YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.84080e+01 1.57306e-01 32 2000 3 1.90733e+01 1.33101e+00 157 2000 4 2.15221e+01 5.85488e-01 140 2000 5 2.53904e+01 1.80913e+00 181 2000 6 2.72711e+01 1.07655e+00 149 2000 7 2.94651e+01 3.69171e-01 144 2000 8 2.82360e+01 2.34164e+00 60 2000 9 2.85789e+01 1.16341e+00 125 2000 10 2.55590e+01 8.86562e-01 240 2000 11 2.36454e+01 1.81693e+00 112 2000 12 1.99304e+01 1.33400e+00 208 2001 1 1.75456e+01 1.00970e+00 131 2001 2 1.68920e+01 1.66283e+00 48 2001 3 1.78543e+01 7.62991e-01 80 2001 4 2.07892e+01 2.37702e+00 157 2001 5 2.44098e+01 1.58977e+00 228 2001 6 2.55074e+01 6.38278e-01 48 2001 7 2.84190e+01 9.70998e-01 101 2001 8 2.82486e+01 7.89741e-01 160 2001 9 2.85077e+01 5.07051e-01 160 2001 10 2.50418e+01 1.29506e+00 208 2001 11 2.24772e+01 6.58337e-01 208 2001 12 2.19673e+01 1.12698e+00 180 2002 1 1.87904e+01 5.93855e-01 96 2002 2 1.80395e+01 3.70745e-01 64 2002 3 1.70088e+01 4.41054e-01 64 2002 4 2.05339e+01 1.77710e+00 110 2002 5 2.56098e+01 1.04371e+00 191 2002 6 2.69188e+01 7.21293e-01 123 2002 7 2.95976e+01 1.43776e+00 595 2002 8 2.91582e+01 1.22125e+00 513 2002 9 2.84109e+01 9.66720e-01 362 2002 10 2.78712e+01 1.30111e+00 413 2002 11 2.24435e+01 1.78293e+00 481 2002 12 1.88264e+01 1.80070e+00 435 2003 1 1.66013e+01 1.41094e+00 629 2003 2 1.68461e+01 5.00145e-01 318 2003 3 1.92667e+01 1.28780e+00 261 2003 4 2.08222e+01 1.95584e+00 555 2003 5 2.57496e+01 1.19738e+00 613 2003 6 2.76971e+01 1.22299e+00 446 2003 7 2.88843e+01 1.20134e+00 525 2003 8 2.83829e+01 1.02995e+00 556 2003 9 2.86467e+01 8.79344e-01 581 2003 10 2.55165e+01 1.15322e+00 639 2003 11 2.38876e+01 1.09182e+00 776 2003 12 1.96492e+01 1.33089e+00 536 2004 1 1.70714e+01 1.50953e+00 349 2004 2 1.68512e+01 1.25652e+00 263 2004 3 1.82453e+01 1.16540e+00 611 2004 4 1.99780e+01 1.20671e+00 536 2004 5 2.43615e+01 2.10838e+00 762 2004 6 2.82154e+01 1.72594e+00 528 2004 7 2.99910e+01 1.18317e+00 616 2004 8 2.89816e+01 1.40243e+00 513 2004 9 2.77918e+01 1.37071e+00 602 2004 10 2.56142e+01 1.15158e+00 650 2004 11 2.36078e+01 1.63641e+00 445 2004 12 2.02805e+01 1.36796e+00 460 2005 1 1.83399e+01 1.39790e+00 495 2005 2 1.77440e+01 1.14900e+00 268 2005 3 1.78484e+01 1.10297e+00 385 2005 4 2.06921e+01 1.21989e+00 663 2005 5 2.41664e+01 2.04002e+00 793 2005 6 2.76635e+01 1.44441e+00 722 2005 7 2.84751e+01 1.60840e+00 635 2005 8 2.95207e+01 1.37227e+00 616 2005 9 2.89131e+01 9.91941e-01 828 2005 10 2.68148e+01 1.20530e+00 889 2005 11 2.22791e+01 1.43406e+00 494 2005 12 1.95082e+01 1.32712e+00 506 2006 1 1.73815e+01 1.07180e+00 