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 1.93162e+01 3.11650e+00 74 2002 8 1.95598e+01 2.77585e+00 96 2002 9 9.15119e+00 4.09737e+00 144 2002 10 1.12591e+01 2.85029e+00 224 2002 11 5.49361e+00 2.35431e+00 224 2002 12 7.77467e+00 1.52575e+00 146 2003 1 8.84209e+00 2.77360e+00 240 2003 2 1.16331e+01 4.12025e+00 176 2003 3 2.09038e+01 6.90447e+00 112 2003 4 6.33429e+00 4.12168e+00 195 2003 5 8.23575e+00 4.65080e+00 112 2003 6 9.96445e+00 5.46963e+00 48 2003 7 1.61438e+01 5.73854e+00 67 2003 8 6.00913e+00 3.37715e+00 142 2003 9 5.11420e+00 2.69741e+00 150 2003 10 7.11218e+00 4.08563e+00 239 2003 11 7.80433e+00 3.62154e+00 263 2003 12 7.19661e+00 4.71830e+00 240 2004 1 1.74474e+01 3.25067e+00 208 2004 2 1.44678e+01 3.84959e+00 80 2004 3 2.99615e+01 3.07737e+00 240 2004 4 2.45562e+01 6.77040e+00 144 2004 5 2.24081e+01 4.01737e+00 192 2004 6 2.19580e+01 2.43150e+00 130 2004 7 1.42059e+01 4.25374e+00 79 2004 8 1.88338e+01 4.11769e+00 151 2004 9 9.51607e+00 5.96563e+00 144 2004 10 4.23122e+00 3.80670e+00 142 2004 11 3.16311e+00 5.78344e+00 151 2004 12 8.26796e+00 6.07145e+00 144 2005 1 1.09866e+01 4.06879e+00 192 2005 2 1.03955e+01 4.53831e+00 148 2005 3 6.41446e+00 2.98379e+00 137 2005 4 9.89254e+00 4.76984e+00 208 2005 5 1.01112e+01 5.08071e+00 130 2005 6 1.09425e+01 5.74699e+00 129 2005 7 1.57989e+01 7.23016e+00 99 2005 8 2.73125e+00 2.21357e+00 104 2005 9 1.10924e+00 1.36692e+00 126 2005 10 4.16889e+00 3.39751e+00 267 2005 11 1.20531e+01 4.44550e+00 256 2005 12 1.29678e+01 5.48774e+00 240 2006 1 1.43709e+01 7.56056e+00 224 2006 2 1.30944e+01 7.31771e+00 192 2006 3 1.96633e+01 9.40528e+00 264 2006 4 2.99231e+01 2.46876e+00 192 2006 5 2.53180e+01 3.13369e+00 177 2006 6 2.37845e+01 6.80810e+00 144 2006 7 2.39068e+01 3.05117e+00 128 2006 8 2.01779e+01 4.49675e+00 118 2006 9 1.31675e+01 2.99170e+00 160 2006 10 1.40677e+01 4.20318e+00 272 2006 11 1.48038e+01 5.40163e+00 208 2006 12 1.11671e+01 7.23853e+00 144 2007 1 1.80909e+01 6.11903e+00 144 2007 2 2.33443e+01 8.00227e+00 187 2007 3 3.21297e+01 2.81168e+00 320 2007 4 2.13429e+01 8.90719e+00 176 2007 5 2.45698e+01 2.87795e+00 144 2007 6 2.14113e+01 1.91643e+00 170 2007 7 1.73796e+01 6.08762e+00 128 2007 8 1.23695e+01 3.41413e+00 128 2007 9 1.68171e+01 3.49607e+00 147 2007 10 1.73576e+01 2.44568e+00 192 2007 11 1.76533e+01 2.77623e+00 284 2007 12 1.54889e+01 6.21342e+00 208 2008 1 1.96088e+01 7.59905e+00 211 2008 2 2.55672e+01 5.35681e+00 256 2008 3 1.51434e+01 8.60502e+00 192 2008 4 2.64204e+01 4.09004e+00 236 2008 5 1.65096e+01 5.18940e+00 160 2008 6 1.77059e+01 3.88740e+00 149 2008 7 1.89153e+01 3.69409e+00 128 2008 8 1.67879e+01 5.60301e+00 80 2008 9 1.63189e+01 3.46800e+00 192 2008 10 1.46958e+01 3.04663e+00 241 2008 11 9.32150e+00 4.50279e+00 248 2008 12 8.38419e+00 4.89879e+00 224 2009 1 1.30670e+01 5.62132e+00 240 2009 2 1.87051e+01 5.58427e+00 256 2009 3 2.03191e+01 7.20006e+00 272 2009 4 2.83818e+01 6.41996e+00 185 2009 5 1.62478e+01 7.17657e+00 130 2009 6 2.08263e+01 7.29974e+00 139 2009 7 2.06543e+01 2.19009e+00 96 2009 8 1.63749e+01 4.12309e+00 172 2009 9 