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 5.94233e+01 1.36224e-01 274 2002 8 5.85729e+01 3.92824e-01 192 2002 9 5.69309e+01 2.57481e-01 131 2002 10 5.03200e+01 1.96008e+00 449 2002 11 4.43328e+01 1.72720e+00 886 2002 12 4.06919e+01 3.87275e-01 1025 2003 1 4.26595e+01 1.43087e+00 842 2003 2 4.86789e+01 1.48580e+00 687 2003 3 5.40644e+01 1.80816e+00 465 2003 4 5.88717e+01 6.91498e-01 317 2003 5 5.95768e+01 1.04138e-01 255 2003 6 5.92988e+01 4.23166e-01 109 2003 7 5.92550e+01 7.41561e-02 64 2003 8 5.85139e+01 2.88668e-01 127 2003 9 5.50253e+01 1.08116e+00 271 2003 10 5.09535e+01 1.58089e+00 483 2003 11 4.31695e+01 1.68561e+00 380 2003 12 4.05078e+01 3.75010e-01 753 2004 1 4.28427e+01 1.34850e+00 991 2004 2 4.83436e+01 2.00318e+00 694 2004 3 5.50008e+01 1.88335e+00 571 2004 4 5.89952e+01 7.45951e-01 524 2004 5 nan nan 0 2004 6 5.92444e+01 3.38873e-01 224 2004 7 5.92246e+01 2.86766e-01 341 2004 8 5.81911e+01 7.16180e-01 299 2004 9 5.55053e+01 1.35749e+00 111 2004 10 4.96318e+01 1.35183e+00 463 2004 11 4.36249e+01 1.49134e+00 653 2004 12 4.05514e+01 3.30817e-01 750 2005 1 4.25876e+01 1.50145e+00 581 2005 2 4.86671e+01 1.83308e+00 475 2005 3 5.50613e+01 1.30246e+00 638 2005 4 5.88213e+01 9.38430e-01 506 2005 5 5.97794e+01 2.72690e-01 147 2005 6 5.91762e+01 1.49475e-01 64 2005 7 5.89022e+01 7.58941e-02 64 2005 8 5.73784e+01 3.20117e-01 64 2005 9 5.51686e+01 1.11180e+00 317 2005 10 4.82958e+01 9.08495e-01 252 2005 11 4.43917e+01 1.42214e+00 709 2005 12 4.07175e+01 3.40742e-01 963 2006 1 4.31328e+01 1.49674e+00 590 2006 2 4.91240e+01 1.73516e+00 687 2006 3 5.42137e+01 1.48795e+00 696 2006 4 5.89233e+01 8.10921e-01 369 2006 5 5.96552e+01 9.86515e-02 383 2006 6 nan nan 0 2006 7 5.93639e+01 9.77956e-03 45 2006 8 5.83637e+01 3.17982e-01 64 2006 9 5.44689e+01 7.63345e-01 245 2006 10 5.00119e+01 1.98047e+00 448 2006 11 4.40556e+01 1.46289e+00 632 2006 12 4.05001e+01 3.32500e-01 896 2007 1 4.26145e+01 1.49955e+00 898 2007 2 4.82852e+01 2.03047e+00 687 2007 3 5.45208e+01 2.18655e+00 382 2007 4 5.86095e+01 6.33275e-01 320 2007 5 5.96972e+01 9.91231e-02 228 2007 6 5.92439e+01 1.46848e-01 150 2007 7 5.92230e+01 2.18148e-01 192 2007 8 5.84717e+01 3.90760e-01 98 2007 9 5.64879e+01 1.12138e+00 268 2007 10 5.01985e+01 1.00538e+00 253 2007 11 4.32199e+01 1.48398e+00 332 2007 12 4.05687e+01 3.18021e-01 1024 2008 1 4.24600e+01 1.32943e+00 960 2008 2 4.91221e+01 1.53583e+00 639 2008 3 5.47815e+01 1.31297e+00 448 2008 4 5.91348e+01 6.22296e-01 220 2008 5 5.96928e+01 2.61757e-02 350 2008 6 5.91271e+01 1.65106e-01 128 2008 7 5.91307e+01 8.84888e-02 128 2008 8 5.78461e+01 8.23324e-01 184 2008 9 5.47663e+01 1.54236e+00 127 2008 10 4.96340e+01 1.97740e+00 567 2008 11 4.41670e+01 1.37101e+00 571 2008 12 4.06264e+01 3.27768e-01 1164 2009 1 4.29340e+01 1.45865e+00 1141 2009 2 4.83623e+01 1.71536e+00 602 2009 3 5.48298e+01 1.81525e+00 399 2009 4 5.89340e+01 8.26143e-01 363 2009 5 5.95731e+01 2.16617e-01 128 2009 6 5.93502e+01 3.21979e-01 154 2009 7 5.93283e+01 1.62859e-01 225 2009 8 5.90391e+01 2.01340e-01 173 2009 9 5.50389e+01 1.41829e+00 