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 1.82547e+00 1.77795e-01 79 2002 8 2.01359e+00 6.67772e-01 140 2002 9 2.34015e+00 6.52652e-01 160 2002 10 3.09477e+00 2.16563e+00 224 2002 11 2.71133e+00 7.17756e-01 215 2002 12 4.45176e+00 1.14032e+00 218 2003 1 3.80542e+00 1.53375e+00 288 2003 2 2.29553e+00 5.25205e-01 164 2003 3 2.62667e+01 2.15123e+01 48 2003 4 6.31507e+00 6.57249e+00 128 2003 5 8.24843e+00 4.42690e+00 76 2003 6 3.27481e+00 2.29212e+00 95 2003 7 4.70158e+00 2.70668e+00 32 2003 8 1.10730e+01 1.11187e+01 108 2003 9 3.59408e+00 2.08609e+00 160 2003 10 3.02409e+00 1.29726e+00 254 2003 11 3.41998e+00 1.75862e+00 304 2003 12 3.37525e+00 1.38324e+00 256 2004 1 2.89176e+00 8.34704e-01 167 2004 2 2.08771e+00 5.26639e-01 80 2004 3 3.86085e+00 2.25341e+00 203 2004 4 3.64418e+00 1.89429e+00 175 2004 5 2.75201e+00 6.97561e-01 171 2004 6 2.94754e+00 2.61708e+00 119 2004 7 7.99134e+00 7.90709e+00 69 2004 8 2.19489e+00 7.65853e-01 160 2004 9 3.37365e+00 9.97003e-01 121 2004 10 7.15413e+00 1.62613e+00 96 2004 11 9.76366e+00 8.55869e+00 186 2004 12 9.24734e+00 4.59810e+00 132 2005 1 5.61403e+00 3.83773e+00 224 2005 2 9.04175e+00 6.58619e+00 142 2005 3 4.73896e+00 1.43564e+00 192 2005 4 9.60936e+00 1.84989e+01 85 2005 5 4.74707e+00 7.24517e+00 204 2005 6 5.38479e+00 4.76480e+00 122 2005 7 2.57068e+00 3.77849e+00 52 2005 8 1.60189e+00 4.16684e-01 29 2005 9 4.53706e+00 1.94832e+00 112 2005 10 5.27248e+00 3.31786e+00 288 2005 11 2.45086e+00 5.17466e-01 320 2005 12 1.93542e+00 3.56707e-01 224 2006 1 2.21759e+00 4.46931e-01 204 2006 2 2.79861e+00 6.25520e-01 192 2006 3 5.64817e+00 1.91002e+00 256 2006 4 3.59200e+00 2.81254e+00 205 2006 5 1.54373e+00 4.12313e-01 188 2006 6 1.79421e+00 3.97805e-01 98 2006 7 1.78141e+00 3.98593e-01 114 2006 8 1.74094e+00 8.63983e-01 158 2006 9 2.64002e+00 7.57257e-01 176 2006 10 2.24436e+00 6.93103e-01 272 2006 11 2.11821e+00 1.65788e+00 256 2006 12 1.79996e+00 5.07086e-01 144 2007 1 1.31412e+00 3.31789e-01 160 2007 2 2.00346e+00 1.05169e+00 240 2007 3 1.78959e+00 5.09252e-01 288 2007 4 1.41067e+00 2.12840e-01 212 2007 5 1.33750e+00 2.50495e-01 128 2007 6 1.67756e+00 3.87262e-01 128 2007 7 2.82246e+00 1.13978e+00 143 2007 8 3.12284e+00 1.14404e+00 128 2007 9 2.27085e+00 9.72518e-01 154 2007 10 1.42859e+00 2.37940e-01 152 2007 11 1.19633e+00 1.78435e-01 304 2007 12 1.21334e+00 3.03784e-01 160 2008 1 9.21915e-01 2.22209e-01 240 2008 2 8.52378e-01 1.70728e-01 288 2008 3 2.04941e+00 6.33608e-01 208 2008 4 4.07033e+00 2.46255e+00 198 2008 5 3.08799e+00 9.39238e-01 208 2008 6 2.01768e+00 6.93960e-01 158 2008 7 1.74259e+00 3.97462e-01 82 2008 8 2.39321e+00 1.59619e+00 80 2008 9 3.24757e+00 1.57685e+00 214 2008 10 2.77491e+00 1.05327e+00 302 2008 11 7.50008e+00 1.78115e+01 269 2008 12 6.30784e+00 6.28417e+00 240 2009 1 4.24238e+00 1.85685e+00 154 2009 2 3.47947e+00 1.12042e+00 224 2009 3 1.57243e+00 2.85569e-01 249 2009 4 9.18292e+00 1.36070e+01 151 2009 5 4.94898e+00 3.30967e+00 142 2009 6 1.96604e+00 6.75788e-01 112 2009 7 1.97754e+00 5.94211e-01 96 2009 8 3.92835e+00 1.59808e+00 128 2009 9 