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 6.16424e+01 7.28785e-02 29 2002 8 5.75802e+01 7.84702e-01 67 2002 9 4.89122e+01 1.97414e+00 56 2002 10 4.25940e+01 3.02424e+00 166 2002 11 3.38241e+01 2.10230e+00 207 2002 12 2.95184e+01 4.21723e-01 144 2003 1 3.06937e+01 1.50931e+00 220 2003 2 3.89321e+01 2.26115e+00 140 2003 3 5.12351e+01 2.22001e+00 85 2003 4 5.55529e+01 1.63481e+00 147 2003 5 6.23386e+01 8.64274e-01 64 2003 6 6.24240e+01 1.56015e-01 63 2003 7 6.16009e+01 6.33537e-01 49 2003 8 5.62311e+01 1.57619e-03 16 2003 9 5.01855e+01 1.48761e+00 54 2003 10 4.17202e+01 2.53139e+00 192 2003 11 3.35612e+01 1.93754e+00 187 2003 12 2.94562e+01 4.12449e-01 190 2004 1 3.16317e+01 1.39569e+00 119 2004 2 3.94563e+01 1.58642e+00 43 2004 3 4.91707e+01 2.53635e+00 152 2004 4 5.53871e+01 2.09860e+00 173 2004 5 6.20625e+01 8.34344e-01 141 2004 6 6.26505e+01 7.37538e-02 8 2004 7 6.19019e+01 5.95447e-01 56 2004 8 5.82333e+01 2.05352e+00 60 2004 9 5.03483e+01 2.19634e+00 82 2004 10 4.12988e+01 2.53742e+00 138 2004 11 3.37912e+01 2.13557e+00 137 2004 12 2.92540e+01 1.39335e-01 125 2005 1 3.14214e+01 1.66586e+00 167 2005 2 3.98058e+01 2.28224e+00 78 2005 3 4.78686e+01 2.36960e+00 175 2005 4 5.55036e+01 1.63937e+00 86 2005 5 6.11264e+01 1.64831e+00 91 2005 6 6.27675e+01 2.69477e-01 94 2005 7 6.12626e+01 7.57942e-01 72 2005 8 5.86865e+01 1.65885e-03 12 2005 9 5.00175e+01 2.71673e+00 109 2005 10 4.16294e+01 2.30365e+00 195 2005 11 3.37374e+01 1.89173e+00 183 2005 12 2.95560e+01 5.49332e-01 119 2006 1 3.16031e+01 1.97769e+00 146 2006 2 3.94640e+01 2.47283e+00 160 2006 3 4.86885e+01 2.86967e+00 170 2006 4 5.53618e+01 1.65278e+00 125 2006 5 6.18703e+01 1.20808e+00 147 2006 6 6.27468e+01 3.45078e-01 62 2006 7 6.15692e+01 1.38989e-01 48 2006 8 5.82032e+01 1.92332e+00 66 2006 9 5.05205e+01 2.50452e+00 152 2006 10 4.23723e+01 2.90652e+00 176 2006 11 3.36336e+01 2.15464e+00 235 2006 12 2.96835e+01 4.86964e-01 158 2007 1 3.14465e+01 1.52055e+00 95 2007 2 3.99143e+01 2.30535e+00 173 2007 3 4.91668e+01 2.38676e+00 204 2007 4 5.59984e+01 1.66845e+00 151 2007 5 6.10799e+01 1.33803e+00 80 2007 6 6.24932e+01 1.60151e-01 60 2007 7 6.17533e+01 5.98648e-01 80 2007 8 5.72930e+01 1.41118e+00 96 2007 9 4.97762e+01 1.54855e+00 96 2007 10 4.28182e+01 1.26238e+00 95 2007 11 3.40936e+01 1.94190e+00 230 2007 12 2.95179e+01 1.57028e-01 83 2008 1 3.04808e+01 1.93662e+00 151 2008 2 3.97332e+01 3.06402e+00 252 2008 3 4.97353e+01 2.79302e+00 148 2008 4 5.65769e+01 1.29268e+00 134 2008 5 6.17111e+01 1.39267e+00 112 2008 6 6.27547e+01 3.93859e-01 116 2008 7 6.15102e+01 9.09193e-01 32 2008 8 5.61053e+01 1.05305e+00 25 2008 9 5.01844e+01 2.37259e+00 86 2008 10 4.08211e+01 2.54554e+00 203 2008 11 3.39371e+01 1.87775e+00 232 2008 12 2.95946e+01 4.29084e-01 165 2009 1 3.13531e+01 1.51782e+00 135 2009 2 3.90928e+01 2.78277e+00 189 2009 3 4.80988e+01 2.30563e+00 135 2009 4 5.60354e+01 1.76125e+00 108 2009 5 6.15341e+01 1.48199e+00 80 2009 6 6.25822e+01 4.63513e-02 48 2009 7 6.15987e+01 6.35604e-01 63 2009 8 5.81729e+01 1.39099e+00 65 2009 9 4.96443e+01 