YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.81452e+01 3.64395e-01 32 2000 3 1.94606e+01 8.97846e-01 142 2000 4 2.14699e+01 4.67683e-01 97 2000 5 2.50228e+01 7.82706e-01 164 2000 6 2.75131e+01 1.27536e+00 158 2000 7 2.87624e+01 6.64858e-01 176 2000 8 2.92037e+01 1.18221e+00 64 2000 9 2.77706e+01 1.26184e+00 175 2000 10 2.42834e+01 9.24528e-01 235 2000 11 2.10494e+01 2.88439e+00 124 2000 12 1.66506e+01 9.94564e-01 145 2001 1 1.55739e+01 5.65687e-01 69 2001 2 1.56244e+01 1.11220e+00 32 2001 3 1.76450e+01 7.31477e-01 79 2001 4 2.06835e+01 1.94243e+00 140 2001 5 2.41241e+01 9.99253e-01 240 2001 6 2.47862e+01 7.98615e-01 32 2001 7 2.84756e+01 1.66199e+00 99 2001 8 2.82336e+01 7.17539e-01 128 2001 9 2.80316e+01 9.37714e-01 151 2001 10 2.39067e+01 1.50481e+00 212 2001 11 2.07535e+01 8.13632e-01 238 2001 12 1.95250e+01 1.75454e+00 162 2002 1 1.58061e+01 1.42655e+00 28 2002 2 1.74644e+01 4.75367e-01 32 2002 3 1.47246e+01 3.95590e-01 64 2002 4 2.15663e+01 1.41313e+00 96 2002 5 2.56522e+01 9.93704e-01 176 2002 6 2.72589e+01 7.41855e-01 120 2002 7 2.93900e+01 8.66794e-01 520 2002 8 2.94591e+01 9.32215e-01 604 2002 9 2.81637e+01 1.21913e+00 408 2002 10 2.66209e+01 1.90803e+00 455 2002 11 1.99789e+01 1.88717e+00 485 2002 12 1.68587e+01 1.29454e+00 431 2003 1 1.52049e+01 1.22499e+00 481 2003 2 1.54399e+01 9.80614e-01 331 2003 3 1.89069e+01 1.39010e+00 334 2003 4 2.07703e+01 1.83941e+00 566 2003 5 2.53417e+01 1.14863e+00 416 2003 6 2.70239e+01 1.80623e+00 463 2003 7 2.82593e+01 1.44586e+00 477 2003 8 2.84106e+01 1.42251e+00 522 2003 9 2.82421e+01 1.08920e+00 594 2003 10 2.42565e+01 1.08494e+00 620 2003 11 2.24494e+01 1.48232e+00 730 2003 12 1.71463e+01 1.03060e+00 371 2004 1 1.50198e+01 9.70518e-01 311 2004 2 1.49626e+01 1.53862e+00 227 2004 3 1.77603e+01 1.34720e+00 563 2004 4 2.05881e+01 1.49273e+00 506 2004 5 2.46729e+01 1.83827e+00 781 2004 6 2.73278e+01 1.63050e+00 481 2004 7 2.90575e+01 1.34757e+00 607 2004 8 2.85495e+01 1.28565e+00 497 2004 9 2.74232e+01 1.76070e+00 659 2004 10 2.55667e+01 1.13969e+00 653 2004 11 2.23539e+01 2.03853e+00 486 2004 12 1.82126e+01 1.35365e+00 370 2005 1 1.59113e+01 1.25504e+00 388 2005 2 1.60317e+01 9.16025e-01 286 2005 3 1.71274e+01 1.52788e+00 427 2005 4 2.04715e+01 1.35348e+00 602 2005 5 2.40795e+01 1.87699e+00 758 2005 6 2.76932e+01 1.36786e+00 791 2005 7 2.87006e+01 1.57681e+00 665 2005 8 2.91843e+01 1.28397e+00 583 2005 9 2.85881e+01 8.38654e-01 817 2005 10 2.57378e+01 1.71667e+00 956 2005 11 2.06024e+01 2.02928e+00 447 2005 12 1.65385e+01 1.05836e+00 329 2006 1 1.64836e+01 1.09889e+00 360 