3.12167e+00 2.38175e+00 236 2009 10 3.07399e+00 1.12326e+00 216 2009 11 3.26762e+00 9.90587e-01 208 2009 12 5.30624e+00 1.05866e+00 48 2010 1 7.65089e+00 4.42883e+00 208 2010 2 9.49048e+00 8.21097e+00 240 2010 3 5.66951e+00 4.06646e+00 231 2010 4 1.27652e+01 1.50412e+01 212 2010 5 7.09794e+00 9.93140e+00 176 2010 6 4.96488e+00 6.91680e+00 197 2010 7 3.33784e+00 1.79451e+00 80 2010 8 2.27801e+00 2.03429e-01 81 2010 9 3.67704e+00 6.93029e+00 207 2010 10 2.35530e+00 1.55222e+00 384 2010 11 1.41682e+00 3.36508e-01 317 2010 12 1.59205e+00 2.98586e-01 288 2011 1 1.46395e+00 2.05500e-01 176 2011 2 1.30240e+00 2.13889e-01 160 2011 3 1.54176e+00 2.53389e-01 208 2011 4 2.33522e+00 1.36850e+00 233 2011 5 1.87612e+00 9.26081e-01 222 2011 6 1.69429e+00 3.07202e-01 119 2011 7 2.35194e+00 1.07166e+00 99 2011 8 2.23756e+00 7.38440e-01 140 2011 9 1.78977e+00 4.89390e-01 214 2011 10 1.74376e+00 3.73614e-01 287 2011 11 1.08967e+00 2.15954e-01 288 2011 12 1.00591e+00 1.88217e-01 284 2012 1 1.29814e+00 3.48362e-01 261 2012 2 1.18129e+00 7.02068e-02 48 2012 3 9.38924e-01 2.11783e-01 256 2012 4 1.51539e+00 2.51986e-01 240 2012 5 1.45900e+00 2.22953e-01 147 2012 6 2.87645e+00 2.67757e+00 110 2012 7 6.88300e+00 8.19583e+00 130 2012 8 4.11268e+00 2.17532e+00 96 2012 9 4.93699e+00 6.10787e+00 155 2012 10 5.23126e+00 4.63345e+00 243 2012 11 4.50003e+00 2.57452e+00 280 2012 12 3.42400e+00 2.96135e-01 137 2013 1 1.96243e+00 3.58379e-01 144 2013 2 1.85892e+00 2.15806e-01 160 2013 3 7.13684e+00 3.88742e+00 240 2013 4 5.22730e+00 2.31613e+00 140 2013 5 1.33230e+01 2.29866e+01 150 2013 6 4.48220e+00 3.85141e+00 128 2013 7 2.63640e+00 2.15707e+00 32 2013 8 1.52103e+00 1.31811e+00 82 2013 9 4.31793e+00 4.96808e+00 208 2013 10 3.69140e+00 2.48372e+00 147 2013 11 5.44622e+00 4.49771e+00 174 2013 12 3.75572e+00 2.02498e+00 160 2014 1 3.44726e+00 1.48436e+00 188 2014 2 6.50545e+00 2.63473e+00 190 2014 3 8.60319e+00 5.98971e+00 208 2014 4 1.06907e+01 8.14826e+00 109 2014 5 1.17176e+01 1.97449e+01 71 2014 6 1.64348e+00 1.13431e+00 72 2014 7 3.60627e+00 1.13610e+00 132 2014 8 2.20311e+00 6.64241e-01 168 2014 9 1.06193e+01 2.34393e+01 139 2014 10 2.98967e+00 9.21784e-01 327 2014 11 1.94907e+00 4.17119e-01 224 2014 12 1.34411e+00 4.33689e-01 240 2015 1 2.47029e+00 1.42345e+00 207 2015 2 7.06546e+00 5.63425e+00 208 2015 3 9.49585e+00 3.64885e+00 80 2015 4 1.13325e+01 8.71783e+00 65 2015 5 4.42856e+00 2.74938e+00 202 2015 6 5.12000e+00 4.31252e+00 128 2015 7 3.88212e+00 2.40920e+00 75 2015 8 3.19538e+00 1.08363e+00 112 2015 9 3.36786e+00 1.46628e+00 120 2015 10 2.93477e+00 5.89847e-01 204 2015 11 2.87643e+00 1.47893e+00 177 2015 12 2.67397e+00 1.00662e+00 112 2016 1 2.61980e+00 1.39457e+00 198 2016 2 5.13499e+00 2.07306e+00 319 2016 3 5.34881e+00 3.21311e+00 224 2016 4 9.90112e+00 1.21217e+01 156 2016 5 1.29321e+01 1.82523e+01 168 2016 6 2.33572e+00 5.74283e-01 167 2016 7 3.43368e+00 3.07242e+00 202 2016 8 3.50351e+00 1.56439e+00 193 2016 9 2.98088e+00 1.16301e+00 236 2016 10 3.13112e+00 1.33175e+00 264 2016 11 1.92362e+00 6.38044e-01 204 2016 12 1.37897e+00 2.82282e-01 