YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.06447e+01 8.96641e-01 177 2000 3 2.35045e+01 8.95584e-01 718 2000 4 2.37686e+01 8.92184e-01 548 2000 5 2.72593e+01 1.61490e+00 520 2000 6 2.85428e+01 7.17576e-01 76 2000 7 3.00237e+01 1.34844e+00 366 2000 8 2.94645e+01 3.53708e-01 64 2000 9 2.85000e+01 1.25556e+00 477 2000 10 2.48544e+01 2.85470e+00 620 2000 11 2.29541e+01 1.47854e+00 644 2000 12 1.98555e+01 1.77778e+00 518 2001 1 1.53203e+01 1.94598e+00 198 2001 2 2.11557e+01 2.01576e+00 566 2001 3 2.12533e+01 2.06867e+00 421 2001 4 2.33036e+01 2.32343e+00 576 2001 5 2.44092e+01 1.67629e+00 520 2001 6 3.05986e+01 4.00541e-01 166 2001 7 2.83351e+01 1.14568e+00 205 2001 8 3.10319e+01 9.61829e-01 271 2001 9 2.99671e+01 9.89945e-01 279 2001 10 2.58197e+01 1.36880e+00 217 2001 11 2.21753e+01 6.98136e-01 800 2001 12 2.30037e+01 1.25375e+00 837 2002 1 2.14205e+01 2.11283e+00 511 2002 2 1.87703e+01 2.22782e+00 442 2002 3 2.13509e+01 2.42901e+00 446 2002 4 2.60025e+01 1.62447e+00 638 2002 5 2.76524e+01 1.46193e+00 566 2002 6 2.80907e+01 1.07592e+00 235 2002 7 2.93769e+01 1.88353e+00 1567 2002 8 2.96775e+01 1.41623e+00 1410 2002 9 2.96817e+01 1.37034e+00 1351 2002 10 2.80307e+01 1.35802e+00 3109 2002 11 2.42536e+01 2.48666e+00 1872 2002 12 1.81815e+01 1.15648e+00 1162 2003 1 1.53894e+01 1.47138e+00 1483 2003 2 1.93918e+01 2.03423e+00 1999 2003 3 2.46079e+01 1.53498e+00 1785 2003 4 2.36191e+01 2.17951e+00 2320 2003 5 2.84942e+01 1.57853e+00 3049 2003 6 2.91107e+01 1.47796e+00 1652 2003 7 2.99660e+01 1.75787e+00 1480 2003 8 2.93408e+01 1.52147e+00 1451 2003 9 2.91311e+01 1.07687e+00 1696 2003 10 2.68442e+01 1.33558e+00 2715 2003 11 2.36807e+01 1.40154e+00 2547 2003 12 1.79669e+01 1.49491e+00 1584 2004 1 1.81900e+01 1.69855e+00 2094 2004 2 1.87935e+01 1.50737e+00 1322 2004 3 2.10682e+01 1.48561e+00 2296 2004 4 2.28232e+01 2.06000e+00 2413 2004 5 2.70120e+01 1.81426e+00 2838 2004 6 3.03770e+01 9.08872e-01 2533 2004 7 2.99115e+01 1.71396e+00 2340 2004 8 3.01165e+01 1.74173e+00 2064 2004 9 2.80865e+01 1.97138e+00 1813 2004 10 2.65604e+01 1.69944e+00 2558 2004 11 2.35924e+01 1.69825e+00 2858 2004 12 1.99367e+01 2.92786e+00 1257 2005 1 1.83380e+01 2.10674e+00 1979 2005 2 1.81733e+01 1.45343e+00 1782 2005 3 2.07866e+01 2.08566e+00 1328 2005 4 2.30358e+01 1.43613e+00 2595 2005 5 2.65231e+01 1.97487e+00 2378 2005 6 2.86347e+01 1.65022e+00 1172 2005 7 3.04110e+01 1.48219e+00 2473 2005 8 3.12640e+01 1.58886e+00 2143 2005 9 2.93314e+01 9.27031e-01 2055 2005 10 2.58081e+01 2.80635e+00 1796 2005 11 2.25496e+01 1.65175e+00 2421 2005 12 1.94250e+01 1.71185e+00 1698 2006 1 1.89104e+01 1.76047e+00 1840 2006 2 1.89159e+01 