272 2009 10 5.01762e+01 1.51465e+00 416 2009 11 4.35955e+01 1.52568e+00 922 2009 12 4.07015e+01 3.78779e-01 880 2010 1 4.28953e+01 1.32466e+00 706 2010 2 4.77146e+01 1.48065e+00 803 2010 3 5.57396e+01 1.03900e+00 390 2010 4 5.89460e+01 6.50827e-01 128 2010 5 5.97060e+01 2.80100e-01 345 2010 6 5.87630e+01 1.96571e-01 70 2010 7 5.93626e+01 2.21829e-01 123 2010 8 5.85188e+01 4.84804e-01 358 2010 9 5.65292e+01 5.04517e-01 174 2010 10 4.91222e+01 1.26790e+00 446 2010 11 4.32588e+01 1.01287e+00 225 2010 12 4.09752e+01 4.46892e-01 544 2011 1 4.38741e+01 9.36045e-01 531 2011 2 4.84513e+01 2.13370e+00 590 2011 3 5.46910e+01 1.57277e+00 708 2011 4 5.91829e+01 6.43067e-01 503 2011 5 5.96174e+01 1.06572e-01 227 2011 6 5.89844e+01 1.62321e-01 64 2011 7 5.91674e+01 5.93166e-02 70 2011 8 5.88288e+01 3.30492e-01 234 2011 9 5.51247e+01 1.39695e+00 304 2011 10 4.87327e+01 1.53774e+00 384 2011 11 4.33271e+01 1.30500e+00 516 2011 12 4.07151e+01 3.55717e-01 842 2012 1 4.25530e+01 1.34811e+00 1042 2012 2 4.84697e+01 1.76372e+00 636 2012 3 5.50460e+01 1.54327e+00 462 2012 4 5.92298e+01 2.86925e-01 421 2012 5 5.95347e+01 4.53317e-02 227 2012 6 5.91473e+01 1.46829e-01 164 2012 7 5.92572e+01 2.16985e-01 229 2012 8 5.83304e+01 3.34164e-01 49 2012 9 5.59543e+01 1.14167e+00 254 2012 10 5.03497e+01 2.16278e+00 333 2012 11 4.37411e+01 1.41529e+00 699 2012 12 4.06160e+01 2.17737e-01 736 2013 1 4.22214e+01 1.67680e+00 559 2013 2 4.91542e+01 1.82239e+00 560 2013 3 5.46879e+01 1.50608e+00 419 2013 4 5.92664e+01 6.30683e-01 232 2013 5 5.96012e+01 1.14363e-01 258 2013 6 nan nan 0 2013 7 5.91315e+01 1.52297e-01 248 2013 8 5.86490e+01 5.78277e-01 131 2013 9 5.44899e+01 8.19544e-01 265 2013 10 4.95589e+01 1.98157e+00 308 2013 11 4.34518e+01 1.11251e+00 681 2013 12 4.05969e+01 3.29374e-01 712 2014 1 4.25208e+01 1.65229e+00 1009 2014 2 4.83692e+01 1.84587e+00 738 2014 3 5.53848e+01 1.40937e+00 417 2014 4 5.88864e+01 8.51149e-01 535 2014 5 5.96865e+01 1.41652e-01 243 2014 6 5.91577e+01 1.30441e-01 148 2014 7 5.92660e+01 8.03028e-02 181 2014 8 5.89440e+01 2.48247e-01 42 2014 9 5.57829e+01 1.17073e+00 369 2014 10 4.93625e+01 1.90220e+00 395 2014 11 4.35345e+01 1.34694e+00 802 2014 12 4.06068e+01 3.29546e-01 954 2015 1 4.25463e+01 1.49826e+00 816 2015 2 4.80422e+01 2.02913e+00 584 2015 3 5.48474e+01 1.48084e+00 592 2015 4 5.87863e+01 7.25604e-01 381 2015 5 nan nan 0 2015 6 5.96831e+01 1.11127e-02 32 2015 7 5.92673e+01 1.34549e-01 177 2015 8 5.88573e+01 3.61936e-01 230 2015 9 5.53731e+01 1.47193e+00 563 2015 10 4.91699e+01 1.71666e+00 446 2015 11 4.39352e+01 1.03551e+00 411 2015 12 4.05811e+01 3.79328e-01 849 2016 1 4.21359e+01 1.26496e+00 709 2016 2 4.87819e+01 1.93518e+00 498 2016 3 5.64978e+01 7.85249e-01 189 2016 4 5.88801e+01 4.20766e-01 393 2016 5 5.96199e+01 2.43663e-01 268 2016 6 5.89973e+01 1.59043e-01 128 2016 7 5.94386e+01 1.25471e-01 128 2016 8 5.84351e+01 4.35174e-01 190 2016 9 5.55685e+01 1.06533e+00 494 2016 10 4.94582e+01 1.56178e+00 512 2016 11 4.38857e+01 1.32694e+00 424 2016 12 4.06537e+01 3.27979e-01 813 2017 1 4.31162e+01 1.49257e+00 