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 5.92753e+01 1.31770e-01 82 2002 8 5.91134e+01 2.21560e-01 48 2002 9 5.70091e+01 3.67355e-01 125 2002 10 4.92132e+01 1.70239e+00 217 2002 11 4.40723e+01 1.63120e+00 543 2002 12 4.07272e+01 4.08495e-01 523 2003 1 4.24171e+01 1.55550e+00 472 2003 2 4.79767e+01 1.60974e+00 356 2003 3 5.39142e+01 1.31705e+00 250 2003 4 5.92717e+01 4.31877e-01 81 2003 5 5.92499e+01 9.66815e-02 93 2003 6 5.91623e+01 2.27103e-01 53 2003 7 5.91711e+01 2.24772e-01 63 2003 8 5.92015e+01 1.69870e-02 34 2003 9 5.52000e+01 1.32945e+00 210 2003 10 5.01908e+01 1.97346e+00 293 2003 11 4.23092e+01 3.78356e-01 146 2003 12 4.05715e+01 4.16145e-01 502 2004 1 4.22953e+01 1.13415e+00 527 2004 2 4.86146e+01 2.11302e+00 375 2004 3 5.52859e+01 1.70940e+00 379 2004 4 5.84665e+01 5.76863e-01 161 2004 5 5.95467e+01 9.44097e-04 3 2004 6 5.91488e+01 1.01945e-01 102 2004 7 5.91513e+01 6.96708e-03 45 2004 8 5.84289e+01 7.78632e-01 153 2004 9 5.49545e+01 1.03740e+00 101 2004 10 4.97067e+01 1.18033e+00 114 2004 11 4.30259e+01 1.41474e+00 295 2004 12 4.04604e+01 3.46816e-01 389 2005 1 4.25208e+01 1.36365e+00 355 2005 2 4.80673e+01 1.49749e+00 354 2005 3 5.60022e+01 1.06522e+00 192 2005 4 5.87382e+01 9.25001e-01 298 2005 5 5.96883e+01 3.46097e-01 105 2005 6 5.92580e+01 0.00000e+00 1 2005 7 5.89012e+01 2.43817e-01 24 2005 8 5.76157e+01 5.23791e-03 8 2005 9 5.52314e+01 9.12856e-01 105 2005 10 4.79092e+01 1.00041e+00 109 2005 11 4.45085e+01 8.87695e-01 226 2005 12 4.07341e+01 3.46289e-01 704 2006 1 4.29793e+01 1.28237e+00 192 2006 2 4.96805e+01 1.53513e+00 281 2006 3 5.41445e+01 1.33280e+00 375 2006 4 5.90524e+01 7.09036e-01 200 2006 5 5.94720e+01 8.64899e-02 143 2006 6 nan nan 0 2006 7 5.90581e+01 2.18494e-01 58 2006 8 5.86279e+01 2.40480e-02 55 2006 9 5.44546e+01 8.52732e-01 160 2006 10 4.94698e+01 2.08700e+00 220 2006 11 4.39994e+01 1.48727e+00 488 2006 12 4.05295e+01 3.46035e-01 530 2007 1 4.28909e+01 1.59639e+00 504 2007 2 4.84136e+01 1.55025e+00 242 2007 3 5.40679e+01 2.27489e+00 203 2007 4 5.85472e+01 6.76879e-01 206 2007 5 5.94282e+01 1.03954e-01 105 2007 6 5.92920e+01 2.30960e-03 9 2007 7 5.90308e+01 2.51021e-01 67 2007 8 5.86656e+01 2.88740e-01 93 2007 9 5.68383e+01 8.13782e-01 54 2007 10 4.95865e+01 7.84218e-01 133 2007 11 4.25275e+01 1.05629e+00 162 2007 12 4.06287e+01 3.81359e-01 448 2008 1 4.24784e+01 1.20371e+00 462 2008 2 4.88743e+01 2.02945e+00 231 2008 3 5.46199e+01 9.76539e-01 174 2008 4 5.89677e+01 7.64136e-01 192 2008 5 5.94629e+01 8.48856e-02 121 2008 6 5.92488e+01 1.27274e-01 102 2008 7 5.91100e+01 1.70654e-01 108 2008 8 5.84193e+01 8.45789e-01 137 2008 9 5.62986e+01 1.68401e-02 59 2008 10 4.98427e+01 2.02667e+00 351 2008 11 4.37615e+01 1.70053e+00 268 2008 12 4.04933e+01 3.66471e-01 527 2009 1 4.29999e+01 1.50677e+00 645 2009 2 4.84950e+01 1.74606e+00 384 2009 3 5.45437e+01 1.93337e+00 281 2009 4 5.89463e+01 7.30618e-01 281 2009 5 5.93057e+01 1.90976e-01 137 2009 6 5.92358e+01 2.58216e-01 105 2009 7 5.91814e+01 1.39487e-01 58 2009 8 5.88405e+01 5.39095e-01 136 2009 9 