YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.79798e+00 1.20094e-01 42 2000 3 2.40720e+00 5.63985e-01 143 2000 4 2.54291e+00 3.69429e-01 201 2000 5 3.58146e+00 4.24558e-01 268 2000 6 4.89676e+00 9.68250e-01 102 2000 7 1.22294e+01 9.90498e-01 132 2000 8 1.68131e+01 1.32552e+00 709 2000 9 1.36944e+01 1.83446e+00 624 2000 10 1.14012e+01 7.31434e-01 680 2000 11 9.70875e+00 1.45820e+00 212 2000 12 4.92398e+00 1.31536e-01 152 2001 1 2.47598e+00 3.49252e-01 112 2001 2 nan nan 0 2001 3 1.00183e+00 2.13386e-01 344 2001 4 1.42431e+00 3.04875e-01 283 2001 5 3.08756e+00 2.51995e-01 197 2001 6 4.90089e+00 4.92996e-02 56 2001 7 1.21311e+01 3.65819e+00 143 2001 8 1.74001e+01 8.73317e-01 1313 2001 9 1.47601e+01 2.11857e+00 865 2001 10 9.17897e+00 2.17892e+00 316 2001 11 7.35428e+00 6.37495e-01 328 2001 12 5.19285e+00 2.24593e-01 172 2002 1 3.51109e+00 8.86508e-02 32 2002 2 2.58263e+00 9.84910e-01 251 2002 3 1.68574e+00 7.40608e-01 176 2002 4 2.06449e+00 8.56832e-01 352 2002 5 2.82846e+00 3.86946e-01 805 2002 6 nan nan 0 2002 7 1.43456e+01 1.26301e+00 168 2002 8 1.70371e+01 1.19607e+00 2077 2002 9 1.57120e+01 1.04169e+00 1688 2002 10 9.15771e+00 2.14334e+00 240 2002 11 4.83798e+00 2.99386e-01 387 2002 12 3.76869e+00 4.30463e-01 612 2003 1 2.45853e+00 6.68852e-01 414 2003 2 1.16727e-01 1.63444e-01 55 2003 3 4.55098e-01 1.60294e-01 102 2003 4 1.04626e+00 4.59335e-01 500 2003 5 2.17873e+00 4.91472e-01 429 2003 6 5.07221e+00 8.33036e-01 322 2003 7 9.45885e+00 1.63759e+00 113 2003 8 1.51139e+01 1.48647e+00 927 2003 9 1.43850e+01 1.64483e+00 932 2003 10 8.21052e+00 7.54370e-01 717 2003 11 5.26548e+00 5.22788e-01 394 2003 12 4.16196e+00 4.91057e-01 803 2004 1 nan nan 0 2004 2 9.63691e-01 5.06843e-01 149 2004 3 9.05811e-01 4.25137e-01 265 2004 4 1.80260e+00 6.31273e-01 893 2004 5 2.76458e+00 6.36315e-01 492 2004 6 5.03701e+00 1.02155e+00 349 2004 7 1.01002e+01 2.39693e+00 564 2004 8 1.38964e+01 2.08510e+00 1735 2004 9 1.32545e+01 6.18529e-01 1421 2004 10 8.99693e+00 1.40719e+00 589 2004 11 6.53130e+00 6.18919e-01 887 2004 12 5.73357e+00 1.11410e-01 7 2005 1 2.91013e+00 5.89171e-01 261 2005 2 1.88395e+00 2.60082e-01 176 2005 3 1.20564e+00 6.28920e-01 571 2005 4 2.64768e+00 4.01123e-01 1026 2005 5 3.34042e+00 4.69284e-01 379 2005 6 9.33801e+00 2.77536e+00 221 2005 7 1.59000e+01 1.18130e+00 679 2005 8 1.80648e+01 6.98459e-01 2861 2005 9 1.78800e+01 7.64585e-01 3023 2005 10 1.12350e+01 1.62006e+00 933 2005 11 7.53575e+00 1.45034e+00 306 2005 12 nan nan 0 2006 1 3.32413e+00 3.55857e-01 556 2006 2 2.33145e+00 1.34071e+00 86 2006 3 1.85415e+00 