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 1.52545e+00 9.63308e-01 839 2002 8 1.38013e+00 3.56681e-01 670 2002 9 1.82787e+00 5.01270e-01 1001 2002 10 2.95267e+00 1.02672e+00 461 2002 11 2.01596e+00 6.66254e-01 835 2002 12 1.62116e+00 2.03023e-01 378 2003 1 1.64600e+00 5.72329e-01 873 2003 2 1.89516e+00 7.17073e-01 576 2003 3 1.06650e+00 2.66978e-01 448 2003 4 1.75896e+00 7.19468e-01 236 2003 5 1.07174e+00 4.24879e-01 63 2003 6 1.22847e+00 8.61325e-01 570 2003 7 1.50120e+00 8.53225e-01 370 2003 8 1.50046e+00 5.51313e-01 627 2003 9 2.22407e+00 9.47359e-01 763 2003 10 2.76736e+00 1.68313e+00 796 2003 11 2.70472e+00 6.89874e-01 603 2003 12 1.62252e+00 6.12215e-01 545 2004 1 2.32560e+00 9.25515e-01 494 2004 2 2.90508e+00 2.04664e+00 536 2004 3 1.93368e+00 6.43739e-01 620 2004 4 1.57588e+00 8.78171e-01 256 2004 5 1.03778e+00 3.29563e-01 322 2004 6 1.09148e+00 7.76892e-01 690 2004 7 1.54800e+00 8.06857e-01 758 2004 8 1.81601e+00 8.30343e-01 949 2004 9 2.22008e+00 5.86655e-01 751 2004 10 1.96302e+00 9.34430e-01 544 2004 11 3.19989e+00 1.14057e+00 256 2004 12 2.40084e+00 1.77975e+00 595 2005 1 1.69456e+00 3.60175e-01 640 2005 2 2.81782e+00 1.03458e+00 458 2005 3 2.05488e+00 1.44528e+00 724 2005 4 1.24570e+00 4.13601e-01 383 2005 5 1.50817e+00 6.50927e-01 305 2005 6 1.21577e+00 9.05226e-01 427 2005 7 9.85303e-01 7.64245e-01 69 2005 8 1.94712e+00 1.19988e+00 637 2005 9 3.63859e+00 3.46676e+00 911 2005 10 2.29043e+00 9.69027e-01 1039 2005 11 2.44756e+00 1.20434e+00 446 2005 12 1.87506e+00 4.54693e-01 915 2006 1 2.28190e+00 1.08665e+00 591 2006 2 1.40027e+01 1.01786e+01 397 2006 3 3.16899e+00 3.44298e+00 778 2006 4 2.13046e+00 2.35955e+00 442 2006 5 1.84498e+00 8.93774e-01 126 2006 6 1.47403e+00 6.30704e-01 782 2006 7 2.01941e+00 1.37957e+00 246 2006 8 2.18329e+00 1.64496e+00 403 2006 9 2.27168e+00 4.50778e-01 1019 2006 10 1.88764e+00 4.13681e-01 824 2006 11 3.03261e+00 1.94390e+00 770 2006 12 1.82640e+00 2.74999e-01 758 2007 1 1.59084e+00 3.86930e-01 991 2007 2 1.40039e+00 5.72180e-01 752 2007 3 1.63486e+00 5.02631e-01 614 2007 4 2.71964e+00 6.09718e-01 179 2007 5 1.73519e+00 4.15402e-01 61 2007 6 1.75339e+00 8.80387e-01 643 2007 7 1.87609e+00 1.16551e+00 303 2007 8 1.81791e+00 1.15443e+00 658 2007 9 3.10434e+00 1.86918e+00 746 2007 10 3.13662e+00 3.21006e+00 680 2007 11 2.60046e+00 1.64005e+00 788 2007 12 2.30490e+00 7.21756e-01 749 2008 1 2.63803e+00 7.93200e-01 457 2008 2 2.49975e+00 4.82555e-01 391 2008 3 2.12303e+00 8.60382e-01 459 2008 4 9.86631e-01 4.02125e-01 248 2008 5 9.01072e-01 2.48735e-01 64 2008 6 2.08290e+00 1.68744e+00 94 2008 7 3.05128e+00 1.64762e+00 223 2008 8 3.50758e+00 3.29782e+00 151 2008 9 3.37708e+00 2.32711e+00 158 2008 10 3.34774e+00 1.07640e+00 524 2008 11 1.94975e+00 5.75939e-01 561 2008 12 1.75916e+00 9.65676e-01 905 2009 1 1.59889e+00 2.97056e-01 715 2009 2 1.33745e+00 4.02202e-01 225 2009 3 1.50505e+00 3.02505e-01 338 2009 4 1.85038e+00 3.86900e-01 79 2009 5 2.22863e+00 1.36217e+00 135 2009 6 1.20930e+00 5.59059e-01 365 2009 7 1.16261e+00 2.29382e-01 213 2009 8 1.86170e+00 6.13313e-01 248 2009 9 3.55960e+00 