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 8.99251e+00 1.79686e+00 1012 2002 8 6.02749e+00 1.48081e+00 788 2002 9 4.69693e+00 1.47108e+00 989 2002 10 4.37939e+00 8.29095e-01 834 2002 11 3.12909e+00 4.05316e-01 918 2002 12 4.07811e+00 6.51586e-01 515 2003 1 4.99876e+00 4.93935e-01 768 2003 2 5.36898e+00 4.73326e-01 360 2003 3 6.39771e+00 8.29679e-01 567 2003 4 8.67746e+00 9.59302e-01 389 2003 5 6.96538e+00 1.79978e+00 323 2003 6 8.12102e+00 1.00606e+00 547 2003 7 9.03388e+00 7.72864e-01 384 2003 8 7.85331e+00 1.71677e+00 817 2003 9 4.06334e+00 1.35749e+00 1100 2003 10 3.60016e+00 6.78148e-01 677 2003 11 3.71412e+00 8.87275e-01 882 2003 12 3.90062e+00 4.79631e-01 574 2004 1 4.12320e+00 3.95941e-01 601 2004 2 4.74184e+00 5.46540e-01 573 2004 3 6.27406e+00 7.92975e-01 844 2004 4 8.68661e+00 1.57808e+00 324 2004 5 7.22483e+00 1.55178e+00 256 2004 6 8.15342e+00 1.16960e+00 713 2004 7 9.79069e+00 1.51203e+00 471 2004 8 4.92169e+00 1.47313e+00 1000 2004 9 3.76401e+00 7.71899e-01 726 2004 10 4.22325e+00 1.02580e+00 775 2004 11 3.43266e+00 4.18690e-01 256 2004 12 4.15598e+00 8.87989e-01 563 2005 1 4.81921e+00 2.88505e-01 513 2005 2 5.74190e+00 6.56507e-01 524 2005 3 7.04907e+00 7.14831e-01 673 2005 4 7.50868e+00 1.21108e+00 450 2005 5 9.47952e+00 8.96852e-01 256 2005 6 7.89312e+00 1.78652e+00 787 2005 7 7.58706e+00 2.00458e+00 311 2005 8 6.24093e+00 1.90778e+00 657 2005 9 3.71937e+00 9.05336e-01 1060 2005 10 3.92022e+00 6.49447e-01 999 2005 11 3.54461e+00 5.88498e-01 568 2005 12 3.71554e+00 5.31984e-01 986 2006 1 4.46685e+00 5.78106e-01 591 2006 2 5.21511e+00 6.79941e-01 401 2006 3 6.03097e+00 1.09918e+00 801 2006 4 9.35654e+00 2.09662e+00 589 2006 5 8.12614e+00 1.51267e+00 309 2006 6 1.02959e+01 1.83206e+00 774 2006 7 7.79252e+00 2.20835e+00 546 2006 8 6.32104e+00 2.67135e-01 63 2006 9 3.70795e+00 8.55459e-01 1049 2006 10 4.18313e+00 8.65681e-01 726 2006 11 3.81393e+00 5.56234e-01 940 2006 12 3.24645e+00 4.51582e-01 613 2007 1 4.32451e+00 4.47888e-01 822 2007 2 5.12563e+00 7.54337e-01 905 2007 3 6.37142e+00 6.56158e-01 566 2007 4 6.01791e+00 4.20237e-01 120 2007 5 6.84889e+00 2.77968e+00 140 2007 6 7.40504e+00 1.60167e+00 530 2007 7 4.81555e+00 1.00610e+00 166 2007 8 8.80649e+00 2.22976e+00 795 2007 9 4.89199e+00 1.84083e+00 1038 2007 10 4.25406e+00 5.60967e-01 790 2007 11 3.95848e+00 7.76236e-01 968 2007 12 3.77882e+00 5.80163e-01 573 2008 1 4.85051e+00 5.37664e-01 260 2008 2 5.05633e+00 7.86651e-01 534 2008 3 6.34250e+00 8.51078e-01 780 2008 4 9.85028e+00 1.76058e+00 362 2008 5 1.21277e+00 2.27649e-01 14 2008 6 9.39493e+00 2.18089e+00 113 2008 7 5.86450e+00 2.07985e+00 309 2008 8 6.37176e+00 1.34051e+00 118 2008 9 4.21366e+00 7.16287e-01 567 2008 10 3.60296e+00 7.80164e-01 772 2008 11 3.60139e+00 6.49396e-01 596 2008 12 4.20219e+00 5.58966e-01 896 2009 1 5.41932e+00 7.77518e-01 625 2009 2 5.49174e+00 5.48815e-01 317 2009 3 5.58820e+00 6.47090e-01 217 2009 4 8.65664e+00 6.10585e-01 126 2009 5 5.91143e+00 5.29844e-01 294 2009 6 9.04608e+00 1.19260e+00 256 2009 7 6.50763e+00 1.66763e+00 230 2009 8 7.31089e+00 1.81212e+00 315 2009 9 5.10279e+00 