YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.90209e+01 4.71094e-01 23 2000 3 1.99180e+01 9.37203e-01 57 2000 4 2.16752e+01 1.39391e+00 50 2000 5 2.65485e+01 1.21016e+00 100 2000 6 2.80431e+01 1.17648e+00 63 2000 7 3.06741e+01 9.18500e-01 120 2000 8 2.97367e+01 1.58983e+00 44 2000 9 2.72340e+01 1.75558e+00 126 2000 10 2.29939e+01 1.27191e+00 95 2000 11 2.29346e+01 1.26012e+00 26 2000 12 1.59812e+01 5.11184e-01 30 2001 1 1.27717e+01 2.35699e-02 3 2001 2 1.60504e+01 1.69618e+00 47 2001 3 1.77075e+01 1.98934e+00 75 2001 4 2.21273e+01 3.56874e+00 79 2001 5 2.47443e+01 1.74425e+00 112 2001 6 2.80656e+01 7.77791e-02 16 2001 7 2.89733e+01 1.90624e+00 104 2001 8 2.81201e+01 1.25231e+00 113 2001 9 2.75571e+01 1.64556e+00 108 2001 10 2.16832e+01 1.72958e+00 117 2001 11 1.96808e+01 1.51737e+00 97 2001 12 1.89622e+01 9.51265e-01 107 2002 1 1.59585e+01 1.67049e-01 13 2002 2 1.56128e+01 1.18080e+00 29 2002 3 1.24256e+01 2.40695e-01 8 2002 4 2.32713e+01 2.31887e+00 70 2002 5 2.57861e+01 2.57640e+00 99 2002 6 2.80920e+01 1.21020e+00 87 2002 7 2.98283e+01 1.45583e+00 409 2002 8 2.91624e+01 1.73747e+00 471 2002 9 2.76880e+01 1.52010e+00 359 2002 10 2.63197e+01 2.73167e+00 402 2002 11 1.98075e+01 1.94446e+00 190 2002 12 1.55524e+01 1.04401e+00 116 2003 1 1.30556e+01 1.10555e+00 101 2003 2 1.45162e+01 1.36849e+00 191 2003 3 2.05904e+01 1.75517e+00 285 2003 4 2.07379e+01 2.70022e+00 434 2003 5 2.55618e+01 1.39434e+00 402 2003 6 2.78647e+01 1.45365e+00 374 2003 7 2.88490e+01 1.74456e+00 340 2003 8 2.84651e+01 1.68447e+00 373 2003 9 2.77236e+01 1.58653e+00 340 2003 10 2.28305e+01 1.23690e+00 347 2003 11 2.17686e+01 1.82413e+00 427 2003 12 1.58877e+01 1.03287e+00 53 2004 1 1.47184e+01 1.16564e+00 64 2004 2 1.37426e+01 7.81333e-01 39 2004 3 1.84288e+01 1.80211e+00 396 2004 4 2.04094e+01 2.57736e+00 319 2004 5 2.59514e+01 2.72283e+00 657 2004 6 2.81961e+01 1.64954e+00 347 2004 7 2.97467e+01 1.49936e+00 558 2004 8 2.80802e+01 1.63883e+00 413 2004 9 2.71085e+01 2.10856e+00 572 2004 10 2.49278e+01 2.21400e+00 453 2004 11 2.08746e+01 2.53350e+00 262 2004 12 1.73078e+01 1.25001e+00 122 2005 1 1.56443e+01 2.05024e+00 140 2005 2 1.60177e+01 1.51470e+00 125 2005 3 1.60799e+01 1.91492e+00 196 2005 4 2.00329e+01 2.38721e+00 337 2005 5 2.46468e+01 2.77989e+00 466 2005 6 2.80422e+01 1.59986e+00 539 2005 7 2.92429e+01 1.82602e+00 524 2005 8 2.93514e+01 1.82045e+00 399 2005 9 2.80254e+01 1.78125e+00 628 2005 10 2.48847e+01 1.75900e+00 459 2005 11 1.98430e+01 1.97183e+00 135 2005 12 1.66150e+01 1.88271e+00 41 2006 1 1.55153e+01 1.44704e+00 156 2006 2 