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 nan nan 0 2002 8 5.77159e+01 7.65561e-01 59 2002 9 4.89336e+01 1.47859e+00 62 2002 10 4.27995e+01 2.67025e+00 110 2002 11 3.40844e+01 2.15368e+00 240 2002 12 2.91005e+01 7.88870e-01 123 2003 1 3.18479e+01 1.25140e+00 236 2003 2 3.95432e+01 2.36766e+00 160 2003 3 5.00880e+01 1.81034e+00 48 2003 4 5.87391e+01 1.64044e+00 48 2003 5 6.33585e+01 3.70806e-03 16 2003 6 6.35676e+01 1.51822e-01 29 2003 7 6.13180e+01 3.80742e-03 16 2003 8 5.95876e+01 3.66588e-03 5 2003 9 5.00627e+01 2.21673e+00 89 2003 10 4.22496e+01 2.77112e+00 192 2003 11 3.38040e+01 1.70588e+00 243 2003 12 2.90666e+01 6.79564e-01 195 2004 1 3.20508e+01 1.73992e+00 160 2004 2 4.21986e+01 1.43573e+00 64 2004 3 4.98969e+01 2.12901e+00 165 2004 4 5.78479e+01 1.99751e+00 106 2004 5 6.23340e+01 9.97920e-01 112 2004 6 6.35870e+01 1.49017e-01 64 2004 7 6.11506e+01 7.58180e-01 68 2004 8 5.85532e+01 1.56461e+00 83 2004 9 5.14211e+01 2.91931e+00 52 2004 10 4.22564e+01 3.16962e+00 64 2004 11 3.50701e+01 1.79247e+00 128 2004 12 2.86652e+01 1.77145e-01 126 2005 1 3.33945e+01 1.03760e+00 144 2005 2 3.87572e+01 1.69760e+00 112 2005 3 4.91459e+01 3.38664e+00 128 2005 4 5.78163e+01 1.95550e+00 36 2005 5 6.18252e+01 1.08483e+00 46 2005 6 6.36692e+01 1.75463e-01 61 2005 7 6.17207e+01 5.93383e-01 61 2005 8 5.88322e+01 6.01689e-01 62 2005 9 5.05744e+01 2.57125e+00 64 2005 10 4.18069e+01 2.56521e+00 181 2005 11 3.43881e+01 1.89355e+00 247 2005 12 2.90188e+01 7.71711e-01 183 2006 1 3.20575e+01 1.79036e+00 188 2006 2 3.93937e+01 2.09753e+00 147 2006 3 4.90912e+01 2.91884e+00 272 2006 4 5.68385e+01 1.66795e+00 77 2006 5 6.23819e+01 7.64308e-01 120 2006 6 6.37092e+01 7.90548e-02 64 2006 7 6.09194e+01 7.75537e-01 31 2006 8 5.89002e+01 1.39514e+00 49 2006 9 4.98833e+01 2.33001e+00 139 2006 10 4.23196e+01 2.81721e+00 226 2006 11 3.41320e+01 1.91184e+00 206 2006 12 2.89008e+01 5.80857e-01 119 2007 1 3.24733e+01 1.81459e+00 128 2007 2 4.05623e+01 2.24361e+00 245 2007 3 4.96873e+01 2.66036e+00 240 2007 4 5.74964e+01 2.15488e+00 175 2007 5 6.09371e+01 3.31530e-03 16 2007 6 6.35595e+01 4.27169e-03 16 2007 7 6.11326e+01 7.30926e-01 60 2007 8 5.79504e+01 1.66199e+00 83 2007 9 5.02583e+01 2.26535e+00 105 2007 10 4.39242e+01 1.80075e+00 160 2007 11 3.44786e+01 1.96639e+00 266 2007 12 2.89705e+01 6.03085e-01 208 2008 1 3.22299e+01 1.96124e+00 204 2008 2 3.97156e+01 2.93133e+00 297 2008 3 5.03575e+01 2.94729e+00 223 2008 4 5.66767e+01 2.02868e+00 114 2008 5 6.26510e+01 8.21539e-01 90 2008 6 6.37399e+01 2.30715e-01 54 2008 7 6.18454e+01 5.21989e-01 70 2008 8 6.03917e+01 1.01546e-01 32 2008 9 4.98506e+01 1.59202e+00 108 2008 10 4.21886e+01 2.98417e+00 192 2008 11 3.42507e+01 1.62271e+00 208 2008 12 2.93300e+01 9.11093e-01 198 2009 1 3.31528e+01 1.65980e+00 159 2009 2 3.98568e+01 2.48702e+00 240 2009 3 4.79823e+01 2.08249e+00 216 2009 4 5.68691e+01 2.03132e+00 100 2009 5 6.24441e+01 8.82823e-01 59 2009 6 6.37200e+01 1.23894e-01 68 2009 7 6.25587e+01 1.15475e+00 45 2009 8 5.87217e+01 1.38383e+00 77 2009 9 5.12565e+01 