2.09514e+00 2114 2006 3 2.15331e+01 1.63238e+00 2906 2006 4 2.51568e+01 2.33256e+00 2704 2006 5 2.69828e+01 1.60872e+00 2454 2006 6 2.93715e+01 1.36721e+00 2404 2006 7 2.91745e+01 1.60646e+00 1814 2006 8 3.00570e+01 1.30510e+00 2107 2006 9 2.97303e+01 1.53216e+00 2654 2006 10 2.66304e+01 2.22953e+00 3306 2006 11 2.22999e+01 1.78928e+00 1472 2006 12 2.01704e+01 1.41631e+00 1672 2007 1 2.05537e+01 1.97154e+00 2015 2007 2 1.77542e+01 1.77762e+00 1116 2007 3 2.05788e+01 1.39893e+00 1887 2007 4 2.29413e+01 1.77867e+00 2168 2007 5 2.53681e+01 1.39555e+00 3050 2007 6 2.83460e+01 1.58177e+00 2284 2007 7 3.11112e+01 1.31149e+00 1924 2007 8 3.07136e+01 9.97990e-01 2491 2007 9 2.94769e+01 1.56561e+00 2153 2007 10 2.73011e+01 1.58593e+00 1562 2007 11 2.18886e+01 1.59529e+00 2672 2007 12 2.17439e+01 1.74727e+00 2423 2008 1 1.86499e+01 1.90330e+00 1694 2008 2 2.13207e+01 1.45654e+00 1531 2008 3 2.07917e+01 1.60713e+00 1911 2008 4 2.43234e+01 1.52456e+00 2414 2008 5 2.69379e+01 1.50215e+00 3404 2008 6 2.98059e+01 1.21676e+00 1866 2008 7 3.01048e+01 1.30604e+00 1271 2008 8 3.01633e+01 1.50070e+00 2260 2008 9 2.84408e+01 1.51746e+00 1481 2008 10 2.60857e+01 1.87489e+00 2215 2008 11 1.96866e+01 2.24761e+00 2432 2008 12 1.96597e+01 1.36911e+00 2453 2009 1 1.84766e+01 2.48120e+00 2335 2009 2 1.74772e+01 2.17002e+00 1762 2009 3 2.08600e+01 2.07155e+00 2176 2009 4 2.36918e+01 1.65774e+00 2702 2009 5 2.75170e+01 1.68032e+00 2252 2009 6 2.94491e+01 1.49306e+00 2480 2009 7 3.03534e+01 1.59220e+00 2510 2009 8 3.04042e+01 1.34340e+00 2115 2009 9 2.99498e+01 1.08716e+00 1911 2009 10 2.84120e+01 2.49650e+00 3207 2009 11 2.31811e+01 2.27803e+00 1751 2009 12 2.00460e+01 2.73563e+00 1227 2010 1 1.57574e+01 2.92181e+00 978 2010 2 1.60542e+01 1.84932e+00 1402 2010 3 1.73772e+01 2.20579e+00 1830 2010 4 2.25024e+01 1.81209e+00 1502 2010 5 2.79834e+01 1.54054e+00 3250 2010 6 3.07513e+01 1.18651e+00 3041 2010 7 2.93789e+01 1.52336e+00 1971 2010 8 3.06115e+01 1.44243e+00 1917 2010 9 2.93887e+01 1.35621e+00 2143 2010 10 2.59442e+01 1.33983e+00 3457 2010 11 2.20648e+01 2.08871e+00 2688 2010 12 1.66540e+01 3.34549e+00 1626 2011 1 1.59876e+01 1.46275e+00 1588 2011 2 1.95931e+01 2.35654e+00 2096 2011 3 2.16323e+01 1.73766e+00 2529 2011 4 2.62855e+01 1.48255e+00 2983 2011 5 2.77336e+01 1.28196e+00 3163 2011 6 2.97193e+01 1.76295e+00 2417 2011 7 3.03155e+01 1.37779e+00 1690 2011 8 3.05003e+01 1.09553e+00 2056 2011 9 2.96014e+01 1.06756e+00 2317 2011 10 2.48422e+01 2.39573e+00 1844 2011 11 2.21919e+01 1.31928e+00 2650 2011 12 2.05928e+01 1.22026e+00 2272 2012 1 1.82712e+01 2.01440e+00 2185 2012 2 2.07673e+01 2.45009e+00 1431 2012 3 