1.86322e+01 3.44828e+00 215 2009 10 1.37095e+01 3.24937e+00 208 2009 11 9.34107e+00 2.93731e+00 146 2009 12 9.97093e+00 4.47158e+00 80 2010 1 1.05839e+01 5.08904e+00 208 2010 2 5.26959e+00 2.07828e+00 144 2010 3 5.38416e+00 2.69765e+00 247 2010 4 8.45936e+00 6.22945e+00 158 2010 5 2.22608e+01 4.61649e+00 176 2010 6 2.22622e+01 5.68037e+00 162 2010 7 1.93007e+01 5.27952e+00 144 2010 8 1.47291e+01 3.07400e+00 71 2010 9 1.92073e+01 3.14800e+00 233 2010 10 2.03082e+01 3.84821e+00 400 2010 11 1.79749e+01 3.53768e+00 320 2010 12 1.10285e+01 5.26056e+00 256 2011 1 1.24541e+01 2.77790e+00 168 2011 2 1.64355e+01 3.37804e+00 176 2011 3 2.74165e+01 5.65989e+00 192 2011 4 2.71602e+01 2.46732e+00 260 2011 5 2.00938e+01 3.94197e+00 240 2011 6 1.74338e+01 2.14075e+00 96 2011 7 1.80103e+01 5.25418e+00 96 2011 8 1.99315e+01 3.14912e+00 112 2011 9 1.22665e+01 7.05527e+00 193 2011 10 1.27632e+01 3.79865e+00 247 2011 11 1.45515e+01 3.49954e+00 304 2011 12 1.39736e+01 5.09212e+00 282 2012 1 1.38226e+01 5.19812e+00 256 2012 2 2.34498e+01 4.92504e+00 26 2012 3 2.87477e+01 5.33719e+00 226 2012 4 2.60560e+01 4.89204e+00 256 2012 5 1.66620e+01 3.17358e+00 160 2012 6 1.11628e+01 6.00654e+00 80 2012 7 1.25867e+01 9.21993e+00 111 2012 8 4.63334e+00 5.22412e+00 123 2012 9 9.03437e+00 5.60490e+00 143 2012 10 7.78893e+00 6.14865e+00 222 2012 11 9.30030e+00 1.63812e+00 240 2012 12 7.25302e+00 5.19347e+00 144 2013 1 1.08306e+01 6.20285e+00 172 2013 2 1.79010e+01 5.28854e+00 162 2013 3 1.77092e+01 5.59011e+00 218 2013 4 2.80846e+01 3.34871e+00 144 2013 5 1.83950e+01 3.51023e+00 106 2013 6 1.27843e+01 7.31811e+00 93 2013 7 1.17108e+01 6.82412e+00 65 2013 8 1.06103e+01 5.03566e+00 188 2013 9 6.51932e+00 7.48783e+00 149 2013 10 5.58148e+00 3.62012e+00 196 2013 11 6.09772e+00 5.41182e+00 110 2013 12 1.68723e+01 2.17007e+00 192 2014 1 1.31260e+01 2.92047e+00 144 2014 2 9.27393e+00 5.00237e+00 160 2014 3 5.33665e+00 3.77251e+00 182 2014 4 1.15807e+01 5.12949e+00 150 2014 5 8.01399e+00 5.66806e+00 163 2014 6 1.15949e+01 8.19423e+00 160 2014 7 1.55267e+01 3.78464e+00 129 2014 8 9.57050e+00 8.38089e+00 144 2014 9 8.31249e+00 5.08111e+00 111 2014 10 7.25431e+00 4.16911e+00 320 2014 11 5.74594e+00 3.08365e+00 258 2014 12 1.45323e+01 4.88922e+00 184 2015 1 7.20316e+00 7.69338e+00 160 2015 2 1.56134e+01 5.93748e+00 200 2015 3 1.82509e+01 5.55999e+00 144 2015 4 2.40020e+01 6.96894e+00 112 2015 5 2.63429e+01 5.18823e+00 206 2015 6 2.17508e+01 3.96823e+00 144 2015 7 1.93476e+01 4.41753e+00 125 2015 8 1.76282e+01 3.74007e+00 112 2015 9 1.26280e+01 4.39440e+00 64 2015 10 9.93405e+00 2.69091e+00 223 2015 11 1.26365e+01 4.04126e+00 233 2015 12 1.93408e+01 3.42921e+00 114 2016 1 8.55622e+00 4.44665e+00 160 2016 2 7.50739e+00 5.66666e+00 304 2016 3 1.31093e+01 3.60283e+00 144 2016 4 2.08508e+01 7.47891e+00 176 2016 5 1.44855e+01 6.53061e+00 208 2016 6 1.93587e+01 2.71780e+00 115 2016 7 2.13702e+01 2.39504e+00 224 2016 8 1.74561e+01 4.21655e+00 220 2016 9 1.75661e+01 5.30407e+00 176 2016 10 1.66798e+01 4.46324e+00 251 2016 11 2.10025e+01 2.82676e+00 240 2016 12 2.12215e+01 