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 1.55996e+01 1.79556e+00 214 2002 8 1.31587e+01 6.03521e-01 468 2002 9 1.11179e+01 1.85515e+00 593 2002 10 9.21236e+00 1.08409e+00 1110 2002 11 8.06704e+00 2.69154e+00 620 2002 12 7.82284e+00 1.37739e+00 769 2003 1 8.95486e+00 1.03527e+00 879 2003 2 9.11815e+00 9.39316e-01 561 2003 3 1.02026e+01 6.48790e-01 408 2003 4 9.28882e+00 1.37041e+00 576 2003 5 1.36546e+01 1.59425e+00 866 2003 6 1.44954e+01 1.69929e+00 268 2003 7 1.51388e+01 1.20535e+00 439 2003 8 1.33843e+01 1.65019e+00 368 2003 9 8.24595e+00 1.83487e+00 509 2003 10 8.84099e+00 2.21383e+00 834 2003 11 8.77459e+00 2.44535e+00 922 2003 12 6.75347e+00 1.60647e+00 837 2004 1 9.26703e+00 1.25025e+00 896 2004 2 1.11377e+01 1.56939e+00 623 2004 3 1.40322e+01 1.45461e+00 1022 2004 4 1.06621e+01 1.57320e+00 562 2004 5 1.40773e+01 1.42851e+00 896 2004 6 1.52580e+01 2.08349e+00 632 2004 7 1.43893e+01 2.42852e+00 581 2004 8 1.14103e+01 1.48138e+00 451 2004 9 8.50571e+00 1.49865e+00 403 2004 10 6.95194e+00 7.42095e-01 1112 2004 11 8.46505e+00 1.76826e+00 1088 2004 12 7.02780e+00 1.83814e+00 454 2005 1 7.69796e+00 1.61362e+00 967 2005 2 7.63012e+00 2.87701e+00 960 2005 3 1.06163e+01 1.75896e+00 393 2005 4 1.31781e+01 1.52864e+00 757 2005 5 1.43108e+01 1.05767e+00 646 2005 6 1.19976e+01 1.13748e+00 448 2005 7 1.06479e+01 3.80765e+00 598 2005 8 8.71701e+00 2.45862e+00 810 2005 9 4.83986e+00 1.79416e+00 415 2005 10 5.26025e+00 1.37122e+00 874 2005 11 4.73562e+00 1.79929e+00 1047 2005 12 5.70441e+00 1.04788e+00 791 2006 1 7.79703e+00 2.24450e+00 681 2006 2 9.16407e+00 2.00788e+00 768 2006 3 1.17271e+01 8.20889e-01 1033 2006 4 1.39972e+01 7.80548e-01 890 2006 5 1.38273e+01 9.32984e-01 786 2006 6 1.25141e+01 1.60524e+00 887 2006 7 1.34057e+01 1.16426e+00 574 2006 8 1.57876e+01 9.96264e-01 400 2006 9 1.22301e+01 2.55040e+00 776 2006 10 6.31815e+00 1.15870e+00 955 2006 11 7.52851e+00 1.27687e+00 755 2006 12 7.57627e+00 1.72204e+00 448 2007 1 9.69414e+00 1.11734e+00 641 2007 2 8.82595e+00 1.50357e+00 704 2007 3 1.32987e+01 1.75633e+00 576 2007 4 9.75098e+00 3.00929e+00 829 2007 5 1.24622e+01 1.46778e+00 645 2007 6 1.48741e+01 2.71751e+00 531 2007 7 1.44703e+01 1.35623e+00 438 2007 8 1.28277e+01 1.95891e+00 758 2007 9 9.85415e+00 1.76119e+00 778 2007 10 8.14148e+00 1.29186e+00 818 2007 11 8.75665e+00 9.41379e-01 1087 2007 12 8.87998e+00 2.37064e+00 1067 2008 1 8.88668e+00 2.08868e+00 624 2008 2 1.15199e+01 1.61641e+00 832 2008 3 1.06301e+01 3.61657e+00 704 2008 4 1.31320e+01 1.41657e+00 961 2008 5 1.37607e+01 1.59802e+00 640 2008 6 1.49145e+01 6.12669e-01 634 2008 7 1.41927e+01 2.13828e+00 501 2008 8 1.14665e+01 1.04131e+00 320 2008 9 7.21584e+00 2.64943e+00 330 2008 10 6.40276e+00 1.14152e+00 729 2008 11 8.55401e+00 9.98529e-01 1024 2008 12 8.15646e+00 2.31528e+00 1090 2009 1 9.24853e+00 1.97320e+00 832 2009 2 1.17648e+01 1.79197e+00 1099 2009 3 1.16034e+01 2.94927e+00 1152 2009 4 1.19402e+01 2.37671e+00 675 2009 5 1.48339e+01 9.64671e-01 590 2009 6 1.62567e+01 1.80763e+00 268 2009 7 1.53875e+01 1.57043e+00 334 2009 8 1.49619e+01 1.24515e+00 602 2009 9 