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 1.04242e+01 1.08411e+00 256 2002 8 7.57591e+00 7.66919e-01 384 2002 9 7.33583e+00 1.26556e+00 704 2002 10 6.64037e+00 7.37640e-01 1138 2002 11 5.27338e+00 1.76684e+00 763 2002 12 5.72892e+00 1.61538e+00 832 2003 1 5.54855e+00 1.11248e+00 702 2003 2 7.39671e+00 1.16931e+00 698 2003 3 9.57703e+00 5.95042e-01 393 2003 4 7.39962e+00 1.57616e+00 552 2003 5 9.80316e+00 1.26486e+00 640 2003 6 8.90129e+00 8.41537e-01 425 2003 7 9.65458e+00 4.89475e-01 546 2003 8 9.55093e+00 4.09186e-01 452 2003 9 5.33148e+00 8.46834e-01 418 2003 10 6.48117e+00 1.25793e+00 899 2003 11 5.51706e+00 1.61328e+00 967 2003 12 5.58480e+00 1.50040e+00 948 2004 1 6.72694e+00 1.10745e+00 1062 2004 2 7.89053e+00 2.08030e+00 886 2004 3 9.68874e+00 7.85256e-01 1170 2004 4 7.86809e+00 1.08829e+00 512 2004 5 8.83237e+00 1.05479e+00 843 2004 6 9.42567e+00 1.47745e+00 704 2004 7 8.76320e+00 1.99771e+00 522 2004 8 7.70235e+00 1.90924e+00 691 2004 9 4.87525e+00 1.63531e+00 434 2004 10 4.66991e+00 1.61070e+00 1017 2004 11 5.17164e+00 9.29002e-01 1152 2004 12 4.69312e+00 1.80425e+00 496 2005 1 6.16746e+00 1.17582e+00 1049 2005 2 4.77281e+00 1.58355e+00 896 2005 3 4.55263e+00 8.09718e-01 398 2005 4 8.57656e+00 1.34324e+00 891 2005 5 1.00064e+01 9.74493e-01 640 2005 6 7.47642e+00 1.41389e+00 128 2005 7 7.48876e+00 1.53978e+00 602 2005 8 6.93665e+00 1.62773e+00 768 2005 9 4.18430e+00 5.80233e-01 469 2005 10 3.01563e+00 1.15504e+00 704 2005 11 3.35408e+00 6.28171e-01 1056 2005 12 3.70695e+00 7.31566e-01 831 2006 1 4.73373e+00 1.01737e+00 797 2006 2 5.54745e+00 1.08780e+00 1028 2006 3 7.30177e+00 7.12390e-01 1152 2006 4 1.03308e+01 1.30047e+00 640 2006 5 1.04802e+01 7.97193e-01 780 2006 6 9.35755e+00 6.24461e-01 896 2006 7 9.77680e+00 1.20099e+00 406 2006 8 8.98973e+00 6.86580e-01 497 2006 9 8.72158e+00 1.96842e+00 660 2006 10 4.41472e+00 1.07881e+00 928 2006 11 5.52397e+00 1.02826e+00 621 2006 12 5.23191e+00 9.74546e-01 424 2007 1 6.25313e+00 9.91878e-01 576 2007 2 6.76464e+00 1.75461e+00 640 2007 3 9.63709e+00 1.57164e+00 780 2007 4 8.48580e+00 1.74365e+00 717 2007 5 8.88655e+00 7.49877e-01 593 2007 6 9.06598e+00 7.83726e-01 415 2007 7 8.71100e+00 7.44189e-01 677 2007 8 6.98889e+00 8.83638e-01 840 2007 9 7.15279e+00 1.04848e+00 768 2007 10 5.24740e+00 1.04577e+00 764 2007 11 7.09603e+00 1.36521e+00 1099 2007 12 7.40767e+00 1.91905e+00 1216 2008 1 7.41179e+00 2.12383e+00 672 2008 2 8.50971e+00 1.93790e+00 868 2008 3 8.67411e+00 2.47801e+00 763 2008 4 1.03135e+01 1.29793e+00 833 2008 5 1.00899e+01 1.04203e+00 704 2008 6 1.05625e+01 9.51873e-01 648 2008 7 8.75961e+00 1.34885e+00 535 2008 8 7.55751e+00 1.19122e+00 256 2008 9 5.59555e+00 1.36207e+00 583 2008 10 4.39514e+00 1.19194e+00 959 2008 11 6.36104e+00 1.49318e+00 1026 2008 12 6.28446e+00 1.75533e+00 1283 2009 1 7.26406e+00 1.78255e+00 960 2009 2 8.03599e+00 2.39770e+00 960 2009 3 8.78467e+00 2.34039e+00 904 2009 4 9.90687e+00 1.40174e+00 704 2009 5 1.08731e+01 1.28570e+00 658 2009 6 1.02621e+01 9.59175e-01 359 2009 7 9.55813e+00 8.44228e-01 427 2009 8 8.25634e+00 9.91621e-01 638 2009 9 