1.48298e+01 1.30427e+00 125 2006 3 1.81062e+01 1.77643e+00 357 2006 4 2.32919e+01 2.42131e+00 373 2006 5 2.53700e+01 2.53935e+00 514 2006 6 2.86428e+01 1.59876e+00 511 2006 7 2.98877e+01 1.64639e+00 406 2006 8 2.97620e+01 1.32218e+00 561 2006 9 2.76258e+01 1.95084e+00 467 2006 10 2.47606e+01 2.24996e+00 383 2006 11 1.89090e+01 1.53553e+00 204 2006 12 1.55518e+01 7.83071e-01 28 2007 1 1.45362e+01 8.44333e-01 44 2007 2 1.45961e+01 1.19632e+00 99 2007 3 1.80357e+01 2.52788e+00 339 2007 4 2.06768e+01 1.93804e+00 281 2007 5 2.45259e+01 1.35214e+00 462 2007 6 2.83440e+01 1.82464e+00 469 2007 7 2.91011e+01 1.75501e+00 331 2007 8 3.07957e+01 1.33528e+00 558 2007 9 2.80641e+01 1.74257e+00 498 2007 10 2.55079e+01 1.88763e+00 370 2007 11 1.91341e+01 1.56685e+00 281 2007 12 1.88638e+01 1.60758e+00 169 2008 1 1.55550e+01 9.83522e-01 64 2008 2 1.69883e+01 1.80837e+00 201 2008 3 1.71980e+01 1.87743e+00 259 2008 4 2.13281e+01 2.30360e+00 326 2008 5 2.49016e+01 2.43455e+00 535 2008 6 2.94013e+01 1.38686e+00 515 2008 7 2.91571e+01 1.78583e+00 522 2008 8 2.83246e+01 1.74593e+00 432 2008 9 2.70193e+01 2.02995e+00 443 2008 10 2.33871e+01 1.69153e+00 321 2008 11 1.88139e+01 1.72663e+00 221 2008 12 1.58159e+01 1.36528e+00 113 2009 1 1.55056e+01 2.33553e+00 117 2009 2 1.42748e+01 1.55265e+00 175 2009 3 1.89157e+01 2.12476e+00 319 2009 4 2.11830e+01 2.19819e+00 424 2009 5 2.54539e+01 1.85425e+00 459 2009 6 2.89737e+01 2.27502e+00 616 2009 7 2.92749e+01 1.58032e+00 539 2009 8 2.80280e+01 1.76913e+00 378 2009 9 2.82424e+01 1.64465e+00 468 2009 10 2.52516e+01 2.47788e+00 338 2009 11 1.90791e+01 1.59893e+00 153 2009 12 1.35951e+01 7.75948e-01 72 2010 1 1.37918e+01 1.32769e+00 97 2010 2 1.17567e+01 1.11119e+00 147 2010 3 1.54808e+01 2.28818e+00 253 2010 4 2.12039e+01 2.01929e+00 353 2010 5 2.67908e+01 2.62370e+00 446 2010 6 3.08303e+01 2.01236e+00 637 2010 7 2.97140e+01 1.92483e+00 709 2010 8 2.98480e+01 1.90290e+00 347 2010 9 2.88467e+01 1.94370e+00 677 2010 10 2.34776e+01 1.48099e+00 556 2010 11 1.97691e+01 1.89349e+00 342 2010 12 1.45965e+01 2.03302e+00 101 2011 1 1.17598e+01 1.25073e+00 120 2011 2 1.73517e+01 2.41378e+00 139 2011 3 1.92886e+01 2.89249e+00 392 2011 4 2.27731e+01 1.96491e+00 389 2011 5 2.52724e+01 2.50610e+00 573 2011 6 2.99023e+01 1.51401e+00 567 2011 7 3.00551e+01 1.56226e+00 557 2011 8 3.02352e+01 1.58372e+00 643 2011 9 2.69900e+01 1.59499e+00 567 2011 10 2.25323e+01 1.72969e+00 390 2011 11 1.84895e+01 1.43664e+00 249 2011 12 1.57404e+01 5.82406e-01 52 2012 1 1.66206e+01 2.23887e+00 253 2012 2 1.58729e+01 1.32135e+00 96 2012 3 