374 2006 2 1.68488e+01 1.06543e+00 388 2006 3 1.81987e+01 1.21931e+00 557 2006 4 2.19662e+01 2.19360e+00 622 2006 5 2.47197e+01 1.52066e+00 785 2006 6 2.85787e+01 1.61144e+00 744 2006 7 2.92072e+01 1.29651e+00 513 2006 8 3.00824e+01 1.16363e+00 685 2006 9 2.92161e+01 1.24751e+00 678 2006 10 2.67770e+01 1.43336e+00 654 2006 11 2.19181e+01 1.35956e+00 793 2006 12 1.96140e+01 1.26322e+00 325 2007 1 1.90255e+01 7.29336e-01 268 2007 2 1.74655e+01 1.09963e+00 394 2007 3 1.79655e+01 1.24186e+00 537 2007 4 2.04033e+01 1.63115e+00 534 2007 5 2.38313e+01 1.14770e+00 780 2007 6 2.70584e+01 1.57080e+00 625 2007 7 2.90142e+01 1.14201e+00 413 2007 8 2.98966e+01 1.28143e+00 750 2007 9 2.88033e+01 1.20585e+00 678 2007 10 2.64599e+01 1.50838e+00 677 2007 11 2.30328e+01 1.21792e+00 791 2007 12 2.07749e+01 9.22485e-01 537 2008 1 1.92130e+01 9.87411e-01 379 2008 2 1.82175e+01 9.84257e-01 585 2008 3 1.75957e+01 1.43714e+00 519 2008 4 2.08280e+01 1.09597e+00 574 2008 5 2.44814e+01 2.24397e+00 725 2008 6 2.93750e+01 1.45785e+00 685 2008 7 2.90031e+01 1.06631e+00 633 2008 8 2.78941e+01 1.31159e+00 494 2008 9 2.73908e+01 8.84789e-01 696 2008 10 2.56302e+01 1.03797e+00 717 2008 11 2.26339e+01 1.51945e+00 718 2008 12 1.86000e+01 1.13065e+00 456 2009 1 1.78086e+01 1.34845e+00 570 2009 2 1.73004e+01 8.53585e-01 532 2009 3 1.80869e+01 1.07366e+00 605 2009 4 2.08824e+01 1.53697e+00 657 2009 5 2.50763e+01 1.52817e+00 558 2009 6 2.81470e+01 1.55321e+00 784 2009 7 2.77199e+01 1.42126e+00 620 2009 8 2.88921e+01 1.29016e+00 602 2009 9 2.80360e+01 9.80530e-01 484 2009 10 2.66541e+01 1.41646e+00 485 2009 11 2.20101e+01 1.58641e+00 584 2009 12 1.77105e+01 1.42844e+00 260 2010 1 1.62338e+01 1.87383e+00 370 2010 2 1.51862e+01 7.87870e-01 409 2010 3 1.67016e+01 1.06109e+00 518 2010 4 2.00004e+01 1.44247e+00 541 2010 5 2.59855e+01 2.26332e+00 591 2010 6 3.05341e+01 1.66014e+00 818 2010 7 2.95416e+01 1.12630e+00 697 2010 8 2.97099e+01 1.53154e+00 562 2010 9 2.90072e+01 1.11040e+00 835 2010 10 2.56436e+01 1.16716e+00 1084 2010 11 2.30176e+01 1.21258e+00 630 2010 12 1.91518e+01 1.95857e+00 714 2011 1 1.61646e+01 1.50292e+00 570 2011 2 1.53324e+01 1.60596e+00 240 2011 3 1.89335e+01 1.85695e+00 557 2011 4 2.21788e+01 1.45819e+00 785 2011 5 2.49900e+01 1.52948e+00 900 2011 6 2.97574e+01 1.11239e+00 739 2011 7 2.97788e+01 1.81148e+00 556 2011 8 3.04726e+01 1.19547e+00 853 2011 9 2.79042e+01 9.77371e-01 767 2011 10 2.56932e+01 1.54556e+00 962 2011 11 2.23670e+01 1.18920e+00 575 2011 12 2.01765e+01 7.59553e-01 391 2012 1 1.76823e+01 1.45403e+00 495 2012 2 1.78033e+01 8.23598e-01 