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 2.08408e+01 7.03142e+00 727 2002 8 1.35461e+01 6.97139e+00 734 2002 9 8.36743e+00 6.28321e+00 774 2002 10 3.27940e+00 1.57560e+00 896 2002 11 3.34041e+00 1.88423e+00 730 2002 12 5.12790e+00 1.48611e+00 492 2003 1 7.51797e+00 2.44336e+00 744 2003 2 5.88774e+00 1.71809e+00 384 2003 3 1.21547e+01 4.31831e+00 441 2003 4 1.56279e+01 6.32456e+00 368 2003 5 1.75023e+01 9.28721e+00 279 2003 6 1.89799e+01 7.37988e+00 417 2003 7 1.32331e+01 7.94276e+00 354 2003 8 1.15769e+01 9.23889e+00 706 2003 9 4.59088e+00 3.60557e+00 822 2003 10 2.08617e+00 1.09716e+00 756 2003 11 2.10437e+00 1.46723e+00 800 2003 12 1.78612e+00 6.76865e-01 412 2004 1 6.60719e-01 5.59886e-01 548 2004 2 1.56298e+00 1.48269e+00 541 2004 3 8.88155e+00 4.25728e+00 790 2004 4 1.13170e+01 8.42807e+00 323 2004 5 2.40645e+01 4.90521e+00 448 2004 6 1.93855e+01 6.67740e+00 514 2004 7 1.80916e+01 1.02415e+01 236 2004 8 8.27880e+00 5.25865e+00 563 2004 9 3.29893e+00 1.99827e+00 588 2004 10 2.33648e+00 2.22569e+00 867 2004 11 3.32776e+00 2.53907e+00 480 2004 12 1.85717e+00 1.16340e+00 510 2005 1 3.08017e+00 1.33639e+00 576 2005 2 4.28987e+00 2.14011e+00 637 2005 3 1.43385e+01 4.50687e+00 639 2005 4 1.17290e+01 6.42034e+00 391 2005 5 2.41117e+01 2.73788e+00 192 2005 6 1.97574e+01 9.14759e+00 726 2005 7 1.82989e+01 1.27616e+01 241 2005 8 1.13436e+01 8.56882e+00 368 2005 9 3.50625e+00 4.35067e+00 864 2005 10 3.31171e+00 2.19783e+00 697 2005 11 2.48207e+00 1.90982e+00 525 2005 12 1.77095e+00 1.02985e+00 873 2006 1 2.63120e+00 1.56213e+00 490 2006 2 4.09669e+00 1.70389e+00 347 2006 3 7.90861e+00 4.08781e+00 617 2006 4 2.07938e+01 5.97806e+00 398 2006 5 2.29552e+01 7.85489e+00 426 2006 6 2.73332e+01 8.94808e+00 875 2006 7 1.10767e+01 6.44084e+00 259 2006 8 3.95081e+00 2.73652e+00 115 2006 9 1.96195e+00 1.59672e+00 975 2006 10 3.68534e+00 4.00470e+00 719 2006 11 2.43847e+00 1.39805e+00 875 2006 12 2.39837e+00 1.59394e+00 595 2007 1 4.43276e+00 2.80073e+00 702 2007 2 5.55297e+00 2.13144e+00 831 2007 3 5.36366e+00 1.53655e+00 461 2007 4 4.77224e+00 1.82312e+00 90 2007 5 1.34369e+01 1.13648e+01 188 2007 6 8.75234e+00 7.51532e+00 274 2007 7 2.30873e+01 1.14585e+01 92 2007 8 1.68828e+01 8.09058e+00 695 2007 9 2.16137e+00 1.42387e+00 910 2007 10 1.61548e+00 1.27366e+00 694 2007 11 2.79825e+00 2.41885e+00 832 2007 12 1.21641e+00 7.23004e-01 617 2008 1 2.32835e+00 1.52100e+00 375 2008 2 3.21268e+00 1.81156e+00 644 2008 3 1.04441e+01 3.94171e+00 810 2008 4 2.09572e+01 6.66146e+00 209 2008 5 4.51035e+00 2.95684e+00 143 2008 6 2.03339e+01 1.73371e+01 114 2008 7 nan nan 0 2008 8 6.82225e+00 6.16925e+00 124 2008 9 2.29437e+00 2.00250e+00 438 2008 10 2.88413e+00 2.58173e+00 734 2008 11 1.69402e+00 1.05944e+00 604 2008 12 3.13147e+00 2.19305e+00 1017 2009 1 3.31877e+00 1.43306e+00 640 2009 2 2.90447e+00 1.76112e+00 320 2009 3 4.95401e+00 2.31769e+00 315 2009 4 1.32686e+01 5.53903e+00 192 2009 5 9.71964e+00 5.00274e+00 299 2009 6 9.99184e+00 5.93738e+00 180 2009 7 nan nan 0 2009 8 1.76634e+01 7.24547e+00 175 2009 9 1.29112e+01 8.80092e+00 561 2009 10 