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 6.15371e+01 2.88611e-01 436 2002 8 5.87162e+01 1.06392e+00 321 2002 9 5.28521e+01 1.82872e+00 358 2002 10 4.58920e+01 2.51748e+00 840 2002 11 3.86096e+01 1.87546e+00 515 2002 12 3.40156e+01 4.96085e-01 753 2003 1 3.55945e+01 1.08295e+00 640 2003 2 4.23538e+01 1.71166e+00 499 2003 3 5.12657e+01 2.20484e+00 692 2003 4 5.85971e+01 9.49040e-01 466 2003 5 6.14411e+01 6.14136e-01 416 2003 6 6.23834e+01 4.51677e-02 256 2003 7 6.16456e+01 5.79103e-01 230 2003 8 5.89188e+01 9.93793e-01 309 2003 9 5.33988e+01 8.42886e-01 310 2003 10 4.58204e+01 1.98911e+00 723 2003 11 3.69790e+01 1.20106e+00 329 2003 12 3.39190e+01 3.46772e-01 455 2004 1 3.64818e+01 1.46683e+00 695 2004 2 4.30006e+01 2.69713e+00 500 2004 3 5.20768e+01 2.37216e+00 734 2004 4 5.78458e+01 1.41118e+00 427 2004 5 6.15792e+01 6.54274e-01 353 2004 6 6.23619e+01 1.27881e-01 673 2004 7 6.15449e+01 4.37979e-01 448 2004 8 5.82273e+01 1.10489e+00 524 2004 9 5.22318e+01 1.79583e+00 327 2004 10 4.46962e+01 2.43701e+00 489 2004 11 3.82683e+01 1.75109e+00 285 2004 12 3.39572e+01 4.18731e-01 496 2005 1 3.70269e+01 1.42887e+00 775 2005 2 4.33253e+01 1.04264e+00 474 2005 3 5.17953e+01 2.37581e+00 512 2005 4 5.76332e+01 1.46246e+00 384 2005 5 6.15927e+01 4.80570e-01 576 2005 6 6.24051e+01 2.08040e-01 229 2005 7 6.15952e+01 5.29869e-01 389 2005 8 5.90028e+01 1.29794e+00 578 2005 9 5.41909e+01 1.50639e+00 682 2005 10 4.55429e+01 2.42624e+00 341 2005 11 3.80933e+01 1.99948e+00 700 2005 12 3.40733e+01 4.67202e-01 924 2006 1 3.56601e+01 1.46461e+00 701 2006 2 4.40761e+01 2.06125e+00 851 2006 3 5.12276e+01 2.48278e+00 824 2006 4 5.80575e+01 1.37664e+00 723 2006 5 6.12355e+01 5.80135e-01 576 2006 6 6.25534e+01 1.43338e-01 457 2006 7 6.11199e+01 4.08697e-01 134 2006 8 5.91238e+01 1.23555e+00 331 2006 9 5.25935e+01 1.80780e+00 536 2006 10 4.66686e+01 1.45624e+00 450 2006 11 3.75730e+01 1.31641e+00 556 2006 12 3.45287e+01 5.55176e-01 147 2007 1 3.66933e+01 1.76719e+00 710 2007 2 4.44054e+01 1.73780e+00 472 2007 3 4.99913e+01 2.06836e+00 379 2007 4 5.80539e+01 1.53707e+00 544 2007 5 6.09293e+01 4.46459e-01 347 2007 6 6.24455e+01 1.39841e-01 468 2007 7 6.14216e+01 4.36499e-01 412 2007 8 5.93052e+01 1.42579e+00 304 2007 9 5.29590e+01 2.07465e+00 344 2007 10 4.58752e+01 1.97045e+00 361 2007 11 3.83039e+01 1.86302e+00 917 2007 12 3.40589e+01 6.22120e-01 448 2008 1 3.64764e+01 1.79575e+00 450 2008 2 4.38654e+01 2.63914e+00 454 2008 3 5.08632e+01 2.02979e+00 430 2008 4 5.78738e+01 1.40077e+00 338 2008 5 6.14983e+01 5.07127e-01 480 2008 6 6.23725e+01 1.48660e-01 415 2008 7 6.06805e+01 3.08572e-01 252 2008 8 5.98702e+01 8.42945e-01 384 2008 9 5.26543e+01 1.83940e+00 340 2008 10 4.64792e+01 2.40500e+00 347 2008 11 3.71823e+01 1.47036e+00 669 2008 12 3.37605e+01 1.76634e-01 477 2009 1 3.69272e+01 1.84914e+00 750 2009 2 4.38502e+01 2.16600e+00 376 2009 3 5.00427e+01 2.26257e+00 573 2009 4 5.75271e+01 1.42701e+00 597 2009 5 6.12132e+01 5.04290e-01 494 2009 6 6.24937e+01 1.19004e-01 437 2009 7 6.15746e+01 6.68669e-01 320 2009 8 5.92945e+01 1.18008e+00 450 2009 9 