YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.85746e+01 4.92261e-01 160 2000 3 2.14914e+01 1.03208e+00 765 2000 4 2.32834e+01 6.25425e-01 495 2000 5 2.65334e+01 1.50916e+00 640 2000 6 2.85374e+01 8.09496e-01 351 2000 7 2.96805e+01 6.44583e-01 371 2000 8 2.90267e+01 9.82497e-01 108 2000 9 2.90433e+01 1.07415e+00 484 2000 10 2.48917e+01 1.77279e+00 740 2000 11 2.26450e+01 1.26007e+00 501 2000 12 1.88667e+01 1.66792e+00 603 2001 1 1.51267e+01 8.68646e-01 170 2001 2 1.87459e+01 2.40809e+00 180 2001 3 1.98215e+01 5.95565e-01 337 2001 4 2.25548e+01 1.67373e+00 440 2001 5 2.41009e+01 2.00262e+00 596 2001 6 2.94641e+01 7.92259e-01 272 2001 7 2.82212e+01 8.14702e-01 382 2001 8 2.91141e+01 1.33359e+00 204 2001 9 2.82805e+01 1.18816e+00 583 2001 10 2.51722e+01 1.71198e+00 482 2001 11 2.18224e+01 7.37898e-01 753 2001 12 2.27018e+01 1.09332e+00 678 2002 1 1.80395e+01 2.10086e+00 551 2002 2 1.83297e+01 8.34112e-01 500 2002 3 2.03974e+01 1.73857e+00 249 2002 4 2.45001e+01 1.48261e+00 625 2002 5 2.70168e+01 9.13961e-01 698 2002 6 2.75782e+01 8.53797e-01 314 2002 7 2.86176e+01 1.76463e+00 1202 2002 8 2.92917e+01 1.24892e+00 1533 2002 9 2.90188e+01 1.37314e+00 1685 2002 10 2.79903e+01 1.13511e+00 2751 2002 11 2.35526e+01 2.78200e+00 2264 2002 12 1.82525e+01 1.01065e+00 1198 2003 1 1.56991e+01 1.44393e+00 1812 2003 2 1.71594e+01 1.33345e+00 892 2003 3 2.27210e+01 1.30310e+00 1242 2003 4 2.25312e+01 9.58884e-01 2366 2003 5 2.74688e+01 1.73208e+00 2689 2003 6 2.84669e+01 8.89482e-01 1115 2003 7 2.95672e+01 1.56715e+00 1395 2003 8 2.93345e+01 1.31792e+00 1844 2003 9 2.88770e+01 8.83728e-01 1804 2003 10 2.64818e+01 1.03686e+00 2534 2003 11 2.37661e+01 1.17720e+00 2634 2003 12 1.80311e+01 1.85499e+00 1469 2004 1 1.69439e+01 1.12249e+00 2118 2004 2 1.75345e+01 1.35383e+00 1139 2004 3 2.01685e+01 1.29486e+00 2400 2004 4 2.14860e+01 1.25712e+00 2448 2004 5 2.59934e+01 1.64327e+00 3027 2004 6 2.97043e+01 1.28118e+00 2653 2004 7 2.97513e+01 1.37880e+00 1911 2004 8 2.98603e+01 1.74305e+00 1764 2004 9 2.82843e+01 1.62826e+00 1483 2004 10 2.65365e+01 1.31163e+00 2380 2004 11 2.36690e+01 1.54809e+00 2629 2004 12 1.88747e+01 2.69679e+00 1507 2005 1 1.75904e+01 1.09387e+00 1880 2005 2 1.68547e+01 9.76438e-01 1704 2005 3 1.95031e+01 1.69052e+00 1402 2005 4 2.23846e+01 7.94402e-01 2247 2005 5 2.52685e+01 1.67312e+00 2357 2005 6 2.79888e+01 1.49117e+00 1638 2005 7 2.95808e+01 1.81752e+00 2374 2005 8 3.10854e+01 1.42861e+00 2234 2005 9 2.83615e+01 1.17887e+00 2276 2005 10 2.61109e+01 2.06889e+00 1837 2005 11 2.19913e+01 9.84748e-01 1664 2005 12 1.88835e+01 1.71718e+00 1734 2006 1 1.75197e+01 7.86245e-01 1515 2006 2 1.74292e+01 