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 6.21433e+01 5.75263e-01 121 2002 8 5.70516e+01 1.54514e+00 128 2002 9 4.88767e+01 1.38207e+00 96 2002 10 4.35015e+01 2.17449e+00 144 2002 11 3.31487e+01 2.05555e+00 190 2002 12 2.91746e+01 4.91051e-01 176 2003 1 3.11254e+01 1.57175e+00 224 2003 2 3.80945e+01 2.18455e+00 160 2003 3 5.08129e+01 1.94989e+00 128 2003 4 5.72591e+01 2.13129e+00 120 2003 5 6.25858e+01 8.80436e-01 80 2003 6 6.30320e+01 1.64843e-01 50 2003 7 6.23800e+01 5.94453e-01 95 2003 8 5.68167e+01 1.19609e+00 126 2003 9 5.15728e+01 2.39259e+00 202 2003 10 4.15530e+01 2.55729e+00 183 2003 11 3.36396e+01 2.04432e+00 269 2003 12 2.92228e+01 4.76958e-01 232 2004 1 3.14840e+01 1.50958e+00 139 2004 2 4.05407e+01 2.09016e+00 80 2004 3 4.95484e+01 2.46844e+00 256 2004 4 5.69351e+01 2.11859e+00 160 2004 5 6.20222e+01 9.58271e-01 160 2004 6 6.31520e+01 1.54539e-01 48 2004 7 6.23887e+01 6.72853e-01 96 2004 8 5.88612e+01 1.26359e+00 80 2004 9 5.04622e+01 2.60636e+00 192 2004 10 4.21118e+01 3.03994e+00 128 2004 11 3.36026e+01 2.06553e+00 147 2004 12 2.89831e+01 4.25387e-01 142 2005 1 3.17598e+01 1.71088e+00 167 2005 2 3.82795e+01 1.38127e+00 96 2005 3 4.72421e+01 1.91784e+00 144 2005 4 5.74633e+01 1.52388e+00 112 2005 5 6.18650e+01 8.22528e-01 128 2005 6 6.32648e+01 1.20136e-01 115 2005 7 6.18227e+01 6.40843e-01 134 2005 8 5.68639e+01 1.45063e+00 80 2005 9 5.14918e+01 2.29088e+00 132 2005 10 4.14133e+01 2.33302e+00 304 2005 11 3.32517e+01 1.98382e+00 208 2005 12 2.91418e+01 6.26491e-01 144 2006 1 3.20994e+01 1.92398e+00 160 2006 2 3.97279e+01 3.05281e+00 144 2006 3 4.92686e+01 2.96251e+00 225 2006 4 5.72646e+01 1.88371e+00 192 2006 5 6.22440e+01 6.72421e-01 176 2006 6 6.31253e+01 1.39967e-01 136 2006 7 6.22573e+01 4.14692e-01 63 2006 8 5.80277e+01 1.55023e+00 96 2006 9 5.08916e+01 2.78742e+00 176 2006 10 4.27796e+01 2.71711e+00 260 2006 11 3.38784e+01 2.11156e+00 240 2006 12 2.93560e+01 5.88580e-01 176 2007 1 3.14615e+01 1.78993e+00 96 2007 2 3.93573e+01 2.00852e+00 128 2007 3 4.88167e+01 2.60140e+00 208 2007 4 5.80098e+01 1.66597e+00 129 2007 5 6.12234e+01 6.86437e-01 96 2007 6 6.32371e+01 2.40195e-01 80 2007 7 6.23396e+01 2.04598e-01 64 2007 8 5.74932e+01 1.49450e+00 128 2007 9 5.06411e+01 2.45426e+00 129 2007 10 4.23204e+01 2.88933e+00 255 2007 11 3.40372e+01 2.05464e+00 224 2007 12 2.92046e+01 3.32954e-01 153 2008 1 3.13633e+01 2.13493e+00 96 2008 2 3.96545e+01 2.88929e+00 192 2008 3 4.95663e+01 2.90581e+00 172 2008 4 5.86163e+01 1.13002e+00 144 2008 5 6.21563e+01 9.79994e-01 122 2008 6 6.32732e+01 2.01900e-01 152 2008 7 6.21636e+01 7.04431e-01 60 2008 8 5.71827e+01 2.14308e+00 128 2008 9 5.05940e+01 2.68377e+00 176 2008 10 4.07959e+01 2.81354e+00 208 2008 11 3.34633e+01 1.98526e+00 272 2008 12 2.93750e+01 5.74511e-01 117 2009 1 3.23443e+01 1.71506e+00 192 2009 2 3.74324e+01 1.88784e+00 96 2009 3 4.79444e+01 2.55109e+00 143 2009 4 5.76317e+01 2.00051e+00 112 2009 5 6.23833e+01 7.94730e-01 71 2009 6 6.32054e+01 1.75937e-01 96 2009 7 6.18605e+01 6.37636e-01 80 2009 8 5.82527e+01 1.33768e+00 96 2009 9 4.91534e+01 