7.37102e+00 1.93877e+00 607 2009 10 6.27983e+00 1.47634e+00 1068 2009 11 7.41304e+00 6.52768e-01 671 2009 12 6.88737e+00 1.15552e+00 454 2010 1 6.90676e+00 1.64770e+00 542 2010 2 5.42935e+00 1.86783e+00 420 2010 3 6.56320e+00 1.07472e+00 960 2010 4 7.61927e+00 7.08222e-01 448 2010 5 1.02440e+01 9.01913e-01 704 2010 6 1.09426e+01 9.59218e-01 980 2010 7 1.08419e+01 9.42832e-01 512 2010 8 8.80745e+00 1.25255e+00 674 2010 9 7.07607e+00 1.15107e+00 845 2010 10 7.49370e+00 8.33368e-01 1152 2010 11 8.24877e+00 1.48708e+00 1039 2010 12 4.85658e+00 1.39110e+00 832 2011 1 6.73138e+00 1.37877e+00 460 2011 2 9.20858e+00 9.25837e-01 952 2011 3 9.19635e+00 9.57380e-01 1053 2011 4 9.94012e+00 9.21487e-01 1001 2011 5 9.64983e+00 1.48912e+00 727 2011 6 9.35028e+00 8.03338e-01 638 2011 7 8.35846e+00 9.99230e-01 734 2011 8 6.66112e+00 7.70934e-01 522 2011 9 5.73783e+00 8.27454e-01 483 2011 10 6.80931e+00 2.09196e+00 512 2011 11 5.34325e+00 1.28677e+00 1225 2011 12 7.20258e+00 1.31462e+00 1347 2012 1 7.31723e+00 1.29521e+00 1216 2012 2 8.40798e+00 7.94246e-01 512 2012 3 8.73979e+00 1.34110e+00 1120 2012 4 9.66775e+00 1.07528e+00 801 2012 5 9.05306e+00 6.18390e-01 512 2012 6 8.53934e+00 1.11171e+00 256 2012 7 9.81932e+00 9.25590e-01 453 2012 8 9.10235e+00 9.84227e-01 506 2012 9 6.10192e+00 2.11716e+00 503 2012 10 5.45632e+00 1.63403e+00 840 2012 11 8.06536e+00 8.61768e-01 850 2012 12 6.03910e+00 2.13577e+00 828 2013 1 7.57950e+00 1.92363e+00 1034 2013 2 7.11939e+00 2.41168e+00 806 2013 3 6.99159e+00 1.50796e+00 796 2013 4 1.00979e+01 1.27275e+00 688 2013 5 9.87767e+00 7.34840e-01 820 2013 6 1.09355e+01 1.17468e+00 679 2013 7 8.37706e+00 2.16111e+00 194 2013 8 9.39132e+00 9.86604e-01 398 2013 9 7.49767e+00 1.93365e+00 684 2013 10 5.58169e+00 8.80408e-01 907 2013 11 6.19685e+00 1.65609e+00 696 2013 12 6.06380e+00 5.84079e-01 762 2014 1 5.49584e+00 1.44692e+00 558 2014 2 7.23112e+00 1.09027e+00 831 2014 3 7.02536e+00 8.60658e-01 706 2014 4 8.79003e+00 1.52322e+00 543 2014 5 8.40417e+00 9.94375e-01 835 2014 6 7.68889e+00 8.44327e-01 576 2014 7 8.63284e+00 5.27356e-01 448 2014 8 7.54577e+00 7.65828e-01 637 2014 9 7.87993e+00 1.02486e+00 320 2014 10 7.75970e+00 1.68719e+00 1152 2014 11 5.99984e+00 1.10689e+00 843 2014 12 6.58419e+00 3.53065e-01 896 2015 1 5.70732e+00 1.92894e+00 700 2015 2 5.69009e+00 8.03356e-01 736 2015 3 8.29703e+00 1.02158e+00 1231 2015 4 9.52899e+00 5.84767e-01 554 2015 5 7.59851e+00 1.28386e+00 1018 2015 6 9.02980e+00 8.23630e-01 599 2015 7 8.23271e+00 1.10344e+00 348 2015 8 8.20979e+00 7.09396e-01 320 2015 9 7.95920e+00 6.21197e-01 192 2015 10 5.51321e+00 7.18894e-01 557 2015 11 6.59892e+00 1.25451e+00 910 2015 12 4.99696e+00 1.54599e+00 448 2016 1 4.10020e+00 1.91324e+00 415 2016 2 3.97332e+00 1.15119e+00 885 2016 3 7.36191e+00 1.41913e+00 638 2016 4 8.29471e+00 1.00737e+00 672 2016 5 8.94521e+00 7.18809e-01 896 2016 6 1.00610e+01 8.02817e-01 397 2016 7 8.68531e+00 1.31512e+00 399 2016 8 9.61992e+00 1.43457e+00 621 2016 9 7.16582e+00 1.67155e+00 583 2016 10 6.18711e+00 2.45363e+00 926 2016 11 8.14557e+00 1.63455e+00 1216 2016 12 8.76953e+00 3.28207e-01 