138 2012 3 2.00736e+01 1.85612e+00 557 2012 4 2.24782e+01 8.11155e-01 829 2012 5 2.64746e+01 1.82554e+00 855 2012 6 2.70509e+01 1.01033e+00 578 2012 7 2.88234e+01 9.83595e-01 475 2012 8 2.94784e+01 7.83959e-01 401 2012 9 2.74711e+01 1.12363e+00 651 2012 10 2.61257e+01 8.83184e-01 947 2012 11 2.21213e+01 1.27126e+00 699 2012 12 2.12521e+01 1.00072e+00 471 2013 1 1.82776e+01 8.48752e-01 358 2013 2 1.82241e+01 1.49011e+00 304 2013 3 1.79970e+01 1.02323e+00 615 2013 4 2.03811e+01 1.12087e+00 392 2013 5 2.32971e+01 1.56344e+00 681 2013 6 2.75486e+01 1.56075e+00 675 2013 7 2.84372e+01 9.21125e-01 428 2013 8 2.88016e+01 1.16608e+00 537 2013 9 2.93341e+01 1.06691e+00 696 2013 10 2.68605e+01 1.11617e+00 646 2013 11 2.33999e+01 2.10898e+00 468 2013 12 2.05443e+01 1.22542e+00 367 2014 1 1.74580e+01 1.61987e+00 341 2014 2 1.61508e+01 1.16532e+00 273 2014 3 1.67637e+01 8.84857e-01 344 2014 4 1.97648e+01 1.69054e+00 491 2014 5 2.45725e+01 1.75002e+00 631 2014 6 2.81351e+01 1.88922e+00 665 2014 7 2.84263e+01 1.27533e+00 761 2014 8 2.93870e+01 1.51708e+00 689 2014 9 2.91673e+01 1.34563e+00 514 2014 10 2.65520e+01 1.23872e+00 886 2014 11 2.22790e+01 1.92744e+00 625 2014 12 1.94648e+01 1.26030e+00 391 2015 1 1.87227e+01 1.08440e+00 379 2015 2 1.81224e+01 1.39844e+00 466 2015 3 1.95161e+01 1.48661e+00 406 2015 4 2.22053e+01 1.27108e+00 302 2015 5 2.50474e+01 1.81032e+00 720 2015 6 2.84469e+01 1.30580e+00 787 2015 7 2.93083e+01 1.42773e+00 610 2015 8 2.96916e+01 1.03974e+00 750 2015 9 2.88374e+01 1.31189e+00 599 2015 10 2.54945e+01 1.10893e+00 648 2015 11 2.35413e+01 1.55779e+00 521 2015 12 2.17297e+01 9.50247e-01 409 2016 1 1.98622e+01 1.33336e+00 436 2016 2 1.79836e+01 8.68292e-01 602 2016 3 1.85843e+01 1.54862e+00 468 2016 4 2.10175e+01 1.10775e+00 548 2016 5 2.49395e+01 1.64861e+00 582 2016 6 2.90762e+01 1.26642e+00 610 2016 7 3.03181e+01 1.11880e+00 712 2016 8 2.94745e+01 1.31743e+00 554 2016 9 2.94509e+01 1.07109e+00 740 2016 10 2.71805e+01 1.53447e+00 848 2016 11 2.39274e+01 1.40840e+00 674 2016 12 2.11127e+01 1.01996e+00 563 2017 1 1.86652e+01 9.75045e-01 390 2017 2 1.91566e+01 1.23693e+00 443 2017 3 1.97901e+01 1.14395e+00 598 2017 4 2.26378e+01 9.11238e-01 768 2017 5 2.45407e+01 1.21449e+00 638 2017 6 2.73246e+01 1.57896e+00 288 2017 7 2.95691e+01 1.45655e+00 773 2017 8 3.00847e+01 1.31942e+00 557 2017 9 2.80626e+01 1.29080e+00 623 2017 10 2.64643e+01 1.06500e+00 780 2017 11 2.32014e+01 1.14401e+00 702 2017 12 2.07480e+01 8.26382e-01 367 2018 1 1.89013e+01 1.37771e+00 552 2018 2 2.04019e+01 1.28293e+00 444 2018 3 2.01708e+01 1.33236e+00 