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 6.10612e+01 5.29313e-01 76 2002 8 5.77503e+01 1.07095e+00 251 2002 9 5.21895e+01 1.51382e+00 241 2002 10 4.53603e+01 2.47253e+00 421 2002 11 3.96775e+01 1.21711e+00 91 2002 12 3.32305e+01 4.53970e-01 124 2003 1 3.50761e+01 1.40278e+00 50 2003 2 4.29026e+01 1.93020e+00 123 2003 3 5.21399e+01 2.22378e+00 260 2003 4 5.65329e+01 1.53371e+00 182 2003 5 6.11591e+01 5.95179e-01 268 2003 6 6.25388e+01 2.64840e-01 61 2003 7 6.06001e+01 6.68364e-01 117 2003 8 5.85584e+01 5.69592e-01 60 2003 9 5.30068e+01 1.47703e+00 269 2003 10 4.45332e+01 1.98590e+00 510 2003 11 3.56831e+01 1.17245e+00 179 2003 12 3.35879e+01 5.41222e-01 28 2004 1 3.56020e+01 1.70659e+00 22 2004 2 4.30440e+01 2.47247e+00 118 2004 3 4.97655e+01 3.09070e+00 183 2004 4 5.65582e+01 1.21642e+00 168 2004 5 6.10049e+01 9.53810e-01 147 2004 6 6.23181e+01 5.97370e-01 449 2004 7 6.14056e+01 5.75889e-01 322 2004 8 5.78887e+01 1.39392e+00 160 2004 9 5.13559e+01 1.86084e+00 195 2004 10 4.47751e+01 2.48109e+00 407 2004 11 3.75501e+01 1.29227e+00 47 2004 12 3.33687e+01 1.66890e-01 41 2005 1 3.58602e+01 1.42967e+00 37 2005 2 4.30414e+01 1.43782e+00 59 2005 3 4.91828e+01 1.62461e+00 115 2005 4 5.86923e+01 1.28180e+00 79 2005 5 6.15627e+01 7.94015e-01 290 2005 6 6.25080e+01 2.78412e-01 20 2005 7 6.06236e+01 8.39008e-01 229 2005 8 5.90627e+01 5.02463e-01 109 2005 9 5.21403e+01 1.64713e+00 363 2005 10 4.69097e+01 6.52328e-01 162 2005 11 3.80453e+01 1.66939e+00 286 2005 12 3.32123e+01 2.35957e-01 502 2006 1 3.41387e+01 1.03477e+00 239 2006 2 4.28072e+01 1.55186e+00 76 2006 3 5.10823e+01 2.11369e+00 271 2006 4 5.70281e+01 1.86573e+00 270 2006 5 6.07548e+01 6.21850e-01 122 2006 6 6.26610e+01 3.17328e-01 205 2006 7 6.02761e+01 1.09144e+00 40 2006 8 5.73246e+01 1.45350e+00 111 2006 9 5.28221e+01 1.89518e+00 301 2006 10 4.60731e+01 1.68751e+00 209 2006 11 3.64171e+01 1.30743e+00 109 2006 12 3.33725e+01 5.42539e-01 34 2007 1 3.50319e+01 1.57369e+00 104 2007 2 4.35570e+01 1.24806e+00 43 2007 3 4.81663e+01 1.75774e+00 157 2007 4 5.65969e+01 1.40779e+00 234 2007 5 6.06098e+01 4.98929e-01 83 2007 6 6.24379e+01 4.25999e-01 247 2007 7 6.07579e+01 6.95754e-01 161 2007 8 5.80311e+01 1.19065e+00 203 2007 9 5.10343e+01 1.07372e+00 84 2007 10 4.37415e+01 1.29855e+00 52 2007 11 3.81455e+01 1.79711e+00 257 2007 12 3.33480e+01 4.57307e-01 96 2008 1 3.40212e+01 1.32423e+00 36 2008 2 4.35890e+01 3.00524e+00 44 2008 3 5.12604e+01 3.01874e+00 63 2008 4 5.77025e+01 1.76896e+00 62 2008 5 6.12885e+01 6.85906e-01 161 2008 6 6.23584e+01 5.05934e-01 65 2008 7 6.04893e+01 7.07644e-01 264 2008 8 5.89334e+01 1.08277e+00 344 2008 9 5.29905e+01 7.24150e-01 143 2008 10 4.73258e+01 2.12554e+00 298 2008 11 3.64315e+01 2.55406e+00 123 2008 12 3.33230e+01 4.84350e-01 55 2009 1 3.59063e+01 2.19792e+00 95 2009 2 4.41448e+01 2.26880e+00 102 2009 3 4.97005e+01 1.36988e+00 123 2009 4 5.68526e+01 1.95383e+00 210 2009 5 6.12265e+01 8.39357e-01 233 2009 6 6.23115e+01 5.56196e-01 170 2009 7 6.11226e+01 2.96677e-01 53 2009 8 5.74545e+01 1.59321e+00 162 2009 9 5.24565e+01 