2.88435e+00 1.50813e+00 512 2009 11 1.65400e+00 1.42612e+00 670 2009 12 2.02252e+00 9.69905e-01 939 2010 1 2.03960e+00 1.18841e+00 764 2010 2 7.16638e+00 3.79940e+00 382 2010 3 1.02554e+01 6.39491e+00 550 2010 4 1.44378e+01 8.23698e+00 109 2010 5 2.28677e+01 8.03858e+00 314 2010 6 2.13032e+01 1.04998e+01 124 2010 7 2.21494e+01 1.23756e+01 399 2010 8 2.20137e+01 9.35470e+00 331 2010 9 3.28727e+00 1.20041e+00 419 2010 10 5.11624e+00 4.59923e+00 831 2010 11 3.33553e+00 1.84578e+00 1206 2010 12 2.29198e+00 1.39092e+00 768 2011 1 3.02355e+00 2.27147e+00 637 2011 2 3.59844e+00 1.34873e+00 389 2011 3 5.67654e+00 1.57912e+00 655 2011 4 8.79727e+00 1.45741e+00 250 2011 5 1.73070e+01 5.64015e+00 380 2011 6 2.64827e+01 4.96701e+00 207 2011 7 1.93153e+01 1.01190e+01 253 2011 8 2.01339e+01 7.19827e+00 318 2011 9 3.52153e+00 3.21084e+00 799 2011 10 2.47384e+00 1.52522e+00 909 2011 11 1.91259e+00 1.45339e+00 646 2011 12 4.44493e+00 2.09374e+00 865 2012 1 4.06648e+00 2.30822e+00 877 2012 2 3.97814e+00 2.81738e+00 656 2012 3 7.39996e+00 2.90576e+00 618 2012 4 7.30798e+00 3.78057e+00 251 2012 5 3.43049e+01 4.07216e+00 64 2012 6 1.36244e+01 6.82705e+00 325 2012 7 2.13118e+01 7.60538e+00 360 2012 8 2.53014e+01 9.77890e+00 311 2012 9 6.08744e+00 5.03573e+00 576 2012 10 4.34406e+00 1.92304e+00 483 2012 11 5.97954e+00 3.81002e+00 717 2012 12 5.15593e+00 2.09121e+00 456 2013 1 4.59904e+00 4.31099e+00 764 2013 2 4.92241e+00 2.16078e+00 774 2013 3 9.17687e+00 3.90891e+00 516 2013 4 1.90526e+01 6.92565e+00 204 2013 5 2.64056e+01 3.26729e+00 260 2013 6 2.04635e+01 7.53026e+00 369 2013 7 3.40666e+01 8.37622e+00 396 2013 8 1.91222e+01 6.79745e+00 534 2013 9 8.71965e+00 6.92098e+00 874 2013 10 4.25175e+00 2.66571e+00 887 2013 11 4.30174e+00 1.71890e+00 646 2013 12 3.79697e+00 2.38595e+00 966 2014 1 4.75501e+00 2.59724e+00 663 2014 2 5.00239e+00 1.63315e+00 584 2014 3 1.43240e+01 5.65802e+00 674 2014 4 1.91325e+01 8.02684e+00 536 2014 5 1.84119e+01 7.03457e+00 292 2014 6 1.57427e+01 9.11191e+00 671 2014 7 1.29880e+01 7.46596e+00 567 2014 8 2.29485e+01 1.10300e+01 375 2014 9 7.00088e+00 8.51951e+00 999 2014 10 1.70368e+00 1.25432e+00 968 2014 11 1.65092e+00 1.01748e+00 876 2014 12 2.07627e+00 1.21724e+00 1015 2015 1 4.11292e+00 2.32316e+00 820 2015 2 5.53704e+00 2.81256e+00 434 2015 3 8.86031e+00 3.09827e+00 513 2015 4 7.81741e+00 5.36537e+00 411 2015 5 1.03268e+01 4.74813e+00 222 2015 6 1.96729e+01 8.62449e+00 487 2015 7 1.69800e+01 4.65940e+00 131 2015 8 2.58683e+01 6.41952e+00 636 2015 9 1.82510e+00 1.25051e+00 693 2015 10 1.52178e+00 1.24508e+00 669 2015 11 9.77621e-01 8.72923e-01 852 2015 12 2.16670e+00 1.21490e+00 896 2016 1 2.17679e+00 8.90625e-01 829 2016 2 4.40763e+00 2.87843e+00 1066 2016 3 1.07373e+01 4.18880e+00 583 2016 4 1.66546e+01 6.69181e+00 652 2016 5 1.16224e+01 8.01798e+00 545 2016 6 1.57068e+01 1.05953e+01 393 2016 7 2.87046e+01 6.39055e+00 489 2016 8 2.11296e+01 9.55119e+00 766 2016 9 3.91838e+00 4.97910e+00 783 2016 10 3.57540e+00 3.00773e+00 1094 2016 11 3.36450e+00 2.47608e+00 690 2016 12 3.79312e+00 2.84235e+00 700 2017 1 2.46707e+00 