YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.94156e+01 4.02287e-02 16 2000 3 1.93587e+01 9.29049e-01 153 2000 4 2.14594e+01 5.15164e-01 112 2000 5 2.40767e+01 2.32847e+00 192 2000 6 2.67022e+01 1.19223e+00 131 2000 7 2.93180e+01 6.10369e-01 128 2000 8 2.98240e+01 4.80279e-01 64 2000 9 2.81239e+01 6.71747e-01 96 2000 10 2.48365e+01 1.20624e+00 256 2000 11 2.26781e+01 1.59110e+00 160 2000 12 1.91214e+01 1.64300e+00 148 2001 1 1.66843e+01 1.20277e+00 64 2001 2 1.84923e+01 1.00046e+00 62 2001 3 1.87469e+01 1.27851e+00 112 2001 4 2.02404e+01 1.62597e+00 152 2001 5 2.34408e+01 1.55384e+00 243 2001 6 2.61856e+01 6.56346e-01 48 2001 7 2.76278e+01 1.20613e+00 73 2001 8 2.83529e+01 1.86510e+00 155 2001 9 2.82467e+01 1.45844e+00 144 2001 10 2.43153e+01 1.36100e+00 176 2001 11 2.15604e+01 5.58557e-01 272 2001 12 2.16144e+01 9.06478e-01 186 2002 1 1.73737e+01 9.87792e-01 67 2002 2 1.71698e+01 1.44578e+00 129 2002 3 1.74200e+01 9.34403e-01 18 2002 4 2.21314e+01 1.91022e+00 191 2002 5 2.53422e+01 9.60721e-01 224 2002 6 2.67108e+01 7.24446e-01 162 2002 7 2.87683e+01 1.58462e+00 493 2002 8 2.88170e+01 1.13531e+00 541 2002 9 2.87885e+01 8.61425e-01 440 2002 10 2.78056e+01 1.51546e+00 553 2002 11 2.32271e+01 2.33762e+00 470 2002 12 1.76783e+01 1.33954e+00 360 2003 1 1.63349e+01 9.84875e-01 583 2003 2 1.64558e+01 9.77969e-01 329 2003 3 1.89958e+01 1.65503e+00 221 2003 4 1.99704e+01 1.26774e+00 572 2003 5 2.52295e+01 1.24131e+00 742 2003 6 2.77638e+01 1.21742e+00 515 2003 7 2.89160e+01 1.13188e+00 481 2003 8 2.85306e+01 1.15335e+00 530 2003 9 2.85813e+01 7.40461e-01 533 2003 10 2.49256e+01 9.15898e-01 599 2003 11 2.29014e+01 1.16857e+00 786 2003 12 1.84159e+01 1.35536e+00 391 2004 1 1.70253e+01 1.16853e+00 457 2004 2 1.58524e+01 8.61307e-01 253 2004 3 1.82711e+01 1.44014e+00 655 2004 4 1.99249e+01 1.26955e+00 545 2004 5 2.44349e+01 1.90388e+00 969 2004 6 2.84351e+01 1.26097e+00 652 2004 7 2.91146e+01 1.35469e+00 664 2004 8 2.93685e+01 9.50409e-01 578 2004 9 2.74460e+01 1.65038e+00 511 2004 10 2.53269e+01 1.00409e+00 620 2004 11 2.34552e+01 1.60298e+00 549 2004 12 1.81074e+01 1.82744e+00 522 2005 1 1.66493e+01 1.27091e+00 380 2005 2 1.67188e+01 9.57266e-01 349 2005 3 1.68992e+01 1.24220e+00 472 2005 4 1.98768e+01 1.30331e+00 591 2005 5 2.38934e+01 1.90868e+00 805 2005 6 2.69363e+01 1.47684e+00 692 2005 7 2.88706e+01 1.42881e+00 668 2005 8 2.93831e+01 1.29343e+00 656 2005 9 2.83880e+01 1.06858e+00 638 2005 10 2.63940e+01 1.28784e+00 794 2005 11 2.25623e+01 1.34212e+00 620 2005 12 1.75997e+01 1.82034e+00 467 2006 1 1.78997e+01 1.18123e+00 