1.00660e+00 167 2009 10 4.64221e+01 2.44415e+00 306 2009 11 3.81502e+01 2.39070e+00 96 2009 12 3.31108e+01 1.07079e-01 76 2010 1 3.50229e+01 1.50708e+00 51 2010 2 4.38211e+01 1.21874e+00 14 2010 3 5.23610e+01 2.05312e+00 264 2010 4 5.73918e+01 1.99669e+00 233 2010 5 6.17562e+01 6.95927e-01 138 2010 6 6.25324e+01 3.52274e-01 228 2010 7 6.03082e+01 5.87227e-01 81 2010 8 5.81891e+01 1.30219e+00 100 2010 9 5.38363e+01 3.54781e-01 26 2010 10 4.71904e+01 2.51255e+00 345 2010 11 3.72838e+01 1.29728e+00 202 2010 12 3.29913e+01 8.78727e-01 131 2011 1 3.83424e+01 1.02688e+00 84 2011 2 4.31036e+01 1.71814e+00 134 2011 3 5.07843e+01 2.46343e+00 154 2011 4 5.60500e+01 1.74335e+00 235 2011 5 6.14440e+01 9.28709e-01 403 2011 6 6.24473e+01 4.14175e-01 103 2011 7 6.09069e+01 7.79599e-01 247 2011 8 5.99157e+01 3.50649e-01 32 2011 9 5.31893e+01 1.53901e+00 253 2011 10 4.67292e+01 1.43897e+00 178 2011 11 3.87139e+01 1.71335e+00 193 2011 12 3.37321e+01 7.98560e-01 76 2012 1 3.54468e+01 1.15285e+00 50 2012 2 4.44233e+01 1.44206e+00 189 2012 3 5.26814e+01 1.87573e+00 94 2012 4 5.56377e+01 1.53395e+00 106 2012 5 6.13385e+01 7.51029e-01 143 2012 6 6.27050e+01 3.97545e-01 156 2012 7 6.06956e+01 1.30849e+00 302 2012 8 5.89427e+01 8.65941e-01 219 2012 9 5.25754e+01 2.57642e+00 425 2012 10 4.47035e+01 1.86954e+00 184 2012 11 3.74902e+01 1.89849e+00 160 2012 12 3.34603e+01 4.25268e-01 66 2013 1 3.58470e+01 1.15472e+00 120 2013 2 4.23967e+01 2.49339e+00 168 2013 3 5.19276e+01 1.97988e+00 105 2013 4 5.71769e+01 1.26566e+00 160 2013 5 6.11309e+01 7.42882e-01 303 2013 6 6.25904e+01 5.97542e-01 52 2013 7 6.05845e+01 9.31388e-01 146 2013 8 5.81763e+01 1.37492e+00 232 2013 9 5.29038e+01 1.43817e+00 164 2013 10 4.58370e+01 2.29698e+00 298 2013 11 3.80113e+01 2.57040e+00 95 2013 12 3.33988e+01 3.75580e-01 38 2014 1 3.60814e+01 8.31760e-01 131 2014 2 4.21272e+01 1.47827e+00 217 2014 3 4.94577e+01 1.81996e+00 165 2014 4 5.72912e+01 1.96026e+00 219 2014 5 6.07114e+01 7.39615e-01 179 2014 6 6.23759e+01 4.43804e-01 108 2014 7 6.05985e+01 7.39640e-01 156 2014 8 5.83318e+01 1.03263e+00 304 2014 9 5.27406e+01 2.62823e+00 135 2014 10 4.53603e+01 3.07316e+00 412 2014 11 3.84165e+01 2.09346e+00 99 2014 12 3.32025e+01 4.64586e-01 127 2015 1 3.57366e+01 2.10476e+00 59 2015 2 4.28913e+01 2.19219e+00 115 2015 3 5.06759e+01 2.28940e+00 156 2015 4 5.74221e+01 1.13142e+00 105 2015 5 6.13225e+01 8.71917e-01 175 2015 6 6.23098e+01 6.80897e-01 98 2015 7 6.11405e+01 6.17085e-01 154 2015 8 5.92974e+01 1.91815e-01 138 2015 9 5.42570e+01 1.42915e+00 100 2015 10 4.53021e+01 2.29325e+00 105 2015 11 3.85173e+01 1.82157e+00 296 2015 12 3.28200e+01 3.45552e-01 32 2016 1 3.51633e+01 1.21364e+00 3 2016 2 4.34796e+01 2.00382e+00 125 2016 3 4.81557e+01 2.68023e-01 33 2016 4 5.66074e+01 1.43601e+00 141 2016 5 6.16178e+01 3.08279e-01 201 2016 6 6.25370e+01 2.17920e-01 269 2016 7 6.09969e+01 6.53340e-01 236 2016 8 5.77930e+01 6.50633e-01 171 2016 9 5.22704e+01 1.68050e+00 172 2016 10 4.46548e+01 1.68724e+00 58 2016 11 3.75519e+01 7.62540e-01 101 2016 12 3.31071e+01 1.59378e-01 87 2017 1 