1.94809e+00 218 2017 1 1.14969e+01 8.05692e+00 176 2017 2 1.12980e+01 5.47497e+00 208 2017 3 2.39417e+01 4.01362e+00 241 2017 4 2.76560e+01 4.00366e+00 228 2017 5 1.50361e+01 5.10998e+00 176 2017 6 1.89029e+01 3.95646e+00 64 2017 7 1.94369e+01 2.05752e+00 45 2017 8 8.71662e+00 5.36619e+00 128 2017 9 9.46038e+00 3.34904e+00 199 2017 10 4.59257e+00 2.70471e+00 244 2017 11 1.67950e+01 2.58061e+00 304 2017 12 1.56662e+01 6.15355e+00 191 2018 1 1.83060e+01 5.69598e+00 199 2018 2 2.91854e+01 3.09694e+00 139 2018 3 2.82792e+01 3.60470e+00 240 2018 4 2.72577e+01 6.17864e+00 160 2018 5 2.44148e+01 2.43920e+00 117 2018 6 1.62511e+01 4.57022e+00 128 2018 7 2.25433e+01 2.40543e+00 105 2018 8 1.28120e+01 4.00302e+00 112 2018 9 1.86241e+01 2.68334e+00 208 2018 10 1.28522e+01 5.85752e+00 319 2018 11 7.05580e+00 3.50381e+00 96 2018 12 6.99161e+00 4.97069e+00 160 2019 1 3.33353e+00 5.52440e+00 226 2019 2 6.64328e+00 3.77487e+00 127 2019 3 5.01911e+00 4.79310e+00 224 2019 4 8.72736e+00 3.61948e+00 118 2019 5 2.31352e+01 2.93851e+00 224 2019 6 1.80802e+01 3.10308e+00 96 2019 7 1.76100e+01 3.90462e+00 64 2019 8 1.51163e+01 3.36727e+00 176 2019 9 1.57260e+01 2.77281e+00 320 2019 10 1.36881e+01 5.39673e+00 201 2019 11 1.30701e+01 3.08879e+00 160 2019 12 1.30594e+01 5.98515e+00 156 2020 1 2.48750e+01 7.54964e+00 208 2020 2 1.36150e+01 7.28231e+00 144 2020 3 2.71976e+01 3.38165e+00 256 2020 4 1.08498e+01 4.51256e+00 144 2020 5 2.07753e+01 2.46521e+00 176 2020 6 2.05886e+01 4.65575e+00 160 2020 7 2.16602e+01 3.55981e+00 131 2020 8 6.10100e-01 5.16314e-02 4 2020 9 9.84918e+00 5.20408e+00 96 2020 10 1.00235e+01 3.41365e+00 228 2020 11 1.23977e+01 8.06602e+00 277 2020 12 1.43824e+01 5.63404e+00 240 2021 1 1.16709e+01 5.06139e+00 144 2021 2 1.71875e+01 9.11646e+00 128 2021 3 7.16813e+00 6.17795e+00 156 2021 4 9.34744e+00 6.14390e+00 231 2021 5 1.97491e+01 4.18169e+00 222 2021 6 2.01245e+01 3.78439e+00 70 2021 7 1.39981e+01 5.48830e+00 144 2021 8 9.85414e+00 6.57862e+00 143 2021 9 3.46257e+00 2.49217e+00 98 2021 10 2.60674e+00 3.68079e+00 199 2021 11 3.54915e+00 3.13126e+00 240 2021 12 1.23180e+01 4.04002e+00 192 2022 1 8.34320e+00 5.22116e+00 249 2022 2 1.50351e+01 4.42439e+00 208 2022 3 9.79781e+00 4.69973e+00 208 2022 4 1.09445e+01 3.27926e+00 75 2022 5 1.70477e+01 7.67028e+00 162 2022 6 2.70788e+01 2.73150e+00 160 2022 7 1.63294e+01 3.69515e+00 64 2022 8 2.19391e+01 5.89753e+00 101 2022 9 1.38968e+01 3.27953e+00 112 2022 10 1.50169e+01 4.44784e+00 304 2022 11 1.39629e+01 3.79758e+00 124 2022 12 1.32906e+01 6.53672e+00 176 2023 1 2.19630e+01 6.29209e+00 210 2023 2 2.00023e+01 1.11606e+01 160 2023 3 2.84686e+01 2.36903e+00 146 2023 4 2.91323e+01 3.46149e+00 96 2023 5 1.92153e+01 7.24940e+00 160 2023 6 1.49498e+01 1.55164e+00 96 2023 7 2.14858e+01 3.72785e+00 128 2023 8 1.82160e+01 5.62791e+00 222 2023 9 9.75155e+00 3.10155e+00 96 2023 10 1.03800e+01 5.41388e+00 192 2023 11 1.28144e+01 3.21446e+00 192 2023 12 1.03332e+01 3.00730e+00 81 2024 1 1.26919e+01 4.36804e+00 128 2024 2 1.00019e+01 9.75591e+00 178 2024 3 1.32237e+01 4.21098e+00 127 2024 4 nan nan 0