2013 1 2.34486e+01 7.24677e-01 2108 2013 2 2.30615e+01 7.51595e-01 2595 2013 3 2.21107e+01 7.16812e-01 1852 2013 4 2.39044e+01 1.57033e+00 2732 2013 5 2.63261e+01 8.55884e-01 2915 2013 6 2.81027e+01 8.94925e-01 1796 2013 7 2.89172e+01 1.33391e+00 2005 2013 8 2.93403e+01 1.38042e+00 1576 2013 9 2.93046e+01 5.64824e-01 1269 2013 10 2.84236e+01 8.46246e-01 2159 2013 11 2.64097e+01 8.77228e-01 1805 2013 12 2.50645e+01 7.01187e-01 1905 2014 1 2.33795e+01 1.00570e+00 1382 2014 2 2.38112e+01 6.83093e-01 2793 2014 3 2.39834e+01 6.61436e-01 2901 2014 4 2.46531e+01 7.67201e-01 2516 2014 5 2.60478e+01 6.49810e-01 2355 2014 6 2.86309e+01 1.13702e+00 2417 2014 7 3.02333e+01 1.10309e+00 2392 2014 8 3.03955e+01 9.49403e-01 2163 2014 9 2.97611e+01 8.61364e-01 1447 2014 10 2.85829e+01 1.05104e+00 1869 2014 11 2.52637e+01 1.17949e+00 2255 2014 12 2.30511e+01 5.92478e-01 2018 2015 1 2.23782e+01 6.49454e-01 1924 2015 2 2.15805e+01 5.77100e-01 2003 2015 3 2.40030e+01 1.30587e+00 3089 2015 4 2.57800e+01 1.25879e+00 2691 2015 5 2.71901e+01 9.48254e-01 2762 2015 6 2.89699e+01 8.57314e-01 2146 2015 7 2.98876e+01 9.88522e-01 2128 2015 8 3.07436e+01 8.81458e-01 1926 2015 9 3.03180e+01 1.07776e+00 1351 2015 10 2.85581e+01 9.68059e-01 1844 2015 11 2.67910e+01 1.16698e+00 2842 2015 12 2.48963e+01 9.42999e-01 1827 2016 1 2.43658e+01 1.33033e+00 731 2016 2 2.26051e+01 7.48068e-01 2036 2016 3 2.38362e+01 1.28573e+00 1444 2016 4 2.45455e+01 1.03509e+00 2833 2016 5 2.65626e+01 1.42667e+00 2982 2016 6 2.87832e+01 7.38720e-01 2319 2016 7 2.97769e+01 8.46554e-01 2564 2016 8 2.99720e+01 7.70600e-01 2167 2016 9 2.96063e+01 1.21980e+00 2795 2016 10 2.83916e+01 1.27936e+00 2076 2016 11 2.54753e+01 1.21329e+00 3406 2016 12 2.43497e+01 6.89450e-01 2785 2017 1 2.30635e+01 8.41299e-01 2682 2017 2 2.21298e+01 6.54330e-01 2548 2017 3 2.29445e+01 7.04609e-01 3490 2017 4 2.50789e+01 8.45912e-01 2118 2017 5 2.68966e+01 8.31307e-01 2571 2017 6 2.86222e+01 1.35712e+00 1814 2017 7 2.95918e+01 8.22882e-01 2018 2017 8 3.03082e+01 9.58988e-01 1911 2017 9 2.96637e+01 7.04479e-01 1842 2017 10 2.84185e+01 9.58071e-01 1347 2017 11 2.57422e+01 6.55674e-01 2912 2017 12 2.45838e+01 9.49628e-01 2991 2018 1 2.15218e+01 1.44921e+00 1975 2018 2 2.22970e+01 1.21680e+00 2467 2018 3 2.41442e+01 7.55563e-01 3104 2018 4 2.48591e+01 6.33816e-01 3061 2018 5 2.49008e+01 6.48694e-01 1483 2018 6 2.83972e+01 1.18676e+00 2114 2018 7 3.00114e+01 9.96810e-01 2123 2018 8 2.97858e+01 8.99957e-01 1742 