1.87928e+00 574 2017 2 5.51313e+00 2.75770e+00 444 2017 3 1.08188e+01 4.36413e+00 752 2017 4 1.16752e+01 9.32772e+00 184 2017 5 2.96767e+01 9.52355e+00 222 2017 6 2.46309e+01 7.22923e+00 776 2017 7 2.51259e+01 9.71650e+00 460 2017 8 9.85381e+00 7.92927e+00 559 2017 9 2.14013e+00 1.19414e+00 513 2017 10 3.33051e+00 4.19735e+00 885 2017 11 1.48721e+00 1.28764e+00 799 2017 12 2.82187e+00 2.78526e+00 835 2018 1 2.87964e+00 1.71854e+00 788 2018 2 3.58052e+00 1.93071e+00 360 2018 3 8.36227e+00 5.53752e+00 931 2018 4 9.55277e+00 4.02523e+00 278 2018 5 2.68921e+01 7.06095e+00 359 2018 6 1.75200e+01 8.91751e+00 509 2018 7 2.22998e+01 7.57220e+00 394 2018 8 1.25554e+01 5.49768e+00 601 2018 9 5.17631e+00 3.71104e+00 602 2018 10 1.87903e+00 1.16527e+00 296 2018 11 2.23911e+00 1.83724e+00 478 2018 12 3.83603e+00 1.11848e+00 696 2019 1 3.98969e+00 1.71573e+00 384 2019 2 6.64007e+00 1.60233e+00 694 2019 3 1.34559e+01 3.51438e+00 898 2019 4 1.22451e+01 6.49469e+00 656 2019 5 1.47805e+01 5.49705e+00 621 2019 6 2.39253e+01 7.20842e+00 975 2019 7 2.18849e+01 4.18545e+00 623 2019 8 1.77195e+01 8.16242e+00 836 2019 9 6.23547e+00 3.41175e+00 1093 2019 10 2.29199e+00 1.32417e+00 640 2019 11 1.50018e+00 6.95999e-01 597 2019 12 3.67165e+00 1.16931e+00 595 2020 1 4.10497e+00 1.38677e+00 763 2020 2 4.02309e+00 2.19645e+00 775 2020 3 7.80395e+00 3.60895e+00 563 2020 4 1.37333e+01 6.74032e+00 350 2020 5 1.24793e+01 6.07120e+00 476 2020 6 2.13760e+01 4.72512e+00 809 2020 7 2.43151e+01 6.68470e+00 566 2020 8 3.34608e+00 2.41368e+00 182 2020 9 4.63462e+00 3.91650e+00 757 2020 10 2.25582e+00 1.23901e+00 1388 2020 11 2.81240e+00 1.93851e+00 613 2020 12 8.79765e-01 5.60359e-01 813 2021 1 1.89659e+00 9.75926e-01 1082 2021 2 2.90313e+00 1.23876e+00 836 2021 3 3.45848e+00 1.75107e+00 480 2021 4 1.15566e+01 6.21127e+00 368 2021 5 2.80119e+01 8.90626e+00 640 2021 6 1.90504e+01 8.40427e+00 702 2021 7 2.37758e+01 7.92444e+00 652 2021 8 9.03869e+00 6.79125e+00 680 2021 9 3.84362e+00 3.03107e+00 971 2021 10 3.84949e+00 3.65530e+00 1239 2021 11 1.57741e+00 1.30245e+00 735 2021 12 3.28187e+00 2.34853e+00 471 2022 1 3.76490e+00 2.92931e+00 711 2022 2 7.19696e+00 3.61854e+00 815 2022 3 5.51890e+00 2.51985e+00 388 2022 4 2.28577e+01 2.48094e+00 103 2022 5 2.75398e+01 5.47628e+00 244 2022 6 3.39435e+01 4.46548e+00 409 2022 7 2.69129e+01 8.98659e+00 302 2022 8 9.50888e+00 5.41894e+00 548 2022 9 5.00658e+00 2.67723e+00 1007 2022 10 4.77303e+00 3.42725e+00 745 2022 11 6.62519e+00 2.47843e+00 449 2022 12 3.32174e+00 2.32443e+00 729 2023 1 4.49238e+00 1.72703e+00 384 2023 2 4.39369e+00 6.41784e+00 514 2023 3 1.68586e+01 4.53943e+00 970 2023 4 1.55702e+01 4.91521e+00 723 2023 5 1.96871e+01 4.72533e+00 392 2023 6 2.40943e+01 5.00862e+00 896 2023 7 1.98185e+01 4.03448e+00 875 2023 8 1.39502e+01 4.98562e+00 341 2023 9 4.09518e+00 3.24414e+00 885 2023 10 2.65928e+00 2.86257e+00 896 2023 11 2.49040e+00 2.06071e+00 522 2023 12 2.06890e+00 1.37530e+00 850 2024 1 5.09135e+00 1.60552e+00 799 2024 2 4.55234e+00 1.15305e+00 1148 2024 3 5.51202e+00 2.22747e+00 810 2024 4 1.77144e+01 3.95300e+00 190