2.35013e+00 123 2009 10 4.21903e+01 2.75796e+00 197 2009 11 3.41486e+01 1.76667e+00 183 2009 12 2.92976e+01 1.26003e-01 47 2010 1 3.05546e+01 1.42587e+00 162 2010 2 3.99890e+01 2.39626e+00 134 2010 3 4.82156e+01 3.22918e+00 160 2010 4 5.56527e+01 1.78796e+00 176 2010 5 6.20876e+01 8.42605e-01 72 2010 6 6.26215e+01 2.61668e-01 107 2010 7 6.18750e+01 8.05460e-01 44 2010 8 nan nan 0 2010 9 5.17034e+01 2.35970e+00 150 2010 10 4.24614e+01 2.66065e+00 332 2010 11 3.36838e+01 1.67211e+00 184 2010 12 2.96974e+01 4.51193e-01 190 2011 1 3.09201e+01 1.64377e+00 168 2011 2 4.03553e+01 1.91132e+00 224 2011 3 4.90198e+01 2.40650e+00 163 2011 4 5.47799e+01 1.41425e+00 132 2011 5 6.20043e+01 1.27359e+00 120 2011 6 6.27832e+01 2.95923e-01 108 2011 7 6.20459e+01 3.36709e-01 31 2011 8 5.73091e+01 1.44427e+00 134 2011 9 5.07825e+01 2.54290e+00 194 2011 10 4.23531e+01 2.66086e+00 259 2011 11 3.40481e+01 2.00893e+00 224 2011 12 2.94968e+01 4.67040e-01 174 2012 1 3.05147e+01 1.68540e+00 192 2012 2 4.21951e+01 2.45889e+00 54 2012 3 4.95999e+01 2.39516e+00 186 2012 4 5.59049e+01 1.70633e+00 209 2012 5 6.16064e+01 1.26252e+00 140 2012 6 6.26163e+01 2.58799e-01 76 2012 7 6.15986e+01 8.17150e-01 62 2012 8 5.65798e+01 4.35248e-03 16 2012 9 5.35118e+01 2.00913e+00 24 2012 10 4.11529e+01 2.27928e+00 239 2012 11 3.38564e+01 2.02769e+00 276 2012 12 2.95637e+01 3.78260e-01 130 2013 1 3.29306e+01 1.33964e+00 101 2013 2 3.92451e+01 3.05680e+00 97 2013 3 4.86949e+01 3.07000e+00 161 2013 4 5.60818e+01 1.26554e+00 84 2013 5 6.23641e+01 6.96762e-01 105 2013 6 6.29541e+01 3.91858e-01 58 2013 7 6.22784e+01 1.90025e-03 16 2013 8 5.84460e+01 6.46499e-01 42 2013 9 5.22306e+01 1.53111e+00 91 2013 10 4.21759e+01 2.93748e+00 115 2013 11 3.32167e+01 2.10732e+00 154 2013 12 2.93095e+01 2.33892e-01 120 2014 1 3.10489e+01 1.40535e+00 119 2014 2 4.00666e+01 2.57290e+00 153 2014 3 4.94511e+01 3.38382e+00 122 2014 4 5.60179e+01 1.44598e+00 80 2014 5 6.17807e+01 7.02258e-01 81 2014 6 6.24573e+01 9.57173e-02 44 2014 7 6.16826e+01 8.95914e-01 78 2014 8 5.85782e+01 1.65013e+00 70 2014 9 5.08096e+01 2.15787e+00 94 2014 10 4.21039e+01 2.89654e+00 337 2014 11 3.37034e+01 2.41692e+00 197 2014 12 2.95789e+01 3.38084e-01 196 2015 1 3.23073e+01 1.79404e+00 159 2015 2 3.85721e+01 1.74177e+00 191 2015 3 4.94109e+01 2.45974e+00 119 2015 4 5.44585e+01 1.84259e+00 48 2015 5 6.17718e+01 1.27425e+00 166 2015 6 6.24887e+01 1.43922e-01 102 2015 7 6.14608e+01 5.69608e-01 60 2015 8 5.69748e+01 1.44650e+00 67 2015 9 5.06784e+01 2.27669e+00 96 2015 10 4.19554e+01 1.91552e+00 140 2015 11 3.30859e+01 2.17982e+00 176 2015 12 2.95164e+01 3.55756e-01 107 2016 1 3.08924e+01 1.52212e+00 191 2016 2 4.04103e+01 2.44164e+00 209 2016 3 4.83072e+01 2.54662e+00 175 2016 4 5.45060e+01 1.70369e+00 64 2016 5 6.21677e+01 7.23108e-01 114 2016 6 6.26882e+01 2.22250e-01 129 2016 7 6.18088e+01 7.21457e-01 140 2016 8 5.79607e+01 1.22794e+00 88 2016 9 5.01204e+01 2.74182e+00 127 2016 10 4.14791e+01 2.56352e+00 244 2016 11 3.35649e+01 1.82458e+00 183 2016 12 2.94787e+01 5.04184e-01 170 2017 1 