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 2.28987e+01 2.96522e+00 64 2002 8 1.93027e+01 1.47935e+00 121 2002 9 1.02359e+01 6.12818e+00 144 2002 10 1.20470e+01 4.36889e+00 240 2002 11 7.03280e+00 2.75374e+00 237 2002 12 8.24969e+00 3.73292e+00 199 2003 1 9.74251e+00 2.55959e+00 256 2003 2 1.22714e+01 4.76448e+00 185 2003 3 1.06965e+01 8.50993e+00 112 2003 4 4.36691e+00 1.82169e+00 144 2003 5 3.80526e+00 2.72970e+00 78 2003 6 1.20392e+01 4.15127e+00 112 2003 7 9.11478e+00 6.67291e+00 64 2003 8 4.93302e+00 3.53497e+00 96 2003 9 8.74784e+00 4.65531e+00 166 2003 10 1.04243e+01 5.15162e+00 224 2003 11 9.61239e+00 4.35409e+00 272 2003 12 7.14547e+00 3.56185e+00 224 2004 1 2.14537e+01 5.12057e+00 240 2004 2 1.81239e+01 3.70013e+00 64 2004 3 3.19218e+01 2.70127e+00 256 2004 4 2.23325e+01 7.12698e+00 162 2004 5 2.21693e+01 2.98553e+00 209 2004 6 2.58230e+01 1.24763e+00 100 2004 7 2.16303e+01 2.84078e+00 77 2004 8 1.82314e+01 4.65419e+00 144 2004 9 1.01090e+01 4.57371e+00 88 2004 10 7.25437e+00 3.94001e+00 81 2004 11 2.84741e+00 3.31978e+00 116 2004 12 7.08587e+00 4.45644e+00 191 2005 1 1.21798e+01 4.41028e+00 168 2005 2 1.60764e+01 4.54992e+00 128 2005 3 1.07187e+01 6.30745e+00 168 2005 4 7.22239e+00 5.36436e+00 175 2005 5 1.18781e+01 6.19892e+00 184 2005 6 8.26358e+00 5.83634e+00 112 2005 7 1.16628e+01 8.54394e+00 140 2005 8 3.39113e+00 5.66990e+00 44 2005 9 3.95887e-01 3.60639e-01 80 2005 10 5.12165e+00 2.92091e+00 274 2005 11 1.41082e+01 2.32828e+00 287 2005 12 1.84099e+01 5.32593e+00 256 2006 1 1.52737e+01 1.08649e+01 203 2006 2 1.44363e+01 4.53934e+00 179 2006 3 2.38735e+01 5.06497e+00 257 2006 4 2.89327e+01 3.60110e+00 208 2006 5 2.90633e+01 3.38510e+00 236 2006 6 2.47214e+01 5.95152e+00 144 2006 7 2.56017e+01 2.92639e+00 159 2006 8 2.52530e+01 3.45383e+00 84 2006 9 1.57009e+01 3.90416e+00 174 2006 10 1.56004e+01 4.99789e+00 234 2006 11 1.41798e+01 4.79467e+00 240 2006 12 1.51531e+01 4.62099e+00 144 2007 1 2.08471e+01 5.38325e+00 131 2007 2 2.00103e+01 6.43309e+00 206 2007 3 2.83926e+01 3.36519e+00 310 2007 4 2.34837e+01 7.80440e+00 215 2007 5 2.27857e+01 2.43251e+00 128 2007 6 2.19044e+01 4.14436e+00 137 2007 7 9.47652e+00 4.50667e+00 125 2007 8 6.65680e+00 2.61512e+00 128 2007 9 1.19546e+01 4.49344e+00 159 2007 10 1.52898e+01 8.04840e-01 116 2007 11 1.62056e+01 2.83515e+00 256 2007 12 1.87811e+01 6.19103e+00 173 2008 1 2.00339e+01 5.81689e+00 259 2008 2 2.51946e+01 3.29304e+00 257 2008 3 1.40209e+01 7.53212e+00 208 2008 4 2.69544e+01 2.37286e+00 179 2008 5 1.89211e+01 6.29665e+00 160 2008 6 2.23181e+01 4.44599e+00 128 2008 7 2.24087e+01 3.07356e+00 106 2008 8 2.04032e+01 2.08200e+00 48 2008 9 1.51245e+01 2.23833e+00 192 2008 10 1.46728e+01 5.55239e+00 272 2008 11 1.40356e+01 4.59279e+00 248 2008 12 1.09868e+01 6.31420e+00 240 2009 1 1.37891e+01 5.87330e+00 192 2009 2 2.14312e+01 4.57103e+00 244 2009 3 2.32698e+01 6.88903e+00 272 2009 4 