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 5.99190e+01 4.93609e-01 192 2002 8 5.88787e+01 1.31461e-01 64 2002 9 5.74803e+01 3.12228e-01 128 2002 10 4.90279e+01 1.51557e+00 289 2002 11 4.43813e+01 1.82434e+00 719 2002 12 4.03719e+01 3.02347e-01 808 2003 1 4.19051e+01 1.13625e+00 641 2003 2 4.76703e+01 1.58447e+00 287 2003 3 5.36716e+01 1.64415e+00 318 2003 4 5.88178e+01 6.45706e-01 153 2003 5 5.99526e+01 1.66577e-01 64 2003 6 5.99418e+01 3.21400e-01 83 2003 7 5.97654e+01 4.59414e-01 64 2003 8 nan nan 0 2003 9 5.57847e+01 1.50319e+00 421 2003 10 5.04919e+01 2.21682e+00 576 2003 11 4.35531e+01 1.77152e+00 496 2003 12 4.02732e+01 2.92435e-01 560 2004 1 4.25009e+01 1.41240e+00 905 2004 2 4.88744e+01 1.96458e+00 645 2004 3 5.52432e+01 2.15609e+00 384 2004 4 5.89442e+01 6.04996e-01 367 2004 5 5.99793e+01 8.96657e-02 72 2004 6 6.02869e+01 8.71382e-02 9 2004 7 5.95692e+01 6.18258e-01 26 2004 8 5.97058e+01 2.78433e-01 43 2004 9 5.43530e+01 9.99304e-01 179 2004 10 5.02480e+01 1.73206e+00 424 2004 11 4.33319e+01 1.79005e+00 704 2004 12 4.02779e+01 3.20771e-01 948 2005 1 4.20611e+01 1.23221e+00 513 2005 2 4.82580e+01 1.53517e+00 580 2005 3 5.50616e+01 1.43281e+00 576 2005 4 5.85788e+01 9.61393e-01 239 2005 5 5.99955e+01 1.48571e-01 285 2005 6 nan nan 0 2005 7 5.95470e+01 4.64153e-01 70 2005 8 5.82917e+01 2.56156e-01 101 2005 9 5.51233e+01 5.00034e-01 135 2005 10 4.73519e+01 2.17874e-01 128 2005 11 4.34322e+01 1.55040e+00 622 2005 12 4.04958e+01 3.30526e-01 863 2006 1 4.27711e+01 1.34622e+00 565 2006 2 4.90597e+01 1.88956e+00 436 2006 3 5.38963e+01 1.28340e+00 512 2006 4 5.91702e+01 8.32669e-01 512 2006 5 5.99787e+01 1.34092e-01 321 2006 6 nan nan 0 2006 7 5.98128e+01 4.67450e-01 152 2006 8 nan nan 0 2006 9 5.59998e+01 8.82052e-01 224 2006 10 5.01625e+01 1.93664e+00 385 2006 11 4.41200e+01 1.66965e+00 406 2006 12 4.01239e+01 1.19951e-01 561 2007 1 4.25345e+01 1.40859e+00 858 2007 2 4.81076e+01 1.47751e+00 804 2007 3 5.40852e+01 1.79299e+00 404 2007 4 5.86143e+01 6.49101e-01 275 2007 5 5.98272e+01 1.31812e-01 192 2007 6 6.00478e+01 2.46758e-01 141 2007 7 nan nan 0 2007 8 5.98235e+01 1.39652e-01 64 2007 9 5.60211e+01 1.36199e+00 128 2007 10 4.94191e+01 8.45114e-01 219 2007 11 4.38528e+01 1.98726e+00 402 2007 12 4.03611e+01 3.37693e-01 702 2008 1 4.26132e+01 1.52325e+00 1019 2008 2 4.79154e+01 1.38814e+00 410 2008 3 5.53937e+01 1.39795e+00 528 2008 4 5.94138e+01 3.96260e-01 309 2008 5 5.99442e+01 1.57838e-01 366 2008 6 6.00159e+01 3.23347e-01 128 2008 7 5.97111e+01 4.44220e-01 70 2008 8 5.86204e+01 9.01873e-01 210 2008 9 5.48813e+01 1.53129e+00 139 2008 10 4.99114e+01 1.85356e+00 642 2008 11 4.31465e+01 1.64113e+00 541 2008 12 4.03881e+01 3.26075e-01 921 2009 1 4.25562e+01 1.53700e+00 921 2009 2 4.90620e+01 1.66447e+00 338 2009 3 5.51253e+01 1.04077e+00 610 2009 4 5.82769e+01 5.77005e-01 198 2009 5 5.99222e+01 1.90460e-01 115 2009 6 6.00342e+01 7.46187e-02 64 2009 7 5.99788e+01 4.49231e-01 103 2009 8 5.91209e+01 5.71918e-01 198 2009 9 5.48090e+01 1.14725e+00 