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 2.02299e+01 5.38374e+00 871 2002 8 1.18164e+01 5.96849e+00 731 2002 9 5.81615e+00 4.27283e+00 1075 2002 10 3.86591e+00 2.65807e+00 732 2002 11 7.70456e-01 6.31887e-01 921 2002 12 2.37090e+00 1.81007e+00 449 2003 1 4.83966e+00 4.00595e+00 766 2003 2 2.85614e+00 1.50871e+00 623 2003 3 6.85499e+00 5.67797e+00 574 2003 4 1.48736e+01 7.66140e+00 384 2003 5 1.75876e+01 1.18148e+01 346 2003 6 2.91708e+01 5.89430e+00 704 2003 7 1.47958e+01 6.59779e+00 617 2003 8 1.41327e+01 5.20887e+00 1073 2003 9 4.43533e+00 4.81663e+00 1241 2003 10 3.44535e+00 2.19465e+00 764 2003 11 2.53383e+00 2.29942e+00 831 2003 12 1.49187e+00 1.02427e+00 533 2004 1 2.18318e+00 1.22528e+00 648 2004 2 2.49868e+00 1.57401e+00 640 2004 3 7.00679e+00 3.71178e+00 836 2004 4 1.65598e+01 7.05328e+00 382 2004 5 1.04237e+01 7.14900e+00 509 2004 6 1.42082e+01 5.35713e+00 843 2004 7 2.03687e+01 6.06400e+00 906 2004 8 1.08239e+01 5.95954e+00 884 2004 9 4.37761e+00 4.38291e+00 925 2004 10 3.83926e+00 2.85399e+00 735 2004 11 8.81601e-01 5.18942e-01 256 2004 12 2.60032e+00 1.86922e+00 564 2005 1 3.53790e+00 1.33735e+00 588 2005 2 3.30497e+00 1.41996e+00 493 2005 3 9.97648e+00 6.07561e+00 838 2005 4 1.35055e+01 6.20062e+00 646 2005 5 1.86764e+01 6.77460e+00 383 2005 6 1.08482e+01 5.64647e+00 558 2005 7 9.31199e+00 3.33907e+00 192 2005 8 1.20901e+01 8.02316e+00 866 2005 9 1.74100e+00 2.16111e+00 1364 2005 10 2.40862e+00 2.34862e+00 1142 2005 11 1.64847e+00 8.59888e-01 640 2005 12 1.04814e+00 8.86415e-01 903 2006 1 2.53177e+00 1.50463e+00 655 2006 2 6.51205e+00 4.10644e+00 436 2006 3 1.17180e+01 6.88164e+00 977 2006 4 2.00278e+01 6.96871e+00 450 2006 5 1.74564e+01 5.49065e+00 281 2006 6 1.51087e+01 8.66843e+00 1103 2006 7 1.55292e+01 6.29275e+00 512 2006 8 5.37947e+00 5.11014e+00 233 2006 9 2.62183e+00 3.03075e+00 1051 2006 10 2.63485e+00 1.82111e+00 769 2006 11 1.39847e+00 1.74057e+00 977 2006 12 1.02183e+00 1.27814e+00 748 2007 1 2.97855e+00 1.60622e+00 917 2007 2 4.26381e+00 2.39625e+00 1022 2007 3 8.95734e+00 3.34549e+00 686 2007 4 9.75604e+00 2.05734e+00 128 2007 5 1.80605e+01 1.05091e+01 128 2007 6 1.39520e+01 4.23807e+00 697 2007 7 8.92941e+00 4.33864e+00 260 2007 8 1.55582e+01 6.17911e+00 566 2007 9 2.69799e+00 2.78807e+00 996 2007 10 2.22159e+00 1.71312e+00 832 2007 11 1.48051e+00 1.02910e+00 918 2007 12 2.10331e+00 1.31072e+00 640 2008 1 3.95090e+00 2.36341e+00 288 2008 2 4.40481e+00 1.81382e+00 399 2008 3 9.52842e+00 3.80368e+00 704 2008 4 1.89612e+01 6.28373e+00 376 2008 5 1.50131e+01 2.89123e+00 64 2008 6 1.86037e+01 1.54187e+01 113 2008 7 8.62951e+00 8.26923e+00 233 2008 8 3.31981e+00 2.54129e+00 210 2008 9 7.27316e-01 4.87138e-01 246 2008 10 1.00905e+00 8.33060e-01 625 2008 11 1.32149e+00 1.08366e+00 623 2008 12 3.16511e+00 2.04072e+00 955 2009 1 7.65035e+00 3.78163e+00 846 2009 2 8.15624e+00 5.45915e+00 320 2009 3 6.92433e+00 2.71966e+00 427 2009 4 1.71607e+01 5.61371e+00 83 2009 5 1.70447e+01 5.36002e+00 282 2009 6 1.59176e+01 6.96158e+00 448 2009 7 5.37238e+00 1.68504e+00 176 2009 8 9.89674e+00 4.58881e+00 415 2009 9 