2.35986e+01 1.61923e+00 3012 2012 4 2.47057e+01 1.47541e+00 2453 2012 5 2.77331e+01 1.66778e+00 2504 2012 6 2.90098e+01 1.46063e+00 1481 2012 7 2.99583e+01 1.24730e+00 2055 2012 8 3.04759e+01 1.30549e+00 1446 2012 9 2.91619e+01 1.32316e+00 2024 2012 10 2.69066e+01 1.81460e+00 1966 2012 11 2.03712e+01 1.26244e+00 2199 2012 12 2.03344e+01 1.89670e+00 1923 2013 1 2.07470e+01 1.76437e+00 1853 2013 2 1.96958e+01 2.10752e+00 2314 2013 3 1.93941e+01 1.78805e+00 1828 2013 4 2.47401e+01 2.30415e+00 2066 2013 5 2.64250e+01 1.55880e+00 2854 2013 6 2.88440e+01 2.54803e+00 2072 2013 7 2.94476e+01 1.70835e+00 1662 2013 8 3.01786e+01 1.62486e+00 1813 2013 9 2.97020e+01 1.76677e+00 2014 2013 10 2.72625e+01 2.01519e+00 2392 2013 11 2.30471e+01 1.95177e+00 1904 2013 12 2.18878e+01 1.72303e+00 2132 2014 1 1.74179e+01 1.67872e+00 1537 2014 2 2.05940e+01 1.61681e+00 1722 2014 3 2.18748e+01 9.02259e-01 1979 2014 4 2.41917e+01 1.87728e+00 1939 2014 5 2.62182e+01 1.41514e+00 1963 2014 6 2.95643e+01 1.29852e+00 1945 2014 7 3.07348e+01 1.27485e+00 2556 2014 8 3.09761e+01 1.41166e+00 2326 2014 9 2.95942e+01 1.97050e+00 1629 2014 10 2.69911e+01 1.88626e+00 2265 2014 11 2.11795e+01 1.78646e+00 1967 2014 12 1.93787e+01 1.85405e+00 2058 2015 1 1.93307e+01 1.77884e+00 1869 2015 2 1.73685e+01 1.24185e+00 1985 2015 3 2.39011e+01 1.65528e+00 3148 2015 4 2.66850e+01 2.17054e+00 2183 2015 5 2.75401e+01 1.60920e+00 2611 2015 6 3.00926e+01 1.80812e+00 2054 2015 7 3.00460e+01 1.18855e+00 1880 2015 8 3.08675e+01 1.36649e+00 1915 2015 9 2.95171e+01 1.75837e+00 1268 2015 10 2.71116e+01 1.94995e+00 1983 2015 11 2.56354e+01 2.37700e+00 2928 2015 12 2.28181e+01 1.80751e+00 1886 2016 1 1.88978e+01 1.99117e+00 628 2016 2 1.86605e+01 1.77922e+00 1945 2016 3 2.17276e+01 2.32375e+00 1639 2016 4 2.45631e+01 1.55124e+00 2587 2016 5 2.73940e+01 1.88171e+00 2678 2016 6 2.99519e+01 1.74655e+00 2051 2016 7 3.10092e+01 1.74110e+00 1989 2016 8 3.03093e+01 1.16839e+00 1890 2016 9 2.95248e+01 1.69456e+00 2136 2016 10 2.65838e+01 2.35145e+00 2235 2016 11 2.25626e+01 1.80959e+00 2647 2016 12 2.23224e+01 1.13368e+00 2502 2017 1 2.01967e+01 1.66642e+00 1971 2017 2 2.12248e+01 1.44985e+00 2403 2017 3 2.18290e+01 1.93313e+00 2883 2017 4 2.46389e+01 1.87881e+00 1681 2017 5 2.73792e+01 1.75724e+00 2937 2017 6 2.94744e+01 2.05008e+00 1262 2017 7 3.01783e+01 1.39980e+00 1756 2017 8 3.05591e+01 1.80037e+00 1887 2017 9 2.98111e+01 1.57105e+00 2535 2017 10 2.63657e+01 2.69222e+00 1883 2017 11 2.30893e+01 1.12250e+00 3283 2017 12 2.18887e+01 1.95962e+00 3202 2018 1 1.68739e+01 1.65009e+00 1253 2018 2 2.27504e+01 2.52143e+00 2573 2018 3 2.13944e+01 2.06381e+00 2798 2018 