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 6.23652e+01 3.59643e-01 144 2002 8 5.72566e+01 1.37035e+00 85 2002 9 4.96625e+01 1.97767e+00 96 2002 10 4.34275e+01 2.22910e+00 128 2002 11 3.29892e+01 1.97177e+00 176 2002 12 2.93691e+01 4.55355e-01 180 2003 1 3.11800e+01 1.56468e+00 240 2003 2 3.82533e+01 2.24513e+00 144 2003 3 5.05335e+01 1.98450e+00 153 2003 4 5.75910e+01 2.18318e+00 144 2003 5 6.29110e+01 6.65822e-01 64 2003 6 6.30083e+01 2.07462e-01 57 2003 7 6.24711e+01 5.10911e-01 88 2003 8 5.72978e+01 8.94979e-01 80 2003 9 5.14968e+01 2.50644e+00 166 2003 10 4.21766e+01 2.77259e+00 240 2003 11 3.37695e+01 2.04482e+00 256 2003 12 2.93348e+01 4.05190e-01 192 2004 1 3.19862e+01 1.55571e+00 113 2004 2 3.97937e+01 1.86521e+00 48 2004 3 5.03372e+01 2.27077e+00 224 2004 4 5.69434e+01 2.02493e+00 176 2004 5 6.20757e+01 9.22697e-01 176 2004 6 6.30289e+01 1.23709e-01 64 2004 7 6.23287e+01 2.96718e-01 66 2004 8 5.84412e+01 1.48405e+00 128 2004 9 5.09756e+01 2.43063e+00 176 2004 10 4.25043e+01 3.33801e+00 96 2004 11 3.34062e+01 2.15082e+00 128 2004 12 2.91965e+01 3.48845e-01 164 2005 1 3.22811e+01 1.20945e+00 140 2005 2 3.92067e+01 1.81002e+00 96 2005 3 4.75381e+01 2.61699e+00 176 2005 4 5.71675e+01 1.61984e+00 136 2005 5 6.19616e+01 7.93711e-01 144 2005 6 6.31843e+01 1.62141e-01 151 2005 7 6.20644e+01 6.23138e-01 160 2005 8 5.72999e+01 1.50300e+00 96 2005 9 5.19930e+01 2.07193e+00 194 2005 10 4.16991e+01 2.26655e+00 320 2005 11 3.31275e+01 2.17558e+00 199 2005 12 2.92699e+01 5.09530e-01 144 2006 1 3.19038e+01 1.87843e+00 160 2006 2 3.95757e+01 2.95231e+00 178 2006 3 4.96281e+01 2.80647e+00 239 2006 4 5.70928e+01 1.77925e+00 184 2006 5 6.20531e+01 7.55856e-01 176 2006 6 6.30642e+01 1.58595e-01 175 2006 7 6.17660e+01 5.27548e-01 80 2006 8 5.79786e+01 1.58969e+00 96 2006 9 5.12819e+01 2.69917e+00 176 2006 10 4.23539e+01 2.99938e+00 236 2006 11 3.36083e+01 2.01570e+00 256 2006 12 2.94995e+01 5.21959e-01 181 2007 1 3.20362e+01 1.68958e+00 80 2007 2 3.95737e+01 2.12097e+00 102 2007 3 4.85971e+01 2.70623e+00 224 2007 4 5.82733e+01 1.62103e+00 149 2007 5 6.13703e+01 8.31947e-01 86 2007 6 6.31958e+01 2.32892e-01 96 2007 7 6.24542e+01 3.47380e-01 81 2007 8 5.79728e+01 1.42283e+00 101 2007 9 4.99261e+01 2.22634e+00 130 2007 10 4.24441e+01 3.11262e+00 196 2007 11 3.42962e+01 2.10958e+00 240 2007 12 2.93727e+01 2.97755e-01 139 2008 1 3.15286e+01 2.13778e+00 96 2008 2 3.98701e+01 2.88952e+00 236 2008 3 4.94505e+01 2.81792e+00 191 2008 4 5.86991e+01 1.12504e+00 144 2008 5 6.19803e+01 8.68026e-01 135 2008 6 6.31964e+01 2.23281e-01 156 2008 7 6.23231e+01 3.34867e-01 80 2008 8 5.67427e+01 1.99702e+00 80 2008 9 5.06310e+01 2.67720e+00 208 2008 10 4.10204e+01 2.84152e+00 208 2008 11 3.35331e+01 2.00110e+00 315 2008 12 2.94318e+01 4.38502e-01 98 2009 1 3.21596e+01 1.60939e+00 164 2009 2 3.89689e+01 2.92389e+00 129 2009 3 4.85048e+01 2.86766e+00 128 2009 4 5.76604e+01 1.87091e+00 128 2009 5 6.24075e+01 7.27234e-01 48 2009 6 6.31533e+01 1.70077e-01 176 2009 7 6.23071e+01 4.04784e-01 81 2009 8 5.78457e+01 1.59457e+00 128 2009 9 5.01376e+01 