322 2009 10 4.93348e+01 1.30347e+00 464 2009 11 4.32179e+01 1.61943e+00 832 2009 12 4.03838e+01 3.25890e-01 861 2010 1 4.26815e+01 1.52855e+00 594 2010 2 4.79257e+01 1.43635e+00 512 2010 3 5.54810e+01 8.62791e-01 278 2010 4 5.84813e+01 7.00369e-01 190 2010 5 6.02100e+01 1.85062e-03 7 2010 6 5.97803e+01 3.28317e-01 188 2010 7 5.96752e+01 4.23029e-01 64 2010 8 5.89362e+01 6.43333e-01 252 2010 9 5.59761e+01 4.90513e-02 65 2010 10 4.98601e+01 1.04319e+00 299 2010 11 4.28562e+01 1.04117e+00 639 2010 12 4.06100e+01 3.69029e-01 660 2011 1 4.29654e+01 1.45104e+00 677 2011 2 4.89773e+01 1.52755e+00 462 2011 3 5.49110e+01 1.66423e+00 934 2011 4 5.90733e+01 3.60708e-01 320 2011 5 5.98495e+01 2.18728e-01 414 2011 6 5.99597e+01 3.14907e-01 128 2011 7 5.96780e+01 4.38481e-01 64 2011 8 5.98326e+01 2.28912e-01 85 2011 9 5.55292e+01 1.56496e+00 398 2011 10 5.01446e+01 1.92515e+00 394 2011 11 4.29530e+01 1.19282e+00 730 2011 12 4.04556e+01 3.06723e-01 944 2012 1 4.23481e+01 1.34169e+00 961 2012 2 4.81728e+01 1.61381e+00 512 2012 3 5.49359e+01 1.65734e+00 586 2012 4 5.92485e+01 3.65274e-01 387 2012 5 5.96870e+01 1.54392e-01 249 2012 6 6.00206e+01 3.16588e-01 64 2012 7 5.99798e+01 2.89458e-01 64 2012 8 5.93193e+01 4.52961e-01 64 2012 9 5.70233e+01 1.06176e+00 235 2012 10 4.90457e+01 2.52913e+00 198 2012 11 4.37671e+01 1.75183e+00 513 2012 12 4.04913e+01 3.51527e-01 739 2013 1 4.23958e+01 1.48435e+00 683 2013 2 4.84945e+01 1.55869e+00 640 2013 3 5.40540e+01 1.62826e+00 269 2013 4 5.98574e+01 1.19307e-01 65 2013 5 5.99832e+01 2.72042e-01 177 2013 6 nan nan 0 2013 7 5.96875e+01 4.74376e-01 192 2013 8 6.00098e+01 1.41456e-01 46 2013 9 5.46978e+01 9.18321e-01 314 2013 10 5.05107e+01 9.30772e-01 80 2013 11 4.33987e+01 1.37001e+00 687 2013 12 4.03807e+01 3.35612e-01 666 2014 1 4.24953e+01 1.18051e+00 654 2014 2 4.80056e+01 5.58439e-01 320 2014 3 5.48438e+01 1.47046e+00 550 2014 4 5.84956e+01 7.73574e-01 156 2014 5 5.97272e+01 1.58527e-01 128 2014 6 6.00334e+01 2.94110e-01 64 2014 7 5.95548e+01 4.62310e-01 192 2014 8 5.84544e+01 1.32688e-01 18 2014 9 5.53192e+01 9.65936e-01 287 2014 10 4.90058e+01 1.25567e+00 440 2014 11 4.25799e+01 1.18621e+00 373 2014 12 4.03933e+01 3.44993e-01 819 2015 1 4.24312e+01 1.43594e+00 835 2015 2 4.80804e+01 2.27956e+00 409 2015 3 5.43770e+01 1.93368e+00 392 2015 4 5.90465e+01 6.76065e-01 263 2015 5 6.02682e+01 3.95518e-02 64 2015 6 nan nan 0 2015 7 nan nan 0 2015 8 5.87935e+01 3.87695e-01 125 2015 9 5.48686e+01 1.64296e+00 268 2015 10 4.84743e+01 1.32544e+00 570 2015 11 4.28914e+01 5.32714e-01 322 2015 12 4.03788e+01 3.16635e-01 535 2016 1 4.17829e+01 1.03394e+00 803 2016 2 4.77121e+01 2.17591e+00 552 2016 3 5.60234e+01 6.24973e-01 257 2016 4 5.91602e+01 2.33889e-01 194 2016 5 5.97422e+01 2.93464e-01 128 2016 6 6.00462e+01 2.93993e-01 11 2016 7 nan nan 0 2016 8 5.94291e+01 5.54657e-01 74 2016 9 5.55526e+01 6.83186e-01 199 2016 10 4.90952e+01 1.58443e+00 553 2016 11 4.35491e+01 1.53225e+00 448 2016 12 4.03646e+01 2.80403e-01 936 2017 1 4.28734e+01 