2.99762e+00 419 2009 10 3.49431e+00 8.98610e-01 259 2009 11 2.04499e+00 8.38942e-01 301 2009 12 1.81191e+00 9.07854e-01 632 2010 1 1.59474e+00 3.68246e-01 850 2010 2 1.46408e+00 3.62777e-01 453 2010 3 1.18021e+00 4.15705e-01 378 2010 4 1.39019e+00 2.54030e-01 190 2010 5 1.75773e+00 5.54296e-01 256 2010 6 1.78767e+00 1.03974e+00 247 2010 7 8.54013e-01 3.38103e-01 448 2010 8 1.34818e+00 4.03414e-01 122 2010 9 6.36170e+00 5.60615e+00 471 2010 10 3.83359e+00 3.73443e+00 889 2010 11 2.73089e+00 1.31727e+00 1128 2010 12 1.95357e+00 6.23852e-01 780 2011 1 1.52268e+00 2.10364e-01 608 2011 2 1.72191e+00 4.82891e-01 564 2011 3 1.59244e+00 4.71835e-01 536 2011 4 1.93147e+00 8.08812e-01 87 2011 5 1.79824e+00 5.24560e-01 128 2011 6 1.96937e+00 7.90783e-01 379 2011 7 2.15039e+00 1.44037e+00 192 2011 8 1.02592e+00 1.22303e+00 673 2011 9 1.61729e+00 9.49670e-01 666 2011 10 2.16666e+00 8.31495e-01 576 2011 11 2.02193e+00 3.51201e-01 459 2011 12 1.75676e+00 5.54945e-01 1016 2012 1 1.46554e+00 3.71665e-01 685 2012 2 1.91262e+00 4.42531e-01 553 2012 3 2.07440e+00 5.21079e-01 318 2012 4 9.75769e-01 2.27184e-01 192 2012 5 nan nan 0 2012 6 9.61371e-01 4.41690e-01 422 2012 7 9.54818e-01 3.39345e-01 128 2012 8 1.34724e+00 9.72943e-01 667 2012 9 2.63985e+00 1.17389e+00 744 2012 10 2.78810e+00 1.74972e+00 606 2012 11 2.34981e+00 1.36416e+00 583 2012 12 1.96347e+00 1.08838e+00 453 2013 1 1.38203e+00 3.68778e-01 551 2013 2 1.48324e+00 6.35645e-01 736 2013 3 1.47264e+00 4.76856e-01 547 2013 4 1.70827e+00 6.62406e-01 165 2013 5 9.94349e-01 5.14652e-01 256 2013 6 8.73935e-01 3.61248e-01 320 2013 7 9.90196e-01 4.44595e-01 433 2013 8 1.19556e+00 6.55246e-01 896 2013 9 2.01404e+00 8.95737e-01 854 2013 10 1.53919e+00 4.51376e-01 967 2013 11 1.53136e+00 4.06869e-01 554 2013 12 1.78293e+00 6.33272e-01 808 2014 1 1.40621e+00 4.43382e-01 790 2014 2 1.60864e+00 4.67937e-01 704 2014 3 1.56190e+00 6.75160e-01 691 2014 4 1.63404e+00 5.41406e-01 256 2014 5 1.09968e+00 5.98209e-01 464 2014 6 1.03857e+00 4.73876e-01 448 2014 7 1.59227e+00 7.76534e-01 586 2014 8 1.44928e+00 7.33632e-01 499 2014 9 1.73981e+00 3.82159e-01 921 2014 10 2.79782e+00 1.02104e+00 878 2014 11 2.05337e+00 7.79587e-01 882 2014 12 1.76476e+00 5.12468e-01 1212 2015 1 1.70600e+00 5.87930e-01 738 2015 2 1.23904e+00 3.77862e-01 576 2015 3 1.34806e+00 4.51315e-01 558 2015 4 1.12798e+00 3.64893e-01 241 2015 5 2.27296e+00 2.33639e+00 82 2015 6 1.32348e+00 5.64373e-01 609 2015 7 2.31391e+00 2.22957e+00 287 2015 8 1.66713e+00 1.07135e+00 334 2015 9 3.38602e+00 7.70950e-01 209 2015 10 2.49231e+00 8.19083e-01 192 2015 11 2.16663e+00 7.70124e-01 629 2015 12 2.05019e+00 7.34339e-01 749 2016 1 1.39503e+00 3.56879e-01 828 2016 2 1.08181e+00 1.94269e-01 1132 2016 3 2.96149e+00 1.60934e+00 460 2016 4 1.35602e+00 3.36190e-01 562 2016 5 8.77608e-01 3.49477e-01 401 2016 6 7.20342e-01 3.56569e-01 417 2016 7 1.75086e+00 1.57439e+00 725 2016 8 1.52472e+00 1.19263e+00 590 2016 9 4.71139e+00 4.50443e+00 769 2016 10 2.37335e+00 8.93312e-01 670 2016 11 2.03881e+00 8.42500e-01 627 2016 12 2.09879e+00 9.26837e-01 411 2017 1 1.48005e+00 