YEAR MONTH MEAN STDEV COUNT 2002 1 nan nan 0 2002 2 nan nan 0 2002 3 nan nan 0 2002 4 nan nan 0 2002 5 nan nan 0 2002 6 nan nan 0 2002 7 1.81551e+01 7.48007e+00 658 2002 8 1.37322e+01 6.73980e+00 593 2002 9 5.85107e+00 4.22250e+00 702 2002 10 6.87836e+00 3.64362e+00 782 2002 11 4.53073e+00 2.36010e+00 908 2002 12 9.27647e+00 4.48851e+00 561 2003 1 9.24122e+00 4.40182e+00 724 2003 2 8.85078e+00 3.60998e+00 352 2003 3 1.23013e+01 4.33887e+00 439 2003 4 1.46915e+01 5.39634e+00 293 2003 5 2.38209e+01 6.31902e+00 182 2003 6 1.33703e+01 5.58955e+00 375 2003 7 1.62278e+01 4.78970e+00 274 2003 8 1.58856e+01 8.03567e+00 480 2003 9 4.87533e+00 2.53998e+00 849 2003 10 3.99837e+00 2.59351e+00 664 2003 11 5.39250e+00 3.53804e+00 717 2003 12 4.45902e+00 1.99162e+00 579 2004 1 5.29120e+00 3.36908e+00 531 2004 2 5.72637e+00 2.41259e+00 518 2004 3 1.67525e+01 5.02597e+00 885 2004 4 1.81937e+01 9.15744e+00 310 2004 5 2.01483e+01 7.41486e+00 359 2004 6 2.13483e+01 7.36142e+00 540 2004 7 1.55525e+01 4.81348e+00 174 2004 8 7.13594e+00 2.74804e+00 462 2004 9 6.47000e+00 4.27174e+00 709 2004 10 5.94382e+00 4.24814e+00 680 2004 11 4.41859e+00 4.48625e+00 365 2004 12 5.25043e+00 3.12396e+00 615 2005 1 4.93918e+00 3.09241e+00 564 2005 2 7.52405e+00 2.87172e+00 702 2005 3 1.19726e+01 2.60046e+00 727 2005 4 1.67403e+01 8.95385e+00 213 2005 5 2.07029e+01 6.83430e+00 165 2005 6 1.72121e+01 6.67226e+00 579 2005 7 1.26635e+01 7.92260e+00 241 2005 8 8.23191e+00 5.76666e+00 340 2005 9 5.31660e+00 3.09820e+00 805 2005 10 6.19928e+00 3.77397e+00 883 2005 11 6.53357e+00 3.74682e+00 581 2005 12 6.16745e+00 3.51540e+00 862 2006 1 3.89504e+00 2.56542e+00 527 2006 2 7.20749e+00 1.86174e+00 446 2006 3 6.82619e+00 1.60753e+00 593 2006 4 1.46631e+01 5.53779e+00 490 2006 5 2.36820e+01 5.64210e+00 426 2006 6 2.34999e+01 6.25214e+00 703 2006 7 1.05502e+01 5.05783e+00 282 2006 8 1.38254e+01 4.43349e+00 135 2006 9 8.08912e+00 6.30385e+00 780 2006 10 4.33606e+00 3.73233e+00 546 2006 11 3.70267e+00 2.29715e+00 955 2006 12 5.63627e+00 3.73061e+00 542 2007 1 5.46315e+00 2.79151e+00 723 2007 2 1.09372e+01 4.06486e+00 853 2007 3 9.77781e+00 2.76657e+00 551 2007 4 9.63139e+00 2.82809e+00 181 2007 5 1.54510e+01 4.02914e+00 140 2007 6 1.65151e+01 7.60158e+00 373 2007 7 1.80056e+01 4.55713e+00 56 2007 8 1.90434e+01 6.83417e+00 664 2007 9 6.47996e+00 3.54592e+00 922 2007 10 3.36231e+00 2.60372e+00 827 2007 11 5.20180e+00 4.41209e+00 790 2007 12 1.88669e+00 1.85701e+00 597 2008 1 4.87749e+00 3.98488e+00 448 2008 2 5.22139e+00 1.97920e+00 643 2008 3 9.80449e+00 3.54321e+00 621 2008 4 1.91319e+01 7.95370e+00 287 2008 5 3.98978e+00 3.13861e+00 131 2008 6 7.45533e+00 2.03201e+00 61 2008 7 nan nan 0 2008 8 1.29695e+01 2.97606e+00 138 2008 9 4.74984e+00 4.54707e+00 105 2008 10 3.41395e+00 2.66151e+00 614 2008 11 3.09069e+00 2.10762e+00 595 2008 12 8.19326e+00 4.12855e+00 1051 2009 1 7.17271e+00 2.27959e+00 742 2009 2 6.11681e+00 1.98126e+00 443 2009 3 8.23286e+00 1.99393e+00 361 2009 4 2.09119e+01 7.55397e+00 255 2009 5 2.01248e+01 5.88381e+00 272 2009 6 1.91835e+01 5.19013e+00 128 2009 7 nan nan 0 2009 8 2.08159e+01 