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 5.90191e+01 8.08013e-02 199 2002 8 5.86378e+01 3.67548e-01 252 2002 9 5.64776e+01 7.92922e-01 252 2002 10 5.03746e+01 1.46205e+00 585 2002 11 4.41639e+01 1.65469e+00 1160 2002 12 4.06350e+01 3.98721e-01 788 2003 1 4.25080e+01 1.38387e+00 766 2003 2 4.82870e+01 1.86249e+00 636 2003 3 5.43373e+01 1.70213e+00 677 2003 4 5.83231e+01 1.04596e+00 128 2003 5 5.92908e+01 1.60357e-01 293 2003 6 5.93801e+01 1.53721e-02 64 2003 7 5.88878e+01 1.10154e-02 64 2003 8 5.87977e+01 2.93565e-01 135 2003 9 5.56033e+01 1.05500e+00 285 2003 10 4.99712e+01 1.87805e+00 509 2003 11 4.33778e+01 1.68948e+00 478 2003 12 4.05275e+01 3.57591e-01 717 2004 1 4.23927e+01 1.13898e+00 812 2004 2 4.79246e+01 2.03040e+00 814 2004 3 5.51712e+01 1.68279e+00 552 2004 4 5.88323e+01 6.97821e-01 525 2004 5 5.99190e+01 1.27776e-02 60 2004 6 5.91245e+01 3.31985e-01 247 2004 7 5.87994e+01 1.42559e-01 262 2004 8 5.83855e+01 6.26334e-01 316 2004 9 5.43962e+01 3.06739e-01 146 2004 10 4.96453e+01 1.08623e+00 184 2004 11 4.37917e+01 1.65790e+00 682 2004 12 4.05484e+01 3.73454e-01 769 2005 1 4.18781e+01 1.31481e+00 786 2005 2 4.81663e+01 1.84235e+00 593 2005 3 5.45592e+01 1.38970e+00 734 2005 4 5.87742e+01 8.50445e-01 504 2005 5 5.95426e+01 2.67220e-01 224 2005 6 nan nan 0 2005 7 5.86846e+01 2.44643e-01 128 2005 8 5.77529e+01 4.59836e-01 70 2005 9 5.50404e+01 7.41531e-01 140 2005 10 4.90029e+01 1.46944e+00 176 2005 11 4.41586e+01 1.08797e+00 307 2005 12 4.06673e+01 3.26054e-01 1018 2006 1 4.27496e+01 1.53951e+00 481 2006 2 4.90414e+01 1.66245e+00 808 2006 3 5.42190e+01 1.41844e+00 693 2006 4 5.83750e+01 7.29659e-01 378 2006 5 5.94473e+01 4.65234e-02 255 2006 6 5.89419e+01 1.83110e-01 132 2006 7 5.87491e+01 1.07923e-01 248 2006 8 5.93950e+01 3.00026e-03 2 2006 9 5.45595e+01 1.04838e+00 313 2006 10 5.09281e+01 1.92345e+00 261 2006 11 4.39550e+01 1.53813e+00 708 2006 12 4.05826e+01 3.59693e-01 1007 2007 1 4.24191e+01 1.59672e+00 992 2007 2 4.85382e+01 2.00098e+00 656 2007 3 5.46678e+01 1.88236e+00 425 2007 4 5.82544e+01 6.97656e-01 327 2007 5 5.93060e+01 1.06639e-01 128 2007 6 5.89895e+01 9.82555e-03 62 2007 7 5.88798e+01 1.61130e-01 189 2007 8 5.88172e+01 3.11439e-01 248 2007 9 5.68780e+01 1.99365e-01 192 2007 10 5.03201e+01 1.14076e+00 249 2007 11 4.33596e+01 1.36827e+00 524 2007 12 4.04981e+01 2.48442e-01 724 2008 1 4.20600e+01 1.31436e+00 1028 2008 2 4.85519e+01 1.74866e+00 776 2008 3 5.48122e+01 1.36463e+00 437 2008 4 5.89532e+01 3.28552e-01 249 2008 5 5.93924e+01 1.18627e-01 449 2008 6 5.89634e+01 5.50771e-03 64 2008 7 5.87857e+01 1.97658e-01 193 2008 8 5.89720e+01 3.54522e-01 256 2008 9 5.47837e+01 1.01970e+00 252 2008 10 4.95880e+01 1.92123e+00 469 2008 11 4.38450e+01 1.40243e+00 704 2008 12 4.05207e+01 2.08831e-01 879 2009 1 4.26909e+01 1.54058e+00 1183 2009 2 4.80620e+01 1.69842e+00 676 2009 3 5.46711e+01 1.71008e+00 428 2009 4 5.87347e+01 7.11642e-01 554 2009 5 5.93499e+01 1.64742e-01 150 2009 6 5.90238e+01 3.55832e-01 128 2009 7 5.88460e+01 9.34241e-02 359 2009 8 5.85823e+01 5.12448e-01 244 2009 9 