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 6.18683e+01 4.61087e-01 36 2002 8 5.79743e+01 7.96789e-01 63 2002 9 4.89458e+01 2.42792e+00 72 2002 10 4.37531e+01 2.11524e+00 162 2002 11 3.37423e+01 2.15499e+00 238 2002 12 2.94919e+01 4.13419e-01 208 2003 1 3.16603e+01 1.51014e+00 188 2003 2 3.91531e+01 2.44034e+00 192 2003 3 5.15256e+01 2.27058e+00 77 2003 4 5.67331e+01 2.03621e+00 144 2003 5 6.16870e+01 1.04852e+00 82 2003 6 6.28160e+01 2.15304e-01 64 2003 7 6.08475e+01 5.82914e-01 48 2003 8 5.66470e+01 1.32790e+00 46 2003 9 5.19424e+01 2.40237e+00 48 2003 10 4.26067e+01 2.41353e+00 220 2003 11 3.35400e+01 1.89457e+00 265 2003 12 2.95804e+01 4.01703e-01 223 2004 1 3.17551e+01 1.55428e+00 128 2004 2 4.07159e+01 2.51900e+00 64 2004 3 4.91121e+01 1.54388e+00 134 2004 4 5.74893e+01 2.18598e+00 164 2004 5 6.16212e+01 8.32912e-01 235 2004 6 6.27945e+01 5.36216e-03 16 2004 7 6.20791e+01 9.74199e-02 48 2004 8 5.79746e+01 1.51076e+00 93 2004 9 5.01910e+01 2.36305e+00 74 2004 10 4.25936e+01 2.38856e+00 144 2004 11 3.39192e+01 1.76696e+00 160 2004 12 2.92946e+01 1.81834e-01 176 2005 1 3.25412e+01 1.50152e+00 144 2005 2 3.88308e+01 1.60441e+00 112 2005 3 4.83310e+01 2.80310e+00 192 2005 4 5.71623e+01 1.44102e+00 112 2005 5 6.15367e+01 7.39474e-01 132 2005 6 6.28981e+01 6.59446e-02 64 2005 7 6.13975e+01 8.64395e-01 95 2005 8 5.79100e+01 1.99890e-03 16 2005 9 5.07483e+01 2.51732e+00 64 2005 10 4.20881e+01 2.27236e+00 247 2005 11 3.40035e+01 1.87746e+00 231 2005 12 2.95159e+01 4.49677e-01 152 2006 1 3.17648e+01 1.82311e+00 208 2006 2 3.96453e+01 2.71392e+00 188 2006 3 4.85823e+01 3.02701e+00 234 2006 4 5.70835e+01 1.88522e+00 176 2006 5 6.19247e+01 7.91040e-01 176 2006 6 6.29035e+01 1.96986e-01 105 2006 7 6.11240e+01 6.67614e-01 48 2006 8 5.79227e+01 1.92423e+00 78 2006 9 4.97182e+01 2.32003e+00 141 2006 10 4.22759e+01 3.01844e+00 208 2006 11 3.36848e+01 2.11272e+00 261 2006 12 2.97003e+01 4.88057e-01 174 2007 1 3.22391e+01 1.54909e+00 89 2007 2 3.96342e+01 1.98695e+00 208 2007 3 4.88630e+01 2.60474e+00 286 2007 4 5.82689e+01 1.73726e+00 141 2007 5 6.14748e+01 8.87424e-01 96 2007 6 6.28021e+01 1.12888e-01 48 2007 7 6.16271e+01 6.02171e-01 80 2007 8 5.71954e+01 1.40726e+00 112 2007 9 4.94944e+01 2.01907e+00 112 2007 10 4.28594e+01 1.62790e+00 125 2007 11 3.46634e+01 2.05231e+00 223 2007 12 2.95602e+01 2.01706e-01 142 2008 1 3.15397e+01 1.95482e+00 208 2008 2 3.90759e+01 2.84743e+00 255 2008 3 5.05576e+01 2.75519e+00 194 2008 4 5.83923e+01 1.21558e+00 140 2008 5 6.17637e+01 8.50675e-01 109 2008 6 6.27952e+01 1.58403e-01 96 2008 7 6.14233e+01 7.10981e-01 64 2008 8 5.77033e+01 1.84940e+00 46 2008 9 5.01307e+01 2.34675e+00 112 2008 10 4.09030e+01 2.66709e+00 224 2008 11 3.40570e+01 1.87015e+00 256 2008 12 2.94886e+01 4.66571e-01 176 2009 1 3.18927e+01 1.71792e+00 223 2009 2 3.91707e+01 2.70546e+00 224 2009 3 4.77597e+01 2.12795e+00 220 2009 4 5.76758e+01 1.77964e+00 110 2009 5 6.16628e+01 1.00732e+00 92 2009 6 6.28478e+01 6.86560e-02 68 2009 7 6.20603e+01 6.03069e-01 48 2009 8 5.76028e+01 1.36726e+00 112 2009 9 