2.43838e+00 161 2009 10 4.21235e+01 2.18339e+00 169 2009 11 3.42638e+01 2.01916e+00 212 2009 12 2.91240e+01 9.48442e-02 64 2010 1 3.11732e+01 1.53458e+00 200 2010 2 4.06743e+01 2.29123e+00 154 2010 3 4.92018e+01 2.84473e+00 192 2010 4 5.72188e+01 2.02016e+00 192 2010 5 6.21370e+01 8.57741e-01 144 2010 6 6.29497e+01 1.89496e-01 174 2010 7 6.19217e+01 8.29445e-01 128 2010 8 5.73915e+01 1.01581e+00 80 2010 9 5.12173e+01 2.47747e+00 203 2010 10 4.27173e+01 2.48803e+00 352 2010 11 3.43522e+01 1.60922e+00 176 2010 12 2.95479e+01 4.93004e-01 206 2011 1 3.14706e+01 1.56987e+00 208 2011 2 4.08093e+01 1.74929e+00 181 2011 3 5.01055e+01 1.75524e+00 192 2011 4 5.74157e+01 1.98838e+00 122 2011 5 6.21565e+01 8.64870e-01 226 2011 6 6.30976e+01 1.66021e-01 144 2011 7 6.18802e+01 8.02932e-01 141 2011 8 5.73525e+01 1.45594e+00 160 2011 9 5.10257e+01 2.45448e+00 182 2011 10 4.25117e+01 2.89594e+00 320 2011 11 3.35614e+01 2.42081e+00 192 2011 12 2.92759e+01 5.01114e-01 109 2012 1 3.13778e+01 1.72260e+00 226 2012 2 4.01263e+01 2.49526e+00 60 2012 3 4.90970e+01 2.94815e+00 240 2012 4 5.74119e+01 2.07448e+00 188 2012 5 6.20154e+01 8.86326e-01 176 2012 6 6.31886e+01 1.62156e-01 112 2012 7 6.18252e+01 4.65325e-01 56 2012 8 5.75957e+01 1.16464e+00 108 2012 9 5.09660e+01 2.34273e+00 156 2012 10 4.12525e+01 2.49867e+00 304 2012 11 3.41072e+01 1.97643e+00 307 2012 12 2.95440e+01 4.73849e-01 122 2013 1 3.29376e+01 1.58033e+00 114 2013 2 3.84246e+01 2.02846e+00 128 2013 3 5.01706e+01 2.72139e+00 176 2013 4 5.68270e+01 1.76635e+00 80 2013 5 6.22022e+01 8.10288e-01 192 2013 6 6.30932e+01 1.99229e-01 123 2013 7 6.20513e+01 5.13690e-01 127 2013 8 5.68256e+01 1.13876e+00 78 2013 9 5.13668e+01 2.23041e+00 215 2013 10 4.23675e+01 2.44755e+00 192 2013 11 3.36571e+01 2.51454e+00 112 2013 12 2.92620e+01 4.21834e-01 112 2014 1 3.15957e+01 8.09378e-01 130 2014 2 4.02880e+01 1.92655e+00 156 2014 3 5.01278e+01 2.91954e+00 160 2014 4 5.69659e+01 1.66066e+00 112 2014 5 6.19646e+01 7.65483e-01 160 2014 6 6.30721e+01 1.43590e-01 106 2014 7 6.23652e+01 6.99906e-01 108 2014 8 5.73105e+01 1.13663e+00 128 2014 9 5.18474e+01 1.93186e+00 144 2014 10 4.17613e+01 2.75912e+00 358 2014 11 3.36860e+01 2.21005e+00 224 2014 12 2.94818e+01 4.10754e-01 192 2015 1 3.24575e+01 1.82892e+00 160 2015 2 3.84578e+01 1.70731e+00 196 2015 3 4.91195e+01 2.29813e+00 100 2015 4 5.55433e+01 2.17105e+00 48 2015 5 6.15558e+01 8.82169e-01 177 2015 6 6.30253e+01 1.40917e-01 160 2015 7 6.18083e+01 7.22543e-01 158 2015 8 5.72964e+01 1.77260e+00 176 2015 9 5.12908e+01 2.61274e+00 160 2015 10 4.29887e+01 1.50305e+00 160 2015 11 3.26062e+01 1.80898e+00 223 2015 12 2.95552e+01 3.55178e-01 100 2016 1 3.17506e+01 1.71499e+00 168 2016 2 3.97546e+01 2.50083e+00 272 2016 3 4.83612e+01 2.80119e+00 144 2016 4 5.72444e+01 2.04917e+00 158 2016 5 6.21102e+01 8.54562e-01 192 2016 6 6.31369e+01 1.33882e-01 163 2016 7 6.24788e+01 4.66037e-01 112 2016 8 5.73618e+01 1.43516e+00 192 2016 9 4.98087e+01 2.36997e+00 223 2016 10 4.17727e+01 2.72933e+00 324 2016 11 3.36516e+01 1.86815e+00 240 2016 12 2.94072e+01 5.41527e-01 192 2017 