2006 2 1.58324e+01 1.04447e+00 427 2006 3 1.78846e+01 1.05032e+00 575 2006 4 2.11755e+01 1.55726e+00 596 2006 5 2.38773e+01 1.54618e+00 684 2006 6 2.83186e+01 1.28008e+00 805 2006 7 2.94548e+01 1.34559e+00 573 2006 8 3.00082e+01 1.11763e+00 656 2006 9 2.85926e+01 1.15773e+00 690 2006 10 2.54179e+01 1.91841e+00 678 2006 11 1.92949e+01 1.66486e+00 665 2006 12 1.68652e+01 1.37835e+00 333 2007 1 1.57316e+01 1.31726e+00 242 2007 2 1.46783e+01 1.22922e+00 311 2007 3 1.77836e+01 1.45365e+00 603 2007 4 2.03895e+01 1.62369e+00 635 2007 5 2.39261e+01 1.12404e+00 806 2007 6 2.71181e+01 1.37747e+00 615 2007 7 2.81390e+01 1.29413e+00 406 2007 8 2.99368e+01 1.27454e+00 699 2007 9 2.87095e+01 1.23756e+00 694 2007 10 2.56129e+01 2.08800e+00 601 2007 11 2.06937e+01 1.35170e+00 748 2007 12 1.87779e+01 1.35610e+00 382 2008 1 1.57136e+01 1.24419e+00 309 2008 2 1.67386e+01 1.33135e+00 440 2008 3 1.75747e+01 1.20938e+00 484 2008 4 2.09566e+01 1.40010e+00 572 2008 5 2.35270e+01 2.25822e+00 772 2008 6 2.85060e+01 1.51019e+00 585 2008 7 2.80570e+01 1.30467e+00 574 2008 8 2.74485e+01 1.42870e+00 436 2008 9 2.72730e+01 1.08193e+00 659 2008 10 2.42184e+01 1.82631e+00 790 2008 11 2.02739e+01 1.49949e+00 778 2008 12 1.70315e+01 1.29863e+00 299 2009 1 1.56723e+01 1.72290e+00 470 2009 2 1.55427e+01 1.19052e+00 445 2009 3 1.79775e+01 2.16540e+00 567 2009 4 2.11883e+01 1.66241e+00 635 2009 5 2.48651e+01 1.36194e+00 530 2009 6 2.67381e+01 1.63928e+00 719 2009 7 2.72345e+01 1.19419e+00 581 2009 8 2.80741e+01 1.15676e+00 570 2009 9 2.78661e+01 1.26671e+00 544 2009 10 2.57893e+01 2.05518e+00 472 2009 11 2.07269e+01 1.63018e+00 507 2009 12 1.64200e+01 2.06371e+00 209 2010 1 1.45670e+01 1.40266e+00 287 2010 2 1.40137e+01 1.60461e+00 340 2010 3 1.62249e+01 1.55315e+00 562 2010 4 2.05168e+01 1.21743e+00 609 2010 5 2.55945e+01 2.25667e+00 644 2010 6 2.98664e+01 1.79284e+00 804 2010 7 2.94432e+01 1.27848e+00 743 2010 8 2.94041e+01 1.46547e+00 443 2010 9 2.89660e+01 1.08446e+00 877 2010 10 2.49142e+01 9.59861e-01 1040 2010 11 2.10016e+01 9.48709e-01 576 2010 12 1.56954e+01 2.41790e+00 681 2011 1 1.39879e+01 1.17540e+00 468 2011 2 1.39708e+01 1.71622e+00 264 2011 3 1.87179e+01 1.81339e+00 595 2011 4 2.21822e+01 1.80399e+00 686 2011 5 2.45816e+01 1.78324e+00 891 2011 6 2.85998e+01 1.33047e+00 791 2011 7 2.94696e+01 1.45918e+00 665 2011 8 2.94162e+01 1.17941e+00 804 2011 9 2.74011e+01 8.30358e-01 721 2011 10 2.44680e+01 1.63942e+00 911 2011 11 2.01100e+01 8.32211e-01 549 2011 12 1.73280e+01 1.11374e+00 281 2012 1 1.62773e+01 1.15751e+00 399 2012 2 1.64582e+01 1.85604e+00 119 