5.21205e+01 1.28993e+00 192 2009 10 4.68936e+01 2.07318e+00 571 2009 11 3.74791e+01 1.60469e+00 569 2009 12 3.40375e+01 4.28879e-01 397 2010 1 3.61120e+01 1.75038e+00 585 2010 2 4.44048e+01 2.07470e+00 621 2010 3 5.19320e+01 2.60276e+00 501 2010 4 5.77508e+01 1.57788e+00 395 2010 5 6.11357e+01 5.06782e-01 505 2010 6 6.23329e+01 2.02384e-01 598 2010 7 6.10649e+01 5.41123e-01 290 2010 8 5.87338e+01 1.23664e+00 315 2010 9 5.49908e+01 4.33404e-01 200 2010 10 4.61752e+01 2.47743e+00 842 2010 11 3.89001e+01 1.64709e+00 657 2010 12 3.39477e+01 4.30373e-01 1126 2011 1 3.70917e+01 1.70708e+00 554 2011 2 4.36298e+01 2.43032e+00 953 2011 3 5.16859e+01 2.42309e+00 939 2011 4 5.85064e+01 1.07351e+00 590 2011 5 6.15891e+01 4.37216e-01 594 2011 6 6.25323e+01 1.16650e-01 479 2011 7 6.13713e+01 3.73167e-01 357 2011 8 5.95055e+01 1.07452e+00 255 2011 9 5.34386e+01 1.51089e+00 636 2011 10 4.67994e+01 1.22235e+00 305 2011 11 3.94050e+01 1.77205e+00 585 2011 12 3.40370e+01 5.80971e-01 768 2012 1 3.56972e+01 1.35262e+00 773 2012 2 4.50512e+01 9.66215e-01 275 2012 3 5.31403e+01 2.21199e+00 249 2012 4 5.72780e+01 1.08471e+00 531 2012 5 6.11715e+01 4.38666e-01 336 2012 6 6.24916e+01 8.53391e-02 266 2012 7 6.16188e+01 8.14113e-01 359 2012 8 5.91622e+01 1.06436e+00 399 2012 9 5.37442e+01 2.41288e+00 432 2012 10 4.49141e+01 2.59135e+00 485 2012 11 3.83594e+01 1.95443e+00 645 2012 12 3.40935e+01 5.93357e-01 377 2013 1 3.67301e+01 1.78411e+00 341 2013 2 4.27665e+01 2.36718e+00 761 2013 3 5.20038e+01 2.66671e+00 576 2013 4 5.78984e+01 1.43358e+00 232 2013 5 6.12371e+01 3.51212e-01 325 2013 6 6.23588e+01 5.26292e-02 56 2013 7 6.11440e+01 5.56518e-01 186 2013 8 5.91105e+01 1.08674e+00 121 2013 9 5.33065e+01 2.13520e+00 454 2013 10 4.57952e+01 2.24571e+00 677 2013 11 3.77381e+01 1.85764e+00 409 2013 12 3.42633e+01 5.92515e-01 395 2014 1 3.70854e+01 1.32432e+00 677 2014 2 4.30926e+01 2.07521e+00 700 2014 3 5.01176e+01 1.77227e+00 576 2014 4 5.87099e+01 1.33837e+00 492 2014 5 6.11010e+01 7.32915e-01 238 2014 6 6.23901e+01 7.93986e-02 512 2014 7 6.14124e+01 5.74552e-01 419 2014 8 5.95204e+01 9.36307e-01 490 2014 9 5.55256e+01 1.54617e+00 196 2014 10 4.53481e+01 2.87838e+00 619 2014 11 3.79378e+01 1.82533e+00 774 2014 12 3.39872e+01 3.44244e-01 415 2015 1 3.63684e+01 1.77400e+00 754 2015 2 4.39185e+01 2.04944e+00 706 2015 3 5.14475e+01 2.08697e+00 904 2015 4 5.71014e+01 7.73861e-01 225 2015 5 6.12021e+01 5.82429e-01 669 2015 6 6.23535e+01 6.80360e-02 429 2015 7 6.14151e+01 3.89946e-01 301 2015 8 5.94821e+01 7.98163e-01 577 2015 9 5.28078e+01 1.74051e+00 476 2015 10 4.69068e+01 5.11345e-01 256 2015 11 3.82716e+01 1.68533e+00 439 2015 12 3.38079e+01 8.30891e-01 411 2016 1 3.56369e+01 1.63543e+00 204 2016 2 4.38394e+01 2.48607e+00 667 2016 3 5.08894e+01 2.42599e+00 440 2016 4 5.76489e+01 1.26592e+00 579 2016 5 6.14341e+01 4.21276e-01 258 2016 6 6.21960e+01 1.58629e-01 351 2016 7 6.14628e+01 5.23565e-01 456 2016 8 5.93607e+01 1.07774e+00 338 2016 9 5.25903e+01 1.23632e+00 402 2016 10 4.61334e+01 1.72313e+00 325 2016 11 3.83273e+01 1.80276e+00 485 2016 12 3.38296e+01 4.23918e-01 