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 3.46043e+01 6.53636e-01 44 2002 8 2.06287e+01 3.38136e+00 477 2002 9 2.26995e+01 2.20223e+00 322 2002 10 1.28602e+01 3.64221e+00 1024 2002 11 6.13062e+00 3.91431e+00 613 2002 12 8.35678e+00 4.73246e+00 768 2003 1 4.62038e+00 3.05675e+00 1122 2003 2 1.22210e+01 5.25850e+00 640 2003 3 2.14086e+01 2.53395e+00 320 2003 4 1.62236e+01 5.29099e+00 704 2003 5 2.53878e+01 3.90218e+00 847 2003 6 2.51499e+01 4.42899e+00 256 2003 7 3.30907e+01 1.89093e+00 419 2003 8 2.41552e+01 4.58766e+00 328 2003 9 1.48977e+01 3.51560e+00 448 2003 10 1.16399e+01 3.65506e+00 960 2003 11 8.03385e+00 4.63107e+00 1191 2003 12 5.21877e+00 4.27751e+00 832 2004 1 1.10041e+01 2.73223e+00 704 2004 2 1.47107e+01 5.53729e+00 499 2004 3 2.75368e+01 3.43280e+00 1085 2004 4 1.95910e+01 7.69175e+00 512 2004 5 3.23681e+01 4.27875e+00 632 2004 6 2.99150e+01 3.84537e+00 681 2004 7 3.28218e+01 8.05708e+00 407 2004 8 2.77489e+01 3.17987e+00 333 2004 9 1.08617e+01 8.90732e+00 367 2004 10 5.58032e+00 2.72542e+00 901 2004 11 1.30651e+01 5.28781e+00 883 2004 12 6.59861e+00 6.85332e+00 477 2005 1 4.60634e+00 5.35830e+00 758 2005 2 4.50371e+00 3.95807e+00 789 2005 3 9.55562e+00 4.35399e+00 413 2005 4 2.00377e+01 5.83519e+00 827 2005 5 3.21796e+01 3.69829e+00 749 2005 6 2.76289e+01 4.65484e+00 384 2005 7 1.47693e+01 1.15666e+01 695 2005 8 1.17665e+01 3.44109e+00 720 2005 9 1.27494e+00 1.78436e+00 448 2005 10 8.84325e-01 1.19403e+00 960 2005 11 1.04838e+00 1.28909e+00 874 2005 12 3.06160e+00 8.67375e-01 833 2006 1 1.04149e+01 7.53088e+00 496 2006 2 1.01926e+01 5.54260e+00 923 2006 3 1.94926e+01 3.94717e+00 1109 2006 4 3.06289e+01 1.91161e+00 705 2006 5 3.33983e+01 3.87722e+00 832 2006 6 2.91288e+01 4.60791e+00 645 2006 7 2.75781e+01 4.63139e+00 571 2006 8 2.59259e+01 4.76629e+00 469 2006 9 1.22212e+01 9.40718e+00 661 2006 10 7.03482e+00 2.75472e+00 891 2006 11 8.76783e+00 8.71885e+00 695 2006 12 7.15800e+00 5.24840e+00 396 2007 1 1.47187e+01 5.24980e+00 704 2007 2 1.65144e+01 6.11699e+00 672 2007 3 2.94159e+01 7.32404e+00 704 2007 4 1.93364e+01 9.86990e+00 921 2007 5 2.45700e+01 6.07743e+00 556 2007 6 3.11924e+01 2.39305e+00 431 2007 7 3.39315e+01 1.96286e+00 561 2007 8 3.08614e+01 2.93264e+00 725 2007 9 1.91813e+01 6.32580e+00 792 2007 10 2.19684e+01 1.67810e+00 582 2007 11 1.55162e+01 4.00286e+00 1024 2007 12 1.65177e+01 7.83800e+00 985 2008 1 1.38216e+01 6.94425e+00 704 2008 2 2.24365e+01 8.46345e+00 704 2008 3 2.02587e+01 9.41615e+00 796 2008 4 2.86286e+01 4.50640e+00 896 2008 5 2.03021e+01 4.82167e+00 680 2008 6 3.45453e+01 2.56165e+00 762 2008 7 2.77754e+01 4.48644e+00 384 2008 8 3.03043e+01 1.36419e+00 163 2008 9 1.46204e+01 6.75376e+00 448 2008 10 1.73559e+01 4.75975e+00 877 2008 11 1.27932e+01 3.73906e+00 1042 2008 12 1.30212e+01 8.69456e+00 1318 2009 1 1.48667e+01 8.31252e+00 816 2009 2 2.01667e+01 8.91023e+00 1024 2009 3 2.33901e+01 8.48491e+00 1152 2009 4 1.95226e+01 4.03360e+00 635 2009 5 2.69298e+01 5.15173e+00 818 2009 6 2.52767e+01 4.13740e+00 252 2009 7 3.59812e+01 1.66979e+00 337 2009 8 3.32929e+01 6.07725e+00 384 2009 9 