382 2006 2 1.70395e+01 1.44874e+00 421 2006 3 1.85762e+01 9.70361e-01 732 2006 4 2.19085e+01 1.72348e+00 725 2006 5 2.41068e+01 1.28235e+00 873 2006 6 2.76603e+01 1.77149e+00 931 2006 7 2.93842e+01 1.25031e+00 596 2006 8 3.00844e+01 8.10227e-01 626 2006 9 2.92665e+01 1.08916e+00 695 2006 10 2.65218e+01 1.61007e+00 683 2006 11 2.10267e+01 1.66545e+00 611 2006 12 1.86424e+01 1.44251e+00 337 2007 1 1.82588e+01 9.95393e-01 251 2007 2 1.56701e+01 8.34418e-01 380 2007 3 1.79308e+01 1.11846e+00 657 2007 4 2.02077e+01 1.23056e+00 523 2007 5 2.29907e+01 8.34396e-01 870 2007 6 2.68066e+01 1.70634e+00 725 2007 7 2.89181e+01 1.37443e+00 434 2007 8 2.96106e+01 1.33846e+00 707 2007 9 2.91076e+01 9.23773e-01 581 2007 10 2.70904e+01 8.88495e-01 528 2007 11 2.21784e+01 1.31212e+00 871 2007 12 2.11727e+01 9.98760e-01 507 2008 1 1.81151e+01 1.68437e+00 447 2008 2 1.80198e+01 1.12413e+00 434 2008 3 1.83799e+01 1.12126e+00 560 2008 4 2.06726e+01 1.54384e+00 660 2008 5 2.38008e+01 1.61149e+00 746 2008 6 2.83283e+01 1.28915e+00 714 2008 7 2.89136e+01 1.42444e+00 510 2008 8 2.76602e+01 1.33719e+00 402 2008 9 2.76356e+01 1.30743e+00 628 2008 10 2.53684e+01 1.18996e+00 873 2008 11 2.08014e+01 1.19853e+00 637 2008 12 1.92063e+01 1.09289e+00 407 2009 1 1.79707e+01 1.57625e+00 554 2009 2 1.63979e+01 9.87263e-01 639 2009 3 1.84104e+01 1.75116e+00 579 2009 4 2.04779e+01 1.25905e+00 513 2009 5 2.44927e+01 1.48257e+00 671 2009 6 2.70581e+01 1.17664e+00 709 2009 7 2.78771e+01 1.21821e+00 568 2009 8 2.85836e+01 1.31683e+00 473 2009 9 2.79991e+01 1.08109e+00 542 2009 10 2.62602e+01 1.91278e+00 629 2009 11 2.18010e+01 1.78529e+00 480 2009 12 1.70879e+01 1.23472e+00 183 2010 1 1.56060e+01 1.33061e+00 413 2010 2 1.50975e+01 1.19475e+00 388 2010 3 1.66013e+01 9.00855e-01 505 2010 4 1.98337e+01 1.23953e+00 588 2010 5 2.52955e+01 2.38343e+00 769 2010 6 2.97643e+01 1.12525e+00 793 2010 7 2.89046e+01 1.16288e+00 537 2010 8 2.93150e+01 1.08591e+00 438 2010 9 2.89869e+01 9.25955e-01 794 2010 10 2.53550e+01 1.12639e+00 969 2010 11 2.22035e+01 8.85324e-01 764 2010 12 1.78946e+01 1.83208e+00 742 2011 1 1.48729e+01 1.27928e+00 520 2011 2 1.50309e+01 1.32609e+00 209 2011 3 1.84484e+01 1.18569e+00 558 2011 4 2.18040e+01 1.24482e+00 725 2011 5 2.46043e+01 1.31865e+00 952 2011 6 2.85293e+01 1.01440e+00 785 2011 7 2.97335e+01 1.30418e+00 519 2011 8 2.99490e+01 1.03372e+00 823 2011 9 2.83256e+01 8.00127e-01 649 2011 10 2.54225e+01 1.44735e+00 678 2011 11 2.17819e+01 9.25526e-01 559 2011 12 1.82887e+01 9.16791e-01 536 2012 1 1.78507e+01 1.47927e+00 556 2012 2 1.84595e+01 7.88400e-01 