2012 3 2.02127e+01 2.18192e+00 494 2012 4 2.24975e+01 1.04884e+00 869 2012 5 2.62624e+01 1.55378e+00 907 2012 6 2.67158e+01 1.07068e+00 635 2012 7 2.82560e+01 1.28765e+00 434 2012 8 2.83432e+01 1.02263e+00 382 2012 9 2.73968e+01 1.05949e+00 699 2012 10 2.49814e+01 1.29056e+00 990 2012 11 2.00870e+01 1.62027e+00 746 2012 12 1.88039e+01 1.21943e+00 395 2013 1 1.71056e+01 9.74323e-01 352 2013 2 1.68642e+01 1.03778e+00 241 2013 3 1.71903e+01 1.36788e+00 557 2013 4 2.04387e+01 1.60027e+00 455 2013 5 2.36385e+01 2.17139e+00 605 2013 6 2.73887e+01 1.07206e+00 591 2013 7 2.83568e+01 8.87465e-01 432 2013 8 2.82135e+01 1.41485e+00 627 2013 9 2.91536e+01 1.06444e+00 710 2013 10 2.53971e+01 2.04050e+00 604 2013 11 2.14389e+01 2.44517e+00 404 2013 12 1.74012e+01 1.41539e+00 363 2014 1 1.44863e+01 5.72984e-01 296 2014 2 1.45647e+01 1.47376e+00 306 2014 3 1.65062e+01 1.43619e+00 362 2014 4 1.99772e+01 1.63347e+00 605 2014 5 2.46800e+01 1.49375e+00 634 2014 6 2.80985e+01 1.92559e+00 678 2014 7 2.72154e+01 1.25155e+00 737 2014 8 2.86346e+01 1.29002e+00 718 2014 9 2.90908e+01 1.52230e+00 581 2014 10 2.57218e+01 1.34093e+00 884 2014 11 1.92487e+01 2.37491e+00 509 2014 12 1.71597e+01 8.35117e-01 389 2015 1 1.62933e+01 8.22574e-01 247 2015 2 1.55893e+01 1.06907e+00 419 2015 3 1.95311e+01 1.34193e+00 290 2015 4 2.25437e+01 9.78113e-01 359 2015 5 2.55207e+01 1.80739e+00 730 2015 6 2.85230e+01 1.42983e+00 713 2015 7 2.81585e+01 1.46531e+00 640 2015 8 2.90708e+01 9.05180e-01 751 2015 9 2.85663e+01 1.24760e+00 628 2015 10 2.47220e+01 1.17172e+00 650 2015 11 2.21861e+01 1.85089e+00 472 2015 12 1.93810e+01 1.08111e+00 372 2016 1 1.61815e+01 1.48610e+00 352 2016 2 1.64748e+01 1.51258e+00 566 2016 3 1.87993e+01 1.05957e+00 361 2016 4 2.11891e+01 1.64331e+00 600 2016 5 2.48663e+01 1.54334e+00 583 2016 6 2.86075e+01 1.49273e+00 635 2016 7 2.94926e+01 1.42491e+00 665 2016 8 2.92477e+01 1.58974e+00 534 2016 9 2.93931e+01 9.35638e-01 714 2016 10 2.63653e+01 1.49012e+00 871 2016 11 2.21010e+01 1.75217e+00 531 2016 12 1.87724e+01 1.24422e+00 282 2017 1 1.73185e+01 1.38923e+00 353 2017 2 1.85505e+01 1.42516e+00 429 2017 3 1.89662e+01 2.07405e+00 656 2017 4 2.26207e+01 1.32109e+00 719 2017 5 2.43552e+01 1.41765e+00 589 2017 6 2.76585e+01 1.01623e+00 292 2017 7 2.93020e+01 1.47710e+00 710 2017 8 2.94474e+01 1.34570e+00 530 2017 9 2.77594e+01 1.28415e+00 599 2017 10 2.58712e+01 1.53921e+00 806 2017 11 2.13363e+01 1.68848e+00 651 2017 12 1.76756e+01 1.43525e+00 294 2018 1 1.54531e+01 1.09744e+00 304 2018 2 1.88359e+01 2.43527e+00 325 2018 3 1.96548e+01 1.50268e+00 533 