4 2.51398e+01 1.31811e+00 2174 2018 5 2.51574e+01 1.37517e+00 1300 2018 6 2.94091e+01 1.87108e+00 2215 2018 7 3.05829e+01 1.35269e+00 2154 2018 8 3.02959e+01 1.40043e+00 2008 2018 9 3.00431e+01 1.67911e+00 2021 2018 10 2.76246e+01 1.62969e+00 2507 2018 11 2.49314e+01 1.88881e+00 2128 2018 12 1.99385e+01 1.74097e+00 1789 2019 1 1.93629e+01 2.40358e+00 2307 2019 2 2.18900e+01 2.58303e+00 2180 2019 3 2.25643e+01 1.59598e+00 2537 2019 4 2.51266e+01 1.39785e+00 2563 2019 5 2.83682e+01 1.21218e+00 2328 2019 6 3.07996e+01 1.27600e+00 2617 2019 7 3.03746e+01 1.68562e+00 2273 2019 8 3.01291e+01 9.72017e-01 1320 2019 9 2.89904e+01 1.57305e+00 2533 2019 10 2.80159e+01 9.48983e-01 2004 2019 11 2.34819e+01 2.74204e+00 2143 2019 12 2.13215e+01 1.30479e+00 2018 2020 1 2.05032e+01 1.82935e+00 2874 2020 2 2.07846e+01 2.21118e+00 2513 2020 3 2.38701e+01 3.19959e+00 3080 2020 4 2.63754e+01 1.10315e+00 2143 2020 5 2.67039e+01 1.62786e+00 2427 2020 6 3.04226e+01 1.23761e+00 1950 2020 7 3.05908e+01 1.44178e+00 2017 2020 8 3.11163e+01 1.18824e+00 1406 2020 9 2.97878e+01 1.17824e+00 1743 2020 10 2.78238e+01 1.09914e+00 1680 2020 11 2.41685e+01 1.79559e+00 2504 2020 12 1.89257e+01 1.82886e+00 2656 2021 1 1.91779e+01 1.71016e+00 2497 2021 2 2.13455e+01 2.67959e+00 2789 2021 3 2.29037e+01 2.25799e+00 2888 2021 4 2.50449e+01 1.98939e+00 3437 2021 5 2.76800e+01 1.83279e+00 3245 2021 6 2.85500e+01 1.33365e+00 1111 2021 7 3.01584e+01 1.81894e+00 2382 2021 8 3.04188e+01 1.21058e+00 1411 2021 9 3.02874e+01 1.24720e+00 2082 2021 10 2.85159e+01 1.42530e+00 2583 2021 11 2.14946e+01 1.54071e+00 2595 2021 12 2.20270e+01 1.51006e+00 3295 2022 1 1.99559e+01 2.65275e+00 2526 2022 2 2.00928e+01 2.68889e+00 2372 2022 3 2.34378e+01 1.58323e+00 3727 2022 4 2.52165e+01 1.53056e+00 1816 2022 5 2.84198e+01 1.29501e+00 2893 2022 6 2.96614e+01 1.38650e+00 2354 2022 7 3.10945e+01 1.05404e+00 2391 2022 8 3.11197e+01 1.24260e+00 1983 2022 9 3.07329e+01 1.32495e+00 1767 2022 10 2.59144e+01 1.87258e+00 2616 2022 11 2.47366e+01 1.66561e+00 2166 2022 12 2.21232e+01 2.52462e+00 2597 2023 1 1.93050e+01 1.86185e+00 2876 2023 2 2.26465e+01 1.71612e+00 3223 2023 3 2.41981e+01 2.18837e+00 3519 2023 4 2.69587e+01 1.60450e+00 2109 2023 5 2.84729e+01 1.75734e+00 3759 2023 6 3.00621e+01 1.63203e+00 2419 2023 7 3.17511e+01 1.13549e+00 2090 2023 8 3.12044e+01 1.60823e+00 2001 2023 9 3.08509e+01 1.32644e+00 2329 2023 10 2.59342e+01 1.92817e+00 2631 2023 11 2.33459e+01 1.35740e+00 2155 2023 12 1.96082e+01 1.77292e+00 1052 2024 1 1.88832e+01 1.62586e+00 877 2024 2 1.90106e+01 1.34582e+00 2376 2024 3 2.38872e+01 1.39005e+00 1747 2024 4 2.34801e+01 3.15939e-01 93