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 5.89596e+01 7.75053e-02 113 2002 8 5.87655e+01 1.34103e-02 64 2002 9 5.57664e+01 9.16552e-01 260 2002 10 4.99112e+01 1.91462e+00 562 2002 11 4.32838e+01 1.32165e+00 709 2002 12 4.03572e+01 3.51022e-01 509 2003 1 4.22289e+01 1.37396e+00 664 2003 2 4.93920e+01 1.79029e+00 488 2003 3 5.43836e+01 1.81358e+00 880 2003 4 5.87617e+01 4.11999e-01 221 2003 5 5.97580e+01 1.40741e-01 181 2003 6 5.99073e+01 7.70166e-02 66 2003 7 5.89005e+01 3.71565e-02 71 2003 8 5.81810e+01 6.39059e-01 267 2003 9 5.44893e+01 1.10295e+00 310 2003 10 5.02210e+01 1.56179e+00 398 2003 11 4.40053e+01 2.03873e+00 368 2003 12 4.03296e+01 4.09115e-01 554 2004 1 4.29771e+01 1.35521e+00 546 2004 2 4.86671e+01 2.07001e+00 605 2004 3 5.54213e+01 1.37468e+00 532 2004 4 5.85500e+01 6.55045e-01 576 2004 5 5.95134e+01 2.22078e-02 64 2004 6 5.97920e+01 1.82489e-01 241 2004 7 5.88709e+01 1.34457e-01 220 2004 8 5.74805e+01 2.61292e-01 194 2004 9 5.44621e+01 1.05014e+00 302 2004 10 5.00164e+01 1.79823e+00 324 2004 11 4.36772e+01 1.88028e+00 377 2004 12 4.01681e+01 2.06730e-01 205 2005 1 4.30993e+01 1.26221e+00 397 2005 2 4.85640e+01 1.72194e+00 768 2005 3 5.43888e+01 1.36487e+00 637 2005 4 5.84750e+01 7.82401e-01 395 2005 5 5.98626e+01 9.56567e-02 138 2005 6 5.97597e+01 9.30621e-03 64 2005 7 5.87927e+01 2.59200e-01 155 2005 8 5.84377e+01 1.99142e-01 226 2005 9 5.55340e+01 1.18951e+00 445 2005 10 4.75355e+01 9.53265e-01 74 2005 11 4.32185e+01 1.63303e+00 538 2005 12 4.04210e+01 2.93170e-01 598 2006 1 4.31506e+01 8.17998e-01 291 2006 2 4.96931e+01 1.52039e+00 625 2006 3 5.42169e+01 1.79436e+00 538 2006 4 5.93364e+01 4.25610e-01 266 2006 5 5.97908e+01 1.41630e-01 475 2006 6 5.99017e+01 1.89008e-01 72 2006 7 5.92243e+01 2.64693e-01 223 2006 8 5.81583e+01 7.07864e-01 256 2006 9 5.42047e+01 9.82857e-01 396 2006 10 4.84883e+01 1.40863e+00 220 2006 11 4.39718e+01 1.73640e+00 795 2006 12 4.02215e+01 2.29719e-01 296 2007 1 4.16149e+01 1.22197e+00 834 2007 2 4.82063e+01 1.71562e+00 505 2007 3 5.34938e+01 1.56905e+00 264 2007 4 5.84301e+01 7.30196e-01 297 2007 5 5.98882e+01 6.39959e-02 148 2007 6 5.96693e+01 8.02470e-02 222 2007 7 5.88529e+01 1.56937e-01 179 2007 8 5.81817e+01 5.15614e-01 204 2007 9 5.62989e+01 8.01665e-01 219 2007 10 4.96146e+01 6.45702e-01 190 2007 11 4.42594e+01 1.65176e+00 483 2007 12 4.02373e+01 2.31635e-01 821 2008 1 4.23638e+01 1.78319e+00 558 2008 2 4.82031e+01 1.92184e+00 495 2008 3 5.34792e+01 1.08158e+00 362 2008 4 5.86395e+01 4.08893e-01 128 2008 5 5.97875e+01 9.02973e-02 320 2008 6 5.97252e+01 1.59269e-02 29 2008 7 5.87971e+01 1.02582e-01 93 2008 8 5.84228e+01 1.21092e-01 137 2008 9 5.49956e+01 1.50323e+00 177 2008 10 4.92930e+01 1.91055e+00 457 2008 11 4.33760e+01 1.20938e+00 535 2008 12 4.02414e+01 2.66755e-01 623 2009 1 4.21242e+01 1.38967e+00 656 2009 2 4.90052e+01 1.90653e+00 550 2009 3 5.50895e+01 1.46453e+00 526 2009 4 5.82031e+01 5.04640e-01 357 2009 5 5.99760e+01 5.92104e-03 64 2009 6 nan nan 0 2009 7 5.91185e+01 2.74743e-01 88 2009 8 5.74683e+01 1.17283e-02 64 2009 9 5.46019e+01 