2.47607e+00 112 2009 10 4.24343e+01 2.22029e+00 192 2009 11 3.40659e+01 1.99652e+00 224 2009 12 2.91592e+01 3.98168e-01 63 2010 1 3.07958e+01 1.41797e+00 159 2010 2 3.97789e+01 2.03176e+00 176 2010 3 4.87446e+01 2.86689e+00 161 2010 4 5.72717e+01 1.87047e+00 192 2010 5 6.22017e+01 9.05229e-01 144 2010 6 6.31248e+01 9.45737e-02 143 2010 7 6.21767e+01 7.96121e-01 112 2010 8 5.76617e+01 1.38484e+00 38 2010 9 5.04393e+01 2.49113e+00 201 2010 10 4.23910e+01 2.57882e+00 345 2010 11 3.42090e+01 1.67990e+00 144 2010 12 2.93605e+01 5.49190e-01 224 2011 1 3.12492e+01 1.62149e+00 210 2011 2 4.06519e+01 1.76780e+00 176 2011 3 4.90832e+01 2.15564e+00 176 2011 4 5.72967e+01 1.98567e+00 131 2011 5 6.21219e+01 8.56732e-01 250 2011 6 6.32212e+01 1.46770e-01 111 2011 7 6.18515e+01 8.14447e-01 109 2011 8 5.71338e+01 1.45443e+00 144 2011 9 5.07856e+01 2.67306e+00 160 2011 10 4.24431e+01 2.79655e+00 287 2011 11 3.40053e+01 2.21565e+00 176 2011 12 2.93346e+01 6.40302e-01 136 2012 1 3.11279e+01 1.70429e+00 208 2012 2 4.01586e+01 2.59588e+00 54 2012 3 4.97028e+01 2.34369e+00 176 2012 4 5.72425e+01 2.10964e+00 179 2012 5 6.17759e+01 9.01664e-01 112 2012 6 6.32796e+01 1.40717e-01 128 2012 7 6.16389e+01 5.53911e-01 80 2012 8 5.69035e+01 6.85358e-01 80 2012 9 5.08214e+01 2.23190e+00 160 2012 10 4.12011e+01 2.39613e+00 293 2012 11 3.36887e+01 2.08466e+00 287 2012 12 2.92599e+01 4.51651e-01 140 2013 1 3.25836e+01 1.72820e+00 89 2013 2 3.80205e+01 1.93284e+00 128 2013 3 4.99110e+01 2.79174e+00 160 2013 4 5.66602e+01 1.95498e+00 64 2013 5 6.21082e+01 8.06394e-01 172 2013 6 6.32213e+01 1.88907e-01 109 2013 7 6.20860e+01 5.65775e-01 128 2013 8 5.68924e+01 1.28179e+00 107 2013 9 5.07248e+01 2.39182e+00 208 2013 10 4.27583e+01 2.42984e+00 240 2013 11 3.32537e+01 2.47761e+00 128 2013 12 2.90839e+01 4.71975e-01 118 2014 1 3.10323e+01 9.34295e-01 128 2014 2 3.98794e+01 2.05846e+00 154 2014 3 4.96594e+01 2.81905e+00 144 2014 4 5.69249e+01 1.79644e+00 96 2014 5 6.19627e+01 7.80991e-01 160 2014 6 6.32242e+01 1.67545e-01 96 2014 7 6.21437e+01 8.58478e-01 139 2014 8 5.72312e+01 1.13372e+00 128 2014 9 5.15837e+01 1.96150e+00 144 2014 10 4.14544e+01 2.75428e+00 320 2014 11 3.35274e+01 2.28146e+00 224 2014 12 2.92385e+01 4.65686e-01 144 2015 1 3.25356e+01 1.62461e+00 160 2015 2 3.83289e+01 1.72826e+00 192 2015 3 4.97979e+01 2.24231e+00 101 2015 4 5.54506e+01 2.15954e+00 48 2015 5 6.17132e+01 1.01461e+00 192 2015 6 6.31454e+01 1.54928e-01 128 2015 7 6.18902e+01 7.73465e-01 128 2015 8 5.70947e+01 1.82787e+00 163 2015 9 5.07504e+01 2.63659e+00 144 2015 10 4.23959e+01 1.85258e+00 192 2015 11 3.30177e+01 1.99357e+00 192 2015 12 2.94028e+01 4.06638e-01 96 2016 1 3.17411e+01 1.72997e+00 160 2016 2 3.93458e+01 2.38977e+00 240 2016 3 4.83781e+01 2.81996e+00 140 2016 4 5.71366e+01 2.04761e+00 160 2016 5 6.21400e+01 9.26557e-01 160 2016 6 6.32528e+01 1.01949e-01 149 2016 7 6.22087e+01 6.84692e-01 128 2016 8 5.70225e+01 1.05826e+00 108 2016 9 4.99424e+01 2.55111e+00 226 2016 10 4.16484e+01 2.77396e+00 288 2016 11 3.34236e+01 1.90900e+00 234 2016 12 2.93361e+01 5.84511e-01 176 