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 6.20186e+00 1.28365e+00 658 2002 8 5.42391e+00 1.15066e+00 593 2002 9 3.92493e+00 9.43045e-01 702 2002 10 4.20496e+00 7.25571e-01 782 2002 11 3.73756e+00 5.27589e-01 908 2002 12 4.65484e+00 8.24569e-01 561 2003 1 4.64178e+00 8.32212e-01 724 2003 2 4.58218e+00 7.11428e-01 352 2003 3 5.19855e+00 7.55548e-01 439 2003 4 5.61081e+00 8.98141e-01 293 2003 5 7.15332e+00 1.08888e+00 182 2003 6 5.37950e+00 9.49971e-01 375 2003 7 5.86172e+00 8.03766e-01 274 2003 8 5.78910e+00 1.39062e+00 480 2003 9 3.80751e+00 5.67194e-01 849 2003 10 3.55580e+00 6.85236e-01 664 2003 11 3.89208e+00 7.31346e-01 717 2003 12 3.73352e+00 4.59450e-01 579 2004 1 3.84260e+00 7.76451e-01 531 2004 2 4.00439e+00 5.12675e-01 518 2004 3 5.95706e+00 8.36834e-01 885 2004 4 6.21332e+00 1.58610e+00 310 2004 5 6.54792e+00 1.29235e+00 359 2004 6 6.72995e+00 1.26082e+00 540 2004 7 5.74487e+00 8.14429e-01 174 2004 8 4.28810e+00 5.31091e-01 462 2004 9 4.08604e+00 8.75062e-01 709 2004 10 3.97990e+00 8.68090e-01 680 2004 11 3.48895e+00 1.10302e+00 365 2004 12 3.84631e+00 7.25875e-01 615 2005 1 3.77027e+00 7.38820e-01 564 2005 2 4.35857e+00 5.57046e-01 702 2005 3 5.16196e+00 4.37385e-01 727 2005 4 5.95589e+00 1.51954e+00 213 2005 5 6.62450e+00 1.15058e+00 165 2005 6 6.02978e+00 1.12409e+00 579 2005 7 5.20748e+00 1.39898e+00 241 2005 8 4.37102e+00 1.17379e+00 340 2005 9 3.86982e+00 7.05563e-01 805 2005 10 4.03704e+00 8.16078e-01 883 2005 11 4.13739e+00 7.34640e-01 581 2005 12 4.04909e+00 7.47878e-01 862 2006 1 3.57129e+00 5.81870e-01 527 2006 2 4.32075e+00 3.55549e-01 446 2006 3 4.24852e+00 3.30177e-01 593 2006 4 5.59934e+00 9.29237e-01 490 2006 5 7.13057e+00 9.69963e-01 426 2006 6 7.10532e+00 1.07960e+00 703 2006 7 4.89034e+00 8.77417e-01 282 2006 8 5.45952e+00 7.50903e-01 135 2006 9 4.33492e+00 1.23332e+00 780 2006 10 3.44697e+00 1.09109e+00 546 2006 11 3.51424e+00 5.88447e-01 955 2006 12 3.80838e+00 1.04146e+00 542 2007 1 3.93391e+00 5.93281e-01 723 2007 2 4.97420e+00 6.95766e-01 853 2007 3 4.78323e+00 4.79404e-01 551 2007 4 4.75481e+00 4.96382e-01 181 2007 5 5.73918e+00 6.71622e-01 140 2007 6 5.90110e+00 1.29727e+00 373 2007 7 6.16368e+00 7.57134e-01 56 2007 8 6.34542e+00 1.16077e+00 664 2007 9 4.13132e+00 7.05348e-01 922 2007 10 3.39043e+00 6.80349e-01 827 2007 11 3.72463e+00 1.05411e+00 790 2007 12 2.89369e+00 6.75146e-01 597 2008 1 3.67112e+00 9.70195e-01 448 2008 2 3.90675e+00 4.43416e-01 643 2008 3 4.76680e+00 6.57582e-01 621 2008 4 6.37900e+00 1.38744e+00 287 2008 5 3.43635e+00 9.47139e-01 131 2008 6 4.36505e+00 3.86067e-01 61 2008 7 nan nan 0 2008 8 5.32750e+00 4.98123e-01 138 2008 9 3.70707e+00 9.08502e-01 105 2008 10 3.36874e+00 7.50909e-01 614 2008 11 3.33570e+00 6.06997e-01 595 2008 12 4.45340e+00 7.88351e-01 1051 2009 1 4.30563e+00 4.41111e-01 742 2009 2 4.09958e+00 4.11529e-01 443 2009 3 4.51239e+00 3.60661e-01 361 2009 4 6.67608e+00 1.30427e+00 255 2009 5 6.52386e+00 9.92164e-01 272 2009 6 6.35453e+00 8.64458e-01 128 2009 7 nan nan 0 2009 8 6.63629e+00 9.25432e-01 157 2009 9 4.95880e+00 8.35490e-01 546 2009 10 