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 7.59686e+00 4.47987e+00 208 2002 8 1.36776e+01 4.79726e+00 404 2002 9 9.97563e+00 4.71266e+00 351 2002 10 9.67592e+00 3.02498e+00 79 2002 11 nan nan 0 2002 12 1.10590e+01 8.82467e-01 35 2003 1 7.23720e+00 1.26530e+00 6 2003 2 nan nan 0 2003 3 1.87380e+01 2.40673e+00 42 2003 4 1.54531e+01 6.74325e+00 276 2003 5 1.93106e+01 4.55921e+00 181 2003 6 1.26947e+01 6.54329e+00 244 2003 7 5.96416e+00 3.84983e+00 125 2003 8 1.13258e+01 5.98285e+00 325 2003 9 8.76569e+00 3.76968e+00 233 2003 10 1.15194e+01 5.50462e+00 162 2003 11 9.10021e+00 3.68018e+00 164 2003 12 1.31170e+01 2.66789e+00 130 2004 1 nan nan 0 2004 2 1.55070e+01 9.55801e-01 7 2004 3 1.28582e+01 4.31366e+00 100 2004 4 1.57959e+01 5.63181e+00 241 2004 5 1.42113e+01 6.36910e+00 131 2004 6 9.78399e+00 6.95852e+00 152 2004 7 5.26405e+00 3.33197e+00 101 2004 8 1.02411e+01 3.87848e+00 200 2004 9 6.65916e+00 3.58738e+00 452 2004 10 7.78393e+00 3.09831e+00 178 2004 11 1.17037e+01 3.45278e+00 150 2004 12 1.34921e-01 3.39244e-02 3 2005 1 nan nan 0 2005 2 2.10822e+01 3.42236e+00 34 2005 3 2.26170e+01 5.51337e+00 183 2005 4 2.02762e+01 5.74462e+00 361 2005 5 1.47140e+01 7.64117e+00 196 2005 6 1.07841e+01 6.68068e+00 158 2005 7 1.61888e+01 4.91733e+00 320 2005 8 1.25538e+01 4.98470e+00 262 2005 9 1.09201e+01 4.15646e+00 299 2005 10 1.33225e+01 3.86943e+00 187 2005 11 8.13962e+00 4.81536e+00 137 2005 12 1.84028e+01 2.73002e+00 31 2006 1 1.31972e+01 3.94663e+00 94 2006 2 nan nan 0 2006 3 1.74804e+01 5.89492e+00 338 2006 4 1.74278e+01 5.77867e+00 330 2006 5 8.69954e+00 7.23327e+00 134 2006 6 1.07395e+01 6.24267e+00 273 2006 7 1.98717e+01 5.82247e+00 125 2006 8 1.18784e+01 4.92262e+00 392 2006 9 1.29793e+01 5.06703e+00 133 2006 10 1.17538e+01 5.27501e+00 112 2006 11 1.78915e+01 4.68988e+00 93 2006 12 9.75924e+00 3.70872e+00 36 2007 1 1.58787e+01 2.26208e+00 36 2007 2 8.15115e+00 6.55974e+00 32 2007 3 1.16014e+01 5.42561e+00 185 2007 4 1.13389e+01 6.15974e+00 125 2007 5 1.55750e+01 9.76772e+00 235 2007 6 1.19008e+01 4.79649e+00 348 2007 7 1.64012e+01 4.78617e+00 328 2007 8 1.74479e+01 5.65458e+00 248 2007 9 1.02041e+01 4.93606e+00 393 2007 10 9.55990e+00 4.04477e+00 212 2007 11 1.37448e+01 2.52350e+00 33 2007 12 8.91521e+00 3.10410e+00 78 2008 1 5.45355e+00 3.19059e+00 27 2008 2 2.59527e+01 3.21047e+00 29 2008 3 2.34534e+01 5.24944e+00 127 2008 4 1.36405e+01 8.12661e+00 345 2008 5 1.31402e+01 7.39445e+00 167 2008 6 1.68989e+01 4.32590e+00 61 2008 7 6.33299e+00 6.85664e+00 148 2008 8 1.14147e+01 5.04669e+00 423 2008 9 9.13675e+00 3.49305e+00 349 2008 10 9.14166e+00 2.48043e+00 236 2008 11 1.57210e+01 4.90035e+00 111 2008 12 4.66067e+00 5.13602e+00 9 2009 1 nan nan 0 2009 2 2.68532e+01 4.09943e+00 43 2009 3 1.76648e+01 4.36670e+00 152 2009 4 1.89358e+01 7.68138e+00 369 2009 5 1.07890e+01 9.54205e+00 196 2009 6 1.24964e+01 6.79099e+00 181 2009 7 1.35762e+01 5.17823e+00 156 