1.23055e+01 1.54033e+00 697 2009 10 1.03785e+01 1.20261e+00 957 2009 11 8.85005e+00 1.34534e+00 417 2009 12 6.89810e+00 1.26338e+00 385 2010 1 8.35153e+00 1.51367e+00 496 2010 2 7.96047e+00 1.50113e+00 352 2010 3 8.59392e+00 2.23594e+00 1008 2010 4 1.16396e+01 6.06066e-01 767 2010 5 1.38271e+01 1.16480e+00 751 2010 6 1.49421e+01 9.92561e-01 832 2010 7 1.45200e+01 9.03979e-01 523 2010 8 1.35132e+01 9.81296e-01 761 2010 9 1.20239e+01 9.86970e-01 667 2010 10 1.11527e+01 8.16299e-01 1216 2010 11 9.40037e+00 5.44497e-01 964 2010 12 5.79948e+00 1.44458e+00 792 2011 1 8.47921e+00 8.67520e-01 538 2011 2 1.01570e+01 1.07171e+00 878 2011 3 1.15014e+01 7.58897e-01 1085 2011 4 1.12179e+01 1.89761e+00 859 2011 5 1.12017e+01 1.05030e+00 960 2011 6 1.20807e+01 1.08183e+00 600 2011 7 1.54906e+01 1.50465e+00 524 2011 8 1.35126e+01 9.76427e-01 293 2011 9 8.59871e+00 6.04090e-01 340 2011 10 7.83308e+00 2.05162e+00 767 2011 11 8.19503e+00 1.12243e+00 1075 2011 12 8.87765e+00 1.29429e+00 1014 2012 1 7.63736e+00 9.00400e-01 969 2012 2 1.03636e+01 1.41523e+00 594 2012 3 1.08978e+01 1.04294e+00 1163 2012 4 1.36444e+01 1.10815e+00 768 2012 5 1.26304e+01 8.13748e-01 512 2012 6 1.33240e+01 2.79398e+00 320 2012 7 1.32745e+01 2.12849e+00 468 2012 8 1.49905e+01 9.10714e-01 468 2012 9 1.25250e+01 3.32748e-01 407 2012 10 1.23413e+01 1.96173e+00 860 2012 11 9.60229e+00 6.91292e-01 952 2012 12 8.40252e+00 2.44625e+00 768 2013 1 8.89040e+00 1.11140e+00 860 2013 2 1.00205e+01 1.61886e+00 896 2013 3 1.13330e+01 1.98026e+00 882 2013 4 1.39977e+01 8.91720e-01 528 2013 5 9.52353e+00 1.52850e+00 721 2013 6 1.34667e+01 1.23248e+00 475 2013 7 1.39036e+01 2.30006e+00 292 2013 8 1.26331e+01 1.09275e+00 538 2013 9 9.78700e+00 2.08327e+00 686 2013 10 7.27823e+00 1.36639e+00 983 2013 11 8.85536e+00 8.68206e-01 320 2013 12 8.17790e+00 1.09026e+00 576 2014 1 6.00066e+00 1.63974e+00 449 2014 2 9.57498e+00 1.20174e+00 684 2014 3 1.07148e+01 1.08847e+00 704 2014 4 1.12685e+01 1.12574e+00 576 2014 5 1.30637e+01 1.08200e+00 892 2014 6 1.37750e+01 1.47299e+00 869 2014 7 1.36357e+01 8.00849e-01 283 2014 8 1.15883e+01 1.57200e+00 560 2014 9 9.56751e+00 6.04730e-01 320 2014 10 9.67060e+00 1.04060e+00 1056 2014 11 7.43380e+00 1.06928e+00 887 2014 12 7.36347e+00 6.28963e-01 688 2015 1 6.64617e+00 1.28603e+00 625 2015 2 8.43774e+00 9.75006e-01 896 2015 3 1.16748e+01 9.38027e-01 1024 2015 4 1.21446e+01 1.06915e+00 448 2015 5 7.93072e+00 1.18255e+00 1091 2015 6 1.21029e+01 1.04199e+00 640 2015 7 1.14517e+01 1.03154e+00 256 2015 8 1.21808e+01 1.47459e+00 612 2015 9 1.06636e+01 6.48574e-01 277 2015 10 8.81354e+00 9.83344e-01 634 2015 11 8.82975e+00 1.20929e+00 828 2015 12 9.53289e+00 1.44831e+00 198 2016 1 5.91500e+00 2.20769e+00 301 2016 2 7.07439e+00 2.34947e+00 896 2016 3 1.22526e+01 2.66319e+00 672 2016 4 1.15021e+01 1.02646e+00 959 2016 5 1.02048e+01 1.85101e+00 743 2016 6 1.46881e+01 1.85966e+00 640 2016 7 1.63213e+01 1.51739e+00 710 2016 8 1.21748e+01 1.52274e+00 640 2016 9 1.14693e+01 7.07207e-01 766 2016 10 1.06459e+01 1.43849e+00 1088 2016 11 1.05321e+01 9.61981e-01 1264 2016 12 1.06428e+01 6.50906e-01 