4.18853e+00 4.18966e-01 448 2009 11 3.42903e+00 5.41241e-01 624 2009 12 3.64933e+00 7.66611e-01 768 2010 1 3.66425e+00 5.18663e-01 736 2010 2 4.50611e+00 5.93782e-01 384 2010 3 5.59445e+00 9.33367e-01 503 2010 4 5.15817e+00 5.18727e-01 145 2010 5 6.48580e+00 1.26486e+00 238 2010 6 6.24034e+00 5.49292e-01 64 2010 7 6.09236e+00 1.32358e+00 360 2010 8 5.07815e+00 7.84306e-01 315 2010 9 4.09136e+00 5.99269e-01 381 2010 10 4.31397e+00 1.41115e+00 927 2010 11 4.06232e+00 9.00752e-01 1279 2010 12 3.33789e+00 6.45431e-01 668 2011 1 3.91904e+00 5.17850e-01 704 2011 2 4.59465e+00 7.46264e-01 405 2011 3 4.72250e+00 4.11354e-01 605 2011 4 5.08513e+00 6.52305e-01 369 2011 5 5.91096e+00 8.87550e-01 341 2011 6 5.06140e+00 1.13720e+00 189 2011 7 6.71171e+00 1.39235e+00 370 2011 8 5.56528e+00 1.17614e+00 363 2011 9 4.25826e+00 6.00556e-01 731 2011 10 4.28939e+00 6.59417e-01 900 2011 11 3.88674e+00 7.00308e-01 640 2011 12 4.41057e+00 7.23871e-01 811 2012 1 4.58943e+00 7.63842e-01 872 2012 2 4.18246e+00 9.02796e-01 637 2012 3 4.80879e+00 4.32918e-01 614 2012 4 5.63790e+00 8.03991e-01 319 2012 5 5.67760e+00 1.53216e+00 64 2012 6 4.40984e+00 5.10388e-01 256 2012 7 7.17503e+00 1.10105e+00 285 2012 8 6.27062e+00 1.54526e+00 233 2012 9 4.41071e+00 9.19783e-01 556 2012 10 4.66272e+00 1.00274e+00 448 2012 11 4.10639e+00 7.83176e-01 634 2012 12 3.68565e+00 7.64286e-01 361 2013 1 3.68700e+00 8.86579e-01 775 2013 2 4.88511e+00 8.63675e-01 733 2013 3 5.01500e+00 7.25583e-01 524 2013 4 5.22289e+00 9.70103e-01 136 2013 5 5.61497e+00 9.09627e-01 256 2013 6 5.21655e+00 7.56255e-01 272 2013 7 7.82293e+00 1.36844e+00 371 2013 8 6.71037e+00 1.45356e+00 475 2013 9 5.02437e+00 1.05983e+00 803 2013 10 3.85936e+00 1.06488e+00 902 2013 11 4.32950e+00 8.23406e-01 637 2013 12 3.82775e+00 1.04199e+00 883 2014 1 4.64799e+00 8.04622e-01 581 2014 2 4.95126e+00 3.42561e-01 604 2014 3 5.78637e+00 7.97873e-01 598 2014 4 5.91173e+00 1.95773e+00 358 2014 5 6.79417e+00 1.27427e+00 278 2014 6 5.06069e+00 9.12625e-01 475 2014 7 5.49957e+00 1.66761e+00 404 2014 8 6.36549e+00 1.53316e+00 378 2014 9 4.75195e+00 1.41729e+00 800 2014 10 3.92529e+00 7.57906e-01 959 2014 11 3.59194e+00 8.34861e-01 835 2014 12 3.79792e+00 5.20600e-01 1047 2015 1 4.34778e+00 3.58997e-01 688 2015 2 4.25078e+00 5.95553e-01 489 2015 3 5.10546e+00 3.81830e-01 543 2015 4 4.79342e+00 8.28178e-01 443 2015 5 7.11469e+00 1.10779e+00 237 2015 6 5.58087e+00 1.15739e+00 508 2015 7 5.77214e+00 1.07906e+00 286 2015 8 5.49856e+00 1.37105e+00 516 2015 9 4.26276e+00 7.05097e-01 551 2015 10 3.42220e+00 8.19537e-01 568 2015 11 2.87330e+00 5.74050e-01 880 2015 12 3.04496e+00 6.15964e-01 826 2016 1 3.23239e+00 7.05032e-01 832 2016 2 3.99330e+00 3.86909e-01 1151 2016 3 4.42869e+00 7.11989e-01 620 2016 4 6.28244e+00 1.61032e+00 619 2016 5 6.03527e+00 1.16409e+00 552 2016 6 5.06320e+00 8.21955e-01 288 2016 7 6.31851e+00 1.63285e+00 406 2016 8 7.00754e+00 1.11663e+00 544 2016 9 4.42069e+00 1.35003e+00 684 2016 10 4.31864e+00 1.02342e+00 1158 2016 11 3.63750e+00 7.31179e-01 720 2016 12 3.66315e+00 8.41889e-01 634 2017 1 3.63326e+00 