1.03689e+00 1632 2006 3 2.02314e+01 1.50475e+00 2502 2006 4 2.37973e+01 1.97756e+00 2883 2006 5 2.60474e+01 1.14831e+00 2796 2006 6 2.83227e+01 1.34502e+00 2117 2006 7 2.94657e+01 1.09782e+00 1937 2006 8 3.03967e+01 1.09072e+00 1981 2006 9 3.00515e+01 9.71126e-01 2399 2006 10 2.68952e+01 1.75588e+00 3054 2006 11 2.17822e+01 1.95233e+00 1435 2006 12 1.91655e+01 8.77683e-01 1279 2007 1 1.97349e+01 1.27329e+00 1958 2007 2 1.71541e+01 9.08987e-01 1117 2007 3 1.92407e+01 1.09063e+00 1867 2007 4 2.23147e+01 1.03197e+00 2646 2007 5 2.42865e+01 8.76179e-01 2484 2007 6 2.72024e+01 1.29247e+00 2377 2007 7 3.06018e+01 1.38108e+00 2092 2007 8 3.05489e+01 1.16818e+00 2207 2007 9 2.95058e+01 1.27367e+00 1565 2007 10 2.75810e+01 9.54792e-01 1635 2007 11 2.22172e+01 1.53830e+00 2876 2007 12 2.14673e+01 9.90524e-01 2614 2008 1 1.80972e+01 1.28221e+00 1748 2008 2 2.00380e+01 9.45606e-01 1607 2008 3 2.00413e+01 1.11119e+00 1633 2008 4 2.33764e+01 1.05761e+00 3057 2008 5 2.60076e+01 1.44182e+00 3018 2008 6 2.90952e+01 1.33964e+00 2411 2008 7 2.93872e+01 1.25906e+00 1432 2008 8 2.97846e+01 9.94034e-01 1804 2008 9 2.83790e+01 1.06825e+00 1895 2008 10 2.60808e+01 1.85927e+00 2547 2008 11 1.97615e+01 1.68202e+00 2576 2008 12 1.85662e+01 1.12328e+00 2024 2009 1 1.78243e+01 1.64525e+00 2163 2009 2 1.62889e+01 1.17623e+00 1595 2009 3 1.87113e+01 1.87382e+00 2188 2009 4 2.30820e+01 7.49209e-01 2421 2009 5 2.65048e+01 1.81225e+00 2133 2009 6 2.90187e+01 1.07122e+00 2381 2009 7 2.96944e+01 1.48953e+00 2692 2009 8 3.04342e+01 1.00875e+00 1853 2009 9 2.97463e+01 1.01894e+00 1913 2009 10 2.78351e+01 2.37750e+00 3122 2009 11 2.31651e+01 1.74741e+00 1619 2009 12 1.99881e+01 1.73420e+00 1278 2010 1 1.49235e+01 2.67465e+00 906 2010 2 1.47034e+01 1.27110e+00 964 2010 3 1.59068e+01 1.66847e+00 1978 2010 4 2.02827e+01 1.87152e+00 1831 2010 5 2.66868e+01 1.84274e+00 2969 2010 6 2.98168e+01 9.86721e-01 2550 2010 7 2.87244e+01 1.33135e+00 2096 2010 8 3.05194e+01 1.14052e+00 1742 2010 9 2.94377e+01 1.23907e+00 2327 2010 10 2.61070e+01 1.09131e+00 3270 2010 11 2.20714e+01 1.61933e+00 2820 2010 12 1.72871e+01 3.03536e+00 2108 2011 1 1.43899e+01 9.46336e-01 1385 2011 2 1.72595e+01 1.51682e+00 1634 2011 3 2.00475e+01 1.09298e+00 2434 2011 4 2.51267e+01 1.53692e+00 3213 2011 5 2.71556e+01 1.02906e+00 3240 2011 6 2.90253e+01 1.42205e+00 2428 2011 7 2.97630e+01 1.43650e+00 2059 2011 8 2.99482e+01 1.40701e+00 2104 2011 9 2.91161e+01 1.13191e+00 2401 2011 10 2.59846e+01 2.06020e+00 1897 2011 11 2.14124e+01 5.99351e-01 2430 2011 12 1.99869e+01 6.27918e-01 2205 2012 1 1.81875e+01 1.04599e+00 2046 2012 2 1.90612e+01 1.74828e+00 1339 2012 3 