5.51210e+01 1.33107e+00 236 2009 10 5.02360e+01 1.59433e+00 539 2009 11 4.37887e+01 1.60524e+00 883 2009 12 4.07059e+01 3.97786e-01 749 2010 1 4.27503e+01 1.37775e+00 754 2010 2 4.80794e+01 1.68470e+00 872 2010 3 5.56806e+01 1.01743e+00 441 2010 4 5.84157e+01 8.97915e-01 234 2010 5 5.95522e+01 3.14922e-01 238 2010 6 5.87823e+01 1.19162e-01 371 2010 7 5.89106e+01 2.42095e-01 116 2010 8 5.84786e+01 4.50772e-01 308 2010 9 5.58906e+01 1.09314e+00 212 2010 10 4.98441e+01 1.09114e+00 345 2010 11 4.29458e+01 9.25594e-01 416 2010 12 4.08697e+01 4.16135e-01 660 2011 1 4.31203e+01 1.27901e+00 744 2011 2 4.81608e+01 1.63570e+00 760 2011 3 5.40775e+01 1.70216e+00 728 2011 4 5.88162e+01 6.70550e-01 510 2011 5 5.93096e+01 1.00409e-01 253 2011 6 5.88133e+01 9.40324e-03 64 2011 7 5.87807e+01 1.66574e-01 147 2011 8 5.90004e+01 2.32425e-01 193 2011 9 5.54766e+01 1.66983e+00 256 2011 10 4.89068e+01 1.81346e+00 385 2011 11 4.31311e+01 1.24114e+00 629 2011 12 4.07332e+01 3.36335e-01 828 2012 1 4.21646e+01 1.25086e+00 828 2012 2 4.87455e+01 2.01343e+00 766 2012 3 5.39452e+01 1.39940e+00 505 2012 4 5.88345e+01 4.88893e-01 470 2012 5 5.92350e+01 5.61967e-02 190 2012 6 5.89534e+01 5.48746e-02 96 2012 7 5.87630e+01 7.93279e-02 248 2012 8 5.90227e+01 2.42560e-01 67 2012 9 5.61195e+01 1.24682e+00 392 2012 10 4.93753e+01 2.23633e+00 194 2012 11 4.38294e+01 1.57230e+00 919 2012 12 4.05907e+01 2.35331e-01 713 2013 1 4.25217e+01 1.78718e+00 667 2013 2 4.87720e+01 2.04790e+00 859 2013 3 5.45031e+01 1.32484e+00 525 2013 4 5.90883e+01 6.01201e-01 370 2013 5 5.93315e+01 1.28153e-01 267 2013 6 nan nan 0 2013 7 5.88291e+01 1.98484e-01 495 2013 8 5.84094e+01 6.85964e-01 190 2013 9 5.38636e+01 3.42600e-01 192 2013 10 5.07737e+01 1.14127e+00 304 2013 11 4.39159e+01 1.14827e+00 826 2013 12 4.05260e+01 3.17445e-01 822 2014 1 4.24575e+01 1.55649e+00 1088 2014 2 4.84947e+01 1.97703e+00 933 2014 3 5.50419e+01 1.38611e+00 595 2014 4 5.90122e+01 8.66004e-01 171 2014 5 5.92020e+01 1.68430e-01 192 2014 6 5.88770e+01 1.18266e-01 192 2014 7 5.87519e+01 1.68691e-01 211 2014 8 5.93662e+01 1.00418e-02 64 2014 9 5.55629e+01 1.43480e+00 274 2014 10 4.97892e+01 1.77172e+00 729 2014 11 4.35916e+01 1.43232e+00 933 2014 12 4.06164e+01 3.33191e-01 1205 2015 1 4.24680e+01 1.50998e+00 761 2015 2 4.82032e+01 1.85417e+00 837 2015 3 5.46179e+01 1.44652e+00 614 2015 4 5.85602e+01 6.83491e-01 459 2015 5 nan nan 0 2015 6 nan nan 0 2015 7 5.87305e+01 1.12948e-01 111 2015 8 5.89025e+01 2.70615e-01 434 2015 9 5.53689e+01 1.69993e+00 429 2015 10 4.88928e+01 1.62068e+00 392 2015 11 4.42018e+01 1.38589e+00 509 2015 12 4.05721e+01 3.13657e-01 1038 2016 1 4.21169e+01 1.25176e+00 869 2016 2 4.84288e+01 1.94238e+00 856 2016 3 5.50251e+01 1.51529e+00 368 2016 4 5.88179e+01 2.66355e-01 256 2016 5 5.92569e+01 2.02598e-01 180 2016 6 5.88328e+01 2.48836e-02 189 2016 7 5.89615e+01 1.22913e-01 222 2016 8 5.87106e+01 3.03148e-01 184 2016 9 5.52970e+01 1.24563e+00 452 2016 10 4.95235e+01 1.58256e+00 311 2016 11 4.41955e+01 1.83952e+00 194 2016 12 4.06686e+01 3.15138e-01 1119 2017 1 4.29668e+01 1.31999e+00 