3.15910e+01 2.00291e+00 162 2017 2 3.96105e+01 2.93840e+00 224 2017 3 5.01505e+01 2.36156e+00 158 2017 4 5.48590e+01 1.32034e+00 125 2017 5 6.16947e+01 1.14968e+00 127 2017 6 6.24202e+01 2.62386e-01 48 2017 7 6.14366e+01 7.04794e-01 96 2017 8 5.71733e+01 6.03022e-01 47 2017 9 4.92480e+01 1.88443e+00 97 2017 10 4.04647e+01 2.01470e+00 201 2017 11 3.38443e+01 2.05564e+00 258 2017 12 2.94012e+01 1.74258e-01 138 2018 1 3.15036e+01 1.99754e+00 208 2018 2 4.11132e+01 2.31288e+00 120 2018 3 4.88591e+01 3.04725e+00 216 2018 4 5.59841e+01 1.86534e+00 176 2018 5 6.18717e+01 1.13469e+00 83 2018 6 6.24563e+01 1.04599e-01 54 2018 7 6.16401e+01 6.12775e-01 96 2018 8 5.79308e+01 1.60416e+00 42 2018 9 5.15868e+01 1.74296e+00 128 2018 10 4.21229e+01 2.96598e+00 210 2018 11 3.35816e+01 1.62125e+00 81 2018 12 2.96296e+01 3.73081e-01 101 2019 1 3.09555e+01 1.78892e+00 210 2019 2 4.06545e+01 2.73273e+00 70 2019 3 5.00336e+01 2.78833e+00 185 2019 4 5.69512e+01 9.14665e-01 79 2019 5 6.17423e+01 1.30785e+00 188 2019 6 6.29208e+01 4.32083e-01 80 2019 7 6.16093e+01 5.17690e-01 52 2019 8 5.89808e+01 1.20995e+00 79 2019 9 4.98447e+01 2.66951e+00 140 2019 10 4.34457e+01 2.32911e+00 128 2019 11 3.39565e+01 2.31574e+00 157 2019 12 2.96742e+01 4.43112e-01 101 2020 1 3.06678e+01 1.85714e+00 121 2020 2 3.99888e+01 3.42420e+00 137 2020 3 4.91656e+01 2.20199e+00 177 2020 4 5.59988e+01 2.17341e+00 117 2020 5 6.13918e+01 1.19019e+00 121 2020 6 6.26729e+01 1.50322e-01 72 2020 7 6.08732e+01 4.89590e-01 48 2020 8 5.98360e+01 3.91075e-01 48 2020 9 4.84871e+01 3.44831e-01 25 2020 10 4.28377e+01 2.35038e+00 135 2020 11 3.35589e+01 1.87719e+00 187 2020 12 2.94469e+01 3.33772e-01 176 2021 1 3.12351e+01 2.01204e+00 99 2021 2 4.16973e+01 2.41507e+00 128 2021 3 4.79326e+01 1.88824e+00 112 2021 4 5.54392e+01 1.99624e+00 154 2021 5 6.23425e+01 7.27363e-01 95 2021 6 6.24953e+01 1.67149e-01 65 2021 7 6.12673e+01 4.01444e-01 81 2021 8 5.79742e+01 1.40212e+00 61 2021 9 4.87857e+01 1.12170e+00 34 2021 10 3.94769e+01 9.00544e-01 18 2021 11 3.34044e+01 1.86606e+00 189 2021 12 2.93350e+01 3.95105e-01 128 2022 1 3.12138e+01 2.14718e+00 173 2022 2 4.05333e+01 2.08730e+00 144 2022 3 4.94727e+01 3.02403e+00 213 2022 4 5.75951e+01 5.20647e-01 32 2022 5 6.15616e+01 1.78284e+00 78 2022 6 6.24708e+01 1.00843e-01 79 2022 7 6.15931e+01 6.44610e-01 124 2022 8 5.71549e+01 1.59464e+00 129 2022 9 4.97313e+01 2.44554e+00 98 2022 10 4.29386e+01 2.35504e+00 289 2022 11 3.42920e+01 2.24348e+00 122 2022 12 2.95268e+01 4.23666e-01 204 2023 1 3.09078e+01 1.73948e+00 188 2023 2 3.91108e+01 2.46527e+00 144 2023 3 4.82686e+01 2.39944e+00 140 2023 4 5.55427e+01 1.64298e+00 114 2023 5 6.10354e+01 1.81173e+00 80 2023 6 6.25670e+01 2.40585e-01 49 2023 7 6.14275e+01 8.43803e-01 44 2023 8 5.84580e+01 1.18171e+00 81 2023 9 5.16697e+01 1.94066e+00 157 2023 10 4.04899e+01 2.33306e+00 173 2023 11 3.44151e+01 2.02650e+00 142 2023 12 2.91982e+01 2.01122e-01 80 2024 1 3.10463e+01 1.83419e+00 116 2024 2 4.07531e+01 2.41794e+00 144 2024 3 5.05467e+01 3.10949e+00 96 2024 4 5.31929e+01 4.77636e-01 32