917 2017 1 8.72976e+00 3.52225e+00 1154 2017 2 9.74614e+00 1.88528e+00 896 2017 3 1.20251e+01 1.40692e+00 1150 2017 4 1.33792e+01 7.05146e-01 576 2017 5 1.24045e+01 1.85618e+00 640 2017 6 1.33594e+01 1.45173e+00 238 2017 7 1.54199e+01 1.73093e+00 365 2017 8 1.24726e+01 9.60428e-01 450 2017 9 6.80154e+00 3.90940e+00 781 2017 10 6.07907e+00 6.55574e-01 768 2017 11 7.83344e+00 8.51416e-01 1019 2017 12 8.18109e+00 1.50118e+00 973 2018 1 7.88815e+00 1.28229e+00 607 2018 2 1.27105e+01 8.23759e-01 816 2018 3 1.26814e+01 1.38480e+00 1164 2018 4 1.21172e+01 1.73996e+00 1024 2018 5 1.41384e+01 1.46814e+00 398 2018 6 1.28655e+01 1.66541e+00 384 2018 7 1.10768e+01 2.16129e+00 402 2018 8 1.26003e+01 6.69741e-01 677 2018 9 1.03607e+01 1.58715e+00 831 2018 10 9.98468e+00 2.43130e+00 896 2018 11 1.01785e+01 2.60619e+00 575 2018 12 5.48461e+00 2.40325e+00 704 2019 1 7.38643e+00 1.78753e+00 896 2019 2 1.07971e+01 9.69741e-01 717 2019 3 1.13917e+01 1.25861e+00 838 2019 4 1.06716e+01 1.57779e+00 687 2019 5 1.31727e+01 9.20319e-01 943 2019 6 1.36936e+01 1.55422e+00 659 2019 7 1.13223e+01 1.93076e+00 691 2019 8 1.25412e+01 2.10688e+00 386 2019 9 9.41370e+00 9.29972e-01 830 2019 10 8.07047e+00 1.60559e+00 979 2019 11 6.24223e+00 1.03099e+00 573 2019 12 9.06179e+00 1.62656e+00 458 2020 1 9.34173e+00 1.97700e+00 718 2020 2 1.11764e+01 2.19646e+00 728 2020 3 1.43487e+01 1.00079e+00 905 2020 4 1.57794e+01 2.10761e+00 512 2020 5 1.35491e+01 2.07590e+00 576 2020 6 1.36103e+01 1.17392e+00 639 2020 7 1.36706e+01 2.29169e+00 301 2020 8 1.28357e+01 1.18448e+00 422 2020 9 9.46154e+00 1.54442e+00 345 2020 10 9.42459e+00 9.56774e-01 545 2020 11 6.85855e+00 1.78875e+00 721 2020 12 6.17566e+00 1.03355e+00 768 2021 1 7.97519e+00 1.12466e+00 768 2021 2 1.05555e+01 3.39453e+00 631 2021 3 1.22695e+01 9.57471e-01 909 2021 4 1.26245e+01 1.37654e+00 896 2021 5 1.34785e+01 1.30198e+00 1005 2021 6 1.33223e+01 1.76900e+00 373 2021 7 1.12396e+01 3.15966e+00 490 2021 8 1.21806e+01 2.55053e+00 640 2021 9 9.37573e+00 7.84125e-01 513 2021 10 8.54677e+00 1.72211e+00 707 2021 11 7.33989e+00 1.86577e+00 759 2021 12 1.03575e+01 1.11402e+00 884 2022 1 8.88669e+00 3.36653e+00 792 2022 2 9.22668e+00 1.79929e+00 1069 2022 3 1.04103e+01 1.52567e+00 885 2022 4 1.44722e+01 6.43108e-01 384 2022 5 1.53930e+01 9.75747e-01 832 2022 6 1.45646e+01 1.34016e+00 653 2022 7 1.25199e+01 1.01717e+00 534 2022 8 9.01761e+00 1.77755e+00 575 2022 9 9.45737e+00 8.34988e-01 448 2022 10 6.22360e+00 1.90580e+00 1244 2022 11 8.70841e+00 8.16375e-01 765 2022 12 8.26747e+00 5.52447e-01 869 2023 1 1.05137e+01 1.48267e+00 960 2023 2 9.49258e+00 2.84034e+00 1155 2023 3 1.41392e+01 1.86378e+00 1088 2023 4 1.54366e+01 1.73683e+00 384 2023 5 1.25922e+01 2.33540e+00 704 2023 6 1.45326e+01 1.22550e+00 527 2023 7 1.13308e+01 3.10360e+00 664 2023 8 7.02839e+00 1.46161e+00 550 2023 9 8.50897e+00 2.97195e+00 687 2023 10 9.19083e+00 1.07862e+00 657 2023 11 1.05165e+01 1.14988e+00 704 2023 12 7.63573e+00 2.57524e+00 445 2024 1 9.33456e+00 1.33636e+00 426 2024 2 1.06754e+01 1.39744e+00 832 2024 3 1.34178e+01 1.36996e+00 637 2024 4 nan nan 0