1.17872e+00 353 2009 10 4.94480e+01 1.84974e+00 471 2009 11 4.34145e+01 1.71822e+00 563 2009 12 4.03176e+01 2.84029e-01 203 2010 1 4.25659e+01 1.60132e+00 501 2010 2 4.76317e+01 1.20015e+00 411 2010 3 5.51354e+01 1.51904e+00 403 2010 4 5.76336e+01 3.20331e-01 121 2010 5 5.97826e+01 1.41592e-01 118 2010 6 5.96117e+01 7.47216e-02 233 2010 7 5.87448e+01 1.08779e-01 90 2010 8 5.81503e+01 3.92398e-01 307 2010 9 5.46899e+01 1.00817e+00 214 2010 10 4.99380e+01 1.23959e+00 508 2010 11 4.34448e+01 6.21711e-01 242 2010 12 4.03754e+01 2.97046e-01 387 2011 1 4.31189e+01 1.32573e+00 669 2011 2 4.81977e+01 1.67240e+00 568 2011 3 5.39312e+01 1.35434e+00 359 2011 4 5.84953e+01 7.60403e-01 354 2011 5 5.95593e+01 4.54816e-02 66 2011 6 5.96706e+01 1.09923e-02 14 2011 7 5.87317e+01 1.10574e-02 52 2011 8 5.79377e+01 5.94284e-01 128 2011 9 5.52075e+01 1.77340e+00 309 2011 10 4.90048e+01 1.27852e+00 209 2011 11 4.23380e+01 6.73827e-01 493 2011 12 4.03156e+01 2.36550e-01 734 2012 1 4.15524e+01 9.81786e-01 615 2012 2 4.93908e+01 1.95590e+00 566 2012 3 5.56399e+01 2.49414e-02 93 2012 4 5.85037e+01 4.57318e-01 211 2012 5 5.97988e+01 9.86260e-02 187 2012 6 5.97341e+01 6.33856e-02 195 2012 7 5.88541e+01 3.02916e-02 15 2012 8 5.70951e+01 3.25075e-02 64 2012 9 5.48292e+01 1.36908e+00 442 2012 10 4.97118e+01 1.87106e+00 286 2012 11 4.33983e+01 1.55437e+00 579 2012 12 4.02684e+01 2.62963e-01 431 2013 1 4.23090e+01 1.33945e+00 414 2013 2 4.85146e+01 1.98779e+00 839 2013 3 5.46427e+01 1.41496e+00 558 2013 4 5.86872e+01 4.80282e-01 224 2013 5 5.98049e+01 8.30473e-02 115 2013 6 nan nan 0 2013 7 5.87353e+01 1.20425e-01 130 2013 8 5.84296e+01 2.98534e-01 164 2013 9 5.40576e+01 6.22017e-01 262 2013 10 5.08235e+01 1.83643e+00 268 2013 11 4.34443e+01 1.17427e+00 349 2013 12 4.02455e+01 2.83331e-01 614 2014 1 4.26381e+01 1.68503e+00 573 2014 2 4.84632e+01 1.99159e+00 487 2014 3 5.46225e+01 1.66102e+00 694 2014 4 5.95323e+01 1.58051e-02 128 2014 5 5.97058e+01 1.15790e-01 252 2014 6 5.96828e+01 4.38315e-02 128 2014 7 5.88360e+01 1.05564e-01 58 2014 8 5.79990e+01 2.95068e-01 94 2014 9 5.49724e+01 1.46462e+00 211 2014 10 4.90627e+01 1.68557e+00 336 2014 11 4.32341e+01 1.69060e+00 562 2014 12 4.03717e+01 3.20311e-01 458 2015 1 4.19062e+01 1.20220e+00 689 2015 2 4.87094e+01 1.66280e+00 633 2015 3 5.63160e+01 1.09878e+00 395 2015 4 5.91184e+01 3.47023e-01 256 2015 5 5.97996e+01 1.01687e-02 64 2015 6 5.97507e+01 8.35132e-02 187 2015 7 5.87399e+01 2.18301e-02 64 2015 8 5.84388e+01 3.33720e-01 394 2015 9 5.40984e+01 1.22648e+00 365 2015 10 4.95064e+01 1.75736e+00 334 2015 11 4.34888e+01 1.30903e+00 393 2015 12 4.02359e+01 2.20932e-01 594 2016 1 4.19465e+01 1.26471e+00 498 2016 2 4.84756e+01 2.24948e+00 666 2016 3 5.46459e+01 1.61297e+00 237 2016 4 5.83422e+01 5.69110e-01 384 2016 5 6.00048e+01 1.48991e-02 65 2016 6 5.96831e+01 6.63040e-02 89 2016 7 5.89743e+01 9.74804e-02 226 2016 8 5.82360e+01 3.92949e-01 261 2016 9 5.47442e+01 1.12851e+00 607 2016 10 4.80467e+01 1.54783e+00 230 2016 11 4.32841e+01 1.72701e+00 170 2016 12 4.02735e+01 1.79143e-01 519 2017 1 