2009 8 1.73476e+01 7.65664e+00 213 2009 9 1.25132e+01 6.53914e+00 454 2009 10 8.96156e+00 2.89072e+00 72 2009 11 1.10244e+01 4.37006e+00 219 2009 12 nan nan 0 2010 1 1.45295e+01 2.99097e+00 49 2010 2 2.06783e+01 3.61089e+00 79 2010 3 2.29748e+01 4.20779e+00 266 2010 4 1.69535e+01 8.08325e+00 221 2010 5 1.68317e+01 7.03514e+00 395 2010 6 1.49661e+01 4.99471e+00 166 2010 7 1.98373e+01 4.37386e+00 194 2010 8 1.75743e+01 4.58510e+00 200 2010 9 1.22007e+01 4.45616e+00 121 2010 10 1.15628e+01 4.93533e+00 316 2010 11 1.45753e+01 5.32197e+00 209 2010 12 1.38092e+01 4.56700e+00 11 2011 1 1.30550e+01 0.00000e+00 1 2011 2 1.73018e+01 7.84061e+00 56 2011 3 1.10412e+01 4.28079e+00 150 2011 4 1.85524e+01 5.92163e+00 277 2011 5 1.52011e+01 8.38026e+00 199 2011 6 9.49796e+00 7.41298e+00 143 2011 7 7.95772e+00 5.86743e+00 221 2011 8 9.34079e+00 5.98524e+00 381 2011 9 5.40585e+00 3.70102e+00 207 2011 10 7.58205e+00 4.99654e+00 351 2011 11 7.92103e+00 4.38026e+00 109 2011 12 nan nan 0 2012 1 nan nan 0 2012 2 1.99169e+01 3.07633e+00 132 2012 3 1.44820e+01 5.13615e+00 231 2012 4 1.91963e+01 7.19710e+00 338 2012 5 1.86136e+01 8.94994e+00 228 2012 6 1.41981e+01 5.29647e+00 154 2012 7 2.53766e+01 5.29797e+00 218 2012 8 2.16467e+01 7.42926e+00 331 2012 9 1.50830e+01 4.19633e+00 384 2012 10 1.18809e+01 4.92375e+00 166 2012 11 1.73558e+01 2.22456e+00 70 2012 12 1.22277e+01 2.03457e+00 27 2013 1 6.83998e+00 4.31639e+00 83 2013 2 nan nan 0 2013 3 1.61968e+01 6.66710e+00 190 2013 4 1.13679e+01 5.87437e+00 101 2013 5 8.81769e+00 7.47241e+00 148 2013 6 1.42235e+01 9.27133e+00 108 2013 7 1.51372e+01 4.38973e+00 161 2013 8 1.49624e+01 3.62746e+00 206 2013 9 8.90422e+00 3.77849e+00 476 2013 10 8.15268e+00 2.15062e+00 225 2013 11 1.33748e+01 3.09365e+00 78 2013 12 3.79547e-01 1.53029e-01 21 2014 1 nan nan 0 2014 2 nan nan 0 2014 3 2.15895e+01 6.30993e+00 23 2014 4 2.23626e+01 4.76922e+00 198 2014 5 1.41129e+01 1.09795e+01 165 2014 6 8.20989e+00 7.45476e+00 139 2014 7 9.22543e+00 3.57414e+00 100 2014 8 9.88116e+00 5.08641e+00 205 2014 9 9.02870e+00 4.06779e+00 232 2014 10 6.06490e+00 2.77185e+00 163 2014 11 1.62366e-06 0.00000e+00 1 2014 12 1.02769e+01 4.08432e+00 100 2015 1 nan nan 0 2015 2 nan nan 0 2015 3 1.98079e+01 3.89574e+00 80 2015 4 1.34011e+01 5.48677e+00 272 2015 5 1.73905e+01 4.89106e+00 123 2015 6 1.48699e+01 6.88423e+00 214 2015 7 1.39573e+01 5.07132e+00 141 2015 8 1.21098e+01 4.49427e+00 194 2015 9 9.26132e+00 4.37692e+00 294 2015 10 6.48244e+00 1.68377e+00 81 2015 11 7.92585e+00 2.96868e+00 238 2015 12 1.32531e+01 2.36014e+00 67 2016 1 4.60638e+00 5.57929e+00 33 2016 2 nan nan 0 2016 3 6.75498e+00 4.68463e+00 173 2016 4 1.02948e+01 6.10093e+00 243 2016 5 1.79077e+01 8.03922e+00 228 2016 6 9.50259e+00 5.20871e+00 233 2016 7 1.74377e+01 4.04022e+00 253 2016 8 1.69067e+01 4.47046e+00 320 2016 9 1.03790e+01 3.90240e+00 265 2016 10 9.96167e+00 4.04049e+00 149 2016 11 9.19474e+00 