209 2017 1 1.75395e+00 5.66480e-01 144 2017 2 2.38766e+00 4.11465e-01 272 2017 3 1.95976e+00 4.28405e-01 239 2017 4 2.11900e+00 4.88647e-01 180 2017 5 2.29959e+00 4.23597e-01 128 2017 6 3.12451e+00 1.76557e+00 64 2017 7 3.58214e+00 2.47029e+00 110 2017 8 3.25519e+00 1.44130e+00 112 2017 9 3.58435e+00 1.59767e+00 206 2017 10 3.81188e+00 1.76425e+00 320 2017 11 1.88562e+00 5.46122e-01 280 2017 12 2.07824e+00 6.74069e-01 178 2018 1 2.07180e+00 3.69336e-01 221 2018 2 3.65082e+00 2.30898e+00 140 2018 3 3.09999e+00 1.89272e+00 237 2018 4 2.17392e+00 3.47815e-01 191 2018 5 3.32288e+00 1.59539e+00 144 2018 6 3.31707e+00 1.32373e+00 96 2018 7 2.32217e+00 1.51120e+00 107 2018 8 2.85549e+00 1.50315e+00 144 2018 9 2.25641e+00 1.39137e+00 229 2018 10 4.63365e+00 3.05687e+00 336 2018 11 4.87593e+00 2.11613e+00 94 2018 12 5.65993e+00 2.55894e+00 160 2019 1 7.84197e+00 5.53284e+00 168 2019 2 6.44622e+00 3.03632e+00 24 2019 3 1.35715e+01 1.95994e+01 249 2019 4 1.16799e+01 1.59514e+01 116 2019 5 4.79681e+00 2.60827e+00 223 2019 6 2.18672e+00 1.01127e+00 80 2019 7 3.48058e+00 1.81422e+00 93 2019 8 3.68681e+00 2.20711e+00 144 2019 9 3.01030e+00 1.52297e+00 229 2019 10 2.04032e+00 7.71311e-01 204 2019 11 1.76439e+00 2.83926e-01 182 2019 12 1.92258e+00 5.09879e-01 112 2020 1 1.78623e+00 2.48322e-01 160 2020 2 1.73929e+00 4.05248e-01 174 2020 3 1.82044e+00 4.98684e-01 176 2020 4 3.34113e+00 1.10939e+00 152 2020 5 2.22216e+00 6.33116e-01 158 2020 6 3.98052e+00 1.47727e+00 160 2020 7 2.31312e+00 7.22369e-01 96 2020 8 4.54848e+00 2.40389e-01 46 2020 9 4.41103e+00 1.33191e+00 92 2020 10 5.22599e+00 2.76982e+00 217 2020 11 3.21185e+00 1.22511e+00 272 2020 12 4.48391e+00 2.16402e+00 199 2021 1 5.29954e+00 1.65524e+00 132 2021 2 5.59273e+00 1.30108e+00 128 2021 3 8.18526e+00 3.46249e+00 160 2021 4 1.29682e+01 5.93149e+00 176 2021 5 4.47912e+00 1.63591e+00 207 2021 6 2.71209e+00 1.09284e+00 64 2021 7 8.69688e+00 7.89555e+00 63 2021 8 8.48514e+00 6.37002e+00 138 2021 9 3.18586e+00 2.20836e+00 124 2021 10 1.20829e+01 1.21379e+01 94 2021 11 1.28618e+01 9.04328e+00 240 2021 12 1.12224e+01 6.95461e+00 175 2022 1 5.47759e+00 1.87620e+00 224 2022 2 5.28600e+00 2.92343e+00 176 2022 3 6.29577e+00 1.29037e+01 176 2022 4 1.01520e+01 8.40995e+00 96 2022 5 6.50408e+00 3.03289e+00 129 2022 6 2.60029e+00 1.12543e+00 166 2022 7 4.75638e+00 4.64326e+00 115 2022 8 2.66535e+00 9.33390e-01 158 2022 9 1.98100e+00 8.01652e-01 112 2022 10 3.60358e+00 1.52631e+00 368 2022 11 2.51537e+00 1.18361e+00 140 2022 12 1.79797e+00 2.65449e-01 255 2023 1 1.62117e+00 2.36464e-01 224 2023 2 1.70188e+00 5.59369e-01 160 2023 3 3.03105e+00 9.88724e-01 176 2023 4 2.60064e+00 1.36734e+00 112 2023 5 2.02703e+00 5.39303e-01 124 2023 6 1.93570e+00 7.57686e-01 116 2023 7 1.72625e+00 7.20150e-01 76 2023 8 3.72059e+00 5.08473e+00 141 2023 9 2.20989e+00 9.21521e-01 161 2023 10 2.82232e+00 1.19555e+00 235 2023 11 5.98855e+00 5.70614e+00 226 2023 12 7.55339e+00 4.22609e+00 61 2024 1 8.58668e+00 6.78849e+00 96 2024 2 9.33717e+00 7.41050e+00 144 2024 3 5.29610e+00 3.65474e+00 175 2024 4 nan nan 0