2.26518e+01 1.07911e+00 2579 2012 4 2.43127e+01 1.23931e+00 2391 2012 5 2.68648e+01 1.40431e+00 2588 2012 6 2.81736e+01 1.10447e+00 1808 2012 7 2.91228e+01 1.32598e+00 2524 2012 8 2.99610e+01 1.98810e+00 1577 2012 9 2.85868e+01 1.29779e+00 2059 2012 10 2.69232e+01 1.80581e+00 2299 2012 11 2.06707e+01 1.18872e+00 2320 2012 12 1.96506e+01 1.51417e+00 1818 2013 1 1.96382e+01 1.22315e+00 1452 2013 2 1.91600e+01 1.10277e+00 2123 2013 3 1.86951e+01 7.67831e-01 1939 2013 4 2.34328e+01 2.08712e+00 2022 2013 5 2.57815e+01 1.09453e+00 3198 2013 6 2.87475e+01 1.96139e+00 2056 2013 7 2.90561e+01 9.52360e-01 1393 2013 8 3.02258e+01 1.32919e+00 1569 2013 9 2.94963e+01 1.18214e+00 2374 2013 10 2.71088e+01 1.43990e+00 2281 2013 11 2.28054e+01 1.25315e+00 1618 2013 12 2.09937e+01 1.00832e+00 1769 2014 1 1.77582e+01 1.79753e+00 1424 2014 2 1.85041e+01 1.35213e+00 1289 2014 3 2.05871e+01 7.66102e-01 1780 2014 4 2.28323e+01 1.62051e+00 1711 2014 5 2.59882e+01 1.19654e+00 1945 2014 6 2.87024e+01 1.58922e+00 1984 2014 7 3.04932e+01 1.19551e+00 2109 2014 8 3.04374e+01 1.47565e+00 2289 2014 9 2.96513e+01 1.28332e+00 1449 2014 10 2.72098e+01 1.63239e+00 2890 2014 11 2.17624e+01 1.91708e+00 2000 2014 12 1.89945e+01 9.92556e-01 2324 2015 1 1.87963e+01 1.51372e+00 2132 2015 2 1.72034e+01 9.86115e-01 1956 2015 3 2.21104e+01 1.46696e+00 2253 2015 4 2.48225e+01 2.11776e+00 1981 2015 5 2.71373e+01 1.33292e+00 2837 2015 6 2.94510e+01 1.32004e+00 1788 2015 7 3.01578e+01 1.24070e+00 1882 2015 8 3.02262e+01 1.48613e+00 1660 2015 9 2.97127e+01 1.44535e+00 1063 2015 10 2.71536e+01 1.48801e+00 1789 2015 11 2.52227e+01 1.68176e+00 2568 2015 12 2.22922e+01 1.23871e+00 1771 2016 1 2.03766e+01 1.91345e+00 997 2016 2 1.72852e+01 1.35636e+00 1451 2016 3 1.99031e+01 2.27858e+00 1455 2016 4 2.36231e+01 1.25930e+00 2275 2016 5 2.62408e+01 1.39608e+00 2548 2016 6 2.88743e+01 1.48938e+00 2301 2016 7 3.07993e+01 1.07362e+00 2127 2016 8 3.02823e+01 1.52791e+00 1986 2016 9 2.95986e+01 1.57356e+00 2323 2016 10 2.67390e+01 2.13477e+00 2244 2016 11 2.28770e+01 1.54809e+00 2152 2016 12 2.12639e+01 8.84665e-01 3109 2017 1 1.96210e+01 1.10772e+00 2128 2017 2 1.97145e+01 9.57365e-01 2140 2017 3 2.08070e+01 1.22171e+00 2820 2017 4 2.38463e+01 1.04338e+00 2192 2017 5 2.64233e+01 1.34169e+00 2655 2017 6 2.86076e+01 1.58707e+00 1133 2017 7 3.05141e+01 1.52784e+00 2077 2017 8 3.09612e+01 1.50339e+00 2144 2017 9 2.92915e+01 1.27679e+00 2149 2017 10 2.69678e+01 1.84202e+00 2050 2017 11 2.26980e+01 8.35669e-01 3094 2017 12 2.11974e+01 1.27352e+00 2823 2018 1 1.60160e+01 1.66690e+00 1176 2018 2 2.09615e+01 2.28838e+00 2347 2018 3 2.08730e+01 1.28422e+00 2877 2018 