2.01512e+00 629 2009 10 4.07598e+00 8.61637e-01 509 2009 11 3.61270e+00 3.77106e-01 656 2009 12 4.25029e+00 7.49864e-01 527 2010 1 3.57398e+00 5.64808e-01 889 2010 2 5.86478e+00 1.21658e+00 530 2010 3 7.41479e+00 1.55648e+00 637 2010 4 8.37610e+00 1.19522e+00 256 2010 5 7.63638e+00 1.59627e+00 320 2010 6 1.01281e+01 1.34780e+00 255 2010 7 9.66048e+00 1.43007e+00 640 2010 8 9.25523e+00 1.85255e+00 247 2010 9 5.37299e+00 1.20312e+00 510 2010 10 5.20355e+00 1.05111e+00 646 2010 11 4.11696e+00 6.30869e-01 1172 2010 12 4.20740e+00 3.98721e-01 810 2011 1 4.64918e+00 6.78280e-01 621 2011 2 5.68125e+00 6.72490e-01 320 2011 3 5.85798e+00 9.20534e-01 783 2011 4 5.30317e+00 1.02297e+00 188 2011 5 9.18888e+00 2.03709e+00 384 2011 6 7.85881e+00 9.80330e-01 195 2011 7 1.06380e+01 1.56265e+00 357 2011 8 8.40087e+00 2.14203e+00 826 2011 9 4.76340e+00 5.83676e-01 764 2011 10 4.61470e+00 4.89429e-01 896 2011 11 4.23755e+00 8.51070e-01 454 2011 12 4.39129e+00 6.75650e-01 1088 2012 1 5.31514e+00 5.28699e-01 771 2012 2 5.93681e+00 7.33197e-01 731 2012 3 6.93049e+00 7.69940e-01 575 2012 4 7.44114e+00 1.91172e+00 192 2012 5 1.35562e+01 7.32252e-01 64 2012 6 9.25900e+00 1.46525e+00 320 2012 7 9.35003e+00 9.48906e-01 382 2012 8 8.47376e+00 1.67547e+00 311 2012 9 4.77508e+00 1.29619e+00 717 2012 10 5.43558e+00 7.94161e-01 632 2012 11 4.91537e+00 8.96683e-01 603 2012 12 4.75242e+00 5.41732e-01 308 2013 1 4.64833e+00 8.78003e-01 711 2013 2 5.78824e+00 9.25826e-01 723 2013 3 6.48039e+00 1.03779e+00 704 2013 4 1.14871e+01 2.12252e+00 203 2013 5 1.09862e+01 6.04236e-01 362 2013 6 1.04424e+01 1.59364e+00 448 2013 7 1.07734e+01 1.90547e+00 543 2013 8 8.22533e+00 1.52212e+00 742 2013 9 5.96534e+00 1.62552e+00 931 2013 10 4.19464e+00 7.53176e-01 870 2013 11 4.57477e+00 7.22545e-01 638 2013 12 5.69228e+00 1.14565e+00 787 2014 1 6.29078e+00 9.16278e-01 662 2014 2 6.44573e+00 5.67494e-01 607 2014 3 9.41789e+00 1.22716e+00 698 2014 4 8.88813e+00 2.51648e+00 482 2014 5 9.48700e+00 1.28928e+00 384 2014 6 1.03526e+01 1.73566e+00 819 2014 7 8.71130e+00 1.39009e+00 774 2014 8 6.92102e+00 2.31458e+00 511 2014 9 6.07899e+00 1.85920e+00 1203 2014 10 4.77775e+00 8.51801e-01 996 2014 11 3.97886e+00 5.87393e-01 881 2014 12 4.79480e+00 7.44970e-01 961 2015 1 5.60774e+00 6.35909e-01 720 2015 2 5.66279e+00 8.06080e-01 511 2015 3 7.22461e+00 9.38645e-01 518 2015 4 5.75674e+00 1.39395e+00 384 2015 5 8.14439e+00 1.74393e+00 234 2015 6 9.19936e+00 9.28113e-01 829 2015 7 6.74088e+00 8.85546e-01 319 2015 8 9.81628e+00 1.64190e+00 722 2015 9 4.19203e+00 6.89108e-01 690 2015 10 3.73943e+00 6.14782e-01 572 2015 11 4.15182e+00 6.94057e-01 773 2015 12 4.26825e+00 3.80862e-01 741 2016 1 5.44322e+00 4.88761e-01 768 2016 2 6.16584e+00 4.39149e-01 1153 2016 3 8.52873e+00 8.49229e-01 594 2016 4 9.92305e+00 1.52488e+00 709 2016 5 8.56379e+00 2.64109e+00 632 2016 6 1.20641e+01 2.15301e+00 576 2016 7 9.41819e+00 1.50926e+00 554 2016 8 1.17598e+01 1.45585e+00 660 2016 9 5.09358e+00 1.00738e+00 772 2016 10 4.21087e+00 6.58302e-01 1041 2016 11 3.89802e+00 4.30699e-01 687 2016 12 4.67428e+00 7.31783e-01 576 2017 1 