YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.44411e+01 2.43619e-01 128 2000 3 2.47895e+01 3.95969e-01 526 2000 4 2.53929e+01 5.52393e-01 448 2000 5 2.63024e+01 1.63108e+00 407 2000 6 2.80355e+01 8.69984e-01 519 2000 7 2.90229e+01 1.82674e+00 517 2000 8 2.92858e+01 6.25757e-01 490 2000 9 2.92274e+01 8.21989e-01 451 2000 10 2.81626e+01 1.32974e+00 349 2000 11 2.58924e+01 1.14179e+00 329 2000 12 2.46116e+01 5.40625e-01 339 2001 1 2.32817e+01 9.80233e-01 540 2001 2 2.39998e+01 7.82216e-01 529 2001 3 2.39551e+01 5.53790e-01 591 2001 4 2.55581e+01 6.11680e-01 783 2001 5 2.59684e+01 1.08867e+00 521 2001 6 2.82783e+01 1.02852e+00 365 2001 7 2.86281e+01 1.67669e+00 513 2001 8 2.91412e+01 3.34670e-01 523 2001 9 2.84716e+01 9.93421e-01 277 2001 10 2.72720e+01 7.38254e-01 289 2001 11 2.63649e+01 9.44289e-01 383 2001 12 2.49064e+01 8.89741e-01 394 2002 1 2.34628e+01 8.12439e-01 689 2002 2 2.38729e+01 7.37045e-01 218 2002 3 2.54823e+01 1.33529e+00 437 2002 4 2.66439e+01 1.14867e+00 510 2002 5 2.72701e+01 8.89207e-01 567 2002 6 2.78076e+01 7.10117e-01 148 2002 7 2.89193e+01 9.89723e-01 1827 2002 8 2.93239e+01 1.00365e+00 1886 2002 9 2.85365e+01 1.11844e+00 1837 2002 10 2.81149e+01 5.98904e-01 3067 2002 11 2.71140e+01 1.24504e+00 1980 2002 12 2.48732e+01 1.10409e+00 1972 2003 1 2.31542e+01 1.07108e+00 2240 2003 2 2.30022e+01 9.87778e-01 2615 2003 3 2.54964e+01 9.40424e-01 2059 2003 4 2.52113e+01 8.83146e-01 2314 2003 5 2.73218e+01 1.05629e+00 2722 2003 6 2.82414e+01 1.01851e+00 1334 2003 7 2.86051e+01 1.02332e+00 1919 2003 8 2.96067e+01 1.26284e+00 1543 2003 9 2.91428e+01 6.13648e-01 1915 2003 10 2.83059e+01 1.00288e+00 2781 2003 11 2.69263e+01 6.32369e-01 1478 2003 12 2.48241e+01 1.14253e+00 1300 2004 1 2.49428e+01 7.84472e-01 1936 2004 2 2.37279e+01 9.81574e-01 1832 2004 3 2.46945e+01 1.11247e+00 1806 2004 4 2.45450e+01 8.58373e-01 2694 2004 5 2.61170e+01 1.01864e+00 2884 2004 6 2.87255e+01 7.60657e-01 2702 2004 7 2.94147e+01 1.33615e+00 2535 2004 8 3.02731e+01 1.06981e+00 1260 2004 9 2.87534e+01 9.74193e-01 1778 2004 10 2.76268e+01 8.95349e-01 2136 2004 11 2.65720e+01 8.85181e-01 1983 2004 12 2.52017e+01 1.23988e+00 1521 2005 1 2.40437e+01 8.75513e-01 2600 2005 2 2.34621e+01 1.18835e+00 1693 2005 3 2.38576e+01 8.83556e-01 2319 2005 4 2.41451e+01 1.00375e+00 2741 2005 5 2.59287e+01 1.32308e+00 2441 2005 6 2.79563e+01 8.99132e-01 1338 2005 7 2.89808e+01 1.01406e+00 2821 2005 8 3.00466e+01 9.78105e-01 2487 2005 9 2.92041e+01 1.09653e+00 1980 2005 10 2.72773e+01 1.31280e+00 1265 2005 11 2.57417e+01 7.91600e-01 2865 2005 12 2.42944e+01 1.13230e+00 2330 2006 1 2.32078e+01 8.14488e-01 2114 2006 2 2.36227e+01 