2017 1 3.20465e+01 1.86256e+00 204 2017 2 3.96428e+01 2.49083e+00 240 2017 3 4.97983e+01 2.50187e+00 164 2017 4 5.66834e+01 1.69366e+00 177 2017 5 6.20066e+01 8.27941e-01 144 2017 6 6.30904e+01 2.18526e-01 64 2017 7 6.19120e+01 8.39335e-01 141 2017 8 5.82098e+01 8.12951e-01 104 2017 9 5.01801e+01 2.63705e+00 192 2017 10 4.14433e+01 2.50498e+00 233 2017 11 3.36239e+01 1.89229e+00 256 2017 12 2.91490e+01 3.44679e-01 144 2018 1 3.17379e+01 1.69433e+00 220 2018 2 3.94502e+01 2.33645e+00 96 2018 3 4.79014e+01 2.89396e+00 192 2018 4 5.72837e+01 1.85393e+00 213 2018 5 6.14125e+01 6.08831e-01 96 2018 6 6.30946e+01 9.11370e-02 88 2018 7 6.20740e+01 6.41117e-01 80 2018 8 5.72194e+01 1.60066e+00 96 2018 9 5.10207e+01 2.17655e+00 168 2018 10 4.22506e+01 2.94491e+00 288 2018 11 3.34660e+01 1.77476e+00 96 2018 12 2.91087e+01 4.71590e-01 128 2019 1 3.11754e+01 1.63465e+00 176 2019 2 4.03770e+01 2.62094e+00 63 2019 3 5.03024e+01 2.79259e+00 176 2019 4 5.86342e+01 9.12774e-01 108 2019 5 6.20251e+01 9.99468e-01 219 2019 6 6.33661e+01 2.17884e-01 91 2019 7 6.20307e+01 8.05390e-01 127 2019 8 5.80081e+01 1.66749e+00 128 2019 9 5.06572e+01 2.59047e+00 313 2019 10 4.26804e+01 2.82922e+00 176 2019 11 3.38405e+01 2.19416e+00 184 2019 12 2.93476e+01 6.28546e-01 144 2020 1 3.17507e+01 1.83510e+00 118 2020 2 3.97793e+01 3.37593e+00 144 2020 3 5.02374e+01 2.60023e+00 99 2020 4 5.74296e+01 2.20180e+00 128 2020 5 6.16720e+01 8.35870e-01 169 2020 6 6.33659e+01 1.16331e-01 92 2020 7 6.21019e+01 4.78694e-01 64 2020 8 5.95930e+01 5.69711e-01 80 2020 9 5.12114e+01 2.83070e+00 96 2020 10 4.15873e+01 2.34582e+00 223 2020 11 3.39613e+01 1.70866e+00 228 2020 12 2.92102e+01 4.95024e-01 209 2021 1 3.14343e+01 1.82454e+00 144 2021 2 4.06307e+01 2.26459e+00 96 2021 3 4.79311e+01 1.82882e+00 116 2021 4 5.67298e+01 2.30471e+00 191 2021 5 6.20939e+01 9.78724e-01 149 2021 6 6.30993e+01 1.68698e-01 47 2021 7 6.14508e+01 4.90630e-01 135 2021 8 5.81524e+01 1.39221e+00 168 2021 9 5.11237e+01 2.71884e+00 128 2021 10 4.16905e+01 2.76838e+00 108 2021 11 3.31995e+01 1.83015e+00 238 2021 12 2.91876e+01 5.51256e-01 153 2022 1 3.24333e+01 1.82965e+00 160 2022 2 3.97368e+01 2.38099e+00 208 2022 3 4.82523e+01 2.93845e+00 208 2022 4 5.90645e+01 7.38846e-01 94 2022 5 6.19042e+01 8.45399e-01 160 2022 6 6.31963e+01 1.92904e-01 159 2022 7 6.21506e+01 7.41455e-01 128 2022 8 5.70157e+01 2.08659e+00 132 2022 9 4.98727e+01 2.11393e+00 231 2022 10 4.23118e+01 2.65499e+00 275 2022 11 3.43548e+01 1.89180e+00 171 2022 12 2.90644e+01 5.22473e-01 127 2023 1 3.12539e+01 1.72033e+00 208 2023 2 3.91964e+01 2.49364e+00 144 2023 3 4.85292e+01 2.11983e+00 80 2023 4 5.82909e+01 3.44436e-01 66 2023 5 6.18156e+01 1.02023e+00 143 2023 6 6.32803e+01 1.79305e-01 73 2023 7 6.20366e+01 8.84446e-01 136 2023 8 5.82505e+01 1.32026e+00 160 2023 9 5.12755e+01 2.02202e+00 144 2023 10 4.17421e+01 2.75839e+00 267 2023 11 3.38680e+01 2.13810e+00 195 2023 12 2.89351e+01 3.63319e-01 108 2024 1 3.18915e+01 1.84900e+00 96 2024 2 4.05595e+01 2.57790e+00 112 2024 3 5.14874e+01 1.99234e+00 96 2024 4 5.46270e+01 3.72271e-01 32