4 2.35892e+01 1.16684e+00 2356 2018 5 2.44019e+01 1.66332e+00 1200 2018 6 2.91041e+01 1.56483e+00 2473 2018 7 3.04520e+01 9.96206e-01 1952 2018 8 3.09083e+01 1.06465e+00 1885 2018 9 3.01712e+01 1.27659e+00 2397 2018 10 2.80146e+01 1.20047e+00 2592 2018 11 2.46250e+01 1.79901e+00 2045 2018 12 1.91835e+01 1.82726e+00 1539 2019 1 1.87228e+01 1.43381e+00 1918 2019 2 1.95476e+01 1.96333e+00 1796 2019 3 2.18552e+01 1.08691e+00 2659 2019 4 2.44610e+01 1.45719e+00 2353 2019 5 2.75759e+01 1.15424e+00 2560 2019 6 3.01783e+01 9.85818e-01 2270 2019 7 3.02872e+01 1.28604e+00 2149 2019 8 3.01562e+01 7.17555e-01 1181 2019 9 2.92325e+01 1.25500e+00 2583 2019 10 2.77368e+01 7.67631e-01 2456 2019 11 2.35428e+01 2.36559e+00 1856 2019 12 2.07667e+01 1.20740e+00 1391 2020 1 1.96527e+01 1.32353e+00 2702 2020 2 1.97454e+01 1.57369e+00 2175 2020 3 2.25730e+01 2.43072e+00 3059 2020 4 2.58234e+01 8.71099e-01 1718 2020 5 2.61943e+01 1.07423e+00 2816 2020 6 3.00347e+01 1.34875e+00 1916 2020 7 3.05780e+01 9.42558e-01 1874 2020 8 3.09012e+01 1.02505e+00 1640 2020 9 2.98703e+01 1.39699e+00 1609 2020 10 2.78316e+01 9.08800e-01 1727 2020 11 2.41392e+01 1.45994e+00 2305 2020 12 1.93103e+01 1.49903e+00 2671 2021 1 1.79048e+01 1.05137e+00 1836 2021 2 2.01156e+01 1.90023e+00 2266 2021 3 2.16850e+01 1.42586e+00 2326 2021 4 2.41767e+01 1.63027e+00 2994 2021 5 2.70505e+01 1.11482e+00 2956 2021 6 2.81643e+01 1.28726e+00 1132 2021 7 2.98779e+01 1.25747e+00 1880 2021 8 3.04513e+01 1.01877e+00 1877 2021 9 2.99409e+01 1.15999e+00 2378 2021 10 2.84201e+01 1.22014e+00 2394 2021 11 2.22104e+01 1.71517e+00 2539 2021 12 2.11635e+01 1.02315e+00 3223 2022 1 2.01061e+01 1.91222e+00 2378 2022 2 1.84508e+01 1.93671e+00 2360 2022 3 2.16953e+01 1.66598e+00 3375 2022 4 2.42571e+01 8.92102e-01 1691 2022 5 2.73801e+01 1.38539e+00 2647 2022 6 2.92540e+01 1.20347e+00 2448 2022 7 3.10831e+01 9.83573e-01 2735 2022 8 3.07859e+01 9.84416e-01 1840 2022 9 3.01810e+01 1.28278e+00 1726 2022 10 2.55424e+01 1.26757e+00 2543 2022 11 2.43119e+01 1.29365e+00 2024 2022 12 2.17325e+01 2.26546e+00 2308 2023 1 1.86765e+01 1.33599e+00 2436 2023 2 2.12613e+01 1.54127e+00 2771 2023 3 2.34861e+01 1.45785e+00 3499 2023 4 2.57704e+01 1.19033e+00 1909 2023 5 2.74123e+01 1.55426e+00 3633 2023 6 2.90859e+01 1.46209e+00 2846 2023 7 3.16922e+01 8.93520e-01 2055 2023 8 3.16342e+01 1.21743e+00 2419 2023 9 3.06427e+01 1.10980e+00 2370 2023 10 2.58675e+01 1.84197e+00 1876 2023 11 2.30862e+01 1.20244e+00 1842 2023 12 1.87423e+01 1.45685e+00 862 2024 1 1.82599e+01 1.09414e+00 1161 2024 2 1.81387e+01 7.64755e-01 2146 2024 3 2.28565e+01 1.04963e+00 1571 2024 4 2.30595e+01 3.78922e-01 226