5.46902e+00 157 2009 9 1.08978e+01 4.87907e+00 546 2009 10 6.55049e+00 2.18501e+00 448 2009 11 3.33525e+00 2.02609e+00 624 2009 12 4.48698e+00 2.88922e+00 768 2010 1 4.21836e+00 2.23923e+00 736 2010 2 8.30583e+00 3.25379e+00 384 2010 3 1.46073e+01 5.55767e+00 503 2010 4 1.19806e+01 3.02550e+00 145 2010 5 1.98185e+01 7.38885e+00 238 2010 6 1.84883e+01 3.33200e+00 64 2010 7 1.76235e+01 7.76343e+00 360 2010 8 1.15872e+01 4.54312e+00 315 2010 9 6.18268e+00 3.10139e+00 381 2010 10 8.31545e+00 6.85273e+00 927 2010 11 6.38039e+00 4.39321e+00 1279 2010 12 3.15739e+00 2.13244e+00 668 2011 1 5.32947e+00 2.42488e+00 704 2011 2 8.92665e+00 3.90341e+00 405 2011 3 9.41911e+00 2.33817e+00 605 2011 4 1.15499e+01 3.88093e+00 369 2011 5 1.65131e+01 5.31100e+00 341 2011 6 1.16651e+01 6.54890e+00 189 2011 7 2.11380e+01 8.09506e+00 370 2011 8 1.44298e+01 6.92453e+00 363 2011 9 7.03633e+00 3.05808e+00 731 2011 10 7.24483e+00 3.33256e+00 900 2011 11 5.38860e+00 3.06586e+00 640 2011 12 7.91821e+00 3.75944e+00 811 2012 1 8.96539e+00 3.69347e+00 872 2012 2 7.07043e+00 3.82189e+00 637 2012 3 9.93366e+00 2.33844e+00 614 2012 4 1.48432e+01 4.82087e+00 319 2012 5 1.53964e+01 8.77101e+00 64 2012 6 7.74848e+00 2.76529e+00 256 2012 7 2.38886e+01 6.36896e+00 285 2012 8 1.86443e+01 8.98483e+00 233 2012 9 8.11647e+00 4.67030e+00 556 2012 10 9.34222e+00 5.69735e+00 448 2012 11 6.54017e+00 3.34469e+00 634 2012 12 4.60000e+00 3.29593e+00 361 2013 1 4.80952e+00 3.68564e+00 775 2013 2 1.05960e+01 4.70839e+00 733 2013 3 1.12692e+01 3.93392e+00 524 2013 4 1.23155e+01 5.64221e+00 136 2013 5 1.47227e+01 5.44089e+00 256 2013 6 1.23949e+01 4.40469e+00 272 2013 7 2.73890e+01 7.56600e+00 371 2013 8 2.11988e+01 8.51229e+00 475 2013 9 1.14664e+01 5.89764e+00 803 2013 10 5.82607e+00 4.47006e+00 902 2013 11 7.53109e+00 4.44650e+00 637 2013 12 5.59645e+00 4.64701e+00 883 2014 1 9.14193e+00 4.58987e+00 581 2014 2 1.07160e+01 1.99482e+00 604 2014 3 1.57428e+01 4.80167e+00 598 2014 4 1.64859e+01 1.09242e+01 358 2014 5 2.16580e+01 7.46534e+00 278 2014 6 1.15473e+01 5.26903e+00 475 2014 7 1.40790e+01 9.26674e+00 404 2014 8 1.90412e+01 8.89473e+00 378 2014 9 1.03261e+01 7.39614e+00 800 2014 10 5.61408e+00 3.45540e+00 959 2014 11 4.32069e+00 3.43015e+00 835 2014 12 4.79838e+00 2.25875e+00 1047 2015 1 7.35536e+00 1.83857e+00 688 2015 2 7.04075e+00 2.68275e+00 489 2015 3 1.16273e+01 2.26523e+00 543 2015 4 9.97816e+00 4.73356e+00 443 2015 5 2.35468e+01 6.38793e+00 237 2015 6 1.44777e+01 6.81135e+00 508 2015 7 1.57260e+01 6.39649e+00 286 2015 8 1.41890e+01 7.97024e+00 516 2015 9 7.17425e+00 3.42380e+00 551 2015 10 3.71517e+00 2.93021e+00 568 2015 11 1.69187e+00 1.72415e+00 880 2015 12 2.18921e+00 1.98865e+00 826 2016 1 2.87788e+00 2.30278e+00 832 2016 2 5.58064e+00 1.85931e+00 1151 2016 3 8.01386e+00 3.66914e+00 620 2016 4 1.86956e+01 9.04910e+00 619 2016 5 1.71608e+01 6.85191e+00 552 2016 6 1.14580e+01 4.87480e+00 288 2016 7 1.87313e+01 9.10740e+00 406 2016 8 2.29290e+01 6.43121e+00 544 2016 9 8.76291e+00 6.59029e+00 684 2016 10 7.73968e+00 5.17660e+00 1158 2016 11 4.39000e+00 2.80166e+00 720 2016 12 4.63886e+00 3.46091e+00 