569 2018 4 2.07606e+01 1.11396e+00 720 2018 5 2.61274e+01 2.23813e+00 817 2018 6 2.89767e+01 1.51468e+00 555 2018 7 2.91566e+01 1.16870e+00 629 2018 8 2.92252e+01 1.13377e+00 607 2018 9 2.93962e+01 1.23356e+00 591 2018 10 2.74859e+01 1.66676e+00 775 2018 11 2.36163e+01 1.57735e+00 262 2018 12 1.89560e+01 1.33556e+00 284 2019 1 1.82740e+01 1.30548e+00 374 2019 2 1.82059e+01 1.48775e+00 220 2019 3 1.86882e+01 7.72013e-01 512 2019 4 2.06372e+01 9.92862e-01 513 2019 5 2.64927e+01 1.79045e+00 790 2019 6 2.89570e+01 1.45827e+00 526 2019 7 2.98405e+01 1.32778e+00 679 2019 8 3.02763e+01 8.13209e-01 468 2019 9 2.95382e+01 9.54981e-01 826 2019 10 2.82942e+01 1.21178e+00 464 2019 11 2.31856e+01 1.00684e+00 536 2019 12 2.06934e+01 1.16890e+00 434 2020 1 1.92764e+01 1.13801e+00 392 2020 2 1.86100e+01 8.05695e-01 414 2020 3 2.12784e+01 2.75844e+00 539 2020 4 2.22850e+01 9.90381e-01 488 2020 5 2.41787e+01 1.46851e+00 668 2020 6 2.74117e+01 1.07738e+00 495 2020 7 2.93009e+01 1.01445e+00 552 2020 8 3.04812e+01 9.64948e-01 510 2020 9 2.85146e+01 1.91949e+00 525 2020 10 2.55694e+01 6.60249e-01 608 2020 11 2.42510e+01 1.06229e+00 673 2020 12 2.07890e+01 1.79190e+00 600 2021 1 1.77722e+01 2.02379e+00 533 2021 2 1.69446e+01 8.98715e-01 381 2021 3 1.89507e+01 8.81117e-01 471 2021 4 2.07077e+01 8.03422e-01 664 2021 5 2.38951e+01 1.33885e+00 555 2021 6 2.70133e+01 1.69754e+00 442 2021 7 2.98010e+01 1.66493e+00 463 2021 8 3.02590e+01 1.15572e+00 416 2021 9 2.82400e+01 1.02336e+00 562 2021 10 2.63500e+01 1.31725e+00 492 2021 11 2.28210e+01 1.19774e+00 809 2021 12 1.98934e+01 7.62642e-01 552 2022 1 1.78930e+01 1.67508e+00 541 2022 2 1.68099e+01 1.58909e+00 544 2022 3 1.87368e+01 9.94598e-01 661 2022 4 2.16448e+01 8.37678e-01 491 2022 5 2.52258e+01 9.28497e-01 644 2022 6 2.92681e+01 1.72513e+00 680 2022 7 2.99896e+01 1.20824e+00 597 2022 8 3.02742e+01 1.10273e+00 410 2022 9 2.96643e+01 8.66134e-01 802 2022 10 2.60550e+01 1.47919e+00 771 2022 11 2.28940e+01 1.19181e+00 523 2022 12 2.13552e+01 1.20097e+00 598 2023 1 1.94005e+01 1.27347e+00 604 2023 2 1.88685e+01 1.31676e+00 444 2023 3 2.09077e+01 1.06110e+00 559 2023 4 2.14451e+01 7.05960e-01 461 2023 5 2.46957e+01 1.66965e+00 706 2023 6 2.76499e+01 1.83161e+00 672 2023 7 3.03561e+01 1.32528e+00 680 2023 8 3.06413e+01 1.21320e+00 951 2023 9 3.03844e+01 8.72064e-01 754 2023 10 2.61606e+01 1.84708e+00 795 2023 11 2.26053e+01 1.01700e+00 509 2023 12 2.04639e+01 1.22116e+00 434 2024 1 1.76978e+01 1.63989e+00 403 2024 2 1.73986e+01 6.61011e-01 476 2024 3 1.86604e+01 8.86682e-01 406 2024 4 2.01247e+01 5.09256e-01 48