864 2017 2 4.87239e+01 1.60866e+00 656 2017 3 5.46658e+01 2.29892e+00 326 2017 4 5.86046e+01 7.39103e-01 580 2017 5 5.95601e+01 1.00622e-01 417 2017 6 5.91311e+01 3.36231e-01 384 2017 7 5.91749e+01 2.42713e-01 197 2017 8 5.88921e+01 2.96626e-01 128 2017 9 5.54890e+01 4.17185e-01 51 2017 10 5.10337e+01 1.68377e+00 159 2017 11 4.34775e+01 1.73946e+00 704 2017 12 4.05192e+01 3.26341e-01 732 2018 1 4.26280e+01 1.60002e+00 896 2018 2 4.94174e+01 2.16332e+00 265 2018 3 5.44322e+01 1.81682e+00 577 2018 4 5.90698e+01 7.37732e-01 453 2018 5 5.97186e+01 9.86009e-02 273 2018 6 5.92116e+01 2.72646e-01 302 2018 7 5.94586e+01 8.15687e-03 42 2018 8 5.85086e+01 5.50402e-01 395 2018 9 5.53945e+01 1.29779e+00 380 2018 10 4.80435e+01 8.79008e-01 343 2018 11 4.36900e+01 1.58518e+00 885 2018 12 4.07497e+01 4.11980e-01 1050 2019 1 4.22011e+01 1.35983e+00 792 2019 2 4.79448e+01 1.62570e+00 492 2019 3 5.50482e+01 1.06268e+00 463 2019 4 5.89707e+01 8.06239e-01 378 2019 5 5.96255e+01 1.47042e-02 64 2019 6 5.92580e+01 3.01865e-01 320 2019 7 5.92572e+01 2.28454e-01 476 2019 8 5.80885e+01 5.37718e-01 256 2019 9 5.59800e+01 9.72846e-01 159 2019 10 5.01184e+01 1.36530e+00 422 2019 11 4.40889e+01 1.55880e+00 916 2019 12 4.06556e+01 3.99327e-01 875 2020 1 4.23532e+01 1.44604e+00 799 2020 2 4.81545e+01 1.89599e+00 614 2020 3 5.42049e+01 1.89868e+00 384 2020 4 5.90014e+01 8.13719e-01 728 2020 5 5.94844e+01 2.99813e-01 406 2020 6 5.90767e+01 1.87477e-01 300 2020 7 5.93008e+01 1.28525e-01 167 2020 8 5.90058e+01 3.29017e-01 128 2020 9 5.46122e+01 1.00046e+00 180 2020 10 4.94627e+01 9.07115e-01 398 2020 11 4.31886e+01 1.55843e+00 445 2020 12 4.05658e+01 3.57777e-01 912 2021 1 4.25677e+01 1.11553e+00 900 2021 2 4.88824e+01 1.85117e+00 630 2021 3 5.45031e+01 1.77164e+00 480 2021 4 5.89159e+01 7.05778e-01 258 2021 5 5.96252e+01 1.68751e-01 440 2021 6 5.89657e+01 1.80110e-01 124 2021 7 5.91312e+01 1.86304e-01 114 2021 8 5.86797e+01 6.16255e-01 256 2021 9 5.45311e+01 1.09859e+00 374 2021 10 5.01813e+01 2.27897e+00 380 2021 11 4.37749e+01 1.49569e+00 681 2021 12 4.05559e+01 2.86028e-01 892 2022 1 4.28594e+01 1.47739e+00 949 2022 2 4.81347e+01 1.87546e+00 660 2022 3 5.39048e+01 1.19005e+00 308 2022 4 5.96301e+01 1.28084e-01 128 2022 5 5.95746e+01 1.34697e-01 320 2022 6 5.92494e+01 3.94469e-01 516 2022 7 5.92603e+01 7.45908e-02 64 2022 8 5.78294e+01 2.49153e-01 175 2022 9 5.66712e+01 4.05632e-02 38 2022 10 5.17988e+01 9.43098e-01 214 2022 11 4.34207e+01 1.16157e+00 526 2022 12 4.06009e+01 3.60201e-01 950 2023 1 4.25021e+01 1.21323e+00 1054 2023 2 4.87391e+01 2.14078e+00 698 2023 3 5.44357e+01 1.93776e+00 537 2023 4 5.92817e+01 7.48865e-01 397 2023 5 5.97029e+01 2.44376e-01 331 2023 6 5.90219e+01 1.77537e-01 192 2023 7 5.92249e+01 6.14105e-02 64 2023 8 5.82486e+01 6.87870e-01 299 2023 9 5.55683e+01 1.41618e+00 485 2023 10 5.06943e+01 9.51443e-01 366 2023 11 4.37957e+01 1.65465e+00 638 2023 12 4.07786e+01 4.75026e-01 847 2024 1 4.21446e+01 1.10067e+00 897 2024 2 4.90748e+01 1.58986e+00 601 2024 3 5.50610e+01 1.60540e+00 556 2024 4 5.79123e+01 1.75765e-02 64