8.08645e-01 920 2006 4 2.97500e+00 4.04439e-01 1350 2006 5 3.94417e+00 1.83294e+00 488 2006 6 1.01050e+01 2.35132e+00 556 2006 7 1.51995e+01 2.38228e+00 1148 2006 8 1.74828e+01 1.18480e+00 3012 2006 9 1.71290e+01 1.49114e+00 1956 2006 10 1.20537e+01 2.26952e+00 953 2006 11 5.34401e+00 1.81300e+00 152 2006 12 4.32360e+00 8.95765e-01 473 2007 1 3.76628e+00 5.45671e-01 203 2007 2 nan nan 0 2007 3 1.68518e+00 5.35688e-01 276 2007 4 2.09867e+00 6.81897e-01 701 2007 5 3.38299e+00 3.13230e-01 499 2007 6 5.40638e+00 1.68608e+00 369 2007 7 1.06391e+01 3.31662e+00 311 2007 8 1.62451e+01 1.63572e+00 1947 2007 9 1.31388e+01 3.02704e+00 1307 2007 10 9.42795e+00 1.04032e+00 811 2007 11 5.85768e+00 1.02240e+00 407 2007 12 4.37812e+00 2.89784e-01 69 2008 1 2.23798e+00 1.32470e+00 178 2008 2 1.51547e+00 3.51076e-01 190 2008 3 9.58678e-01 3.13958e-01 121 2008 4 1.41142e+00 6.52369e-01 663 2008 5 2.69686e+00 8.35618e-01 749 2008 6 6.21458e+00 7.39081e-01 72 2008 7 1.22571e+01 1.90412e+00 336 2008 8 1.49166e+01 1.16598e+00 2861 2008 9 1.49913e+01 9.22972e-01 1594 2008 10 1.04410e+01 9.44660e-01 1170 2008 11 5.19987e+00 1.95151e+00 77 2008 12 2.99813e+00 9.52935e-02 16 2009 1 1.03500e+00 0.00000e+00 1 2009 2 5.48740e-01 3.25866e-01 127 2009 3 5.17359e-01 5.26890e-01 248 2009 4 1.08841e+00 2.38658e-01 506 2009 5 2.88159e+00 8.33504e-01 1078 2009 6 3.86741e+00 3.80553e-01 293 2009 7 1.07922e+01 1.54415e+00 381 2009 8 1.36508e+01 1.66178e+00 1495 2009 9 1.62217e+01 1.11840e+00 2833 2009 10 1.00412e+01 1.36566e+00 557 2009 11 6.86461e+00 5.53124e-01 949 2009 12 2.89128e+00 1.97188e+00 195 2010 1 3.12643e+00 2.89848e-01 305 2010 2 1.97914e+00 3.69761e-01 406 2010 3 2.39603e+00 4.67121e-01 809 2010 4 3.08262e+00 6.91879e-01 1122 2010 5 4.78616e+00 2.60173e+00 593 2010 6 9.13685e+00 1.50787e+00 486 2010 7 1.68323e+01 1.10922e+00 2319 2010 8 1.87115e+01 1.13466e+00 2449 2010 9 1.44533e+01 1.49077e+00 2659 2010 10 1.27283e+01 8.22878e-01 1972 2010 11 8.26291e+00 9.86931e-01 635 2010 12 3.91883e+00 1.61728e-01 253 2011 1 2.01500e+00 0.00000e+00 2 2011 2 1.67960e+00 1.09017e+00 112 2011 3 1.07500e+00 5.60058e-01 280 2011 4 1.74553e+00 7.15602e-01 1190 2011 5 3.65255e+00 1.44453e+00 919 2011 6 4.55222e+00 4.14950e-01 399 2011 7 1.18841e+01 1.73912e+00 271 2011 8 1.59175e+01 1.65834e+00 1866 2011 9 1.54301e+01 1.23148e+00 1824 2011 10 1.05967e+01 2.66794e+00 905 2011 11 7.45613e+00 1.26905e+00 1029 2011 12 4.15010e+00 9.11798e-01 353 2012 1 3.35706e+00 6.27674e-01 34 2012 2 2.48625e+00 5.94255e-01 814 2012 3 2.88929e+00 2.32829e-01 211 2012 4 