110 2012 3 2.02544e+01 1.37172e+00 692 2012 4 2.26595e+01 8.43253e-01 882 2012 5 2.56131e+01 1.46523e+00 812 2012 6 2.68580e+01 8.15298e-01 468 2012 7 2.81046e+01 1.17607e+00 622 2012 8 2.83477e+01 1.82535e+00 490 2012 9 2.80110e+01 9.31966e-01 616 2012 10 2.59757e+01 1.36238e+00 793 2012 11 2.12544e+01 1.15954e+00 517 2012 12 2.10995e+01 1.70667e+00 465 2013 1 1.91411e+01 1.23737e+00 430 2013 2 1.88014e+01 1.50445e+00 335 2013 3 1.72816e+01 7.56727e-01 534 2013 4 1.99373e+01 1.18220e+00 361 2013 5 2.32586e+01 1.96156e+00 719 2013 6 2.74427e+01 1.54873e+00 600 2013 7 2.77105e+01 1.11476e+00 288 2013 8 2.92384e+01 1.38932e+00 506 2013 9 2.96092e+01 8.69162e-01 666 2013 10 2.66796e+01 1.16978e+00 599 2013 11 2.18160e+01 2.32469e+00 348 2013 12 1.92222e+01 1.26834e+00 448 2014 1 1.60496e+01 9.68090e-01 343 2014 2 1.58175e+01 9.82661e-01 339 2014 3 1.72195e+01 9.41659e-01 486 2014 4 2.04936e+01 1.65196e+00 386 2014 5 2.37659e+01 1.56244e+00 610 2014 6 2.78125e+01 1.44773e+00 672 2014 7 2.85842e+01 1.17646e+00 654 2014 8 2.97882e+01 7.57913e-01 775 2014 9 2.93484e+01 9.98294e-01 581 2014 10 2.65485e+01 1.15636e+00 974 2014 11 2.10253e+01 2.09617e+00 633 2014 12 1.90630e+01 1.08307e+00 425 2015 1 1.69007e+01 1.14051e+00 343 2015 2 1.67277e+01 8.72872e-01 502 2015 3 1.89373e+01 1.28360e+00 380 2015 4 2.14890e+01 1.22017e+00 294 2015 5 2.53091e+01 1.98895e+00 902 2015 6 2.88070e+01 1.22134e+00 681 2015 7 2.87889e+01 1.10888e+00 586 2015 8 2.96047e+01 1.06308e+00 645 2015 9 2.85870e+01 7.38045e-01 388 2015 10 2.58979e+01 1.00035e+00 752 2015 11 2.38183e+01 1.61587e+00 563 2015 12 2.03154e+01 1.27548e+00 421 2016 1 1.84731e+01 1.87421e+00 328 2016 2 1.70905e+01 1.06752e+00 588 2016 3 1.83824e+01 1.61033e+00 378 2016 4 2.11135e+01 1.16765e+00 588 2016 5 2.40305e+01 1.64402e+00 620 2016 6 2.78448e+01 1.58043e+00 627 2016 7 3.05455e+01 1.16944e+00 694 2016 8 2.94682e+01 1.22679e+00 522 2016 9 2.90387e+01 1.18617e+00 739 2016 10 2.63115e+01 1.28431e+00 730 2016 11 2.31701e+01 1.46417e+00 526 2016 12 1.92169e+01 1.08952e+00 478 2017 1 1.86195e+01 1.38864e+00 477 2017 2 1.90878e+01 5.53148e-01 562 2017 3 1.91054e+01 1.50753e+00 679 2017 4 2.19506e+01 1.07635e+00 658 2017 5 2.44540e+01 1.16795e+00 652 2017 6 2.71870e+01 1.35007e+00 322 2017 7 2.98058e+01 1.05122e+00 667 2017 8 2.96606e+01 1.20631e+00 561 2017 9 2.80994e+01 1.18295e+00 679 2017 10 2.64545e+01 1.14010e+00 812 2017 11 2.26237e+01 1.24461e+00 716 2017 12 1.91266e+01 1.27514e+00 337 2018 1 1.61470e+01 1.74329e+00 390 2018 2 1.96807e+01 2.38580e+00 316 2018 3 1.98791e+01 1.50061e+00 