634 2017 1 4.55232e+00 3.63265e+00 552 2017 2 9.77353e+00 2.51210e+00 448 2017 3 1.47100e+01 4.55148e+00 811 2017 4 1.73946e+01 7.18317e+00 143 2017 5 1.53145e+01 5.54377e+00 143 2017 6 1.62611e+01 5.57303e+00 657 2017 7 1.75805e+01 7.72763e+00 416 2017 8 1.11812e+01 5.63501e+00 368 2017 9 5.43848e+00 3.40830e+00 279 2017 10 5.58996e+00 7.05721e+00 734 2017 11 1.64299e+00 1.59122e+00 699 2017 12 1.79319e+00 2.26289e+00 895 2018 1 6.11216e+00 3.56110e+00 1024 2018 2 4.38272e+00 3.47798e+00 466 2018 3 1.11447e+01 4.89880e+00 824 2018 4 8.09768e+00 4.73640e+00 218 2018 5 1.46983e+01 5.02731e+00 319 2018 6 1.22781e+01 8.49777e+00 316 2018 7 2.33143e+01 6.61571e+00 408 2018 8 1.66246e+01 7.18976e+00 551 2018 9 8.92016e+00 5.97556e+00 510 2018 10 3.04351e+00 3.19784e+00 287 2018 11 2.65354e+00 1.72641e+00 422 2018 12 6.38267e+00 1.62921e+00 773 2019 1 4.93961e+00 1.22851e+00 328 2019 2 1.00239e+01 1.84569e+00 701 2019 3 1.36711e+01 4.14593e+00 941 2019 4 1.57140e+01 8.69711e+00 421 2019 5 2.10667e+01 5.39520e+00 536 2019 6 2.39395e+01 6.88450e+00 787 2019 7 1.86021e+01 1.08624e+01 649 2019 8 2.27201e+01 6.78799e+00 692 2019 9 8.12291e+00 7.94097e+00 897 2019 10 6.47760e+00 5.22805e+00 663 2019 11 4.33321e+00 3.26699e+00 632 2019 12 5.30224e+00 2.56845e+00 471 2020 1 5.29646e+00 3.26966e+00 780 2020 2 6.27451e+00 2.99574e+00 769 2020 3 1.19455e+01 4.87655e+00 419 2020 4 2.44258e+01 4.69576e+00 215 2020 5 1.53144e+01 7.39918e+00 519 2020 6 1.03318e+01 4.75168e+00 788 2020 7 2.42931e+01 8.43351e+00 681 2020 8 7.42517e+00 3.99924e+00 185 2020 9 9.15400e+00 4.26303e+00 726 2020 10 6.11507e+00 4.52114e+00 1370 2020 11 5.14386e+00 4.66264e+00 454 2020 12 2.43276e+00 1.59930e+00 682 2021 1 4.26679e+00 1.85835e+00 1085 2021 2 5.59559e+00 2.42113e+00 843 2021 3 5.90915e+00 3.90794e+00 534 2021 4 1.84345e+01 9.51954e+00 565 2021 5 2.31112e+01 7.44498e+00 448 2021 6 1.24274e+01 7.26147e+00 460 2021 7 2.35137e+01 7.46417e+00 492 2021 8 1.25855e+01 5.47312e+00 567 2021 9 6.05072e+00 3.67622e+00 830 2021 10 6.81244e+00 5.43222e+00 1334 2021 11 5.82872e+00 5.11462e+00 799 2021 12 4.90044e+00 2.71879e+00 506 2022 1 4.81967e+00 2.86526e+00 780 2022 2 1.24077e+01 4.21901e+00 821 2022 3 8.58746e+00 3.13737e+00 277 2022 4 9.09544e+00 2.57026e+00 25 2022 5 1.39545e+01 3.89919e+00 243 2022 6 2.41464e+01 5.98444e+00 375 2022 7 2.91476e+01 7.37646e+00 225 2022 8 1.44423e+01 8.39540e+00 393 2022 9 8.60328e+00 6.88655e+00 597 2022 10 6.25379e+00 4.16696e+00 616 2022 11 7.89340e+00 4.59063e+00 503 2022 12 5.75857e+00 3.86615e+00 819 2023 1 1.10730e+01 2.53693e+00 431 2023 2 8.15515e+00 4.96155e+00 576 2023 3 1.78756e+01 5.48999e+00 850 2023 4 1.85755e+01 7.95755e+00 832 2023 5 1.87520e+01 6.74770e+00 452 2023 6 2.34580e+01 4.56956e+00 908 2023 7 2.13260e+01 5.86380e+00 789 2023 8 1.27568e+01 6.05907e+00 373 2023 9 5.26569e+00 4.35602e+00 780 2023 10 5.00626e+00 4.91637e+00 709 2023 11 2.57114e+00 2.96680e+00 504 2023 12 5.98015e+00 4.07522e+00 835 2024 1 7.13640e+00 1.79579e+00 865 2024 2 7.63228e+00 1.98348e+00 1065 2024 3 9.95464e+00 2.94783e+00 866 2024 4 1.18806e+01 1.75116e+00 188