508 2017 1 3.71758e+01 1.29547e+00 408 2017 2 4.34461e+01 2.27728e+00 1014 2017 3 5.21037e+01 2.08633e+00 640 2017 4 5.84454e+01 1.29718e+00 250 2017 5 6.12211e+01 6.42349e-01 558 2017 6 6.23442e+01 1.18892e-01 343 2017 7 6.15828e+01 5.37148e-01 333 2017 8 5.93136e+01 1.10719e+00 368 2017 9 5.33682e+01 1.84173e+00 546 2017 10 4.49569e+01 2.80267e+00 316 2017 11 3.85874e+01 1.93372e+00 685 2017 12 3.38801e+01 3.80046e-01 830 2018 1 3.60776e+01 1.66792e+00 704 2018 2 4.35101e+01 2.15962e+00 729 2018 3 5.16380e+01 2.37178e+00 871 2018 4 5.81926e+01 1.56112e+00 583 2018 5 6.03820e+01 1.58683e-02 64 2018 6 6.23471e+01 2.94736e-02 71 2018 7 6.15587e+01 4.69183e-01 570 2018 8 5.89413e+01 1.11411e+00 408 2018 9 5.23318e+01 1.15986e+00 518 2018 10 4.54030e+01 2.29230e+00 566 2018 11 3.82292e+01 1.62304e+00 339 2018 12 3.40520e+01 5.65882e-01 714 2019 1 3.62741e+01 1.45234e+00 628 2019 2 4.31995e+01 2.76525e+00 957 2019 3 5.08829e+01 2.19081e+00 703 2019 4 5.81497e+01 1.37196e+00 533 2019 5 6.12025e+01 6.45432e-01 429 2019 6 6.23658e+01 1.60133e-01 539 2019 7 6.11992e+01 4.70544e-01 567 2019 8 5.93511e+01 7.05250e-01 384 2019 9 5.41246e+01 1.86903e+00 448 2019 10 4.54625e+01 2.21245e+00 594 2019 11 3.81965e+01 1.90613e+00 816 2019 12 3.43908e+01 6.00458e-01 402 2020 1 3.59913e+01 1.58876e+00 998 2020 2 4.33299e+01 2.55526e+00 516 2020 3 5.25502e+01 1.76414e+00 670 2020 4 5.73945e+01 1.69657e+00 458 2020 5 6.13401e+01 6.99676e-01 515 2020 6 6.23229e+01 5.48360e-02 213 2020 7 6.16031e+01 5.12666e-01 401 2020 8 5.89005e+01 1.11329e+00 600 2020 9 5.26023e+01 2.28148e+00 327 2020 10 4.60541e+01 2.40421e+00 465 2020 11 3.65867e+01 1.02758e+00 320 2020 12 3.38169e+01 3.29831e-01 582 2021 1 3.64626e+01 1.69257e+00 628 2021 2 4.37836e+01 2.13272e+00 696 2021 3 5.20391e+01 2.71335e+00 903 2021 4 5.86228e+01 1.05692e+00 389 2021 5 6.04163e+01 1.60923e-01 196 2021 6 6.23046e+01 2.19136e-01 140 2021 7 6.13811e+01 5.67326e-01 594 2021 8 5.82187e+01 1.35443e+00 162 2021 9 5.31550e+01 2.37667e+00 512 2021 10 4.51876e+01 2.28482e+00 445 2021 11 3.76795e+01 2.09964e+00 642 2021 12 3.39939e+01 5.02306e-01 1047 2022 1 3.57018e+01 1.35121e+00 615 2022 2 4.34921e+01 2.43319e+00 644 2022 3 5.17874e+01 2.71780e+00 410 2022 4 5.89604e+01 7.32948e-01 136 2022 5 6.10983e+01 5.51613e-01 667 2022 6 6.24030e+01 1.30498e-01 313 2022 7 6.15813e+01 2.53869e-01 233 2022 8 5.89665e+01 1.13500e+00 626 2022 9 5.37870e+01 2.27700e+00 581 2022 10 4.56845e+01 2.92647e+00 575 2022 11 3.76990e+01 2.05029e+00 436 2022 12 3.38838e+01 4.50617e-01 534 2023 1 3.55266e+01 1.12308e+00 660 2023 2 4.39338e+01 2.57507e+00 808 2023 3 5.11482e+01 2.56159e+00 694 2023 4 5.78289e+01 1.52253e+00 316 2023 5 6.09503e+01 4.60269e-01 474 2023 6 6.24293e+01 1.27118e-01 502 2023 7 6.15571e+01 6.08846e-01 400 2023 8 5.94978e+01 9.27523e-01 367 2023 9 5.45102e+01 1.35516e+00 384 2023 10 4.53579e+01 2.67352e+00 574 2023 11 3.76562e+01 2.00889e+00 530 2023 12 3.39734e+01 5.38549e-01 263 2024 1 3.80095e+01 1.56049e+00 267 2024 2 4.32956e+01 2.16854e+00 569 2024 3 5.19136e+01 2.06071e+00 487 2024 4 nan nan 0