690 2017 2 4.85495e+01 1.78229e+00 796 2017 3 5.42425e+01 1.85956e+00 447 2017 4 5.82835e+01 6.97044e-01 384 2017 5 5.92738e+01 1.29832e-01 497 2017 6 5.88972e+01 8.88107e-02 317 2017 7 5.87267e+01 1.87422e-01 312 2017 8 5.87561e+01 5.56638e-01 97 2017 9 5.60815e+01 7.67877e-01 192 2017 10 4.92236e+01 2.52033e-01 91 2017 11 4.33985e+01 1.65008e+00 601 2017 12 4.05240e+01 2.99204e-01 1099 2018 1 4.27187e+01 1.41252e+00 732 2018 2 4.83243e+01 1.77488e+00 425 2018 3 5.42918e+01 2.07135e+00 441 2018 4 5.84581e+01 7.58299e-01 316 2018 5 5.94957e+01 2.15665e-01 427 2018 6 5.89855e+01 2.07710e-01 320 2018 7 5.87897e+01 1.24200e-01 128 2018 8 5.86488e+01 4.90195e-01 339 2018 9 5.57514e+01 1.35975e+00 301 2018 10 4.86671e+01 1.79054e+00 517 2018 11 4.35805e+01 1.49701e+00 884 2018 12 4.06090e+01 2.57776e-01 940 2019 1 4.22633e+01 1.57724e+00 816 2019 2 4.80413e+01 2.06491e+00 513 2019 3 5.48708e+01 1.47724e+00 641 2019 4 5.87246e+01 8.62239e-01 539 2019 5 5.93507e+01 3.86269e-02 158 2019 6 5.89783e+01 2.19213e-01 200 2019 7 5.88585e+01 2.12788e-01 310 2019 8 5.81122e+01 4.08822e-01 111 2019 9 5.54635e+01 1.13188e+00 187 2019 10 5.00668e+01 1.82403e+00 298 2019 11 4.38444e+01 1.53538e+00 1033 2019 12 4.06800e+01 3.78383e-01 703 2020 1 4.27106e+01 1.35978e+00 891 2020 2 4.82456e+01 1.80764e+00 802 2020 3 5.42372e+01 1.77952e+00 467 2020 4 5.86673e+01 7.98575e-01 831 2020 5 5.93216e+01 1.74340e-01 340 2020 6 5.89122e+01 1.28888e-01 441 2020 7 5.88038e+01 1.07741e-01 256 2020 8 5.90272e+01 3.79876e-01 199 2020 9 5.51184e+01 5.47338e-01 215 2020 10 4.89469e+01 1.12400e+00 366 2020 11 4.35822e+01 1.65054e+00 634 2020 12 4.05284e+01 3.67504e-01 810 2021 1 4.25406e+01 1.16765e+00 762 2021 2 4.91863e+01 1.95814e+00 697 2021 3 5.47293e+01 1.58911e+00 720 2021 4 5.89964e+01 6.48164e-01 498 2021 5 5.94045e+01 1.75782e-01 416 2021 6 5.85714e+01 8.41805e-02 65 2021 7 5.88159e+01 8.94466e-02 205 2021 8 5.86334e+01 4.83897e-01 272 2021 9 5.51460e+01 1.59028e+00 142 2021 10 4.98381e+01 2.04682e+00 214 2021 11 4.39254e+01 1.56150e+00 991 2021 12 4.05729e+01 3.13109e-01 937 2022 1 4.23056e+01 1.37270e+00 1130 2022 2 4.81800e+01 2.10152e+00 512 2022 3 5.41225e+01 1.56319e+00 588 2022 4 5.94021e+01 1.62990e-01 126 2022 5 5.93416e+01 1.26340e-01 349 2022 6 5.91064e+01 3.05934e-01 359 2022 7 5.87864e+01 1.95539e-02 125 2022 8 5.83577e+01 2.61036e-01 256 2022 9 5.42144e+01 1.32055e-02 42 2022 10 5.10263e+01 1.38525e+00 347 2022 11 4.33961e+01 1.22143e+00 867 2022 12 4.06381e+01 3.84464e-01 1077 2023 1 4.23727e+01 1.42544e+00 1106 2023 2 4.88531e+01 1.96118e+00 797 2023 3 5.44093e+01 1.75035e+00 633 2023 4 5.89645e+01 6.69796e-01 561 2023 5 5.94420e+01 1.93129e-01 350 2023 6 5.90651e+01 2.16002e-01 158 2023 7 5.86140e+01 7.10164e-03 51 2023 8 5.85268e+01 6.06891e-01 195 2023 9 5.57271e+01 1.32636e+00 454 2023 10 5.03829e+01 1.39806e+00 224 2023 11 4.37740e+01 1.65601e+00 721 2023 12 4.07475e+01 4.37430e-01 949 2024 1 4.21277e+01 1.11652e+00 911 2024 2 4.91981e+01 1.33793e+00 670 2024 3 5.46076e+01 1.41728e+00 571 2024 4 5.76920e+01 8.56486e-02 70