5.90210e+00 5.07363e+00 366 2009 10 1.76549e+00 1.90496e+00 522 2009 11 3.91917e+00 2.62736e+00 405 2009 12 5.45427e+00 4.34313e+00 568 2010 1 4.12797e+00 2.15070e+00 889 2010 2 5.64728e+00 2.23338e+00 494 2010 3 1.16644e+01 5.49353e+00 541 2010 4 9.55769e+00 5.34172e+00 267 2010 5 1.09273e+01 2.67899e+00 444 2010 6 1.46399e+01 5.43779e+00 427 2010 7 1.77938e+01 8.57327e+00 545 2010 8 1.24382e+01 7.33019e+00 170 2010 9 1.01536e+01 5.49254e+00 664 2010 10 2.55602e+00 1.65806e+00 895 2010 11 3.23535e+00 1.73302e+00 1304 2010 12 5.88211e+00 4.33946e+00 954 2011 1 4.84401e+00 1.64783e+00 510 2011 2 6.10093e+00 1.99424e+00 433 2011 3 9.36796e+00 4.78894e+00 756 2011 4 7.11201e+00 3.21642e+00 298 2011 5 2.34671e+01 9.34191e+00 249 2011 6 1.98980e+01 3.59726e+00 412 2011 7 2.19028e+01 8.81234e+00 444 2011 8 1.77295e+01 7.58112e+00 982 2011 9 5.70696e+00 3.99670e+00 884 2011 10 2.86644e+00 2.35072e+00 737 2011 11 2.61004e+00 1.68945e+00 436 2011 12 3.10178e+00 2.80215e+00 1088 2012 1 3.51191e+00 2.75572e+00 774 2012 2 2.82741e+00 1.49191e+00 679 2012 3 5.10898e+00 1.98004e+00 519 2012 4 2.00062e+01 5.24635e+00 256 2012 5 nan nan 0 2012 6 2.46132e+01 6.46512e+00 383 2012 7 1.77312e+01 4.23226e+00 311 2012 8 1.97948e+01 9.36388e+00 555 2012 9 7.65164e+00 4.17172e+00 754 2012 10 9.48212e+00 5.24832e+00 787 2012 11 7.39241e+00 3.77209e+00 640 2012 12 6.86627e+00 2.62352e+00 308 2013 1 6.42265e+00 4.02509e+00 526 2013 2 6.72412e+00 2.14851e+00 699 2013 3 7.37705e+00 3.46291e+00 800 2013 4 1.96584e+01 9.28351e+00 256 2013 5 2.87035e+01 4.41104e+00 370 2013 6 2.04066e+01 1.12378e+01 663 2013 7 2.31321e+01 4.68656e+00 562 2013 8 1.32044e+01 8.72900e+00 866 2013 9 9.53035e+00 6.02594e+00 1003 2013 10 5.24017e+00 4.19629e+00 978 2013 11 5.59482e+00 4.04837e+00 528 2013 12 5.24704e+00 3.60048e+00 928 2014 1 9.80369e+00 5.97923e+00 653 2014 2 1.01525e+01 3.47345e+00 830 2014 3 1.59262e+01 5.08138e+00 629 2014 4 1.62347e+01 9.17843e+00 512 2014 5 2.30254e+01 5.81749e+00 512 2014 6 3.09769e+01 5.35526e+00 701 2014 7 1.93683e+01 6.29565e+00 847 2014 8 1.55847e+01 6.74943e+00 592 2014 9 1.13385e+01 8.11940e+00 1050 2014 10 4.61646e+00 3.83598e+00 984 2014 11 4.04460e+00 2.31547e+00 884 2014 12 5.67578e+00 3.28616e+00 1151 2015 1 4.80104e+00 1.51265e+00 689 2015 2 9.37785e+00 4.04603e+00 576 2015 3 1.33495e+01 5.40322e+00 736 2015 4 9.55431e+00 5.45894e+00 338 2015 5 9.91878e+00 4.57630e+00 332 2015 6 1.96261e+01 6.17201e+00 690 2015 7 9.32322e+00 1.56962e+00 128 2015 8 1.81437e+01 8.05750e+00 677 2015 9 4.33798e+00 2.70012e+00 258 2015 10 2.51554e+00 1.53812e+00 422 2015 11 2.01630e+00 1.67886e+00 680 2015 12 2.30017e+00 1.52949e+00 842 2016 1 3.83746e+00 1.66620e+00 919 2016 2 4.85555e+00 2.24870e+00 1203 2016 3 8.48393e+00 5.29112e+00 613 2016 4 1.88038e+01 8.50081e+00 752 2016 5 2.14859e+01 7.50685e+00 704 2016 6 3.11717e+01 7.51281e+00 705 2016 7 2.09249e+01 6.92449e+00 745 2016 8 2.02931e+01 8.10373e+00 768 2016 9 4.28571e+00 4.58071e+00 868 2016 10 2.99884e+00 2.89021e+00 929 2016 11 2.96030e+00 1.70392e+00 533 2016 12 1.96098e+00 1.53302e+00 600 2017 1 1.73406e+00 