2.93406e+00 5.13706e-01 1620 2012 5 4.32626e+00 4.61411e-01 605 2012 6 1.05194e+01 2.60615e+00 863 2012 7 1.86695e+01 1.26760e+00 2677 2012 8 1.82457e+01 9.92287e-01 3155 2012 9 1.77813e+01 2.71860e+00 1799 2012 10 1.11682e+01 2.15277e+00 694 2012 11 5.91178e+00 1.18870e+00 520 2012 12 4.98260e+00 2.83461e-01 73 2013 1 3.11209e+00 8.20910e-01 418 2013 2 1.90527e+00 1.57861e-01 112 2013 3 1.95304e+00 1.56025e-01 1035 2013 4 1.87340e+00 6.87282e-01 663 2013 5 3.35442e+00 4.02786e-01 580 2013 6 4.16888e+00 5.62506e-01 160 2013 7 1.22284e+01 2.79308e+00 697 2013 8 1.21737e+01 1.58871e+00 1338 2013 9 1.35618e+01 6.00043e-01 1700 2013 10 1.31650e+01 1.67224e+00 919 2013 11 5.79248e+00 5.96801e-01 111 2013 12 3.09758e+00 1.20272e-01 66 2014 1 2.14000e+00 0.00000e+00 1 2014 2 -4.13462e-01 1.13381e-01 13 2014 3 9.67500e-01 2.16506e-02 8 2014 4 9.75000e-02 2.45184e-01 180 2014 5 1.09147e+00 8.43437e-01 187 2014 6 4.34035e+00 4.91958e-01 128 2014 7 6.60847e+00 1.75526e+00 336 2014 8 1.34141e+01 1.36602e+00 453 2014 9 1.08231e+01 2.81075e+00 1019 2014 10 6.69949e+00 5.22489e-01 392 2014 11 5.91856e+00 7.81794e-01 52 2014 12 3.29638e+00 6.63361e-01 228 2015 1 2.39976e+00 7.66948e-02 63 2015 2 nan nan 0 2015 3 3.19316e-01 2.25455e-01 95 2015 4 1.36387e+00 4.35252e-01 648 2015 5 2.59201e+00 2.30680e-01 341 2015 6 3.90625e+00 4.06894e-01 100 2015 7 8.77424e+00 3.41155e+00 258 2015 8 1.47049e+01 1.71363e+00 761 2015 9 1.56268e+01 1.00969e+00 1859 2015 10 1.19990e+01 3.15511e+00 1265 2015 11 6.36264e+00 1.49377e+00 529 2015 12 5.75057e+00 1.92072e-01 271 2016 1 3.48138e+00 6.44212e-01 400 2016 2 2.20240e+00 8.78194e-02 25 2016 3 2.18004e+00 6.79455e-01 1001 2016 4 2.44716e+00 6.35067e-01 745 2016 5 3.26266e+00 4.38042e-01 699 2016 6 5.33404e+00 1.14164e+00 267 2016 7 1.56367e+01 3.05125e+00 1545 2016 8 1.89070e+01 1.26874e+00 3037 2016 9 1.75584e+01 1.24094e+00 2518 2016 10 1.42282e+01 1.99436e+00 1427 2016 11 8.33512e+00 1.93374e+00 861 2016 12 4.37737e+00 3.40439e-01 192 2017 1 2.50521e+00 8.46540e-01 120 2017 2 2.32221e+00 3.44358e-01 68 2017 3 1.84445e+00 4.81379e-01 494 2017 4 2.45915e+00 5.58808e-01 500 2017 5 3.18206e+00 5.28450e-01 981 2017 6 4.03016e+00 4.70104e-01 93 2017 7 1.45765e+01 2.62766e+00 268 2017 8 1.35629e+01 1.36875e+00 1986 2017 9 1.39556e+01 6.70964e-01 1492 2017 10 1.26668e+01 1.52348e+00 1467 2017 11 4.80230e+00 5.18034e-01 74 2017 12 3.99698e+00 2.08910e-01 222 2018 1 2.26189e+00 2.79013e-01 45 2018 2 1.60216e-01 2.02773e-01 162 2018 3 9.21429e-02 3.83675e-01 385 2018 4 1.05955e+00 3.05960e-01 540 2018 5 