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 1.90590e+01 8.25948e+00 172 2002 8 2.05970e+01 2.14806e+00 106 2002 9 8.46773e+00 7.92925e+00 96 2002 10 4.89224e+00 4.07674e+00 160 2002 11 5.17596e+00 2.27155e+00 200 2002 12 1.95743e+00 1.41139e+00 128 2003 1 7.69607e-01 9.69714e-01 248 2003 2 4.36102e+00 2.46029e+00 176 2003 3 5.19027e+00 3.13254e+00 144 2003 4 3.16957e+00 2.43299e+00 144 2003 5 2.43987e+00 7.65501e-01 29 2003 6 5.35426e+00 9.37187e-01 30 2003 7 1.72965e+00 2.07704e+00 48 2003 8 7.07928e+00 4.26522e+00 105 2003 9 1.03389e+01 4.56166e+00 144 2003 10 1.29689e+01 5.57315e+00 208 2003 11 1.24340e+01 2.89485e+00 288 2003 12 4.97009e+00 2.80204e+00 208 2004 1 1.26701e+01 2.99511e+00 126 2004 2 9.39966e+00 4.24746e+00 84 2004 3 9.73894e+00 3.33677e+00 224 2004 4 7.95003e+00 4.74884e+00 144 2004 5 1.58951e+01 7.03871e+00 128 2004 6 3.91416e+00 9.89770e-01 64 2004 7 3.18528e+00 2.13382e+00 64 2004 8 8.63550e+00 5.12760e+00 139 2004 9 6.40997e+00 6.65008e+00 176 2004 10 5.98401e+00 5.45093e+00 112 2004 11 3.97963e+00 2.48793e+00 129 2004 12 1.63013e+00 8.47894e-01 158 2005 1 5.23635e+00 2.89067e+00 144 2005 2 6.61429e+00 2.09305e+00 80 2005 3 8.20179e+00 3.92461e+00 144 2005 4 2.23037e+00 2.52327e+00 134 2005 5 9.10829e+00 5.78240e+00 128 2005 6 7.03918e+00 5.22531e+00 191 2005 7 7.29395e+00 5.41848e+00 150 2005 8 8.04964e+00 7.13774e+00 80 2005 9 9.46427e+00 5.80719e+00 155 2005 10 6.36912e+00 3.41303e+00 334 2005 11 1.12987e+01 4.51082e+00 208 2005 12 9.08066e+00 3.13279e+00 128 2006 1 7.67524e+00 4.27594e+00 160 2006 2 4.24954e+00 2.04672e+00 176 2006 3 1.32340e+01 4.61425e+00 253 2006 4 1.09165e+01 7.72753e+00 192 2006 5 6.85388e+00 4.10195e+00 208 2006 6 9.77031e+00 5.66662e+00 151 2006 7 2.60328e+01 2.54097e+00 64 2006 8 1.67621e+01 4.33274e+00 160 2006 9 1.38091e+01 3.16818e+00 176 2006 10 9.94028e+00 4.36443e+00 222 2006 11 8.03208e+00 3.26621e+00 253 2006 12 1.07060e+01 5.64781e+00 176 2007 1 8.27780e+00 3.31764e+00 93 2007 2 9.09850e+00 3.40807e+00 112 2007 3 1.54103e+01 3.85937e+00 213 2007 4 1.31060e+01 4.56929e+00 176 2007 5 1.96141e+01 2.57110e+00 105 2007 6 1.47191e+01 3.56449e+00 91 2007 7 1.06912e+01 6.95221e+00 80 2007 8 1.92451e+01 4.04457e+00 48 2007 9 1.52048e+01 5.68760e+00 144 2007 10 7.10711e+00 4.09322e+00 208 2007 11 9.59123e+00 3.27051e+00 224 2007 12 1.21580e+01 4.05001e+00 128 2008 1 7.92685e+00 3.31896e+00 144 2008 2 7.58809e+00 4.45975e+00 256 2008 3 1.60994e+00 1.52430e+00 170 2008 4 6.25295e+00 1.67335e+00 128 2008 5 3.72823e+00 3.19405e+00 112 2008 6 2.68921e+00 3.57316e+00 176 2008 7 5.81030e+00 2.85028e+00 57 2008 8 5.85956e+00 4.21113e+00 176 2008 9 9.75253e+00 5.26403e+00 224 2008 10 1.28076e+01 3.86234e+00 208 2008 11 1.86724e+01 3.60402e+00 281 2008 12 1.09013e+01 5.73911e+00 160 2009 1 8.42630e+00 5.25956e+00 160 2009 2 2.41709e+00 1.37209e+00 128 2009 3 5.55703e+00 4.48814e+00 144 2009 4 1.14147e+00 2.47445e+00 112 2009 5 7.10316e+00 4.82492e+00 65 2009 6 2.56314e+00 2.06471e+00 129 2009 7 1.59353e+01 4.22784e+00 94 2009 8 1.38378e+01 5.01612e+00 161 2009 9 1.54320e+01 