1.96437e+00 64 2009 10 4.25310e+01 2.81506e+00 203 2009 11 3.45284e+01 1.66257e+00 128 2009 12 2.87048e+01 1.13493e-01 44 2010 1 3.19858e+01 1.63456e+00 195 2010 2 3.88835e+01 2.23139e+00 114 2010 3 4.88429e+01 2.91693e+00 117 2010 4 5.69729e+01 1.58754e+00 94 2010 5 6.14922e+01 6.09462e-01 80 2010 6 6.35812e+01 7.94079e-02 85 2010 7 6.02472e+01 1.37475e-01 18 2010 8 5.83010e+01 9.99451e-04 4 2010 9 5.05910e+01 2.47782e+00 103 2010 10 4.22961e+01 2.86559e+00 286 2010 11 3.39667e+01 2.01297e+00 263 2010 12 2.94257e+01 8.88866e-01 231 2011 1 3.26180e+01 1.82162e+00 160 2011 2 4.08470e+01 1.74471e+00 151 2011 3 4.95347e+01 2.13940e+00 184 2011 4 5.62941e+01 1.65868e+00 128 2011 5 6.24614e+01 6.90354e-01 119 2011 6 6.36701e+01 2.23304e-01 55 2011 7 6.08155e+01 1.04085e+00 53 2011 8 5.83672e+01 1.40331e+00 100 2011 9 5.10338e+01 2.30522e+00 148 2011 10 4.23564e+01 2.71521e+00 223 2011 11 3.41827e+01 2.08932e+00 212 2011 12 2.91396e+01 8.57354e-01 228 2012 1 3.21160e+01 1.85880e+00 269 2012 2 4.06082e+01 1.20906e+00 48 2012 3 5.00754e+01 2.35549e+00 222 2012 4 5.81326e+01 2.07688e+00 171 2012 5 6.20125e+01 9.19654e-01 116 2012 6 6.38556e+01 7.64279e-02 42 2012 7 6.19476e+01 2.36875e-03 16 2012 8 5.93980e+01 7.55918e-01 18 2012 9 5.06826e+01 2.89794e+00 108 2012 10 4.28006e+01 2.00993e+00 187 2012 11 3.42123e+01 2.16364e+00 204 2012 12 2.91923e+01 6.54663e-01 109 2013 1 3.36136e+01 1.10320e+00 148 2013 2 4.05257e+01 2.90652e+00 160 2013 3 4.86477e+01 2.75851e+00 143 2013 4 5.64399e+01 2.08741e+00 76 2013 5 6.21462e+01 8.74392e-01 78 2013 6 6.36308e+01 1.53482e-01 49 2013 7 6.02984e+01 2.01629e-01 32 2013 8 5.91595e+01 3.31016e-01 21 2013 9 5.08180e+01 2.34371e+00 95 2013 10 4.27162e+01 2.63417e+00 178 2013 11 3.41648e+01 2.17497e+00 140 2013 12 2.90752e+01 7.03633e-01 200 2014 1 3.18600e+01 1.08847e+00 128 2014 2 4.06623e+01 1.74374e+00 148 2014 3 4.85781e+01 1.96058e+00 144 2014 4 5.53795e+01 7.76397e-01 48 2014 5 nan nan 0 2014 6 6.36536e+01 1.24142e-01 32 2014 7 6.13529e+01 6.72032e-01 64 2014 8 5.82619e+01 2.07479e+00 52 2014 9 5.18378e+01 2.32593e+00 64 2014 10 4.19689e+01 2.58966e+00 320 2014 11 3.39335e+01 2.26573e+00 248 2014 12 2.90521e+01 5.55203e-01 146 2015 1 3.30625e+01 1.79388e+00 217 2015 2 3.88294e+01 1.81641e+00 188 2015 3 4.97179e+01 2.71693e+00 95 2015 4 5.79757e+01 2.46781e+00 35 2015 5 6.26422e+01 4.54695e-01 66 2015 6 6.35745e+01 2.10145e-01 108 2015 7 6.12975e+01 7.56590e-03 16 2015 8 5.87662e+01 1.50206e+00 45 2015 9 5.24401e+01 1.63071e+00 48 2015 10 4.12443e+01 2.90335e+00 92 2015 11 3.36486e+01 2.04357e+00 140 2015 12 2.90708e+01 5.07368e-01 128 2016 1 3.27591e+01 1.35847e+00 176 2016 2 4.01255e+01 2.57715e+00 261 2016 3 4.87459e+01 2.80698e+00 184 2016 4 5.72827e+01 1.77922e+00 116 2016 5 6.17619e+01 8.60179e-01 78 2016 6 6.35222e+01 1.44337e-01 70 2016 7 6.12343e+01 6.74326e-01 112 2016 8 5.79609e+01 1.14927e+00 119 2016 9 4.96167e+01 2.11535e+00 128 2016 10 4.22490e+01 2.73629e+00 134 2016 11 3.36249e+01 1.68925e+00 199 2016 12 2.88989e+01 6.05492e-01 188 2017 