2018 9 2.96461e+01 9.13298e-01 2300 2018 10 2.82371e+01 6.85991e-01 2941 2018 11 2.65821e+01 7.84171e-01 1943 2018 12 2.42018e+01 1.55123e+00 2258 2019 1 2.34640e+01 1.13137e+00 1827 2019 2 2.39454e+01 1.43517e+00 3030 2019 3 2.51290e+01 8.01110e-01 2973 2019 4 2.55115e+01 8.30957e-01 2810 2019 5 2.71717e+01 7.25097e-01 3607 2019 6 2.97485e+01 1.06096e+00 2427 2019 7 3.03569e+01 1.13059e+00 1796 2019 8 3.05506e+01 1.29208e+00 1720 2019 9 2.92991e+01 1.31225e+00 2614 2019 10 2.83664e+01 8.85137e-01 2587 2019 11 2.68589e+01 1.35542e+00 2584 2019 12 2.49484e+01 6.27613e-01 1981 2020 1 2.37614e+01 7.97287e-01 2718 2020 2 2.23655e+01 6.65099e-01 2562 2020 3 2.36595e+01 1.37864e+00 3852 2020 4 2.63269e+01 8.43996e-01 2837 2020 5 2.67782e+01 1.22023e+00 1912 2020 6 2.91862e+01 8.66138e-01 1718 2020 7 2.99035e+01 1.08876e+00 1895 2020 8 3.03284e+01 1.03025e+00 1912 2020 9 3.00151e+01 9.58252e-01 1756 2020 10 2.89556e+01 8.51787e-01 1507 2020 11 2.62185e+01 1.05556e+00 2250 2020 12 2.35085e+01 1.10301e+00 2081 2021 1 2.17113e+01 7.34425e-01 2039 2021 2 2.21338e+01 7.77765e-01 2936 2021 3 2.37467e+01 6.65009e-01 3171 2021 4 2.46512e+01 1.13254e+00 3135 2021 5 2.68471e+01 7.56421e-01 2776 2021 6 2.79797e+01 8.95085e-01 1386 2021 7 2.91709e+01 9.71984e-01 3044 2021 8 3.00670e+01 1.24928e+00 1850 2021 9 2.99799e+01 7.91571e-01 2184 2021 10 2.88453e+01 7.27992e-01 1957 2021 11 2.59164e+01 1.19178e+00 1722 2021 12 2.49052e+01 6.05823e-01 3278 2022 1 2.42548e+01 9.42370e-01 1805 2022 2 2.29681e+01 9.89642e-01 2784 2022 3 2.48559e+01 6.74725e-01 3329 2022 4 2.53746e+01 7.32352e-01 1825 2022 5 2.69870e+01 9.96718e-01 2932 2022 6 2.88269e+01 1.13813e+00 2468 2022 7 2.96425e+01 9.61295e-01 2219 2022 8 3.02422e+01 8.08343e-01 2010 2022 9 3.05079e+01 8.17303e-01 1750 2022 10 2.75084e+01 7.84932e-01 2636 2022 11 2.67274e+01 6.97202e-01 2707 2022 12 2.56714e+01 1.09210e+00 2555 2023 1 2.27242e+01 8.05266e-01 3126 2023 2 2.43902e+01 5.76459e-01 3185 2023 3 2.50834e+01 8.38844e-01 3394 2023 4 2.64001e+01 8.87990e-01 2751 2023 5 2.76366e+01 7.99260e-01 3544 2023 6 2.89078e+01 9.88312e-01 2741 2023 7 3.08460e+01 9.15093e-01 2968 2023 8 3.12788e+01 1.16863e+00 1945 2023 9 3.06299e+01 7.71661e-01 2533 2023 10 2.87535e+01 1.31572e+00 2435 2023 11 2.65006e+01 7.81161e-01 2064 2023 12 2.47266e+01 1.68961e+00 978 2024 1 2.37983e+01 7.84540e-01 1175 2024 2 2.24746e+01 6.97547e-01 2359 2024 3 2.39210e+01 9.59955e-01 2288 2024 4 2.44300e+01 5.09042e-01 256