2.06753e+01 2.65773e+00 404 2012 4 2.26097e+01 1.67690e+00 477 2012 5 2.70272e+01 1.67565e+00 588 2012 6 2.71654e+01 1.70191e+00 457 2012 7 2.90986e+01 1.65297e+00 409 2012 8 2.90785e+01 1.30041e+00 346 2012 9 2.70637e+01 1.59238e+00 622 2012 10 2.43136e+01 1.53257e+00 484 2012 11 1.88760e+01 1.50395e+00 199 2012 12 1.74373e+01 1.80215e+00 230 2013 1 1.55295e+01 1.78050e+00 203 2013 2 1.54002e+01 1.09772e+00 156 2013 3 1.56180e+01 1.94340e+00 281 2013 4 2.04937e+01 2.15889e+00 313 2013 5 2.34082e+01 2.81111e+00 390 2013 6 2.79611e+01 1.57184e+00 461 2013 7 2.86556e+01 1.33040e+00 283 2013 8 2.85323e+01 1.56997e+00 506 2013 9 2.88791e+01 1.61832e+00 561 2013 10 2.48438e+01 2.22814e+00 365 2013 11 1.97359e+01 1.95024e+00 107 2013 12 1.80454e+01 1.64927e+00 85 2014 1 1.23839e+01 6.91083e-01 97 2014 2 1.35378e+01 1.76391e+00 125 2014 3 1.63556e+01 1.48056e+00 205 2014 4 1.99843e+01 2.46889e+00 400 2014 5 2.50061e+01 2.35381e+00 432 2014 6 2.87803e+01 1.91285e+00 577 2014 7 2.86642e+01 1.59301e+00 615 2014 8 2.98960e+01 1.75530e+00 573 2014 9 2.82154e+01 2.03821e+00 437 2014 10 2.43907e+01 1.88226e+00 581 2014 11 1.59872e+01 2.03472e+00 69 2014 12 1.63077e+01 9.99759e-01 154 2015 1 1.46017e+01 7.50294e-01 23 2015 2 1.33266e+01 1.11787e+00 151 2015 3 2.04968e+01 1.76439e+00 191 2015 4 2.25423e+01 1.30442e+00 271 2015 5 2.63416e+01 2.38271e+00 552 2015 6 2.98147e+01 1.42449e+00 476 2015 7 2.98363e+01 1.45988e+00 524 2015 8 2.96630e+01 1.36925e+00 657 2015 9 2.79934e+01 2.15419e+00 417 2015 10 2.37567e+01 1.63403e+00 461 2015 11 2.30558e+01 2.12454e+00 241 2015 12 1.89449e+01 1.54961e+00 94 2016 1 1.36881e+01 7.67389e-01 32 2016 2 1.52377e+01 2.07044e+00 265 2016 3 1.79135e+01 1.58548e+00 252 2016 4 2.16549e+01 2.12021e+00 420 2016 5 2.55807e+01 2.16531e+00 418 2016 6 2.94502e+01 1.73927e+00 497 2016 7 3.05657e+01 1.51219e+00 556 2016 8 3.01372e+01 1.55211e+00 375 2016 9 2.90197e+01 1.45847e+00 593 2016 10 2.55138e+01 1.62721e+00 546 2016 11 2.19189e+01 2.37258e+00 239 2016 12 1.77018e+01 1.14136e+00 133 2017 1 1.65322e+01 2.31929e+00 137 2017 2 1.78973e+01 1.71880e+00 268 2017 3 1.85996e+01 2.20962e+00 378 2017 4 2.28970e+01 2.01499e+00 516 2017 5 2.48765e+01 2.21583e+00 384 2017 6 2.78230e+01 1.67482e+00 205 2017 7 2.98610e+01 1.65055e+00 646 2017 8 2.98548e+01 1.65467e+00 389 2017 9 2.76349e+01 2.07184e+00 525 2017 10 2.49736e+01 2.31737e+00 516 2017 11 2.12706e+01 1.48603e+00 309 2017 12 1.85692e+01 1.62677e+00 105 2018 1 1.48500e+01 1.11895e+00 8 2018 2 2.07719e+01 2.58894e+00 314 2018 3 1.77288e+01 1.84725e+00 233 2018 4 