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 1.53288e+00 5.30942e-01 42 2002 8 1.92781e+00 7.92427e-01 30 2002 9 2.10122e+00 4.81480e-02 11 2002 10 1.50047e+00 2.81365e-01 136 2002 11 1.62970e+00 2.01976e-01 205 2002 12 1.70326e+00 3.01916e-01 130 2003 1 1.41932e+00 2.72378e-01 325 2003 2 1.54969e+00 3.07157e-01 247 2003 3 2.15081e+00 6.45299e-01 80 2003 4 1.70309e+00 7.96528e-01 182 2003 5 1.84753e+00 3.45281e-01 68 2003 6 nan nan 0 2003 7 nan nan 0 2003 8 8.70150e-01 3.02803e-02 3 2003 9 8.96154e-01 4.98696e-02 12 2003 10 1.36258e+00 2.38285e-01 216 2003 11 1.83920e+00 4.63018e-01 189 2003 12 2.13432e+00 3.98645e-01 283 2004 1 2.07933e+00 4.25116e-01 317 2004 2 2.20407e+00 5.62421e-01 217 2004 3 2.14261e+00 9.01944e-01 76 2004 4 1.75837e+00 3.23007e-01 62 2004 5 2.64463e+00 1.21789e+00 65 2004 6 2.07545e+00 2.92910e-01 149 2004 7 1.50249e+00 2.36940e-01 20 2004 8 1.61239e+00 6.34312e-01 60 2004 9 1.01690e+00 3.01648e-01 42 2004 10 2.08743e+00 3.20784e+00 146 2004 11 1.51898e+00 2.92533e-01 178 2004 12 1.59557e+00 1.54804e-01 169 2005 1 2.15198e+00 5.30359e-01 161 2005 2 1.91983e+00 5.18009e-01 114 2005 3 1.93850e+00 3.24906e-01 185 2005 4 1.93418e+00 5.39702e-01 203 2005 5 2.24522e+00 3.87204e-01 44 2005 6 1.20443e+00 3.73429e-01 35 2005 7 2.56542e+00 4.91964e-01 13 2005 8 1.60320e+00 6.62643e-01 19 2005 9 1.20660e+00 2.96016e-01 40 2005 10 9.22479e-01 3.25693e-01 97 2005 11 1.52457e+00 5.65431e-01 153 2005 12 1.50558e+00 5.31069e-01 284 2006 1 2.27839e+00 5.46683e-01 209 2006 2 2.48237e+00 7.87786e-01 302 2006 3 2.17175e+00 7.57290e-01 356 2006 4 2.31907e+00 7.48301e-01 105 2006 5 1.68905e+00 4.65152e-01 119 2006 6 1.88588e+00 5.02709e-01 43 2006 7 6.40442e-01 4.33808e-01 10 2006 8 1.64579e+00 2.24268e-01 68 2006 9 9.31124e-01 4.01865e-01 94 2006 10 6.86781e-01 3.85310e-01 64 2006 11 1.43963e+00 5.05041e-01 181 2006 12 2.06034e+00 3.46624e-01 37 2007 1 2.13455e+00 4.07998e-01 173 2007 2 1.91754e+00 7.06645e-01 211 2007 3 2.27451e+00 7.41676e-01 235 2007 4 2.18289e+00 9.00095e-01 189 2007 5 1.76410e+00 6.95749e-01 79 2007 6 2.71644e+00 5.51405e-02 8 2007 7 2.36659e+00 5.44672e-01 33 2007 8 1.15904e+00 1.60384e-01 19 2007 9 1.42569e+00 4.18662e-01 69 2007 10 4.27695e+00 3.51390e+00 38 2007 11 1.54821e+00 3.84223e-01 112 2007 12 1.54736e+00 5.93743e-01 268 2008 1 1.98242e+00 3.99108e-01 320 2008 2 1.86807e+00 6.21635e-01 235 2008 3 1.91199e+00 4.28181e-01 188 2008 4 2.21759e+00 8.15314e-01 165 2008 5 2.39284e+00 4.39002e-01 178 2008 6 2.11391e+00 2.11066e-01 74 2008 7 1.34180e+00 1.66610e-01 15 2008 8 1.62269e+00 3.77522e-01 102 2008 9 1.40400e+00 2.35027e-02 29 2008 10 1.06564e+00 1.74176e-01 286 2008 11 1.82532e+00 4.16143e-01 309 2008 12 1.94800e+00 3.33997e-01 324 2009 1 1.99528e+00 2.17674e-01 343 2009 2 2.03101e+00 5.19889e-01 321 2009 3 2.51280e+00 7.74763e-01 285 2009 4 1.87523e+00 7.54917e-02 74 2009 5 2.15205e+00 3.18915e-01 103 2009 6 1.96910e+00 2.03584e-01 37 2009 7 1.65452e+00 4.53007e-01 51 2009 8 1.40129e+00 4.25286e-01 