2.02115e+01 3.32368e+00 502 2009 10 1.78039e+01 4.45361e+00 938 2009 11 1.07793e+01 4.02742e+00 589 2009 12 6.89305e+00 5.44812e+00 301 2010 1 1.28913e+01 4.77376e+00 460 2010 2 7.88176e+00 4.89029e+00 559 2010 3 6.10195e+00 3.94850e+00 955 2010 4 1.58344e+01 9.75225e+00 704 2010 5 2.86850e+01 2.81886e+00 640 2010 6 3.43928e+01 2.26538e+00 708 2010 7 3.18943e+01 2.62696e+00 384 2010 8 2.51847e+01 5.04573e+00 549 2010 9 2.82047e+01 4.08333e+00 846 2010 10 2.07710e+01 4.05832e+00 1408 2010 11 1.68341e+01 3.98263e+00 1147 2010 12 3.44775e+00 3.55789e+00 706 2011 1 1.32238e+01 5.70002e+00 697 2011 2 1.88681e+01 4.71807e+00 704 2011 3 2.24531e+01 4.30297e+00 1069 2011 4 2.26022e+01 6.28621e+00 907 2011 5 1.20945e+01 7.04737e+00 881 2011 6 2.51530e+01 2.28567e+00 565 2011 7 3.43662e+01 3.90569e+00 510 2011 8 2.90485e+01 1.75069e+00 508 2011 9 1.75661e+01 5.16924e+00 384 2011 10 7.25022e+00 5.88255e+00 656 2011 11 1.36855e+01 6.21942e+00 1173 2011 12 1.27708e+01 5.16944e+00 1152 2012 1 1.19773e+01 8.01301e+00 884 2012 2 1.65215e+01 7.19127e+00 677 2012 3 2.53825e+01 4.71793e+00 1029 2012 4 2.15156e+01 2.75794e+00 676 2012 5 2.96457e+01 1.79875e+00 553 2012 6 1.29531e+01 1.31227e+01 192 2012 7 2.49720e+01 3.04649e+00 343 2012 8 3.38508e+01 3.94017e+00 332 2012 9 1.66844e+01 5.94324e+00 448 2012 10 1.83901e+01 6.04834e+00 610 2012 11 1.04178e+01 4.73851e+00 912 2012 12 6.48049e+00 5.26177e+00 644 2013 1 1.30837e+01 7.28972e+00 1023 2013 2 1.30924e+01 6.39898e+00 704 2013 3 1.41719e+01 4.92472e+00 832 2013 4 2.89647e+01 3.32914e+00 640 2013 5 1.45218e+01 4.00790e+00 645 2013 6 2.48157e+01 4.29478e+00 592 2013 7 2.30931e+01 8.04261e+00 202 2013 8 2.46597e+01 4.61677e+00 639 2013 9 1.74856e+01 4.12430e+00 1020 2013 10 9.61790e+00 3.21389e+00 766 2013 11 1.26641e+01 7.45077e+00 511 2013 12 9.04130e+00 2.09828e+00 639 2014 1 2.59683e+00 2.23877e+00 441 2014 2 9.32570e+00 3.59300e+00 759 2014 3 1.07122e+01 4.41138e+00 686 2014 4 1.84213e+01 2.65954e+00 565 2014 5 2.45437e+01 5.38067e+00 774 2014 6 2.77707e+01 5.45748e+00 558 2014 7 2.96397e+01 4.26273e+00 426 2014 8 2.34543e+01 4.11893e+00 704 2014 9 1.47574e+01 6.70018e+00 272 2014 10 1.33253e+01 4.00938e+00 995 2014 11 7.11690e+00 4.96187e+00 937 2014 12 8.98949e+00 2.56219e+00 952 2015 1 5.83018e+00 4.71295e+00 712 2015 2 7.65666e+00 2.23909e+00 640 2015 3 2.47131e+01 4.56897e+00 1160 2015 4 2.61060e+01 2.61644e+00 576 2015 5 1.45647e+01 5.31822e+00 1088 2015 6 2.19799e+01 3.24193e+00 448 2015 7 1.92720e+01 4.30314e+00 262 2015 8 1.91657e+01 5.37417e+00 572 2015 9 1.76449e+01 5.41311e+00 322 2015 10 6.44689e+00 1.45619e+00 731 2015 11 8.34355e+00 2.63309e+00 896 2015 12 1.20170e+01 6.99620e+00 517 2016 1 4.19355e+00 5.01750e+00 424 2016 2 3.19911e+00 3.96439e+00 998 2016 3 1.53749e+01 8.30724e+00 708 2016 4 2.05232e+01 2.25942e+00 768 2016 5 1.78156e+01 5.19830e+00 832 2016 6 2.40074e+01 7.75078e+00 556 2016 7 2.41117e+01 4.92741e+00 650 2016 8 2.05569e+01 4.31831e+00 646 2016 9 1.83069e+01 9.33498e+00 636 2016 10 1.64919e+01 5.60329e+00 896 2016 11 1.75265e+01 3.54933e+00 960 2016 12 1.90523e+01 2.32190e+00 