5.10652e+00 7.44451e-01 685 2017 2 5.31127e+00 5.70890e-01 581 2017 3 7.29560e+00 1.22431e+00 627 2017 4 9.14387e+00 1.03567e+00 214 2017 5 8.20129e+00 2.35330e+00 249 2017 6 1.08219e+01 2.28327e+00 996 2017 7 9.45887e+00 1.77605e+00 512 2017 8 8.82668e+00 3.04474e+00 713 2017 9 4.39268e+00 8.14861e-01 676 2017 10 4.46016e+00 1.15392e+00 824 2017 11 3.75606e+00 5.07245e-01 763 2017 12 4.25264e+00 9.14785e-01 885 2018 1 5.07077e+00 9.12003e-01 960 2018 2 5.18480e+00 6.49704e-01 468 2018 3 6.27870e+00 1.09174e+00 832 2018 4 7.98760e+00 1.66126e+00 387 2018 5 8.82556e+00 8.85460e-01 343 2018 6 8.07846e+00 1.54256e+00 574 2018 7 9.74636e+00 1.61060e+00 693 2018 8 6.64258e+00 2.56569e+00 785 2018 9 6.01929e+00 1.64961e+00 941 2018 10 4.14273e+00 8.99950e-01 439 2018 11 3.72976e+00 4.03767e-01 409 2018 12 4.90379e+00 7.40105e-01 766 2019 1 4.66561e+00 6.31539e-01 320 2019 2 5.57384e+00 5.29923e-01 704 2019 3 5.90130e+00 4.92250e-01 969 2019 4 9.61840e+00 1.56827e+00 671 2019 5 8.39406e+00 1.59598e+00 710 2019 6 1.04161e+01 2.61200e+00 958 2019 7 1.01349e+01 1.25218e+00 874 2019 8 8.53932e+00 2.53653e+00 886 2019 9 5.76018e+00 1.27852e+00 967 2019 10 4.30874e+00 8.27139e-01 703 2019 11 3.68623e+00 7.17736e-01 664 2019 12 4.12984e+00 3.45747e-01 308 2020 1 5.01874e+00 6.41354e-01 738 2020 2 5.10770e+00 7.44770e-01 768 2020 3 6.33845e+00 7.89104e-01 654 2020 4 9.56858e+00 1.26694e+00 445 2020 5 8.25538e+00 1.33494e+00 571 2020 6 9.33067e+00 9.91610e-01 960 2020 7 9.20711e+00 1.24857e+00 720 2020 8 7.00383e+00 1.26099e+00 445 2020 9 4.89625e+00 1.04279e+00 896 2020 10 4.35440e+00 5.82436e-01 1353 2020 11 4.07596e+00 6.92798e-01 543 2020 12 3.86851e+00 4.83241e-01 512 2021 1 4.79142e+00 5.47686e-01 1033 2021 2 5.68146e+00 4.33218e-01 768 2021 3 6.32449e+00 7.46269e-01 457 2021 4 9.73320e+00 1.48361e+00 320 2021 5 1.11340e+01 2.11413e+00 516 2021 6 1.01802e+01 1.72118e+00 763 2021 7 1.02634e+01 1.15095e+00 949 2021 8 7.33555e+00 1.86292e+00 774 2021 9 4.39904e+00 5.21631e-01 1023 2021 10 4.14708e+00 8.92748e-01 1215 2021 11 4.18669e+00 6.30710e-01 765 2021 12 4.50405e+00 6.94395e-01 452 2022 1 5.45372e+00 9.22810e-01 522 2022 2 5.94665e+00 5.51170e-01 832 2022 3 5.79024e+00 7.13979e-01 377 2022 4 6.96834e+00 5.52318e-01 64 2022 5 1.08660e+01 9.83954e-01 310 2022 6 1.15859e+01 1.18068e+00 490 2022 7 1.18817e+01 1.15146e+00 367 2022 8 8.50583e+00 1.09997e+00 516 2022 9 6.41867e+00 1.53637e+00 960 2022 10 5.37986e+00 6.74466e-01 798 2022 11 4.30161e+00 1.06076e+00 495 2022 12 4.97194e+00 7.18322e-01 703 2023 1 4.91770e+00 6.46519e-01 321 2023 2 5.08727e+00 1.65165e+00 576 2023 3 8.16769e+00 5.65298e-01 1017 2023 4 8.51234e+00 1.29495e+00 785 2023 5 9.35760e+00 6.79218e-01 468 2023 6 9.72209e+00 8.05515e-01 957 2023 7 1.03227e+01 1.15579e+00 896 2023 8 8.21243e+00 9.08013e-01 658 2023 9 5.19488e+00 1.19613e+00 1069 2023 10 4.50085e+00 6.98698e-01 770 2023 11 3.90616e+00 1.02222e+00 552 2023 12 4.07013e+00 5.10642e-01 760 2024 1 5.03338e+00 6.35642e-01 953 2024 2 6.67212e+00 4.30476e-01 1018 2024 3 6.78481e+00 6.35349e-01 679 2024 4 7.93316e+00 1.68062e-01 128