1 3.24271e+01 1.84541e+00 192 2017 2 3.99934e+01 2.60690e+00 252 2017 3 4.93285e+01 2.64284e+00 208 2017 4 5.67609e+01 1.60596e+00 176 2017 5 6.18898e+01 8.39030e-01 152 2017 6 6.31447e+01 1.06762e-01 80 2017 7 6.18108e+01 7.08778e-01 145 2017 8 5.80352e+01 1.03781e+00 115 2017 9 4.97304e+01 2.35017e+00 191 2017 10 4.14500e+01 2.67787e+00 257 2017 11 3.38922e+01 1.88452e+00 269 2017 12 2.93127e+01 3.27174e-01 144 2018 1 3.17403e+01 1.73493e+00 240 2018 2 4.02649e+01 2.50437e+00 124 2018 3 4.89533e+01 3.08510e+00 220 2018 4 5.72705e+01 1.74125e+00 194 2018 5 6.17795e+01 7.35608e-01 176 2018 6 6.29644e+01 9.42029e-02 127 2018 7 6.21181e+01 6.15412e-01 96 2018 8 5.74753e+01 1.40422e+00 75 2018 9 5.14396e+01 2.17430e+00 191 2018 10 4.21993e+01 2.78895e+00 272 2018 11 3.35450e+01 1.79372e+00 96 2018 12 2.93785e+01 4.34568e-01 128 2019 1 3.13981e+01 1.68462e+00 169 2019 2 4.12616e+01 1.83324e+00 41 2019 3 5.07724e+01 2.63722e+00 160 2019 4 5.86306e+01 1.26409e+00 144 2019 5 6.19030e+01 9.17647e-01 240 2019 6 6.32934e+01 2.46415e-01 96 2019 7 6.19544e+01 6.77013e-01 121 2019 8 5.81376e+01 1.44819e+00 96 2019 9 5.09353e+01 2.53563e+00 320 2019 10 4.36320e+01 2.52066e+00 164 2019 11 3.37636e+01 2.27931e+00 180 2019 12 2.94458e+01 5.14222e-01 144 2020 1 3.21458e+01 1.73945e+00 121 2020 2 3.96920e+01 3.51668e+00 128 2020 3 4.89258e+01 2.70601e+00 102 2020 4 5.73688e+01 2.11532e+00 144 2020 5 6.16559e+01 8.35588e-01 157 2020 6 6.31778e+01 1.58926e-01 127 2020 7 6.19947e+01 7.19605e-01 112 2020 8 5.94647e+01 6.81076e-01 93 2020 9 5.18807e+01 2.62384e+00 124 2020 10 4.24919e+01 2.22817e+00 210 2020 11 3.40685e+01 1.71134e+00 224 2020 12 2.93707e+01 4.35627e-01 208 2021 1 3.15955e+01 1.82239e+00 144 2021 2 4.08562e+01 2.52285e+00 80 2021 3 4.81425e+01 2.25231e+00 156 2021 4 5.66634e+01 2.31794e+00 176 2021 5 6.21499e+01 9.37284e-01 160 2021 6 6.30366e+01 1.50744e-01 80 2021 7 6.14325e+01 5.04789e-01 112 2021 8 5.84239e+01 1.28154e+00 176 2021 9 5.09861e+01 2.32492e+00 128 2021 10 4.19202e+01 2.89496e+00 176 2021 11 3.35844e+01 1.93520e+00 272 2021 12 2.93626e+01 5.35695e-01 128 2022 1 3.24834e+01 1.80625e+00 172 2022 2 3.96291e+01 2.23173e+00 208 2022 3 4.86295e+01 3.01912e+00 234 2022 4 5.89551e+01 6.56203e-01 80 2022 5 6.18735e+01 9.79816e-01 184 2022 6 6.31121e+01 2.01904e-01 156 2022 7 6.18810e+01 7.80530e-01 128 2022 8 5.72737e+01 2.00900e+00 121 2022 9 5.01362e+01 2.13139e+00 224 2022 10 4.25578e+01 2.63743e+00 288 2022 11 3.42743e+01 1.90970e+00 172 2022 12 2.93129e+01 4.89949e-01 118 2023 1 3.12540e+01 1.73851e+00 224 2023 2 3.91554e+01 2.45024e+00 158 2023 3 4.86820e+01 2.08574e+00 103 2023 4 5.86641e+01 5.91939e-01 64 2023 5 6.19145e+01 9.34749e-01 144 2023 6 6.30575e+01 1.82783e-01 80 2023 7 6.17001e+01 8.64207e-01 148 2023 8 5.82573e+01 1.35957e+00 144 2023 9 5.15015e+01 1.90556e+00 168 2023 10 4.14557e+01 2.86035e+00 212 2023 11 3.41701e+01 2.24258e+00 192 2023 12 2.89811e+01 1.93037e-01 80 2024 1 3.13369e+01 1.72119e+00 96 2024 2 4.05384e+01 2.44872e+00 128 2024 3 5.18981e+01 2.04494e+00 69 2024 4 5.47573e+01 3.94952e-01 32