7.60884e-01 2357 2006 3 2.46659e+01 9.72157e-01 3070 2006 4 2.55366e+01 1.14620e+00 2974 2006 5 2.68766e+01 7.91748e-01 2636 2006 6 2.81767e+01 7.86220e-01 2154 2006 7 2.89116e+01 9.42271e-01 1609 2006 8 2.94357e+01 8.77756e-01 1811 2006 9 3.00544e+01 8.75142e-01 2152 2006 10 2.85866e+01 9.36256e-01 2413 2006 11 2.60260e+01 1.34266e+00 1780 2006 12 2.49585e+01 1.08867e+00 1358 2007 1 2.47488e+01 1.09895e+00 2086 2007 2 2.38469e+01 1.02382e+00 1681 2007 3 2.42480e+01 7.17241e-01 1697 2007 4 2.50718e+01 1.00832e+00 3057 2007 5 2.65060e+01 1.00509e+00 2732 2007 6 2.79860e+01 1.07816e+00 1684 2007 7 2.99233e+01 8.18401e-01 2371 2007 8 2.98681e+01 7.99392e-01 2854 2007 9 2.97210e+01 9.44310e-01 1544 2007 10 2.80694e+01 6.77808e-01 1431 2007 11 2.64445e+01 8.61347e-01 2649 2007 12 2.51479e+01 8.63168e-01 2701 2008 1 2.40914e+01 8.67338e-01 1934 2008 2 2.43329e+01 1.09637e+00 2238 2008 3 2.38279e+01 1.01485e+00 1778 2008 4 2.53701e+01 9.80955e-01 2914 2008 5 2.68022e+01 1.14185e+00 3370 2008 6 2.80238e+01 8.87292e-01 2111 2008 7 2.90819e+01 1.03485e+00 2011 2008 8 2.94588e+01 1.30345e+00 2146 2008 9 2.81722e+01 8.45440e-01 2178 2008 10 2.81095e+01 9.91856e-01 1499 2008 11 2.57112e+01 1.03850e+00 2247 2008 12 2.41937e+01 9.44885e-01 2374 2009 1 2.31400e+01 1.03566e+00 2893 2009 2 2.31504e+01 8.25563e-01 2298 2009 3 2.35975e+01 9.70027e-01 2171 2009 4 2.48575e+01 6.78361e-01 2820 2009 5 2.63346e+01 1.08193e+00 2835 2009 6 2.89796e+01 1.05542e+00 2193 2009 7 2.93819e+01 9.00831e-01 1909 2009 8 2.98427e+01 1.00931e+00 2617 2009 9 2.96799e+01 8.97018e-01 1620 2009 10 2.89117e+01 1.18212e+00 2919 2009 11 2.73183e+01 8.65365e-01 1806 2009 12 2.55387e+01 7.81584e-01 1629 2010 1 2.39754e+01 1.29013e+00 1660 2010 2 2.30088e+01 1.25463e+00 1351 2010 3 2.21342e+01 8.50934e-01 2188 2010 4 2.40236e+01 1.17447e+00 1959 2010 5 2.69397e+01 1.17890e+00 3214 2010 6 2.96040e+01 8.94912e-01 2868 2010 7 2.91765e+01 1.53958e+00 1654 2010 8 2.99948e+01 1.25639e+00 2047 2010 9 2.93942e+01 7.14342e-01 2205 2010 10 2.77397e+01 9.48283e-01 2797 2010 11 2.63332e+01 1.23221e+00 2321 2010 12 2.44366e+01 1.42156e+00 3200 2011 1 2.25463e+01 1.40415e+00 2161 2011 2 2.23759e+01 1.03513e+00 2483 2011 3 2.46081e+01 1.03194e+00 2733 2011 4 2.58007e+01 7.92412e-01 3329 2011 5 2.70833e+01 6.66996e-01 3080 2011 6 2.81980e+01 1.54879e+00 2118 2011 7 2.95474e+01 8.31156e-01 2295 2011 8 2.97683e+01 1.24890e+00 1718 2011 9 2.99027e+01 9.91267e-01 2070 2011 10 2.85085e+01 1.04194e+00 1331 2011 11 2.58082e+01 7.74518e-01 2323 2011 12 2.46271e+01 8.16073e-01 2336 2012 1 2.36463e+01 8.54804e-01 2071 2012 2 2.45974e+01 6.69373e-01 1731 2012 3 