4.97988e+01 2.18976e+00 104 2009 10 4.29196e+01 2.65383e+00 159 2009 11 3.35337e+01 1.78328e+00 144 2009 12 2.93466e+01 1.09232e-01 48 2010 1 3.13475e+01 1.68852e+00 219 2010 2 4.02196e+01 2.19050e+00 185 2010 3 4.87324e+01 3.29457e+00 192 2010 4 5.72770e+01 1.99383e+00 223 2010 5 6.17977e+01 8.85897e-01 130 2010 6 6.27983e+01 1.47178e-01 96 2010 7 6.16128e+01 8.40571e-01 53 2010 8 5.87049e+01 1.51820e+00 48 2010 9 5.08222e+01 2.61153e+00 184 2010 10 4.25173e+01 2.71319e+00 384 2010 11 3.35717e+01 1.93295e+00 267 2010 12 2.97104e+01 4.77875e-01 224 2011 1 3.18906e+01 1.62238e+00 240 2011 2 4.07476e+01 1.86536e+00 237 2011 3 4.84521e+01 2.41737e+00 192 2011 4 5.69240e+01 2.06465e+00 160 2011 5 6.16211e+01 8.62953e-01 230 2011 6 6.29245e+01 1.50220e-01 128 2011 7 6.14018e+01 7.10729e-01 35 2011 8 5.74210e+01 1.37090e+00 165 2011 9 5.09532e+01 2.40356e+00 176 2011 10 4.23086e+01 2.77923e+00 250 2011 11 3.41394e+01 2.04695e+00 185 2011 12 2.95364e+01 4.74489e-01 168 2012 1 3.18592e+01 2.00243e+00 224 2012 2 4.01188e+01 1.38699e+00 32 2012 3 4.96667e+01 2.40303e+00 201 2012 4 5.71735e+01 2.06071e+00 144 2012 5 6.16763e+01 8.68191e-01 129 2012 6 6.29106e+01 1.65145e-01 96 2012 7 6.17703e+01 5.97751e-01 64 2012 8 5.75757e+01 1.16146e+00 96 2012 9 4.86854e+01 1.73842e+00 97 2012 10 4.20640e+01 2.36905e+00 227 2012 11 3.41104e+01 2.18639e+00 252 2012 12 2.96185e+01 4.18743e-01 96 2013 1 3.32747e+01 1.22445e+00 113 2013 2 3.88030e+01 2.47704e+00 107 2013 3 4.78190e+01 2.40714e+00 159 2013 4 5.67363e+01 1.80643e+00 111 2013 5 6.19929e+01 7.05097e-01 128 2013 6 6.28359e+01 1.21635e-01 53 2013 7 6.17890e+01 5.35470e-01 47 2013 8 5.73238e+01 1.40825e+00 112 2013 9 5.04733e+01 2.44576e+00 178 2013 10 4.24842e+01 2.42809e+00 202 2013 11 3.36997e+01 2.22950e+00 144 2013 12 2.93124e+01 2.21627e-01 181 2014 1 3.15086e+01 9.58382e-01 112 2014 2 4.00939e+01 2.35044e+00 183 2014 3 4.93287e+01 2.83934e+00 156 2014 4 5.72440e+01 1.95384e+00 144 2014 5 6.16879e+01 7.32986e-01 136 2014 6 6.28027e+01 1.33106e-01 80 2014 7 6.14384e+01 9.42660e-01 74 2014 8 5.79689e+01 1.59543e+00 112 2014 9 5.08013e+01 2.20230e+00 117 2014 10 4.20441e+01 2.62014e+00 300 2014 11 3.40870e+01 2.27748e+00 224 2014 12 2.96303e+01 3.58685e-01 204 2015 1 3.24663e+01 2.00226e+00 176 2015 2 3.87738e+01 1.73117e+00 160 2015 3 4.88792e+01 2.82545e+00 172 2015 4 5.55609e+01 2.28506e+00 96 2015 5 6.15025e+01 7.56966e-01 155 2015 6 6.27840e+01 1.80400e-01 110 2015 7 6.13999e+01 5.80856e-01 74 2015 8 5.69546e+01 1.43259e+00 95 2015 9 5.12103e+01 1.20238e+00 64 2015 10 4.28367e+01 2.72233e+00 183 2015 11 3.30273e+01 2.01709e+00 216 2015 12 2.96386e+01 2.82244e-01 110 2016 1 3.12851e+01 1.49342e+00 160 2016 2 4.01598e+01 2.57490e+00 258 2016 3 4.80525e+01 2.03324e+00 144 2016 4 5.71235e+01 2.03313e+00 142 2016 5 6.17266e+01 7.86480e-01 166 2016 6 6.28770e+01 1.29135e-01 144 2016 7 6.16946e+01 7.93618e-01 121 2016 8 5.73416e+01 6.91915e-01 96 2016 9 5.02872e+01 2.42480e+00 84 2016 10 4.12872e+01 2.67381e+00 237 2016 11 3.38485e+01 1.93422e+00 192 2016 12 2.94498e+01 4.50466e-01 