3.79627e+00 96 2009 10 6.92172e+00 4.70070e+00 161 2009 11 5.17924e+00 3.03267e+00 161 2009 12 5.13962e+00 3.85660e+00 80 2010 1 3.46887e+00 2.95991e+00 208 2010 2 4.69612e-01 1.23973e+00 144 2010 3 7.21893e-01 1.03556e+00 144 2010 4 9.46900e-01 7.21474e-01 144 2010 5 4.87685e+00 2.50582e+00 154 2010 6 1.24075e+00 1.08261e+00 157 2010 7 8.08996e+00 5.19262e+00 112 2010 8 5.97398e+00 2.68126e+00 80 2010 9 8.46848e+00 3.75024e+00 221 2010 10 1.21120e+01 5.42720e+00 335 2010 11 5.72299e+00 2.10852e+00 208 2010 12 3.00205e+00 1.67781e+00 224 2011 1 2.80575e+00 2.18381e+00 214 2011 2 3.38066e+00 1.92584e+00 176 2011 3 5.61022e+00 3.68301e+00 196 2011 4 2.73566e+00 1.75581e+00 96 2011 5 4.31576e+00 4.33690e+00 196 2011 6 1.70123e+00 1.78803e+00 144 2011 7 5.38632e+00 2.98266e+00 144 2011 8 3.78623e+00 3.47991e+00 158 2011 9 7.01818e+00 5.31637e+00 180 2011 10 1.02649e+01 3.16688e+00 320 2011 11 1.02965e+01 2.85956e+00 144 2011 12 9.84064e+00 1.11723e+00 86 2012 1 6.60190e+00 2.81342e+00 197 2012 2 5.81999e+00 1.57329e+00 48 2012 3 1.29722e+01 6.45137e+00 208 2012 4 1.56041e+01 5.58271e+00 176 2012 5 1.53636e+01 4.44018e+00 160 2012 6 1.22861e+01 5.09815e+00 128 2012 7 1.72759e+01 4.53451e+00 84 2012 8 1.09686e+01 5.58642e+00 100 2012 9 1.06295e+01 6.21587e+00 200 2012 10 1.22887e+01 4.29473e+00 317 2012 11 8.11349e+00 2.36214e+00 288 2012 12 1.33348e+01 2.20966e+00 128 2013 1 1.30124e+01 4.09160e+00 144 2013 2 1.18422e+01 2.93411e+00 117 2013 3 5.83086e-01 8.49086e-01 224 2013 4 1.40776e+01 8.78225e+00 81 2013 5 9.76512e+00 1.84833e+00 138 2013 6 2.08309e+01 6.46548e+00 67 2013 7 8.24204e+00 4.25435e+00 128 2013 8 3.38033e+00 2.07278e+00 76 2013 9 8.53950e+00 5.05496e+00 234 2013 10 1.20105e+01 4.19482e+00 176 2013 11 8.56355e+00 3.38029e+00 160 2013 12 1.57198e+01 2.81269e+00 128 2014 1 9.75045e+00 5.90734e+00 144 2014 2 6.81489e+00 3.36993e+00 176 2014 3 7.41371e+00 3.04757e+00 144 2014 4 7.15882e+00 6.67199e+00 112 2014 5 1.47216e+00 2.27592e+00 128 2014 6 2.73651e+00 2.93627e+00 112 2014 7 6.73323e+00 4.99701e+00 128 2014 8 8.73216e+00 7.45942e+00 144 2014 9 1.97415e+01 3.46198e+00 144 2014 10 1.09828e+01 2.77926e+00 331 2014 11 8.78403e+00 2.26825e+00 208 2014 12 1.05817e+01 2.88540e+00 178 2015 1 7.98319e+00 4.17521e+00 181 2015 2 1.12222e+01 3.24761e+00 192 2015 3 1.34278e+01 2.08499e+00 129 2015 4 1.29689e+01 1.79134e+00 80 2015 5 1.75932e+01 7.14779e+00 191 2015 6 1.62657e+01 5.08040e+00 146 2015 7 4.53696e+00 4.15916e+00 140 2015 8 1.18052e+01 6.42231e+00 185 2015 9 1.85118e+01 2.39908e+00 176 2015 10 1.08461e+01 2.02730e+00 160 2015 11 2.87400e+00 2.16643e+00 160 2015 12 9.22991e+00 2.75719e+00 143 2016 1 8.04553e+00 5.92726e+00 192 2016 2 1.01241e+00 1.31401e+00 256 2016 3 7.24982e-01 6.52889e-01 112 2016 4 2.87919e+00 3.79208e+00 159 2016 5 5.01693e+00 4.32850e+00 176 2016 6 1.37510e+00 2.35651e+00 96 2016 7 2.22372e+00 2.43707e+00 128 2016 8 1.11943e+01 3.39797e+00 148 2016 9 1.29105e+01 3.71626e+00 180 2016 10 1.37144e+01 3.70001e+00 287 2016 11 1.18035e+01 3.51886e+00 176 2016 12 1.03960e+01 2.39295e+00 166 2017 