2.46431e+01 9.96525e-01 2528 2012 4 2.57612e+01 9.52823e-01 2219 2012 5 2.64154e+01 1.27071e+00 1921 2012 6 2.81436e+01 1.07173e+00 1568 2012 7 2.86660e+01 8.16073e-01 2427 2012 8 2.92390e+01 1.47889e+00 2059 2012 9 2.90254e+01 9.83648e-01 1929 2012 10 2.80746e+01 8.33426e-01 2502 2012 11 2.70886e+01 8.24519e-01 2292 2012 12 2.55166e+01 9.78747e-01 1963 2013 1 2.43476e+01 7.74756e-01 2172 2013 2 2.42302e+01 1.02193e+00 2353 2013 3 2.39767e+01 1.16088e+00 1976 2013 4 2.55589e+01 1.16975e+00 2344 2013 5 2.65328e+01 7.74934e-01 2557 2013 6 2.79544e+01 6.59180e-01 1355 2013 7 2.85835e+01 1.30981e+00 1539 2013 8 2.90963e+01 1.16904e+00 1829 2013 9 2.91174e+01 7.15629e-01 1657 2013 10 2.83566e+01 8.71890e-01 2498 2013 11 2.69053e+01 1.02110e+00 1619 2013 12 2.56171e+01 1.01346e+00 1765 2014 1 2.52052e+01 1.17023e+00 1955 2014 2 2.50401e+01 9.52833e-01 2841 2014 3 2.47569e+01 7.50483e-01 2669 2014 4 2.57198e+01 1.20090e+00 2369 2014 5 2.65353e+01 9.36890e-01 2170 2014 6 2.86315e+01 1.07242e+00 1919 2014 7 2.97361e+01 9.13189e-01 2204 2014 8 3.06015e+01 9.12046e-01 2943 2014 9 2.95450e+01 1.01743e+00 1677 2014 10 2.83147e+01 1.06047e+00 2675 2014 11 2.62100e+01 1.07705e+00 2483 2014 12 2.53266e+01 9.83622e-01 2310 2015 1 2.48666e+01 7.12053e-01 1817 2015 2 2.41554e+01 1.10530e+00 2100 2015 3 2.50067e+01 9.91466e-01 3040 2015 4 2.63401e+01 1.26759e+00 3252 2015 5 2.70836e+01 9.71897e-01 3037 2015 6 2.89375e+01 9.77146e-01 1593 2015 7 2.98623e+01 9.95490e-01 2115 2015 8 3.02107e+01 1.36656e+00 1963 2015 9 2.98183e+01 1.40206e+00 1384 2015 10 2.85406e+01 1.16597e+00 2048 2015 11 2.75155e+01 9.55116e-01 2241 2015 12 2.54976e+01 7.63648e-01 1619 2016 1 2.56482e+01 7.69003e-01 1101 2016 2 2.49405e+01 1.17744e+00 1651 2016 3 2.46525e+01 1.34227e+00 1039 2016 4 2.59471e+01 8.02659e-01 2767 2016 5 2.73134e+01 1.00740e+00 2607 2016 6 2.88639e+01 8.47857e-01 2346 2016 7 2.96054e+01 7.92185e-01 2660 2016 8 3.03431e+01 1.00854e+00 1621 2016 9 2.95892e+01 1.20740e+00 2426 2016 10 2.87140e+01 8.52372e-01 1481 2016 11 2.70291e+01 8.20771e-01 2064 2016 12 2.59359e+01 8.58933e-01 1965 2017 1 2.50261e+01 8.37771e-01 2207 2017 2 2.43526e+01 9.34401e-01 2494 2017 3 2.48808e+01 1.02006e+00 2522 2017 4 2.58008e+01 7.77443e-01 1674 2017 5 2.69989e+01 1.10115e+00 3108 2017 6 2.82789e+01 1.37379e+00 1312 2017 7 2.96961e+01 7.50950e-01 2304 2017 8 3.02204e+01 1.18448e+00 2403 2017 9 2.96549e+01 7.91982e-01 2699 2017 10 2.85363e+01 7.61650e-01 1784 2017 11 2.65728e+01 6.98223e-01 2902 2017 12 2.57986e+01 9.58379e-01 3225 2018 1 2.41377e+01 1.47339e+00 1229 2018 2 2.43448e+01 1.12711e+00 2700 2018 3 2.52747e+01 1.10500e+00 3551 