YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.03093e+01 7.86082e-02 21 2000 3 2.04627e+01 9.00854e-01 178 2000 4 2.12523e+01 6.65051e-01 112 2000 5 2.55087e+01 1.28304e+00 175 2000 6 2.73281e+01 9.99013e-01 137 2000 7 2.95998e+01 1.12255e+00 163 2000 8 2.88477e+01 1.63458e+00 79 2000 9 2.87454e+01 6.90933e-01 142 2000 10 2.57838e+01 1.01389e+00 256 2000 11 2.44833e+01 1.65982e+00 92 2000 12 2.19611e+01 1.24761e+00 127 2001 1 1.91736e+01 6.40770e-01 96 2001 2 1.93487e+01 5.90305e-01 64 2001 3 1.87466e+01 5.83935e-01 80 2001 4 2.11222e+01 2.06838e+00 143 2001 5 2.37313e+01 1.78308e+00 221 2001 6 2.63067e+01 1.75367e-01 72 2001 7 2.88470e+01 9.52830e-01 48 2001 8 2.84308e+01 4.55543e-01 96 2001 9 2.85931e+01 9.25317e-01 160 2001 10 2.58409e+01 1.02619e+00 272 2001 11 2.36028e+01 5.76411e-01 212 2001 12 2.28276e+01 8.34473e-01 222 2002 1 1.96503e+01 1.38396e+00 96 2002 2 1.87050e+01 1.27675e+00 115 2002 3 1.96080e+01 1.12267e+00 84 2002 4 2.20646e+01 1.73060e+00 101 2002 5 2.49740e+01 7.41020e-01 160 2002 6 2.68855e+01 6.82395e-01 153 2002 7 2.89650e+01 1.59467e+00 635 2002 8 2.90586e+01 8.68318e-01 647 2002 9 2.85649e+01 9.69357e-01 479 2002 10 2.75954e+01 1.47827e+00 525 2002 11 2.39389e+01 1.46395e+00 509 2002 12 2.06634e+01 1.76321e+00 502 2003 1 1.79909e+01 1.55509e+00 594 2003 2 1.72280e+01 1.04467e+00 353 2003 3 1.91926e+01 1.09374e+00 315 2003 4 2.06116e+01 1.39476e+00 567 2003 5 2.52248e+01 1.26290e+00 566 2003 6 2.72317e+01 1.58487e+00 465 2003 7 2.87743e+01 9.67708e-01 464 2003 8 2.85995e+01 1.22965e+00 623 2003 9 2.84179e+01 9.50147e-01 590 2003 10 2.59834e+01 8.09045e-01 630 2003 11 2.49084e+01 8.07974e-01 787 2003 12 2.13416e+01 1.89045e+00 443 2004 1 1.99094e+01 1.20528e+00 394 2004 2 1.80253e+01 1.01783e+00 215 2004 3 1.88279e+01 1.14205e+00 679 2004 4 1.99904e+01 1.41844e+00 463 2004 5 2.41587e+01 2.27188e+00 819 2004 6 2.77299e+01 1.31504e+00 549 2004 7 2.97320e+01 1.26878e+00 737 2004 8 2.90214e+01 1.80055e+00 522 2004 9 2.78051e+01 1.42514e+00 591 2004 10 2.51780e+01 1.44045e+00 696 2004 11 2.40285e+01 1.43125e+00 528 2004 12 2.18151e+01 1.15668e+00 520 2005 1 1.96803e+01 1.31846e+00 474 2005 2 1.90949e+01 9.63588e-01 338 2005 3 1.86501e+01 1.20415e+00 464 2005 4 2.03800e+01 1.16623e+00 627 2005 5 2.35447e+01 1.84260e+00 827 2005 6 2.69857e+01 1.58254e+00 758 2005 7 2.87466e+01 1.64297e+00 670 2005 8 2.93908e+01 1.44335e+00 604 2005 9 2.86728e+01 1.12048e+00 848 2005 10 2.70373e+01 1.14732e+00 944 2005 11 2.35006e+01 1.32072e+00 595 2005 12 2.07937e+01 1.10747e+00 563 2006 1 1.92686e+01 9.22435e-01 526 