5.50467e+01 1.52709e+00 108 2009 10 5.02888e+01 1.72748e+00 155 2009 11 4.39577e+01 1.59775e+00 539 2009 12 4.06430e+01 4.18721e-01 447 2010 1 4.27689e+01 1.49848e+00 427 2010 2 4.84112e+01 1.67362e+00 370 2010 3 5.60596e+01 1.05641e+00 290 2010 4 5.89201e+01 7.18034e-01 78 2010 5 5.95022e+01 3.39616e-01 181 2010 6 5.90468e+01 2.89105e-01 50 2010 7 5.89700e+01 3.99971e-03 2 2010 8 5.85692e+01 2.80399e-01 148 2010 9 5.67749e+01 3.45333e-02 54 2010 10 4.86682e+01 1.11907e+00 132 2010 11 4.34271e+01 1.03123e+00 191 2010 12 4.10185e+01 4.09251e-01 261 2011 1 4.35210e+01 1.10978e+00 361 2011 2 4.88337e+01 2.07526e+00 465 2011 3 5.42904e+01 1.60395e+00 474 2011 4 5.89881e+01 6.20950e-01 375 2011 5 5.92823e+01 1.29984e-01 88 2011 6 5.91590e+01 2.13933e-01 57 2011 7 5.90296e+01 5.03689e-03 21 2011 8 5.89985e+01 4.69638e-03 42 2011 9 5.61706e+01 1.51678e+00 146 2011 10 4.92572e+01 1.70805e+00 305 2011 11 4.34762e+01 1.46352e+00 348 2011 12 4.07228e+01 3.33792e-01 545 2012 1 4.23760e+01 1.35510e+00 569 2012 2 4.84996e+01 1.81636e+00 415 2012 3 5.52204e+01 1.58632e+00 200 2012 4 5.90958e+01 4.51919e-01 191 2012 5 5.92124e+01 7.75712e-02 64 2012 6 5.92531e+01 1.30313e-01 36 2012 7 5.91858e+01 2.09041e-01 109 2012 8 5.85558e+01 8.37963e-02 51 2012 9 5.63032e+01 1.23787e+00 133 2012 10 5.08921e+01 2.45679e+00 172 2012 11 4.35286e+01 1.59759e+00 473 2012 12 4.05295e+01 1.96545e-01 399 2013 1 4.26499e+01 1.75334e+00 343 2013 2 4.90515e+01 1.97671e+00 355 2013 3 5.46615e+01 1.60920e+00 266 2013 4 5.93036e+01 7.16034e-01 146 2013 5 5.93593e+01 1.32332e-01 292 2013 6 5.89532e+01 1.01055e-02 31 2013 7 5.89937e+01 2.08901e-01 161 2013 8 5.82712e+01 5.79536e-03 37 2013 9 5.42099e+01 6.47145e-01 129 2013 10 5.07131e+01 1.94382e+00 187 2013 11 4.33969e+01 1.05884e+00 489 2013 12 4.06091e+01 4.31985e-01 562 2014 1 4.28291e+01 1.68900e+00 655 2014 2 4.91040e+01 1.79691e+00 461 2014 3 5.50988e+01 1.49360e+00 342 2014 4 5.85194e+01 8.98374e-01 310 2014 5 5.93162e+01 1.56207e-01 150 2014 6 5.91519e+01 8.18584e-02 33 2014 7 5.89823e+01 1.52537e-01 128 2014 8 nan nan 0 2014 9 5.60433e+01 9.62312e-01 151 2014 10 4.83318e+01 9.67278e-01 252 2014 11 4.36044e+01 1.55775e+00 312 2014 12 4.05586e+01 2.56492e-01 607 2015 1 4.24787e+01 1.39984e+00 511 2015 2 4.84860e+01 2.11672e+00 456 2015 3 5.47095e+01 1.40869e+00 391 2015 4 5.89611e+01 6.67501e-01 265 2015 5 nan nan 0 2015 6 nan nan 0 2015 7 5.91156e+01 1.97217e-01 84 2015 8 5.90414e+01 2.79617e-01 245 2015 9 5.52130e+01 1.49948e+00 321 2015 10 4.91674e+01 1.58709e+00 337 2015 11 4.41794e+01 1.34423e+00 178 2015 12 4.05845e+01 3.78182e-01 420 2016 1 4.22266e+01 1.29041e+00 555 2016 2 4.88073e+01 1.57150e+00 307 2016 3 5.59866e+01 9.74212e-01 225 2016 4 5.91106e+01 4.01558e-01 182 2016 5 5.93892e+01 3.89269e-01 173 2016 6 5.91459e+01 1.89992e-01 120 2016 7 5.92673e+01 1.29388e-01 90 2016 8 5.91641e+01 1.21502e-01 66 2016 9 5.58942e+01 1.09584e+00 308 2016 10 4.91890e+01 1.49014e+00 209 2016 11 4.34815e+01 1.30330e+00 193 2016 12 4.05217e+01 1.94952e-01 477 2017 1 4.31567e+01 