2018 4 2.57906e+01 8.92173e-01 2951 2018 5 2.56322e+01 1.42195e+00 887 2018 6 2.86101e+01 1.15658e+00 1801 2018 7 3.01416e+01 9.93853e-01 2011 2018 8 2.97807e+01 8.17923e-01 2689 2018 9 2.98239e+01 7.86084e-01 2239 2018 10 2.82490e+01 8.54686e-01 3039 2018 11 2.71716e+01 7.91285e-01 2224 2018 12 2.54536e+01 1.23725e+00 1910 2019 1 2.49183e+01 9.37773e-01 2388 2019 2 2.49886e+01 9.31726e-01 2710 2019 3 2.57957e+01 1.07045e+00 2439 2019 4 2.59969e+01 6.92434e-01 2824 2019 5 2.72686e+01 8.69895e-01 3109 2019 6 2.97729e+01 1.18300e+00 2250 2019 7 2.97177e+01 1.17914e+00 2186 2019 8 3.04341e+01 1.10056e+00 2139 2019 9 2.91205e+01 1.21756e+00 2044 2019 10 2.85001e+01 8.75096e-01 2534 2019 11 2.78773e+01 9.72744e-01 2363 2019 12 2.56822e+01 8.53001e-01 1977 2020 1 2.52585e+01 9.27792e-01 2663 2020 2 2.55465e+01 1.38201e+00 2018 2020 3 2.52913e+01 7.96313e-01 3363 2020 4 2.65058e+01 8.03107e-01 2419 2020 5 2.71463e+01 9.20596e-01 1807 2020 6 2.88584e+01 1.08052e+00 1646 2020 7 2.99701e+01 9.92921e-01 2119 2020 8 3.01343e+01 1.24227e+00 2362 2020 9 2.98196e+01 8.61935e-01 2048 2020 10 2.86598e+01 1.27258e+00 1985 2020 11 2.68802e+01 7.50597e-01 1524 2020 12 2.58148e+01 1.24424e+00 2208 2021 1 2.39525e+01 1.11739e+00 2393 2021 2 2.41652e+01 1.05859e+00 2813 2021 3 2.50222e+01 7.06952e-01 2708 2021 4 2.57175e+01 8.51583e-01 2735 2021 5 2.70547e+01 9.00606e-01 2568 2021 6 2.76517e+01 1.15116e+00 1227 2021 7 2.94060e+01 1.20318e+00 2274 2021 8 2.99921e+01 9.80962e-01 2356 2021 9 2.98040e+01 9.36188e-01 2549 2021 10 2.89556e+01 7.28008e-01 2410 2021 11 2.66883e+01 7.38062e-01 1704 2021 12 2.58947e+01 9.07960e-01 2723 2022 1 2.52036e+01 6.45836e-01 2002 2022 2 2.46139e+01 9.20509e-01 2377 2022 3 2.56871e+01 7.70017e-01 2879 2022 4 2.61364e+01 8.06810e-01 1524 2022 5 2.75449e+01 9.93740e-01 2636 2022 6 2.88653e+01 1.02413e+00 2271 2022 7 2.96775e+01 8.94824e-01 2972 2022 8 3.00511e+01 7.96851e-01 2579 2022 9 3.06534e+01 1.01208e+00 2120 2022 10 2.78011e+01 8.66256e-01 2155 2022 11 2.73959e+01 6.19224e-01 2570 2022 12 2.62603e+01 7.34408e-01 1956 2023 1 2.50693e+01 9.34049e-01 3012 2023 2 2.50747e+01 1.25747e+00 2825 2023 3 2.54012e+01 9.68407e-01 2638 2023 4 2.65732e+01 6.96921e-01 2031 2023 5 2.74903e+01 1.06882e+00 2606 2023 6 2.92752e+01 8.85073e-01 2229 2023 7 3.11640e+01 1.07364e+00 1922 2023 8 3.07917e+01 8.95130e-01 2468 2023 9 3.06207e+01 9.33841e-01 2033 2023 10 2.90448e+01 1.22475e+00 2322 2023 11 2.74364e+01 8.36889e-01 2102 2023 12 2.60862e+01 8.09965e-01 1149 2024 1 2.50022e+01 1.08125e+00 1405 2024 2 2.41080e+01 7.94633e-01 2182 2024 3 2.50614e+01 9.90241e-01 2075 2024 4 2.51566e+01 8.48696e-01 222