832 2017 1 6.67064e+00 2.40431e+00 945 2017 2 6.78903e+00 9.97279e-01 960 2017 3 8.90774e+00 9.69980e-01 1163 2017 4 8.51020e+00 1.32210e+00 653 2017 5 1.01590e+01 8.43902e-01 896 2017 6 8.61846e+00 9.16597e-01 267 2017 7 9.39544e+00 1.06148e+00 289 2017 8 7.88206e+00 7.10846e-01 578 2017 9 5.20275e+00 1.06493e+00 749 2017 10 4.41912e+00 1.38539e+00 818 2017 11 5.35440e+00 1.10359e+00 1170 2017 12 5.42809e+00 1.79798e+00 1102 2018 1 5.95630e+00 9.95692e-01 732 2018 2 8.30645e+00 1.56343e+00 915 2018 3 8.06594e+00 1.88809e+00 1282 2018 4 9.22360e+00 8.54060e-01 965 2018 5 9.97983e+00 7.43250e-01 384 2018 6 9.05537e+00 1.38019e+00 512 2018 7 8.72725e+00 1.68630e+00 592 2018 8 4.59198e+00 1.31744e+00 576 2018 9 4.94971e+00 1.86509e+00 640 2018 10 5.61773e+00 2.05357e+00 1047 2018 11 4.60703e+00 1.94115e+00 773 2018 12 3.59365e+00 1.43670e+00 558 2019 1 5.29149e+00 1.40558e+00 664 2019 2 8.01392e+00 1.15211e+00 821 2019 3 9.46539e+00 1.09253e+00 947 2019 4 9.37998e+00 1.10465e+00 691 2019 5 1.02839e+01 6.31228e-01 887 2019 6 9.78985e+00 8.34986e-01 564 2019 7 8.40478e+00 1.75847e+00 525 2019 8 8.33578e+00 8.03615e-01 398 2019 9 7.27306e+00 1.52205e+00 596 2019 10 7.29474e+00 1.20495e+00 899 2019 11 5.63387e+00 1.18171e+00 610 2019 12 5.31838e+00 8.51264e-01 704 2020 1 6.82134e+00 1.83463e+00 939 2020 2 7.46322e+00 1.31332e+00 743 2020 3 9.67986e+00 1.74867e+00 1138 2020 4 9.79313e+00 9.24803e-01 448 2020 5 9.79398e+00 1.07436e+00 646 2020 6 9.49391e+00 8.10748e-01 388 2020 7 7.98127e+00 6.28074e-01 448 2020 8 8.24680e+00 6.70869e-01 448 2020 9 7.77510e+00 5.07179e-01 214 2020 10 6.54137e+00 1.33580e+00 625 2020 11 3.86059e+00 7.86457e-01 1027 2020 12 5.48530e+00 1.38039e+00 880 2021 1 6.10204e+00 1.24622e+00 602 2021 2 7.47246e+00 1.70727e+00 823 2021 3 9.47326e+00 9.23224e-01 977 2021 4 9.69555e+00 7.15142e-01 728 2021 5 7.48507e+00 2.36971e+00 884 2021 6 8.58878e+00 1.33187e+00 192 2021 7 6.73632e+00 1.24900e+00 452 2021 8 7.23198e+00 1.34243e+00 518 2021 9 5.81533e+00 9.93789e-01 502 2021 10 4.21947e+00 1.50863e+00 811 2021 11 5.52310e+00 1.79082e+00 832 2021 12 6.78719e+00 1.20363e+00 896 2022 1 5.46742e+00 2.44536e+00 757 2022 2 6.83057e+00 1.67809e+00 1019 2022 3 7.54657e+00 1.71227e+00 1024 2022 4 1.01968e+01 1.02200e+00 384 2022 5 1.07117e+01 7.40115e-01 875 2022 6 9.84923e+00 9.06504e-01 640 2022 7 7.67317e+00 7.78623e-01 676 2022 8 5.73166e+00 4.59790e-01 468 2022 9 7.32461e+00 1.28742e+00 540 2022 10 4.66262e+00 1.44621e+00 1059 2022 11 4.99761e+00 1.19236e+00 763 2022 12 5.67358e+00 8.55447e-01 911 2023 1 7.21928e+00 1.72735e+00 862 2023 2 7.28759e+00 2.43635e+00 1216 2023 3 9.14450e+00 1.23928e+00 810 2023 4 1.08035e+01 1.27199e+00 384 2023 5 8.71719e+00 1.84912e+00 757 2023 6 8.42305e+00 7.68629e-01 460 2023 7 5.12557e+00 1.44017e+00 508 2023 8 4.77607e+00 9.99385e-01 384 2023 9 7.25339e+00 2.79667e+00 904 2023 10 7.37997e+00 1.72889e+00 705 2023 11 8.68613e+00 1.06680e+00 802 2023 12 6.29349e+00 3.07790e+00 355 2024 1 7.45185e+00 1.57181e+00 253 2024 2 6.88646e+00 1.24628e+00 715 2024 3 9.31618e+00 1.53343e+00 702 2024 4 nan nan 0