4.22457e+01 1.09564e+00 635 2017 2 4.87381e+01 1.60342e+00 742 2017 3 5.49862e+01 1.33570e+00 413 2017 4 5.82697e+01 6.24242e-01 388 2017 5 5.96306e+01 9.70050e-02 176 2017 6 5.96705e+01 1.04077e-01 138 2017 7 5.88871e+01 1.19417e-01 120 2017 8 5.76532e+01 2.55603e-01 128 2017 9 5.65906e+01 3.61156e-01 92 2017 10 5.02358e+01 2.19947e+00 212 2017 11 4.32438e+01 1.55903e+00 417 2017 12 4.02068e+01 1.35508e-01 377 2018 1 4.24374e+01 1.62900e+00 721 2018 2 4.88819e+01 1.73752e+00 546 2018 3 5.42315e+01 1.89853e+00 519 2018 4 5.85115e+01 7.59686e-01 281 2018 5 5.98205e+01 6.95164e-02 288 2018 6 5.97585e+01 9.41751e-02 97 2018 7 5.86682e+01 1.96796e-02 64 2018 8 5.78014e+01 5.10086e-01 208 2018 9 5.57417e+01 1.05533e+00 196 2018 10 4.89511e+01 1.65630e+00 677 2018 11 4.23257e+01 6.36111e-01 528 2018 12 4.04477e+01 3.37860e-01 506 2019 1 4.23481e+01 1.73666e+00 697 2019 2 4.84588e+01 2.00562e+00 520 2019 3 5.49072e+01 1.42745e+00 393 2019 4 5.85634e+01 9.75716e-01 414 2019 5 nan nan 0 2019 6 5.97376e+01 1.02395e-01 252 2019 7 5.89320e+01 9.61129e-02 214 2019 8 5.85403e+01 1.83573e-01 138 2019 9 5.54865e+01 1.55228e+00 185 2019 10 5.02471e+01 1.74049e+00 618 2019 11 4.31394e+01 1.48144e+00 597 2019 12 4.02653e+01 3.05373e-01 896 2020 1 4.18060e+01 1.27300e+00 240 2020 2 4.83222e+01 1.80583e+00 617 2020 3 5.47747e+01 2.08384e+00 492 2020 4 5.85399e+01 8.29645e-01 470 2020 5 5.98640e+01 2.77425e-02 58 2020 6 5.97407e+01 1.11903e-01 327 2020 7 5.90005e+01 7.47914e-02 180 2020 8 5.86408e+01 1.31331e-01 143 2020 9 5.47759e+01 7.07105e-01 208 2020 10 4.89602e+01 1.07915e+00 369 2020 11 4.35793e+01 1.57908e+00 361 2020 12 4.02419e+01 3.61443e-01 591 2021 1 4.22692e+01 1.76782e+00 462 2021 2 4.85968e+01 1.70263e+00 489 2021 3 5.43442e+01 1.07174e+00 512 2021 4 5.84113e+01 7.26166e-01 414 2021 5 5.97857e+01 6.83786e-02 219 2021 6 5.96477e+01 2.12788e-03 32 2021 7 5.91555e+01 2.38056e-01 281 2021 8 5.86408e+01 2.33973e-01 232 2021 9 5.43304e+01 1.43055e+00 450 2021 10 4.83664e+01 1.16369e+00 171 2021 11 4.34668e+01 1.70147e+00 545 2021 12 4.01883e+01 1.98631e-01 662 2022 1 4.23322e+01 1.17762e+00 707 2022 2 4.92071e+01 1.67942e+00 412 2022 3 5.49877e+01 1.74472e+00 176 2022 4 5.92505e+01 3.61336e-01 120 2022 5 5.97009e+01 9.72171e-02 128 2022 6 5.97716e+01 1.15395e-01 429 2022 7 5.90677e+01 2.42584e-01 150 2022 8 5.80074e+01 5.40640e-01 273 2022 9 5.50302e+01 1.49316e+00 339 2022 10 4.96352e+01 1.57543e+00 245 2022 11 4.30671e+01 1.35207e+00 675 2022 12 4.03626e+01 3.68901e-01 1081 2023 1 4.18950e+01 1.24380e+00 967 2023 2 4.83808e+01 2.15061e+00 645 2023 3 5.43691e+01 1.43916e+00 717 2023 4 5.87312e+01 6.44123e-01 568 2023 5 5.97492e+01 1.19856e-01 415 2023 6 5.96702e+01 4.74729e-01 425 2023 7 5.86118e+01 2.13527e-02 64 2023 8 5.82892e+01 3.77431e-01 309 2023 9 5.49421e+01 1.33036e+00 409 2023 10 5.05814e+01 1.22696e+00 203 2023 11 4.35144e+01 1.78036e+00 450 2023 12 4.03678e+01 3.63883e-01 525 2024 1 4.19275e+01 1.35749e+00 531 2024 2 4.90219e+01 1.47212e+00 524 2024 3 5.47912e+01 1.62041e+00 526 2024 4 5.75312e+01 2.81310e-02 15