784 2017 1 1.22635e+01 8.66837e+00 832 2017 2 1.94793e+01 5.79880e+00 1208 2017 3 2.36815e+01 5.19641e+00 1109 2017 4 2.74433e+01 3.49169e+00 607 2017 5 1.64774e+01 5.76268e+00 707 2017 6 2.51831e+01 3.76200e+00 256 2017 7 3.05129e+01 4.11954e+00 487 2017 8 1.79508e+01 4.42320e+00 673 2017 9 6.98893e+00 6.12754e+00 909 2017 10 5.24685e+00 3.91285e+00 747 2017 11 7.30827e+00 2.22858e+00 1024 2017 12 1.23467e+01 5.93653e+00 781 2018 1 4.96908e+00 4.04312e+00 625 2018 2 2.28635e+01 5.22889e+00 960 2018 3 2.24114e+01 9.76879e+00 944 2018 4 2.55013e+01 7.93882e+00 929 2018 5 3.11090e+01 3.96527e+00 512 2018 6 2.48416e+01 3.13306e+00 379 2018 7 2.83404e+01 2.10201e+00 512 2018 8 2.70288e+01 6.05133e+00 920 2018 9 1.76105e+01 1.14405e+01 944 2018 10 1.23233e+01 1.22387e+01 1024 2018 11 7.62796e+00 3.67166e+00 590 2018 12 6.49209e+00 4.50654e+00 613 2019 1 8.19010e+00 5.10181e+00 705 2019 2 2.37661e+01 4.57180e+00 768 2019 3 2.26053e+01 4.21568e+00 960 2019 4 2.07461e+01 8.01324e+00 701 2019 5 2.97178e+01 2.42162e+00 1152 2019 6 2.89761e+01 3.28133e+00 534 2019 7 2.23593e+01 5.62807e+00 575 2019 8 1.60847e+01 4.49684e+00 534 2019 9 1.82161e+01 5.44517e+00 760 2019 10 1.34926e+01 6.47579e+00 901 2019 11 8.46663e+00 2.57764e+00 494 2019 12 9.43929e+00 1.18626e+00 341 2020 1 1.01900e+01 5.60243e+00 829 2020 2 1.35338e+01 6.61348e+00 704 2020 3 2.91278e+01 7.41049e+00 832 2020 4 3.16172e+01 6.60571e+00 448 2020 5 2.75261e+01 4.08199e+00 710 2020 6 2.42786e+01 4.15931e+00 418 2020 7 2.08430e+01 6.22025e+00 483 2020 8 2.56909e+01 2.79060e+00 256 2020 9 1.67582e+01 5.55660e+00 354 2020 10 9.90963e+00 3.31730e+00 889 2020 11 4.62728e+00 3.48103e+00 882 2020 12 3.43527e+00 3.03145e+00 768 2021 1 9.05346e+00 4.70593e+00 709 2021 2 1.99698e+01 6.68731e+00 832 2021 3 2.46669e+01 3.20015e+00 861 2021 4 2.28562e+01 4.67974e+00 875 2021 5 2.73993e+01 3.92629e+00 834 2021 6 2.25744e+01 3.42665e+00 320 2021 7 2.08887e+01 8.41951e+00 450 2021 8 2.23470e+01 3.90617e+00 516 2021 9 8.67805e+00 4.71369e+00 577 2021 10 8.76116e+00 6.46796e+00 909 2021 11 6.94502e+00 3.88319e+00 832 2021 12 9.46591e+00 6.03626e+00 896 2022 1 4.24400e+00 3.95191e+00 780 2022 2 1.32765e+01 5.93921e+00 1088 2022 3 1.63404e+01 6.83909e+00 755 2022 4 2.87218e+01 1.70746e+00 384 2022 5 3.28257e+01 3.82708e+00 576 2022 6 2.79926e+01 2.66468e+00 512 2022 7 2.30889e+01 8.53538e+00 490 2022 8 1.06519e+01 2.92329e+00 331 2022 9 1.19369e+01 6.21971e+00 570 2022 10 8.68853e+00 4.72307e+00 1163 2022 11 1.51009e+01 5.15715e+00 870 2022 12 1.50654e+01 3.12698e+00 768 2023 1 1.72971e+01 6.78439e+00 842 2023 2 1.92249e+01 9.35082e+00 1152 2023 3 2.61688e+01 4.35452e+00 960 2023 4 2.99860e+01 4.69512e+00 384 2023 5 2.49500e+01 8.93880e+00 583 2023 6 2.66729e+01 4.00346e+00 624 2023 7 1.93397e+01 4.27572e+00 624 2023 8 2.81985e+00 1.57423e+00 384 2023 9 1.07415e+01 4.62265e+00 606 2023 10 1.64333e+01 4.03020e+00 640 2023 11 1.64221e+01 4.91873e+00 818 2023 12 1.33798e+01 7.22072e+00 332 2024 1 1.17108e+01 3.50000e+00 326 2024 2 1.44782e+01 6.33015e+00 947 2024 3 2.48911e+01 4.72900e+00 489 2024 4 nan nan 0