28 2009 9 1.09901e+00 2.61933e-01 42 2009 10 1.28805e+00 4.59658e-01 162 2009 11 1.51089e+00 2.88927e-01 222 2009 12 1.58830e+00 3.36830e-01 60 2010 1 2.29532e+00 1.74340e-01 210 2010 2 2.30445e+00 6.84780e-01 163 2010 3 2.24342e+00 3.72749e-01 446 2010 4 2.08393e+00 5.68792e-01 21 2010 5 2.01970e+00 2.59526e-01 48 2010 6 2.33267e+00 7.25938e-01 23 2010 7 1.74187e+00 4.27388e-01 25 2010 8 2.07775e+00 8.51671e-02 17 2010 9 nan nan 0 2010 10 1.58772e+00 3.54788e-01 411 2010 11 1.75475e+00 3.65828e-01 161 2010 12 1.84163e+00 5.82131e-01 339 2011 1 2.29383e+00 5.21978e-01 232 2011 2 2.24015e+00 4.73815e-01 161 2011 3 1.90540e+00 6.58418e-01 299 2011 4 2.00345e+00 6.69775e-01 108 2011 5 1.70597e+00 5.92586e-01 50 2011 6 1.86331e+00 4.35164e-01 59 2011 7 1.81637e+00 5.32111e-02 10 2011 8 nan nan 0 2011 9 1.53760e+00 2.23920e-01 107 2011 10 1.59832e+00 4.00125e-01 137 2011 11 2.00362e+00 5.12408e-01 262 2011 12 2.04080e+00 3.41039e-01 216 2012 1 1.76131e+00 4.36911e-01 190 2012 2 1.56301e+00 5.03394e-01 120 2012 3 2.27278e+00 9.47457e-01 103 2012 4 1.37817e+00 6.70223e-01 81 2012 5 1.67812e+00 6.56967e-01 51 2012 6 nan nan 0 2012 7 7.13567e-01 4.70123e-01 2 2012 8 1.44840e+00 2.43906e-01 5 2012 9 1.59315e+00 4.68692e-01 73 2012 10 1.27741e+00 3.29093e-01 52 2012 11 1.53475e+00 2.63864e-01 243 2012 12 1.42487e+00 3.90102e-01 173 2013 1 1.58440e+00 2.06370e-01 180 2013 2 2.14782e+00 4.21066e-01 295 2013 3 1.93021e+00 5.50601e-01 301 2013 4 2.23219e+00 4.33220e-01 98 2013 5 2.14486e+00 6.77228e-01 129 2013 6 2.21238e+00 4.19477e-01 97 2013 7 1.23886e+00 3.05523e-01 38 2013 8 1.74557e+00 6.57970e-01 49 2013 9 9.04599e-01 2.02789e-01 12 2013 10 1.50942e+00 2.67494e-01 220 2013 11 1.77932e+00 3.75160e-01 54 2013 12 1.81606e+00 5.43159e-01 272 2014 1 2.16718e+00 4.64174e-01 316 2014 2 2.14971e+00 3.55830e-01 220 2014 3 1.98531e+00 4.32181e-01 256 2014 4 1.88998e+00 5.81944e-01 42 2014 5 1.62415e+00 6.29737e-01 68 2014 6 2.41224e+00 7.30152e-01 24 2014 7 1.77548e+00 6.37226e-01 58 2014 8 1.36052e+00 2.23096e-01 30 2014 9 1.25164e+00 4.89094e-01 15 2014 10 1.72652e+00 2.47265e+00 139 2014 11 1.64973e+00 5.93042e-01 202 2014 12 1.58645e+00 4.84268e-01 176 2015 1 1.74224e+00 2.70731e-01 177 2015 2 1.88448e+00 4.15796e-01 283 2015 3 2.36279e+00 5.66777e-01 176 2015 4 2.05680e+00 6.88875e-01 64 2015 5 1.53962e+00 3.83017e-01 117 2015 6 1.29596e+00 7.04438e-01 43 2015 7 nan nan 0 2015 8 1.45855e+00 4.56441e-01 33 2015 9 nan nan 0 2015 10 1.30579e+00 4.32383e-01 88 2015 11 1.55035e+00 4.10339e-01 119 2015 12 1.41871e+00 2.66496e-01 82 2016 1 1.66099e+00 2.67434e-01 161 2016 2 1.48265e+00 4.74050e-01 244 2016 3 1.97230e+00 3.96259e-01 150 2016 4 2.07078e+00 3.99341e-01 96 2016 5 1.20338e+00 5.50235e-02 9 2016 6 1.97683e+00 5.13112e-01 81 2016 7 2.17243e+00 3.20640e-01 69 2016 8 1.24511e+00 5.17705e-01 125 2016 9 1.43605e+00 5.25285e-01 251 2016 10 8.89079e-01 1.53971e-01 32 2016 11 1.63126e+00 3.18120e-01 160 2016 12 1.64315e+00 4.98141e-01 185 2017 1 