2.80322e-01 752 2017 2 1.67553e+00 4.28963e-01 615 2017 3 1.75928e+00 7.19374e-01 369 2017 4 1.16109e+00 1.03159e+00 259 2017 5 1.03834e+00 1.88853e-01 128 2017 6 1.16638e+00 2.96186e-01 774 2017 7 3.29057e+00 2.16925e+00 347 2017 8 2.56497e+00 1.98423e+00 483 2017 9 1.62808e+01 1.01885e+01 404 2017 10 6.42670e+00 7.43806e+00 449 2017 11 2.01332e+00 5.33478e-01 653 2017 12 1.93566e+00 5.91352e-01 849 2018 1 1.46729e+00 4.15957e-01 896 2018 2 1.46999e+00 3.02631e-01 679 2018 3 2.99925e+00 1.67185e+00 641 2018 4 2.48966e+00 5.48888e-01 265 2018 5 2.34299e+00 1.43088e+00 285 2018 6 7.85427e-01 6.22355e-02 64 2018 7 1.47077e+00 6.18543e-01 434 2018 8 1.23453e+00 4.84409e-01 704 2018 9 2.85725e+00 6.68570e+00 561 2018 10 3.17411e+00 2.03499e+00 381 2018 11 1.90387e+00 5.24904e-01 405 2018 12 1.96683e+00 4.03264e-01 528 2019 1 2.06470e+00 2.66502e-01 264 2019 2 1.80031e+00 6.89340e-01 609 2019 3 1.55366e+00 6.11164e-01 875 2019 4 2.76121e+00 4.00591e+00 491 2019 5 1.69961e+00 4.84671e-01 590 2019 6 1.42197e+00 7.15659e-01 764 2019 7 1.20348e+00 5.06045e-01 502 2019 8 1.25105e+00 4.66670e-01 911 2019 9 2.06144e+00 1.55836e+00 1172 2019 10 2.50203e+00 5.70110e-01 748 2019 11 2.03287e+00 3.41411e-01 640 2019 12 2.25867e+00 4.55619e-01 659 2020 1 2.40148e+00 8.23267e-01 819 2020 2 2.10890e+00 7.23046e-01 683 2020 3 2.14546e+00 8.32324e-01 797 2020 4 2.26112e+00 1.07151e+00 356 2020 5 1.57137e+00 8.58068e-01 254 2020 6 9.24149e-01 4.39613e-01 777 2020 7 9.80634e-01 4.11081e-01 683 2020 8 8.82664e-01 3.69377e-01 476 2020 9 3.17943e+00 2.24282e+00 956 2020 10 2.88035e+00 1.79087e+00 1345 2020 11 2.40145e+00 6.83032e-01 704 2020 12 3.15272e+00 1.30258e+00 463 2021 1 2.19245e+00 5.19277e-01 719 2021 2 2.10135e+00 5.20311e-01 785 2021 3 2.13977e+00 4.87506e-01 573 2021 4 1.28633e+00 2.67966e-01 113 2021 5 1.00663e+00 4.84829e-01 396 2021 6 1.27478e+00 5.87583e-01 509 2021 7 7.85543e-01 2.61061e-01 862 2021 8 1.95074e+00 1.85854e+00 599 2021 9 3.01241e+00 1.37232e+00 1085 2021 10 1.73122e+00 2.98715e-01 1270 2021 11 2.02199e+00 6.19015e-01 669 2021 12 1.85442e+00 5.25839e-01 507 2022 1 1.50984e+00 2.90175e-01 592 2022 2 1.52037e+00 3.62384e-01 866 2022 3 2.16978e+00 6.57290e-01 512 2022 4 3.83041e+00 3.90524e-01 61 2022 5 1.21775e+00 4.54740e-01 181 2022 6 1.42086e+00 7.18751e-01 486 2022 7 7.05533e-01 3.11077e-01 122 2022 8 1.66607e+00 1.88987e+00 327 2022 9 3.58777e+00 8.08732e+00 599 2022 10 1.82337e+00 3.38170e-01 1054 2022 11 1.72122e+00 2.10397e-01 314 2022 12 1.58181e+00 3.79622e-01 682 2023 1 1.21023e+00 2.52032e-01 592 2023 2 1.83736e+00 6.61531e-01 512 2023 3 1.24180e+00 1.96761e-01 834 2023 4 8.92197e-01 2.10632e-01 899 2023 5 8.73815e-01 2.08102e-01 330 2023 6 8.03432e-01 2.62748e-01 691 2023 7 9.09703e-01 4.27351e-01 960 2023 8 1.37279e+00 1.65520e+00 611 2023 9 3.78741e+00 2.06084e+00 885 2023 10 3.15226e+00 1.74623e+00 742 2023 11 2.06575e+00 5.24047e-01 718 2023 12 1.83275e+00 3.60653e-01 742 2024 1 1.81531e+00 5.21814e-01 1093 2024 2 1.51043e+00 2.30274e-01 1024 2024 3 1.80173e+00 6.18171e-01 763 2024 4 1.11787e+00 3.85546e-01 162