1 3.22591e+01 1.60807e+00 160 2017 2 3.99879e+01 2.73909e+00 259 2017 3 4.94649e+01 2.41244e+00 238 2017 4 5.72351e+01 1.85853e+00 144 2017 5 6.24069e+01 6.78499e-01 80 2017 6 6.36878e+01 8.25039e-02 49 2017 7 6.13613e+01 9.63134e-01 43 2017 8 5.89111e+01 9.90951e-01 79 2017 9 5.06001e+01 3.04834e+00 65 2017 10 4.09345e+01 2.12211e+00 151 2017 11 3.38045e+01 1.95280e+00 225 2017 12 2.92144e+01 7.20388e-01 174 2018 1 3.26231e+01 1.65333e+00 208 2018 2 4.09933e+01 2.72415e+00 128 2018 3 4.87346e+01 2.89287e+00 146 2018 4 5.69459e+01 2.23932e+00 108 2018 5 6.20102e+01 9.60058e-01 80 2018 6 6.35350e+01 1.30284e-01 64 2018 7 6.17787e+01 1.15104e+00 54 2018 8 5.74475e+01 1.23807e+00 80 2018 9 5.03183e+01 1.76725e+00 164 2018 10 4.19018e+01 2.50807e+00 196 2018 11 3.47113e+01 1.64896e+00 48 2018 12 2.92386e+01 7.27355e-01 158 2019 1 3.27669e+01 1.40326e+00 109 2019 2 4.24820e+01 7.38611e-01 48 2019 3 4.92345e+01 2.49123e+00 143 2019 4 5.74760e+01 1.60245e+00 105 2019 5 6.22924e+01 6.48005e-01 102 2019 6 6.35959e+01 8.56012e-02 39 2019 7 6.16635e+01 1.27537e+00 71 2019 8 5.89963e+01 1.48180e+00 80 2019 9 5.04696e+01 2.34172e+00 50 2019 10 4.20444e+01 3.12860e+00 135 2019 11 3.36686e+01 2.05171e+00 176 2019 12 2.91712e+01 8.39186e-01 128 2020 1 3.20848e+01 1.71322e+00 160 2020 2 4.03223e+01 3.17172e+00 128 2020 3 4.87922e+01 2.38579e+00 123 2020 4 5.77456e+01 2.28519e+00 123 2020 5 6.15949e+01 8.31772e-01 148 2020 6 6.37042e+01 1.63165e-01 74 2020 7 6.18156e+01 3.53529e-01 32 2020 8 6.00557e+01 2.60066e-01 44 2020 9 5.04250e+01 2.34626e-03 16 2020 10 4.22692e+01 1.89095e+00 103 2020 11 3.41751e+01 1.83645e+00 155 2020 12 2.90038e+01 5.17871e-01 125 2021 1 3.23297e+01 1.94839e+00 103 2021 2 4.20134e+01 1.63231e+00 128 2021 3 4.80634e+01 1.50520e+00 127 2021 4 5.65596e+01 1.41707e+00 62 2021 5 6.24631e+01 7.05499e-01 97 2021 6 6.35653e+01 9.07124e-02 48 2021 7 6.05198e+01 1.72476e-03 12 2021 8 5.79605e+01 3.23885e-01 17 2021 9 4.95502e+01 1.87731e+00 135 2021 10 4.21505e+01 2.02133e+00 108 2021 11 3.41181e+01 1.65291e+00 186 2021 12 2.87264e+01 5.17668e-01 127 2022 1 3.25652e+01 1.79271e+00 195 2022 2 4.06299e+01 2.51649e+00 166 2022 3 4.88346e+01 2.74703e+00 172 2022 4 5.92190e+01 1.58193e-03 16 2022 5 6.15229e+01 1.03898e+00 64 2022 6 6.35051e+01 1.69622e-01 62 2022 7 6.20715e+01 1.32703e+00 65 2022 8 5.88271e+01 1.17824e+00 134 2022 9 5.00667e+01 2.85818e+00 71 2022 10 4.23703e+01 2.63053e+00 260 2022 11 3.50713e+01 1.73607e+00 135 2022 12 2.90524e+01 7.04328e-01 242 2023 1 3.24918e+01 1.65218e+00 198 2023 2 3.92657e+01 2.65249e+00 131 2023 3 4.94035e+01 2.46187e+00 208 2023 4 5.75214e+01 1.90502e+00 48 2023 5 6.16037e+01 8.81739e-01 96 2023 6 6.35969e+01 1.06212e-01 48 2023 7 6.18101e+01 1.49572e+00 34 2023 8 5.76907e+01 1.94252e+00 96 2023 9 5.08486e+01 1.03798e+00 74 2023 10 4.11737e+01 1.81075e+00 112 2023 11 3.47736e+01 2.15760e+00 200 2023 12 2.89981e+01 6.64978e-01 95 2024 1 3.19645e+01 2.25851e+00 97 2024 2 4.11677e+01 1.98459e+00 112 2024 3 5.17988e+01 2.34781e+00 64 2024 4 nan nan 0