3.65394e+01 1.73943e+00 103 2017 2 4.20388e+01 1.64394e+00 109 2017 3 5.06137e+01 2.26964e+00 156 2017 4 5.80971e+01 8.86212e-01 92 2017 5 6.16035e+01 6.52792e-01 266 2017 6 6.26860e+01 4.05944e-01 60 2017 7 6.11255e+01 7.77279e-01 292 2017 8 5.78952e+01 1.26422e+00 207 2017 9 5.27882e+01 1.71555e+00 293 2017 10 4.57639e+01 2.54636e+00 244 2017 11 3.75550e+01 1.96230e+00 433 2017 12 3.31011e+01 5.52605e-01 307 2018 1 3.43589e+01 1.32288e+00 73 2018 2 4.44211e+01 1.79410e+00 218 2018 3 4.99277e+01 2.75657e+00 314 2018 4 5.60501e+01 1.30373e+00 91 2018 5 6.10710e+01 2.21719e-01 58 2018 6 6.20167e+01 6.23428e-01 119 2018 7 6.18207e+01 6.14465e-01 125 2018 8 5.84995e+01 1.38048e+00 143 2018 9 5.23187e+01 1.89008e+00 287 2018 10 4.45900e+01 3.19574e+00 163 2018 11 3.76293e+01 1.31106e+00 154 2018 12 3.30392e+01 5.51054e-01 37 2019 1 3.46368e+01 5.12512e-01 54 2019 2 4.32303e+01 2.16404e+00 138 2019 3 5.18703e+01 2.62770e+00 136 2019 4 5.73110e+01 1.32357e+00 131 2019 5 6.09735e+01 1.46601e+00 174 2019 6 6.24414e+01 5.08529e-01 314 2019 7 6.04074e+01 4.61343e-01 103 2019 8 5.80762e+01 1.15903e+00 133 2019 9 5.31863e+01 1.50303e+00 75 2019 10 4.43892e+01 2.59031e+00 135 2019 11 3.72802e+01 2.07221e+00 164 2019 12 3.32742e+01 6.87051e-01 44 2020 1 3.55755e+01 1.60393e+00 201 2020 2 4.27042e+01 2.79338e+00 63 2020 3 5.22771e+01 1.85544e+00 108 2020 4 5.72670e+01 1.28462e+00 183 2020 5 6.17450e+01 6.99016e-01 158 2020 6 6.25192e+01 3.38231e-01 170 2020 7 6.17696e+01 8.74978e-01 280 2020 8 5.83074e+01 1.53772e+00 214 2020 9 5.17839e+01 1.07950e+00 200 2020 10 4.50357e+01 2.65974e+00 341 2020 11 3.63660e+01 9.66986e-01 105 2020 12 3.31181e+01 1.85095e-01 191 2021 1 3.64757e+01 1.68452e+00 165 2021 2 4.33206e+01 2.40086e+00 114 2021 3 5.03192e+01 3.30961e+00 175 2021 4 5.72881e+01 1.59060e+00 161 2021 5 6.09314e+01 1.07184e+00 134 2021 6 6.27018e+01 1.14400e-01 74 2021 7 6.08647e+01 1.09169e+00 136 2021 8 5.79342e+01 1.69076e+00 244 2021 9 5.16536e+01 1.71128e+00 162 2021 10 4.53248e+01 2.34490e+00 243 2021 11 3.69429e+01 2.13145e+00 264 2021 12 3.32983e+01 2.57864e-01 258 2022 1 3.45545e+01 1.36219e+00 74 2022 2 4.43796e+01 3.24875e+00 134 2022 3 5.06163e+01 1.54669e+00 45 2022 4 5.85956e+01 7.73752e-01 86 2022 5 6.08375e+01 1.05532e+00 291 2022 6 6.26027e+01 2.16755e-01 335 2022 7 6.12625e+01 1.00455e+00 186 2022 8 5.84862e+01 1.09712e+00 108 2022 9 5.29124e+01 1.47279e+00 345 2022 10 4.41572e+01 2.23143e+00 208 2022 11 3.59344e+01 1.48077e+00 187 2022 12 3.28912e+01 5.31346e-01 146 2023 1 3.51316e+01 1.42261e+00 172 2023 2 4.40234e+01 1.46098e+00 91 2023 3 5.02796e+01 2.75222e+00 158 2023 4 5.66752e+01 1.86141e+00 192 2023 5 6.07775e+01 5.66711e-01 161 2023 6 6.27078e+01 1.22821e-01 202 2023 7 6.13662e+01 5.01935e-01 148 2023 8 5.82954e+01 1.44947e+00 158 2023 9 5.36268e+01 1.56046e+00 181 2023 10 4.59672e+01 3.19876e+00 149 2023 11 3.61347e+01 1.85453e+00 140 2023 12 3.32949e+01 8.06827e-01 95 2024 1 3.68673e+01 1.72806e+00 197 2024 2 4.43621e+01 2.20181e+00 80 2024 3 5.04648e+01 2.17784e+00 202 2024 4 5.55489e+01 1.03002e-01 19