2006 2 1.84894e+01 1.16783e+00 435 2006 3 1.98766e+01 1.09595e+00 685 2006 4 2.16371e+01 1.88312e+00 680 2006 5 2.43176e+01 1.53168e+00 635 2006 6 2.81778e+01 1.41658e+00 812 2006 7 2.92234e+01 1.52027e+00 541 2006 8 3.01187e+01 1.06353e+00 744 2006 9 2.92482e+01 1.06947e+00 666 2006 10 2.74364e+01 1.21549e+00 644 2006 11 2.31488e+01 1.49407e+00 824 2006 12 2.00894e+01 1.27212e+00 375 2007 1 1.97685e+01 6.39436e-01 250 2007 2 1.86063e+01 6.38177e-01 423 2007 3 1.86738e+01 1.00367e+00 662 2007 4 2.11189e+01 1.54559e+00 608 2007 5 2.35052e+01 1.05504e+00 799 2007 6 2.70452e+01 1.79447e+00 677 2007 7 2.87736e+01 1.04637e+00 504 2007 8 2.95872e+01 1.31421e+00 719 2007 9 2.89910e+01 8.79795e-01 634 2007 10 2.70267e+01 1.17656e+00 651 2007 11 2.39916e+01 1.48523e+00 782 2007 12 2.14686e+01 8.95427e-01 508 2008 1 1.99446e+01 1.10156e+00 449 2008 2 1.96190e+01 7.58206e-01 439 2008 3 1.89191e+01 1.05883e+00 485 2008 4 2.06979e+01 8.86507e-01 528 2008 5 2.41078e+01 2.18021e+00 736 2008 6 2.90051e+01 1.33380e+00 670 2008 7 2.92638e+01 1.43291e+00 631 2008 8 2.78889e+01 1.15286e+00 544 2008 9 2.75875e+01 1.27483e+00 696 2008 10 2.62148e+01 1.01485e+00 858 2008 11 2.41252e+01 1.13804e+00 821 2008 12 2.06722e+01 1.24820e+00 489 2009 1 1.94143e+01 1.54351e+00 557 2009 2 1.86982e+01 1.27118e+00 477 2009 3 1.96382e+01 1.09961e+00 635 2009 4 2.05930e+01 1.09022e+00 611 2009 5 2.46713e+01 1.44776e+00 603 2009 6 2.77324e+01 1.76730e+00 893 2009 7 2.83051e+01 1.51851e+00 540 2009 8 2.88577e+01 1.37414e+00 564 2009 9 2.83714e+01 8.55624e-01 521 2009 10 2.69994e+01 1.42390e+00 538 2009 11 2.32483e+01 9.26746e-01 578 2009 12 2.02497e+01 9.57880e-01 217 2010 1 1.94062e+01 1.19215e+00 491 2010 2 1.59134e+01 1.49426e+00 449 2010 3 1.66296e+01 1.08330e+00 503 2010 4 2.01764e+01 1.35312e+00 552 2010 5 2.56655e+01 2.36102e+00 695 2010 6 3.01243e+01 1.73199e+00 751 2010 7 2.92731e+01 1.17960e+00 737 2010 8 2.98530e+01 1.33833e+00 491 2010 9 2.92208e+01 6.95627e-01 734 2010 10 2.58269e+01 1.18411e+00 1067 2010 11 2.33172e+01 1.31405e+00 652 2010 12 2.04951e+01 1.90532e+00 656 2011 1 1.83588e+01 1.00174e+00 514 2011 2 1.73914e+01 1.04341e+00 447 2011 3 1.94064e+01 8.81932e-01 549 2011 4 2.20525e+01 1.71484e+00 629 2011 5 2.44693e+01 1.50243e+00 1023 2011 6 2.91472e+01 1.31813e+00 927 2011 7 2.99962e+01 1.22108e+00 607 2011 8 3.07984e+01 1.23025e+00 759 2011 9 2.82701e+01 7.06187e-01 739 2011 10 2.62490e+01 1.14936e+00 888 2011 11 2.32929e+01 1.18778e+00 562 2011 12 2.14621e+01 7.78579e-01 398 2012 1 1.94637e+01 1.43445e+00 556 2012 2 1.76125e+01 1.82271e+00 