208 2017 1 3.13906e+01 1.59636e+00 179 2017 2 3.99660e+01 2.58566e+00 278 2017 3 4.96188e+01 2.61395e+00 208 2017 4 5.69987e+01 1.47677e+00 102 2017 5 6.18620e+01 7.66845e-01 128 2017 6 6.29164e+01 1.73683e-01 32 2017 7 6.20095e+01 5.79770e-01 54 2017 8 5.83472e+01 1.81669e+00 81 2017 9 4.97103e+01 2.33052e+00 128 2017 10 4.11192e+01 2.20699e+00 256 2017 11 3.37334e+01 2.15753e+00 303 2017 12 2.96033e+01 3.47901e-01 175 2018 1 3.18282e+01 1.71245e+00 241 2018 2 4.07642e+01 2.09351e+00 112 2018 3 4.84394e+01 2.81933e+00 239 2018 4 5.66418e+01 2.01332e+00 176 2018 5 6.14880e+01 8.98845e-01 131 2018 6 6.27046e+01 1.35604e-01 68 2018 7 6.12426e+01 5.81923e-01 96 2018 8 5.76791e+01 1.34177e+00 80 2018 9 4.99028e+01 1.67825e+00 158 2018 10 4.22969e+01 2.64471e+00 251 2018 11 3.35882e+01 1.81200e+00 112 2018 12 2.96202e+01 3.72617e-01 128 2019 1 3.18310e+01 1.59009e+00 224 2019 2 3.95594e+01 2.60994e+00 48 2019 3 4.98936e+01 2.65246e+00 192 2019 4 5.84843e+01 6.04807e-01 80 2019 5 6.17047e+01 8.66327e-01 188 2019 6 6.29471e+01 1.82531e-01 91 2019 7 6.11975e+01 8.14276e-01 61 2019 8 5.80341e+01 1.74339e+00 99 2019 9 5.01362e+01 2.68693e+00 182 2019 10 4.36934e+01 2.18547e+00 144 2019 11 3.40633e+01 2.13372e+00 224 2019 12 2.97043e+01 4.46124e-01 160 2020 1 3.11659e+01 1.82331e+00 144 2020 2 4.00066e+01 3.37492e+00 144 2020 3 5.03423e+01 2.27953e+00 171 2020 4 5.80620e+01 1.97442e+00 154 2020 5 6.12292e+01 8.46126e-01 108 2020 6 6.29647e+01 1.14743e-01 48 2020 7 6.08235e+01 3.47625e-01 31 2020 8 5.99337e+01 3.31571e-01 64 2020 9 4.95708e+01 2.03705e+00 68 2020 10 4.20488e+01 2.22183e+00 181 2020 11 3.41245e+01 1.99446e+00 217 2020 12 2.95478e+01 4.07719e-01 272 2021 1 3.16869e+01 1.82080e+00 144 2021 2 4.03749e+01 3.15729e+00 96 2021 3 4.77879e+01 1.83804e+00 128 2021 4 5.67398e+01 2.26466e+00 160 2021 5 6.19782e+01 6.06565e-01 112 2021 6 6.28630e+01 1.14404e-01 40 2021 7 6.10854e+01 3.96582e-01 78 2021 8 5.84295e+01 8.69251e-01 85 2021 9 4.90896e+01 1.78511e+00 80 2021 10 4.06065e+01 1.86780e+00 85 2021 11 3.34489e+01 1.90002e+00 233 2021 12 2.93860e+01 4.86156e-01 80 2022 1 3.14447e+01 1.94089e+00 224 2022 2 4.00199e+01 2.21854e+00 151 2022 3 4.92800e+01 2.97016e+00 208 2022 4 5.88391e+01 6.63198e-01 64 2022 5 6.13905e+01 1.16483e+00 80 2022 6 6.27792e+01 1.69949e-01 99 2022 7 6.15445e+01 6.49646e-01 90 2022 8 5.77178e+01 1.57485e+00 128 2022 9 4.95123e+01 1.93083e+00 125 2022 10 4.28364e+01 2.47674e+00 280 2022 11 3.49395e+01 1.86729e+00 132 2022 12 2.94704e+01 3.96027e-01 211 2023 1 3.17279e+01 1.58885e+00 208 2023 2 3.87177e+01 2.70643e+00 192 2023 3 4.86762e+01 1.99355e+00 141 2023 4 5.81862e+01 1.43049e+00 112 2023 5 6.17052e+01 7.24976e-01 112 2023 6 6.30434e+01 1.05757e-01 47 2023 7 6.15650e+01 1.04263e+00 53 2023 8 5.74230e+01 1.82203e+00 65 2023 9 5.10056e+01 1.69260e+00 138 2023 10 4.06319e+01 2.18585e+00 210 2023 11 3.45933e+01 2.11785e+00 192 2023 12 2.91626e+01 2.27197e-01 80 2024 1 3.14022e+01 1.93439e+00 128 2024 2 4.10380e+01 2.14771e+00 170 2024 3 5.10286e+01 2.95778e+00 98 2024 4 nan nan 0