1.53368e+00 576 2017 2 6.29751e+00 3.14528e+00 640 2017 3 9.82522e+00 5.59821e+00 667 2017 4 3.03784e+01 3.41408e+00 320 2017 5 1.59841e+01 4.89345e+00 328 2017 6 2.55659e+01 8.20779e+00 973 2017 7 2.00061e+01 7.25391e+00 312 2017 8 2.48835e+01 9.02375e+00 576 2017 9 8.90031e+00 5.23744e+00 318 2017 10 1.22781e+00 9.06899e-01 784 2017 11 1.92560e+00 1.81210e+00 606 2017 12 3.44188e+00 3.29111e+00 839 2018 1 6.71218e+00 3.16492e+00 1011 2018 2 4.00892e+00 2.19499e+00 576 2018 3 9.59550e+00 4.67524e+00 831 2018 4 1.55766e+01 4.32373e+00 384 2018 5 1.33961e+01 3.92220e+00 530 2018 6 1.58097e+01 6.80727e+00 564 2018 7 1.88596e+01 5.75391e+00 842 2018 8 1.01153e+01 7.75835e+00 885 2018 9 9.10677e+00 5.50268e+00 862 2018 10 7.76934e+00 5.73627e+00 340 2018 11 3.49941e+00 2.22036e+00 506 2018 12 3.41537e+00 1.51145e+00 619 2019 1 2.92130e+00 1.53116e+00 320 2019 2 5.03272e+00 1.75535e+00 698 2019 3 6.10270e+00 2.38878e+00 932 2019 4 1.48576e+01 6.48705e+00 684 2019 5 8.96751e+00 4.19874e+00 793 2019 6 2.64662e+01 9.15077e+00 1014 2019 7 2.92224e+01 5.16728e+00 936 2019 8 1.88307e+01 5.61068e+00 1137 2019 9 5.03864e+00 5.03259e+00 1283 2019 10 1.86360e+00 1.52007e+00 680 2019 11 1.88736e+00 1.19460e+00 623 2019 12 3.55602e+00 1.92234e+00 450 2020 1 5.18839e+00 1.72469e+00 894 2020 2 4.34401e+00 1.96180e+00 865 2020 3 6.39271e+00 3.85406e+00 832 2020 4 1.45896e+01 4.90742e+00 485 2020 5 2.31637e+01 9.65745e+00 527 2020 6 3.16433e+01 6.54425e+00 974 2020 7 2.11170e+01 6.51534e+00 814 2020 8 1.47579e+01 5.67972e+00 512 2020 9 2.46098e+00 2.37736e+00 879 2020 10 2.40514e+00 2.13768e+00 1406 2020 11 3.00186e+00 2.42031e+00 521 2020 12 2.00460e+00 1.09319e+00 530 2021 1 2.79270e+00 1.13080e+00 826 2021 2 4.47840e+00 1.46972e+00 778 2021 3 5.51428e+00 2.34196e+00 638 2021 4 1.93719e+01 3.04344e+00 257 2021 5 3.04083e+01 5.77594e+00 627 2021 6 2.83340e+01 6.73446e+00 897 2021 7 2.08926e+01 5.78318e+00 896 2021 8 1.08027e+01 8.17179e+00 793 2021 9 2.71107e+00 2.09835e+00 1044 2021 10 2.36239e+00 1.78801e+00 1249 2021 11 1.95970e+00 1.59010e+00 702 2021 12 3.71067e+00 2.43700e+00 548 2022 1 5.66906e+00 3.02505e+00 614 2022 2 6.66769e+00 2.54675e+00 768 2022 3 5.23368e+00 2.05478e+00 512 2022 4 8.45304e+00 4.69173e+00 128 2022 5 2.50009e+01 4.69966e+00 384 2022 6 2.64105e+01 5.34317e+00 373 2022 7 2.45733e+01 8.10442e+00 402 2022 8 2.22010e+01 6.42438e+00 384 2022 9 1.25280e+01 5.52795e+00 760 2022 10 4.56690e+00 3.28684e+00 1024 2022 11 3.83696e+00 2.25707e+00 382 2022 12 5.31762e+00 3.83571e+00 697 2023 1 4.76589e+00 2.21372e+00 448 2023 2 8.68813e+00 4.27068e+00 478 2023 3 2.01929e+01 4.15165e+00 609 2023 4 1.69831e+01 3.29768e+00 787 2023 5 2.04126e+01 4.77885e+00 448 2023 6 2.40308e+01 5.33866e+00 877 2023 7 2.46052e+01 4.00876e+00 829 2023 8 1.79560e+01 5.72492e+00 681 2023 9 6.61944e+00 4.54073e+00 808 2023 10 1.71733e+00 1.86076e+00 751 2023 11 1.74472e+00 2.53824e+00 585 2023 12 2.55575e+00 2.85603e+00 740 2024 1 4.54215e+00 2.05573e+00 1016 2024 2 9.19495e+00 3.39239e+00 1121 2024 3 1.29794e+01 3.46475e+00 730 2024 4 1.94390e+01 3.48797e+00 128