188 2012 3 2.09804e+01 1.76923e+00 634 2012 4 2.25623e+01 7.59983e-01 836 2012 5 2.56693e+01 1.54124e+00 920 2012 6 2.70648e+01 7.27360e-01 586 2012 7 2.85343e+01 1.42666e+00 499 2012 8 2.92041e+01 9.55881e-01 450 2012 9 2.75975e+01 8.61928e-01 608 2012 10 2.63796e+01 7.36452e-01 950 2012 11 2.27732e+01 1.18472e+00 723 2012 12 2.19331e+01 1.52127e+00 477 2013 1 1.97334e+01 1.05246e+00 424 2013 2 1.98996e+01 6.91754e-01 368 2013 3 1.85564e+01 1.23621e+00 505 2013 4 2.04617e+01 1.15082e+00 399 2013 5 2.34123e+01 1.71360e+00 708 2013 6 2.77093e+01 1.70645e+00 708 2013 7 2.84592e+01 7.69040e-01 482 2013 8 2.89726e+01 1.58037e+00 525 2013 9 2.94117e+01 9.17813e-01 706 2013 10 2.70534e+01 1.17933e+00 624 2013 11 2.43611e+01 1.35207e+00 435 2013 12 2.19283e+01 1.33493e+00 404 2014 1 1.93592e+01 1.38797e+00 426 2014 2 1.76439e+01 7.97680e-01 362 2014 3 1.79097e+01 5.61757e-01 456 2014 4 1.97165e+01 1.36776e+00 448 2014 5 2.37021e+01 1.63042e+00 574 2014 6 2.82008e+01 1.61808e+00 699 2014 7 2.79805e+01 1.63813e+00 731 2014 8 2.95650e+01 1.14679e+00 699 2014 9 2.94560e+01 1.10687e+00 586 2014 10 2.68963e+01 9.68940e-01 984 2014 11 2.28179e+01 1.25981e+00 687 2014 12 2.16044e+01 9.45720e-01 476 2015 1 2.02635e+01 1.05948e+00 414 2015 2 1.95994e+01 1.16422e+00 512 2015 3 2.01057e+01 9.38694e-01 336 2015 4 2.17871e+01 1.42610e+00 348 2015 5 2.49638e+01 1.81464e+00 837 2015 6 2.85694e+01 1.18885e+00 694 2015 7 2.90623e+01 1.59216e+00 610 2015 8 2.98589e+01 8.69157e-01 757 2015 9 2.89928e+01 1.03350e+00 556 2015 10 2.60465e+01 1.07581e+00 659 2015 11 2.47665e+01 1.42498e+00 670 2015 12 2.29590e+01 8.71839e-01 377 2016 1 2.12855e+01 1.37554e+00 413 2016 2 1.81952e+01 1.53242e+00 596 2016 3 1.86402e+01 1.39456e+00 462 2016 4 2.07693e+01 1.43224e+00 503 2016 5 2.44752e+01 1.53092e+00 602 2016 6 2.88417e+01 1.23432e+00 693 2016 7 3.04810e+01 9.97839e-01 689 2016 8 2.97584e+01 1.15382e+00 528 2016 9 2.93558e+01 1.15405e+00 657 2016 10 2.73522e+01 1.25469e+00 862 2016 11 2.51145e+01 1.50850e+00 741 2016 12 2.26264e+01 1.40101e+00 551 2017 1 2.12750e+01 1.36539e+00 555 2017 2 1.94862e+01 1.24364e+00 530 2017 3 2.05412e+01 1.00549e+00 613 2017 4 2.20214e+01 9.92960e-01 716 2017 5 2.46258e+01 1.16343e+00 672 2017 6 2.68487e+01 1.15697e+00 356 2017 7 2.96100e+01 1.31712e+00 772 2017 8 2.98198e+01 1.53061e+00 600 2017 9 2.80546e+01 1.12419e+00 656 2017 10 2.68973e+01 8.78821e-01 862 2017 11 2.46408e+01 1.09014e+00 705 2017 12 2.19266e+01 1.37658e+00 462 2018 1 2.04093e+01 1.35765e+00 617 2018 2 2.07171e+01 1.45406e+00 475 2018 3 2.07591e+01 1.29077e+00 