1.38973e+00 954 2017 2 4.89258e+01 1.74251e+00 399 2017 3 5.51302e+01 1.49844e+00 312 2017 4 5.86553e+01 5.04492e-01 245 2017 5 5.97365e+01 1.61476e-01 199 2017 6 6.00333e+01 3.02258e-01 91 2017 7 5.97593e+01 4.71020e-01 64 2017 8 5.96034e+01 4.13541e-01 220 2017 9 5.65303e+01 4.76724e-01 84 2017 10 5.02139e+01 2.44072e+00 214 2017 11 4.38294e+01 2.16283e+00 403 2017 12 4.03534e+01 3.21080e-01 706 2018 1 4.26631e+01 1.65225e+00 613 2018 2 4.87849e+01 1.91989e+00 419 2018 3 5.43863e+01 1.72412e+00 704 2018 4 5.80237e+01 2.32628e-01 266 2018 5 6.01187e+01 8.81130e-02 74 2018 6 5.99100e+01 0.00000e+00 8 2018 7 5.97877e+01 4.50912e-01 62 2018 8 nan nan 0 2018 9 5.59146e+01 1.28799e+00 254 2018 10 4.78857e+01 9.38813e-01 465 2018 11 4.29440e+01 1.48608e+00 649 2018 12 4.04397e+01 3.16637e-01 823 2019 1 4.22009e+01 1.25644e+00 719 2019 2 4.74296e+01 2.07564e+00 469 2019 3 5.56657e+01 1.07260e+00 375 2019 4 5.96214e+01 3.64146e-01 204 2019 5 5.99515e+01 9.67988e-02 104 2019 6 6.00442e+01 2.43567e-01 112 2019 7 5.94444e+01 3.51302e-01 29 2019 8 5.86790e+01 1.93345e-01 67 2019 9 5.62424e+01 8.43996e-01 227 2019 10 5.02100e+01 7.74229e-01 369 2019 11 4.37100e+01 1.62987e+00 780 2019 12 4.04791e+01 3.65156e-01 888 2020 1 4.26802e+01 1.35276e+00 923 2020 2 4.82717e+01 2.46733e+00 432 2020 3 5.44369e+01 1.88812e+00 469 2020 4 5.89496e+01 8.71911e-01 446 2020 5 5.99703e+01 1.67673e-01 290 2020 6 6.02634e+01 1.92678e-02 10 2020 7 5.98515e+01 4.45624e-01 128 2020 8 5.91424e+01 5.98359e-01 168 2020 9 5.51220e+01 1.11942e+00 462 2020 10 4.98369e+01 6.18034e-01 277 2020 11 4.30610e+01 1.29993e+00 360 2020 12 4.03195e+01 2.82193e-01 951 2021 1 4.28405e+01 1.26578e+00 733 2021 2 4.76144e+01 2.11214e+00 378 2021 3 5.44635e+01 1.21875e+00 504 2021 4 5.95025e+01 2.98602e-01 220 2021 5 6.00299e+01 1.42224e-01 264 2021 6 5.98733e+01 2.99986e-01 60 2021 7 5.95743e+01 4.63491e-01 64 2021 8 5.97336e+01 3.30145e-01 73 2021 9 5.47790e+01 1.13374e+00 335 2021 10 4.99551e+01 1.78283e+00 542 2021 11 4.36536e+01 1.59450e+00 744 2021 12 4.02992e+01 2.65470e-01 642 2022 1 4.27030e+01 1.37856e+00 859 2022 2 4.76008e+01 2.03433e+00 561 2022 3 5.31646e+01 1.43192e+00 121 2022 4 5.98790e+01 3.50466e-02 64 2022 5 5.97752e+01 1.87399e-01 121 2022 6 6.01236e+01 3.22132e-01 63 2022 7 nan nan 0 2022 8 5.85073e+01 1.35619e-01 64 2022 9 5.66983e+01 1.24199e+00 225 2022 10 5.07946e+01 1.54749e+00 311 2022 11 4.28861e+01 1.34575e+00 629 2022 12 4.04073e+01 3.24882e-01 948 2023 1 4.27827e+01 1.36286e+00 1009 2023 2 4.89657e+01 2.33531e+00 484 2023 3 5.43941e+01 1.65439e+00 591 2023 4 5.98585e+01 1.83872e-01 254 2023 5 5.99097e+01 1.04269e-01 320 2023 6 5.98776e+01 3.03879e-01 301 2023 7 nan nan 0 2023 8 5.81120e+01 1.31309e-01 64 2023 9 5.67081e+01 1.14524e+00 295 2023 10 5.13081e+01 1.19558e+00 328 2023 11 4.32235e+01 1.40006e+00 446 2023 12 4.05264e+01 4.27702e-01 842 2024 1 4.22881e+01 1.31377e+00 818 2024 2 4.88214e+01 1.76646e+00 902 2024 3 5.51195e+01 1.72942e+00 385 2024 4 5.78639e+01 4.81702e-02 128