2.07692e+01 1.52190e+00 426 2018 5 2.66226e+01 2.21030e+00 586 2018 6 2.89436e+01 1.43547e+00 472 2018 7 2.94913e+01 1.36648e+00 408 2018 8 2.96164e+01 1.72371e+00 536 2018 9 2.96303e+01 1.61956e+00 529 2018 10 2.62615e+01 2.53871e+00 609 2018 11 2.16745e+01 1.70896e+00 115 2018 12 1.55693e+01 1.40257e+00 111 2019 1 1.45899e+01 1.58320e+00 135 2019 2 1.82068e+01 2.27384e+00 109 2019 3 1.76890e+01 1.65525e+00 255 2019 4 2.10401e+01 2.02390e+00 342 2019 5 2.71432e+01 2.42814e+00 662 2019 6 2.91145e+01 1.63216e+00 426 2019 7 2.98482e+01 1.69796e+00 537 2019 8 2.98279e+01 1.43909e+00 458 2019 9 2.98731e+01 1.80487e+00 824 2019 10 2.73881e+01 2.62763e+00 431 2019 11 1.86428e+01 9.96161e-01 146 2019 12 1.70028e+01 1.32745e+00 138 2020 1 1.56376e+01 1.94424e+00 204 2020 2 1.57407e+01 1.33966e+00 272 2020 3 2.19386e+01 3.99033e+00 346 2020 4 2.32735e+01 1.37445e+00 292 2020 5 2.50268e+01 2.53271e+00 622 2020 6 2.86501e+01 1.39761e+00 377 2020 7 2.99592e+01 1.31002e+00 499 2020 8 3.07459e+01 1.18424e+00 479 2020 9 2.82174e+01 2.52891e+00 411 2020 10 2.45060e+01 1.53233e+00 528 2020 11 2.12014e+01 1.76364e+00 542 2020 12 1.52933e+01 9.78497e-01 168 2021 1 1.55326e+01 1.72219e+00 254 2021 2 1.38892e+01 2.02307e+00 222 2021 3 1.84599e+01 2.38120e+00 396 2021 4 2.11514e+01 2.08649e+00 523 2021 5 2.50957e+01 2.06437e+00 520 2021 6 2.79687e+01 1.78168e+00 355 2021 7 2.94555e+01 1.63124e+00 335 2021 8 2.96987e+01 1.51723e+00 421 2021 9 2.74207e+01 1.96082e+00 536 2021 10 2.51863e+01 2.05328e+00 395 2021 11 1.86520e+01 1.33344e+00 473 2021 12 1.79258e+01 1.74795e+00 342 2022 1 1.42263e+01 2.73945e+00 220 2022 2 1.54553e+01 2.45108e+00 391 2022 3 1.86722e+01 1.72097e+00 463 2022 4 2.26944e+01 1.55436e+00 304 2022 5 2.64683e+01 1.44054e+00 577 2022 6 3.00680e+01 1.86746e+00 572 2022 7 3.00484e+01 1.62041e+00 495 2022 8 2.99312e+01 1.65190e+00 404 2022 9 2.84681e+01 2.08433e+00 628 2022 10 2.30184e+01 2.14101e+00 538 2022 11 2.11924e+01 2.41957e+00 426 2022 12 1.82105e+01 2.60792e+00 298 2023 1 1.67088e+01 2.18974e+00 461 2023 2 1.78616e+01 2.64289e+00 339 2023 3 2.01215e+01 2.66367e+00 320 2023 4 2.21199e+01 1.64207e+00 338 2023 5 2.60611e+01 2.27330e+00 555 2023 6 2.88643e+01 2.35008e+00 536 2023 7 3.09850e+01 1.60597e+00 592 2023 8 3.17271e+01 1.36424e+00 857 2023 9 2.91734e+01 1.65425e+00 577 2023 10 2.40596e+01 2.24272e+00 611 2023 11 1.87398e+01 1.48110e+00 410 2023 12 1.45091e+01 1.39139e+00 330 2024 1 1.28280e+01 1.58139e+00 221 2024 2 1.53403e+01 1.70588e+00 386 2024 3 1.90627e+01 1.66926e+00 309 2024 4 2.19320e+01 1.20491e+00 27