590 2018 4 2.12444e+01 7.22727e-01 681 2018 5 2.53522e+01 2.10641e+00 799 2018 6 2.89076e+01 1.39196e+00 654 2018 7 2.94385e+01 1.26220e+00 600 2018 8 2.90110e+01 1.24097e+00 560 2018 9 2.94359e+01 1.20920e+00 715 2018 10 2.78381e+01 1.43719e+00 827 2018 11 2.41234e+01 1.39809e+00 287 2018 12 2.03223e+01 2.25542e+00 314 2019 1 1.95881e+01 1.77890e+00 310 2019 2 1.89488e+01 2.18254e+00 149 2019 3 1.98331e+01 1.37787e+00 523 2019 4 2.03493e+01 1.02669e+00 424 2019 5 2.59326e+01 2.04021e+00 889 2019 6 2.86602e+01 1.17590e+00 588 2019 7 2.98802e+01 6.74444e-01 541 2019 8 3.00957e+01 1.04116e+00 527 2019 9 2.95504e+01 9.04934e-01 867 2019 10 2.80697e+01 1.19114e+00 550 2019 11 2.43038e+01 1.60630e+00 566 2019 12 2.22523e+01 1.28632e+00 400 2020 1 2.08151e+01 1.16288e+00 441 2020 2 2.04389e+01 8.38297e-01 403 2020 3 2.18792e+01 2.01029e+00 546 2020 4 2.23268e+01 8.93461e-01 404 2020 5 2.42924e+01 1.34598e+00 673 2020 6 2.74125e+01 9.75308e-01 548 2020 7 2.92720e+01 1.01302e+00 509 2020 8 3.03384e+01 7.73762e-01 464 2020 9 2.90558e+01 1.51279e+00 492 2020 10 2.56782e+01 8.57121e-01 658 2020 11 2.48652e+01 1.20937e+00 804 2020 12 2.21952e+01 1.46007e+00 649 2021 1 1.96037e+01 1.47996e+00 461 2021 2 1.87663e+01 1.10752e+00 444 2021 3 2.00963e+01 8.34804e-01 467 2021 4 2.14008e+01 6.25284e-01 639 2021 5 2.38537e+01 1.13234e+00 628 2021 6 2.65212e+01 1.44123e+00 419 2021 7 2.94831e+01 1.12524e+00 483 2021 8 3.02672e+01 1.08221e+00 598 2021 9 2.81276e+01 8.63967e-01 511 2021 10 2.68203e+01 8.47538e-01 487 2021 11 2.38371e+01 1.08986e+00 815 2021 12 2.18399e+01 7.97145e-01 592 2022 1 2.04969e+01 1.28779e+00 475 2022 2 1.93180e+01 1.03313e+00 584 2022 3 1.94908e+01 7.99642e-01 698 2022 4 2.17119e+01 9.03789e-01 472 2022 5 2.55394e+01 5.82128e-01 737 2022 6 2.87979e+01 1.65205e+00 724 2022 7 3.00878e+01 8.35902e-01 606 2022 8 3.03213e+01 1.01353e+00 490 2022 9 2.94548e+01 9.30983e-01 692 2022 10 2.62318e+01 1.26468e+00 770 2022 11 2.38958e+01 1.26544e+00 450 2022 12 2.27454e+01 1.02156e+00 594 2023 1 2.18333e+01 9.71484e-01 536 2023 2 2.07908e+01 1.10179e+00 503 2023 3 2.12259e+01 9.65856e-01 557 2023 4 2.15858e+01 7.38715e-01 442 2023 5 2.41155e+01 1.60553e+00 721 2023 6 2.71934e+01 2.05597e+00 579 2023 7 3.00134e+01 1.16759e+00 668 2023 8 3.10973e+01 9.63096e-01 812 2023 9 3.02924e+01 1.00840e+00 714 2023 10 2.63689e+01 1.63984e+00 802 2023 11 2.41714e+01 1.15320e+00 573 2023 12 2.16766e+01 8.96219e-01 352 2024 1 1.99727e+01 1.06271e+00 368 2024 2 1.91693e+01 7.08305e-01 465 2024 3 1.98310e+01 1.04359e+00 367 2024 4 2.05864e+01 2.26343e-01 48