2018 4 2.07623e+01 8.34865e-01 701 2018 5 2.57124e+01 2.10509e+00 789 2018 6 2.77453e+01 1.39223e+00 540 2018 7 2.86911e+01 1.27134e+00 483 2018 8 2.91600e+01 9.61630e-01 586 2018 9 2.93688e+01 1.36566e+00 715 2018 10 2.67747e+01 2.19224e+00 801 2018 11 2.13857e+01 2.26685e+00 260 2018 12 1.68313e+01 1.05610e+00 241 2019 1 1.65834e+01 1.48382e+00 372 2019 2 1.79635e+01 1.12438e+00 150 2019 3 1.82296e+01 1.21032e+00 491 2019 4 2.12059e+01 1.44511e+00 521 2019 5 2.63382e+01 2.16634e+00 839 2019 6 2.81147e+01 1.25963e+00 497 2019 7 2.92528e+01 1.08577e+00 590 2019 8 3.00358e+01 1.03655e+00 412 2019 9 2.97087e+01 1.00832e+00 831 2019 10 2.77033e+01 2.00247e+00 483 2019 11 2.03987e+01 2.13284e+00 507 2019 12 1.73793e+01 1.20290e+00 418 2020 1 1.65903e+01 1.52248e+00 405 2020 2 1.69847e+01 1.24168e+00 448 2020 3 2.09999e+01 2.67599e+00 493 2020 4 2.20399e+01 9.69766e-01 419 2020 5 2.40402e+01 1.71807e+00 719 2020 6 2.79872e+01 1.04704e+00 452 2020 7 2.85180e+01 1.52470e+00 507 2020 8 3.00060e+01 7.77048e-01 520 2020 9 2.82795e+01 2.00285e+00 576 2020 10 2.49407e+01 8.52968e-01 680 2020 11 2.22126e+01 1.34210e+00 818 2020 12 1.74905e+01 1.64067e+00 613 2021 1 1.57071e+01 1.18667e+00 571 2021 2 1.50050e+01 1.09602e+00 415 2021 3 1.81595e+01 1.26556e+00 472 2021 4 2.05125e+01 1.13586e+00 700 2021 5 2.40880e+01 1.22271e+00 603 2021 6 2.69690e+01 1.42904e+00 396 2021 7 2.94019e+01 1.13138e+00 422 2021 8 2.99607e+01 9.35043e-01 451 2021 9 2.79442e+01 1.38432e+00 611 2021 10 2.57718e+01 1.54433e+00 580 2021 11 2.00799e+01 1.33749e+00 884 2021 12 1.82452e+01 9.75960e-01 533 2022 1 1.56348e+01 2.02098e+00 567 2022 2 1.55242e+01 1.38587e+00 556 2022 3 1.83840e+01 1.08238e+00 680 2022 4 2.15686e+01 1.37303e+00 467 2022 5 2.54060e+01 9.77135e-01 723 2022 6 2.87123e+01 1.35152e+00 591 2022 7 2.99635e+01 1.13617e+00 504 2022 8 3.01024e+01 1.18613e+00 456 2022 9 2.88780e+01 1.48118e+00 727 2022 10 2.44248e+01 1.52319e+00 782 2022 11 2.13131e+01 1.73228e+00 524 2022 12 1.81281e+01 2.36268e+00 580 2023 1 1.72286e+01 1.15464e+00 594 2023 2 1.78614e+01 1.92971e+00 430 2023 3 1.99125e+01 1.49693e+00 458 2023 4 2.15534e+01 6.23455e-01 416 2023 5 2.48019e+01 1.95095e+00 674 2023 6 2.71540e+01 1.72339e+00 563 2023 7 2.88022e+01 1.51251e+00 744 2023 8 2.96536e+01 1.29246e+00 864 2023 9 2.97569e+01 9.06104e-01 630 2023 10 2.44602e+01 1.98925e+00 821 2023 11 2.04260e+01 1.39904e+00 559 2023 12 1.65638e+01 1.33315e+00 432 2024 1 1.43404e+01 9.91460e-01 400 2024 2 1.56526e+01 1.10323e+00 483 2024 3 1.82454e+01 8.79691e-01 420 2024 4 2.06176e+01 4.08767e-01 48