2.07552e+00 3.74545e-01 250 2017 2 2.09728e+00 6.56446e-01 354 2017 3 2.48837e+00 8.19339e-01 276 2017 4 1.89686e+00 4.82501e-01 174 2017 5 2.19993e+00 3.81035e-01 76 2017 6 5.92873e-01 3.49278e-01 21 2017 7 8.74746e-01 2.01901e-01 12 2017 8 1.34905e+00 5.36635e-01 62 2017 9 1.53559e+00 3.37426e-01 38 2017 10 1.58589e+00 4.36181e-01 37 2017 11 1.57209e+00 5.02207e-01 177 2017 12 1.89276e+00 4.64081e-01 153 2018 1 1.97318e+00 4.72174e-01 92 2018 2 2.01468e+00 5.53596e-01 199 2018 3 1.91655e+00 4.92168e-01 415 2018 4 1.74836e+00 4.85257e-01 90 2018 5 2.46428e+00 4.00958e-01 4 2018 6 1.52363e+00 4.87760e-01 55 2018 7 1.90137e+00 9.23117e-01 76 2018 8 1.30111e+00 1.09380e+00 24 2018 9 8.13857e-01 2.31718e-01 65 2018 10 1.96367e+00 1.22451e+00 62 2018 11 1.12067e+00 9.80100e-02 5 2018 12 1.67588e+00 5.73586e-01 189 2019 1 2.06050e+00 4.49047e-01 237 2019 2 1.67845e+00 3.49208e-01 195 2019 3 1.46693e+00 4.75541e-01 259 2019 4 1.64278e+00 6.71826e-01 105 2019 5 1.86123e+00 1.17983e+00 124 2019 6 8.12051e-01 2.43407e-01 20 2019 7 1.29815e+00 2.77480e-01 43 2019 8 1.89791e+00 8.81183e-01 14 2019 9 1.74976e+00 2.38390e+00 76 2019 10 1.80818e+00 4.32040e-01 72 2019 11 1.95177e+00 2.64796e-01 172 2019 12 2.02102e+00 2.14292e-01 43 2020 1 2.20543e+00 4.97902e-01 252 2020 2 2.08005e+00 3.90839e-01 196 2020 3 2.40133e+00 8.48242e-01 67 2020 4 1.73884e+00 3.92405e-01 113 2020 5 1.59012e+00 5.96916e-01 107 2020 6 1.56648e+00 7.18322e-01 78 2020 7 nan nan 0 2020 8 2.28310e+00 1.17386e+00 51 2020 9 1.71001e+00 4.51926e-01 80 2020 10 1.82568e+00 5.05553e-01 134 2020 11 1.26053e+00 4.07249e-01 144 2020 12 1.78513e+00 6.53997e-01 211 2021 1 2.31754e+00 6.49964e-01 236 2021 2 2.48416e+00 6.30854e-01 257 2021 3 2.31738e+00 9.24384e-01 115 2021 4 1.67878e+00 8.19816e-01 147 2021 5 2.27534e+00 6.49229e-01 130 2021 6 2.36758e+00 6.11672e-01 58 2021 7 nan nan 0 2021 8 1.03071e+00 0.00000e+00 1 2021 9 1.15061e+00 3.38249e-01 79 2021 10 1.31880e+00 1.67294e+00 118 2021 11 1.22079e+00 4.21016e-01 364 2021 12 1.48690e+00 4.07212e-01 262 2022 1 1.74608e+00 5.69597e-01 328 2022 2 2.02591e+00 6.43878e-01 277 2022 3 2.10290e+00 8.89995e-01 226 2022 4 nan nan 0 2022 5 1.40231e+00 4.38319e-01 114 2022 6 1.46611e+00 6.51141e-02 10 2022 7 2.51400e+00 6.62356e-01 64 2022 8 1.87339e+00 1.01884e+00 29 2022 9 1.12318e+00 2.10152e-01 112 2022 10 2.19355e+00 3.95268e+00 213 2022 11 1.12515e+00 4.34872e-01 45 2022 12 1.23380e+00 2.91837e-01 187 2023 1 1.60081e+00 5.76187e-01 555 2023 2 1.97187e+00 6.89656e-01 548 2023 3 1.55940e+00 4.02905e-01 304 2023 4 1.66451e+00 4.76219e-01 152 2023 5 1.34457e+00 4.36078e-01 175 2023 6 1.17265e+00 4.60189e-01 73 2023 7 2.31834e+00 7.61633e-01 109 2023 8 1.32655e+00 3.07522e-01 75 2023 9 1.45761e+00 4.01689e-01 163 2023 10 1.40274e+00 3.71109e-01 77 2023 11 1.39712e+00 4.80310e-01 356 2023 12 1.69501e+00 3.66377e-01 167 2024 1 1.84831e+00 2.89907e-01 114 2024 2 1.96631e+00 5.40206e-01 418 2024 3 1.93208e+00 6.85489e-01 246 2024 4 2.75481e+00 2.09542e-01 31