3.01703e+00 6.97380e-01 402 2018 6 4.45101e+00 7.87575e-01 233 2018 7 1.22727e+01 1.85090e+00 259 2018 8 1.52903e+01 1.22983e+00 1170 2018 9 1.39170e+01 1.40015e+00 934 2018 10 6.31504e+00 1.04158e+00 718 2018 11 5.08110e+00 1.11440e+00 100 2018 12 3.82968e+00 2.77238e-01 424 2019 1 3.22557e+00 4.02208e-01 184 2019 2 3.18182e-01 1.79312e-01 33 2019 3 6.47613e-01 1.57486e-01 243 2019 4 1.18282e+00 7.14146e-01 575 2019 5 2.72071e+00 7.67213e-01 638 2019 6 4.28281e+00 1.21856e+00 395 2019 7 1.27062e+01 2.66063e+00 590 2019 8 1.53282e+01 9.76203e-01 4449 2019 9 1.38940e+01 9.57697e-01 1731 2019 10 9.55903e+00 1.54111e+00 1756 2019 11 4.93057e+00 3.36274e-01 265 2019 12 3.29296e+00 7.94889e-01 524 2020 1 1.90492e+00 5.24714e-01 61 2020 2 1.83936e+00 4.53759e-01 1062 2020 3 1.59807e+00 4.18201e-01 1068 2020 4 2.07235e+00 3.75904e-01 2840 2020 5 3.54177e+00 1.21802e+00 2249 2020 6 6.27943e+00 1.54938e+00 1738 2020 7 1.47936e+01 2.40692e+00 2388 2020 8 1.60672e+01 1.78958e+00 2673 2020 9 1.30484e+01 1.17528e+00 2342 2020 10 9.89546e+00 1.77013e+00 711 2020 11 6.62163e+00 1.17914e+00 1159 2020 12 4.68484e+00 3.34838e-01 306 2021 1 3.38716e+00 4.37752e-01 823 2021 2 1.71841e+00 6.88982e-01 427 2021 3 1.76561e+00 4.91060e-01 1991 2021 4 2.59578e+00 5.86763e-01 1489 2021 5 3.94330e+00 1.09139e+00 2713 2021 6 7.46533e+00 1.69788e+00 1324 2021 7 1.48307e+01 2.29279e+00 4036 2021 8 1.77643e+01 1.35099e+00 4821 2021 9 1.66170e+01 1.40733e+00 3102 2021 10 1.53686e+01 1.48137e+00 2041 2021 11 9.13346e+00 1.73499e+00 1006 2021 12 4.85566e+00 4.32096e-01 518 2022 1 2.66265e+00 7.02310e-01 153 2022 2 9.97026e-01 1.38825e-01 116 2022 3 7.62278e-01 3.34582e-01 630 2022 4 1.66623e+00 1.00098e+00 559 2022 5 3.72118e+00 2.36451e+00 1917 2022 6 5.46801e+00 2.45620e+00 1828 2022 7 1.05424e+01 2.81024e+00 1849 2022 8 1.54475e+01 2.34637e+00 3328 2022 9 1.48957e+01 1.63793e+00 3588 2022 10 8.73373e+00 1.83817e+00 1776 2022 11 6.31268e+00 1.62601e+00 818 2022 12 4.25981e+00 2.38533e-01 157 2023 1 2.59381e+00 5.30488e-01 388 2023 2 1.81853e+00 4.39451e-01 1031 2023 3 1.65626e+00 4.27707e-01 1337 2023 4 2.84681e+00 1.21016e+00 1313 2023 5 3.94054e+00 9.09646e-01 2006 2023 6 6.28308e+00 1.68988e+00 1697 2023 7 1.29049e+01 2.52693e+00 2756 2023 8 1.51256e+01 1.29336e+00 3856 2023 9 1.48911e+01 1.38458e+00 3086 2023 10 1.21183e+01 2.96051e+00 750 2023 11 6.89169e+00 8.49195e-01 745 2023 12 4.68147e+00 3.74022e-01 814 2024 1 3.31746e+00 5.82354e-01 173 2024 2 2.48595e+00 4.95488e-01 901 2024 3 2.36896e+00 4.50297e-01 1432 2024 4 2.21440e+00 3.80933e-01 267