696 2018 4 2.07944e+01 9.02533e-01 628 2018 5 2.46228e+01 1.83037e+00 809 2018 6 2.82514e+01 1.50640e+00 436 2018 7 2.92081e+01 1.09161e+00 533 2018 8 2.90833e+01 1.00382e+00 483 2018 9 2.97822e+01 8.49415e-01 683 2018 10 2.75538e+01 1.46949e+00 730 2018 11 2.19829e+01 2.32355e+00 334 2018 12 1.94540e+01 1.17672e+00 306 2019 1 1.73978e+01 1.43009e+00 461 2019 2 1.76054e+01 1.54135e+00 223 2019 3 1.88618e+01 1.14651e+00 580 2019 4 2.12475e+01 1.36345e+00 482 2019 5 2.63484e+01 1.91698e+00 815 2019 6 2.85818e+01 1.33578e+00 447 2019 7 2.95591e+01 1.35021e+00 480 2019 8 2.98760e+01 8.21185e-01 463 2019 9 2.93261e+01 7.78541e-01 830 2019 10 2.78879e+01 1.12361e+00 499 2019 11 2.29394e+01 1.92783e+00 607 2019 12 1.98529e+01 1.48221e+00 301 2020 1 1.91680e+01 1.25024e+00 555 2020 2 1.82024e+01 8.02272e-01 435 2020 3 2.13334e+01 2.27312e+00 601 2020 4 2.23250e+01 8.92162e-01 399 2020 5 2.38159e+01 1.46536e+00 685 2020 6 2.84994e+01 1.12750e+00 514 2020 7 2.87112e+01 1.03374e+00 459 2020 8 3.02846e+01 5.98616e-01 429 2020 9 2.89839e+01 1.38300e+00 400 2020 10 2.57913e+01 1.27249e+00 533 2020 11 2.34448e+01 1.33502e+00 722 2020 12 1.87431e+01 1.37848e+00 692 2021 1 1.64760e+01 1.31730e+00 362 2021 2 1.74227e+01 8.77368e-01 329 2021 3 1.87642e+01 1.12525e+00 516 2021 4 2.08608e+01 8.74306e-01 605 2021 5 2.40224e+01 1.23745e+00 706 2021 6 2.68291e+01 1.51592e+00 377 2021 7 2.91312e+01 1.00285e+00 464 2021 8 2.96040e+01 1.12339e+00 499 2021 9 2.81465e+01 9.21923e-01 503 2021 10 2.70224e+01 8.93549e-01 383 2021 11 2.20639e+01 1.55543e+00 771 2021 12 1.96795e+01 1.14506e+00 556 2022 1 1.83374e+01 2.12846e+00 513 2022 2 1.70286e+01 1.34560e+00 551 2022 3 1.94068e+01 9.46527e-01 740 2022 4 2.15115e+01 7.57699e-01 425 2022 5 2.51361e+01 1.39781e+00 753 2022 6 2.90609e+01 1.46047e+00 695 2022 7 3.01513e+01 1.07731e+00 536 2022 8 3.04209e+01 8.39189e-01 463 2022 9 2.92017e+01 1.20752e+00 510 2022 10 2.57169e+01 1.51128e+00 736 2022 11 2.35447e+01 9.52243e-01 435 2022 12 2.09435e+01 1.81203e+00 567 2023 1 1.97694e+01 1.31486e+00 611 2023 2 1.87885e+01 1.31613e+00 574 2023 3 2.13410e+01 8.05201e-01 732 2023 4 2.19115e+01 5.97021e-01 472 2023 5 2.49390e+01 1.74990e+00 710 2023 6 2.68031e+01 1.65448e+00 629 2023 7 2.97838e+01 1.30508e+00 607 2023 8 3.07444e+01 9.28205e-01 664 2023 9 3.05560e+01 8.41322e-01 612 2023 10 2.56737e+01 1.36796e+00 681 2023 11 2.25548e+01 1.41707e+00 500 2023 12 1.80750e+01 1.43024e+00 332 2024 1 1.69552e+01 9.48723e-01 307 2024 2 1.71980e+01 8.17370e-01 520 2024 3 1.94575e+01 1.42187e+00 332 2024 4 2.06134e+01 1.25955e-01 32