1 3.17659e+00 3.14540e+00 176 2017 2 3.11779e+00 1.98932e+00 224 2017 3 7.52355e+00 5.36590e+00 167 2017 4 8.42442e+00 5.33117e+00 144 2017 5 3.13741e+00 3.79630e+00 192 2017 6 8.39730e+00 2.20613e+00 96 2017 7 9.16278e-01 1.50650e+00 160 2017 8 1.27718e+00 2.32938e+00 88 2017 9 7.65093e+00 5.25151e+00 208 2017 10 4.23586e+00 1.82101e+00 215 2017 11 1.33442e+01 4.84245e+00 240 2017 12 1.10374e+01 2.82767e+00 192 2018 1 6.14740e+00 3.25498e+00 224 2018 2 1.72747e+01 5.18931e+00 112 2018 3 1.33057e+01 6.95386e+00 214 2018 4 1.11689e+01 6.10982e+00 221 2018 5 4.29357e+00 3.57636e+00 156 2018 6 5.14929e+00 4.96311e+00 125 2018 7 6.20208e+00 1.60222e+00 96 2018 8 7.31695e+00 2.19797e+00 65 2018 9 7.10769e+00 3.55111e+00 198 2018 10 9.97551e+00 7.07783e+00 224 2018 11 3.74856e+00 2.80277e+00 96 2018 12 1.10452e+00 9.60456e-01 101 2019 1 1.80799e-01 3.82317e-01 169 2019 2 1.99265e+00 1.85105e+00 64 2019 3 7.13881e+00 2.88351e+00 208 2019 4 7.89924e+00 1.97908e+00 144 2019 5 3.93581e+00 4.05544e+00 192 2019 6 9.14678e-01 1.02134e+00 64 2019 7 1.81411e+00 2.93217e+00 104 2019 8 2.90162e+00 3.07221e+00 112 2019 9 4.85684e+00 3.23479e+00 272 2019 10 8.88893e+00 1.99279e+00 144 2019 11 1.10834e+01 3.50421e+00 176 2019 12 1.02928e+01 1.75918e+00 145 2020 1 9.81387e+00 1.77288e+00 128 2020 2 7.35104e+00 5.55226e+00 130 2020 3 3.54021e+00 5.56543e+00 139 2020 4 1.65514e+00 1.91721e+00 144 2020 5 2.29848e+00 3.34531e+00 128 2020 6 1.31170e+01 4.37587e+00 112 2020 7 4.83047e+00 4.15535e+00 80 2020 8 4.26614e+00 3.09069e+00 112 2020 9 5.67843e+00 4.64788e+00 126 2020 10 5.64402e+00 4.87107e+00 179 2020 11 8.79078e+00 6.20925e+00 208 2020 12 1.02522e+01 4.91584e+00 208 2021 1 6.30649e+00 1.68242e+00 192 2021 2 6.21006e+00 3.21799e+00 128 2021 3 1.41561e+01 3.02472e+00 117 2021 4 1.92414e+01 6.60523e+00 176 2021 5 1.15031e+01 5.06299e+00 88 2021 6 6.58638e+00 5.50634e+00 64 2021 7 1.71613e+00 2.28901e+00 96 2021 8 3.20613e+00 3.62774e+00 125 2021 9 4.39108e+00 4.60426e+00 128 2021 10 6.28061e+00 3.21496e+00 153 2021 11 4.33349e+00 3.69840e+00 227 2021 12 1.12317e+01 1.60435e+00 160 2022 1 5.19061e+00 3.36230e+00 192 2022 2 9.15813e+00 5.69662e+00 201 2022 3 1.13962e+01 3.79332e+00 212 2022 4 1.52112e+01 5.70598e+00 81 2022 5 1.09610e+01 2.54717e+00 128 2022 6 9.41953e+00 4.02997e+00 177 2022 7 1.23560e+01 7.50923e+00 128 2022 8 4.77437e+00 6.16714e-01 119 2022 9 1.08644e+01 2.81883e+00 240 2022 10 1.30792e+01 3.35115e+00 278 2022 11 9.53585e+00 2.53820e+00 204 2022 12 1.25259e+01 4.79539e+00 144 2023 1 1.02076e+01 3.81206e+00 234 2023 2 6.54237e+00 2.74861e+00 160 2023 3 4.28475e+00 2.73959e+00 55 2023 4 8.61096e+00 3.87020e+00 43 2023 5 2.21457e+01 8.65145e+00 160 2023 6 1.66907e+01 6.83983e+00 128 2023 7 3.60762e+00 2.28885e+00 160 2023 8 6.64411e+00 4.42637e+00 224 2023 9 5.69964e+00 3.23495e+00 202 2023 10 7.97226e+00 2.44140e+00 213 2023 11 6.43038e+00 2.20992e+00 160 2023 12 8.64018e+00 1.24570e+00 129 2024 1 7.71897e+00 2.81483e+00 96 2024 2 5.11323e+00 1.75504e+00 91 2024 3 6.93931e+00 3.47229e+00 80 2024 4 5.99825e+00 1.81422e+00 32