1.54859e+00 616 2017 2 4.87146e+01 1.80333e+00 412 2017 3 5.36994e+01 2.23068e+00 172 2017 4 5.83766e+01 8.05690e-01 213 2017 5 5.93224e+01 1.05083e-01 305 2017 6 5.92779e+01 2.11021e-01 132 2017 7 5.89662e+01 2.77339e-01 148 2017 8 5.92053e+01 2.53467e-02 115 2017 9 5.62570e+01 1.25658e-02 49 2017 10 5.09650e+01 1.64710e+00 158 2017 11 4.30842e+01 1.67880e+00 331 2017 12 4.05280e+01 3.72890e-01 409 2018 1 4.27010e+01 1.46695e+00 198 2018 2 4.94091e+01 1.25119e+00 276 2018 3 5.46631e+01 2.08525e+00 329 2018 4 5.88748e+01 7.81115e-01 259 2018 5 5.95160e+01 2.80687e-01 219 2018 6 5.91988e+01 1.44518e-01 91 2018 7 nan nan 0 2018 8 5.89776e+01 2.43021e-01 10 2018 9 5.54261e+01 1.42591e+00 150 2018 10 4.84079e+01 1.86128e+00 245 2018 11 4.38117e+01 1.50655e+00 606 2018 12 4.07738e+01 3.94643e-01 648 2019 1 4.21879e+01 1.25809e+00 457 2019 2 4.77181e+01 1.60100e+00 361 2019 3 5.56371e+01 1.18848e+00 226 2019 4 5.90526e+01 7.74597e-01 220 2019 5 5.93983e+01 3.24967e-02 59 2019 6 5.93817e+01 2.31241e-01 183 2019 7 5.90523e+01 2.06997e-01 151 2019 8 5.82226e+01 5.53115e-01 131 2019 9 5.57869e+01 1.15414e+00 106 2019 10 4.95497e+01 1.84093e+00 267 2019 11 4.37106e+01 1.45018e+00 604 2019 12 4.06455e+01 3.86974e-01 443 2020 1 4.25482e+01 1.22208e+00 343 2020 2 4.83196e+01 1.85315e+00 281 2020 3 5.42261e+01 2.22713e+00 199 2020 4 5.88297e+01 8.48187e-01 417 2020 5 5.92607e+01 2.36627e-01 183 2020 6 5.91369e+01 1.45698e-01 131 2020 7 5.91657e+01 1.82119e-01 47 2020 8 5.92559e+01 2.74133e-02 111 2020 9 5.44126e+01 8.01489e-01 70 2020 10 4.95317e+01 1.99406e-01 77 2020 11 4.27648e+01 1.23039e+00 123 2020 12 4.06008e+01 3.73319e-01 573 2021 1 4.26986e+01 1.23835e+00 785 2021 2 4.95116e+01 1.83014e+00 245 2021 3 5.46370e+01 1.85913e+00 391 2021 4 5.88758e+01 6.21463e-01 203 2021 5 5.95033e+01 2.86035e-01 161 2021 6 5.91318e+01 1.09628e-01 25 2021 7 5.91229e+01 1.56018e-01 67 2021 8 5.88951e+01 4.58615e-01 196 2021 9 5.45429e+01 9.82932e-01 145 2021 10 4.96157e+01 2.24720e+00 325 2021 11 4.37470e+01 1.57234e+00 391 2021 12 4.05238e+01 3.48097e-01 565 2022 1 4.30381e+01 1.29183e+00 605 2022 2 4.82933e+01 1.73742e+00 317 2022 3 5.32947e+01 1.30856e+00 108 2022 4 5.96036e+01 1.97542e-01 101 2022 5 5.92174e+01 7.86324e-02 121 2022 6 5.93057e+01 2.32395e-01 176 2022 7 5.90973e+01 1.76378e-01 98 2022 8 5.80740e+01 0.00000e+00 3 2022 9 5.74604e+01 5.98744e-03 5 2022 10 5.09982e+01 1.15088e+00 182 2022 11 4.33591e+01 1.22616e+00 512 2022 12 4.05283e+01 3.11442e-01 666 2023 1 4.24508e+01 1.18485e+00 861 2023 2 4.93279e+01 1.98447e+00 552 2023 3 5.49424e+01 2.04479e+00 400 2023 4 5.91714e+01 7.87469e-01 340 2023 5 5.95589e+01 3.62723e-01 347 2023 6 5.92021e+01 1.48943e-01 225 2023 7 5.89060e+01 0.00000e+00 2 2023 8 5.83866e+01 6.73657e-01 118 2023 9 5.62491e+01 1.33169e+00 231 2023 10 5.06193e+01 5.28260e-01 191 2023 11 4.36593e+01 1.54180e+00 626 2023 12 4.08095e+01 4.28596e-01 538 2024 1 4.26780e+01 1.24524e+00 600 2024 2 4.94279e+01 1.51134e+00 458 2024 3 5.47829e+01 1.65309e+00 387 2024 4 5.78964e+01 3.23854e-03 56