2.27002e+00 196 2016 12 9.67447e+00 2.69294e+00 14 2017 1 9.33042e+00 2.71590e+00 74 2017 2 1.49356e+01 3.86803e+00 66 2017 3 1.23991e+01 5.27833e+00 138 2017 4 1.61609e+01 7.62346e+00 299 2017 5 1.79723e+01 5.80445e+00 187 2017 6 1.09817e+01 7.37914e+00 166 2017 7 1.17929e+01 5.16791e+00 308 2017 8 6.37066e+00 8.10232e+00 69 2017 9 1.04531e+01 5.07747e+00 330 2017 10 7.47890e+00 2.60881e+00 260 2017 11 1.07313e+01 2.47075e+00 47 2017 12 nan nan 0 2018 1 nan nan 0 2018 2 8.90623e+00 6.14083e+00 75 2018 3 1.91561e+01 3.68603e+00 395 2018 4 3.12374e+00 4.43072e+00 133 2018 5 1.37378e+01 8.15969e+00 295 2018 6 1.22440e+01 5.19926e+00 221 2018 7 1.60204e+01 4.97608e+00 269 2018 8 1.40237e+01 5.09096e+00 93 2018 9 7.41564e+00 3.36273e+00 284 2018 10 8.36444e+00 4.64103e+00 168 2018 11 nan nan 0 2018 12 nan nan 0 2019 1 1.47017e+01 1.17950e+00 47 2019 2 nan nan 0 2019 3 1.85538e+01 3.29815e+00 216 2019 4 1.68946e+01 6.27508e+00 188 2019 5 2.29087e+01 6.41832e+00 232 2019 6 1.21584e+01 8.56424e+00 245 2019 7 4.65884e+00 4.60860e+00 171 2019 8 7.35565e+00 4.48149e+00 287 2019 9 9.17287e+00 5.62811e+00 125 2019 10 4.86505e+00 3.93732e+00 112 2019 11 nan nan 0 2019 12 4.70456e+00 5.21865e+00 81 2020 1 nan nan 0 2020 2 1.25437e+01 3.06786e+00 89 2020 3 1.16908e+01 4.43055e+00 205 2020 4 1.28209e+01 6.53741e+00 235 2020 5 1.23902e+01 5.98201e+00 232 2020 6 9.55886e+00 5.56153e+00 357 2020 7 1.57269e+01 4.68866e+00 318 2020 8 1.03808e+01 6.63171e+00 117 2020 9 2.80190e+00 3.29782e+00 228 2020 10 7.90057e+00 3.05269e+00 84 2020 11 3.38080e+00 3.03553e+00 200 2020 12 3.30098e+00 7.36253e-01 41 2021 1 8.87688e+00 9.17999e-01 45 2021 2 1.88183e+01 4.40968e+00 51 2021 3 1.48154e+01 3.97422e+00 353 2021 4 1.73943e+01 5.59118e+00 197 2021 5 1.18152e+01 8.08989e+00 198 2021 6 8.79475e+00 5.83395e+00 92 2021 7 1.40937e+01 4.22106e+00 176 2021 8 7.81523e+00 5.06700e+00 141 2021 9 7.51319e+00 4.54550e+00 291 2021 10 4.69369e+00 2.26928e+00 130 2021 11 7.35092e+00 4.02442e+00 84 2021 12 3.80451e+00 3.79089e+00 73 2022 1 1.14039e+01 2.61460e+00 12 2022 2 nan nan 0 2022 3 1.58595e+01 6.62734e+00 104 2022 4 8.55296e+00 7.71770e+00 127 2022 5 1.53233e+01 7.21627e+00 118 2022 6 1.01019e+01 6.05178e+00 197 2022 7 1.66867e+01 6.94329e+00 130 2022 8 1.19056e+01 7.16589e+00 425 2022 9 5.30622e+00 4.76166e+00 344 2022 10 7.74506e+00 4.68400e+00 519 2022 11 1.11651e+01 4.27075e+00 166 2022 12 9.55122e+00 3.66426e+00 48 2023 1 nan nan 0 2023 2 8.50939e+00 3.93195e+00 193 2023 3 1.17604e+01 6.31752e+00 484 2023 4 1.10154e+01 6.69811e+00 358 2023 5 6.14567e+00 6.46821e+00 330 2023 6 1.23180e+01 4.70009e+00 161 2023 7 1.69710e+01 6.44704e+00 342 2023 8 8.61820e+00 4.17152e+00 356 2023 9 6.40902e+00 4.33776e+00 381 2023 10 4.51797e+00 4.59027e+00 212 2023 11 9.77475e+00 4.79280e+00 164 2023 12 nan nan 0 2024 1 nan nan 0 2024 2 1.13361e+01 4.58169e+00 402 2024 3 1.45345e+01 5.37808e+00 205 2024 4 nan nan 0