8.69446e-01 552 2017 2 4.78055e+00 4.52367e-01 448 2017 3 5.61693e+00 7.58699e-01 811 2017 4 6.07079e+00 1.20466e+00 143 2017 5 5.70528e+00 9.52171e-01 143 2017 6 5.87193e+00 9.39556e-01 657 2017 7 6.09251e+00 1.30988e+00 416 2017 8 4.98346e+00 1.00077e+00 368 2017 9 3.82042e+00 9.00460e-01 279 2017 10 3.68615e+00 1.46431e+00 734 2017 11 2.79701e+00 6.77514e-01 699 2017 12 2.79205e+00 7.76169e-01 895 2018 1 4.03339e+00 7.61331e-01 1024 2018 2 3.58205e+00 8.76299e-01 466 2018 3 5.00506e+00 8.31326e-01 824 2018 4 4.40661e+00 9.20587e-01 218 2018 5 5.61282e+00 8.42473e-01 319 2018 6 5.19727e+00 1.55053e+00 316 2018 7 7.07067e+00 1.13033e+00 408 2018 8 5.93309e+00 1.21399e+00 551 2018 9 4.52934e+00 1.13935e+00 510 2018 10 3.12303e+00 1.00051e+00 287 2018 11 3.24575e+00 4.99436e-01 422 2018 12 4.16184e+00 3.32645e-01 773 2019 1 3.86958e+00 2.71373e-01 328 2019 2 4.83299e+00 3.19856e-01 701 2019 3 5.43018e+00 7.23753e-01 941 2019 4 5.75185e+00 1.51029e+00 421 2019 5 6.68180e+00 9.18763e-01 536 2019 6 7.18744e+00 1.19277e+00 787 2019 7 6.28002e+00 1.92378e+00 649 2019 8 6.97729e+00 1.17662e+00 692 2019 9 4.24021e+00 1.57963e+00 897 2019 10 4.00795e+00 1.12164e+00 663 2019 11 3.61244e+00 7.80708e-01 632 2019 12 3.88837e+00 6.06745e-01 471 2020 1 3.86147e+00 7.27606e-01 780 2020 2 4.07008e+00 7.06963e-01 769 2020 3 5.13696e+00 8.39345e-01 419 2020 4 7.25183e+00 8.08434e-01 215 2020 5 5.68984e+00 1.28263e+00 519 2020 6 4.84528e+00 8.50292e-01 788 2020 7 7.27318e+00 1.48348e+00 681 2020 8 4.28359e+00 8.30646e-01 185 2020 9 4.63267e+00 8.01196e-01 726 2020 10 3.98030e+00 9.62334e-01 1370 2020 11 3.71382e+00 1.05929e+00 454 2020 12 3.18347e+00 4.78086e-01 682 2021 1 3.69160e+00 4.40983e-01 1085 2021 2 3.97275e+00 5.28770e-01 843 2021 3 3.94117e+00 8.99733e-01 534 2021 4 6.23640e+00 1.64954e+00 565 2021 5 7.04592e+00 1.28529e+00 448 2021 6 5.20198e+00 1.26765e+00 460 2021 7 7.12355e+00 1.31286e+00 492 2021 8 5.24193e+00 9.41168e-01 567 2021 9 3.99412e+00 8.32178e-01 830 2021 10 4.10024e+00 1.10845e+00 1334 2021 11 3.79559e+00 1.23124e+00 799 2021 12 3.78749e+00 6.49231e-01 506 2022 1 3.76785e+00 6.62943e-01 780 2022 2 5.22108e+00 7.22014e-01 821 2022 3 4.56174e+00 5.62247e-01 277 2022 4 4.65992e+00 4.64519e-01 25 2022 5 5.48618e+00 6.54271e-01 243 2022 6 7.22337e+00 1.07147e+00 375 2022 7 8.14845e+00 1.36682e+00 225 2022 8 5.54433e+00 1.48226e+00 393 2022 9 4.41514e+00 1.34209e+00 597 2022 10 4.02346e+00 9.02139e-01 616 2022 11 4.36209e+00 9.23895e-01 503 2022 12 3.94437e+00 8.19415e-01 819 2023 1 5.00628e+00 4.47594e-01 431 2023 2 4.44704e+00 9.00404e-01 576 2023 3 6.13119e+00 9.36518e-01 850 2023 4 6.27153e+00 1.36223e+00 832 2023 5 6.28685e+00 1.14231e+00 452 2023 6 7.08263e+00 7.85398e-01 908 2023 7 6.71711e+00 9.98849e-01 789 2023 8 5.26530e+00 1.04163e+00 373 2023 9 3.79225e+00 9.45740e-01 780 2023 10 3.67734e+00 1.08819e+00 709 2023 11 3.01809e+00 8.97790e-01 504 2023 12 3.96479e+00 8.97814e-01 835 2024 1 4.30692e+00 3.51135e-01 865 2024 2 4.39737e+00 3.85422e-01 1065 2024 3 4.80404e+00 5.41771e-01 866 2024 4 5.14991e+00 2.96546e-01 188