2.05623e+01 4.13531e+00 192 2009 5 1.89857e+01 1.18586e+01 128 2009 6 2.53096e+01 6.92614e+00 112 2009 7 2.27781e+01 2.65084e+00 48 2009 8 1.76552e+01 4.01262e+00 148 2009 9 2.14167e+01 2.18994e+00 173 2009 10 8.60869e+00 4.58878e+00 209 2009 11 9.25532e+00 4.13837e+00 160 2009 12 1.27160e+01 4.39536e+00 77 2010 1 8.29927e+00 3.93431e+00 225 2010 2 5.12288e+00 3.35429e+00 206 2010 3 5.99629e+00 3.09611e+00 256 2010 4 1.08409e+01 4.13049e+00 223 2010 5 2.10502e+01 6.52830e+00 179 2010 6 1.95413e+01 6.08831e+00 177 2010 7 2.41929e+01 3.07647e+00 72 2010 8 2.08800e+01 2.81369e+00 108 2010 9 2.05646e+01 3.05725e+00 192 2010 10 2.21018e+01 3.54189e+00 342 2010 11 1.89623e+01 3.58967e+00 288 2010 12 1.53846e+01 4.33915e+00 272 2011 1 1.06851e+01 4.81537e+00 176 2011 2 1.76739e+01 2.04139e+00 176 2011 3 2.60836e+01 3.94500e+00 240 2011 4 2.71593e+01 2.52139e+00 256 2011 5 1.77381e+01 3.17152e+00 240 2011 6 2.05878e+01 3.20497e+00 144 2011 7 1.30238e+01 8.11820e+00 86 2011 8 2.25230e+01 3.79805e+00 179 2011 9 1.37884e+01 5.22636e+00 192 2011 10 1.51136e+01 5.28436e+00 272 2011 11 1.71204e+01 3.63028e+00 300 2011 12 1.64699e+01 4.71521e+00 240 2012 1 1.51480e+01 4.93594e+00 192 2012 2 1.99469e+01 6.40085e+00 112 2012 3 3.08857e+01 4.52486e+00 240 2012 4 2.73169e+01 3.65946e+00 253 2012 5 2.02508e+01 3.15054e+00 144 2012 6 1.82582e+01 9.80092e+00 128 2012 7 9.25221e+00 5.93931e+00 100 2012 8 8.04842e+00 3.79466e+00 130 2012 9 9.52690e+00 4.57697e+00 159 2012 10 1.15001e+01 6.21731e+00 192 2012 11 7.92689e+00 2.80993e+00 279 2012 12 9.49292e+00 6.40611e+00 148 2013 1 1.55057e+01 9.63992e+00 112 2013 2 2.44333e+01 6.53854e+00 176 2013 3 1.39489e+01 4.36875e+00 203 2013 4 2.05487e+01 3.91573e+00 96 2013 5 1.52709e+01 3.96605e+00 136 2013 6 1.45455e+01 5.83219e+00 142 2013 7 1.76181e+01 1.88469e+00 28 2013 8 9.30815e+00 5.02224e+00 158 2013 9 8.16884e+00 8.00678e+00 160 2013 10 7.23784e+00 4.54753e+00 193 2013 11 1.67903e+01 5.25251e+00 112 2013 12 1.63849e+01 3.95107e+00 160 2014 1 1.25353e+01 4.43782e+00 168 2014 2 1.62932e+01 3.79854e+00 176 2014 3 1.35749e+01 5.16439e+00 192 2014 4 1.60950e+01 6.37061e+00 160 2014 5 7.84190e+00 5.27220e+00 163 2014 6 8.39975e+00 5.69863e+00 158 2014 7 1.50541e+01 1.52883e+00 85 2014 8 2.35387e+01 3.88855e+00 124 2014 9 1.44676e+01 8.04499e+00 124 2014 10 6.89830e+00 3.65302e+00 352 2014 11 8.84177e+00 3.82535e+00 272 2014 12 1.66241e+01 3.85118e+00 240 2015 1 1.87734e+01 7.49213e+00 197 2015 2 1.46357e+01 4.23966e+00 208 2015 3 1.68833e+01 6.25154e+00 80 2015 4 1.18893e+01 8.13535e+00 69 2015 5 2.50969e+01 4.06031e+00 252 2015 6 2.14239e+01 4.98972e+00 144 2015 7 1.73016e+01 3.17022e+00 96 2015 8 1.80495e+01 2.71097e+00 141 2015 9 1.35456e+01 6.09179e+00 96 2015 10 1.07517e+01 3.50717e+00 208 2015 11 1.56406e+01 6.32467e+00 224 2015 12 1.90143e+01 1.83600e+00 112 2016 1 1.15566e+01 3.53288e+00 160 2016 2 7.99278e+00 5.99802e+00 288 2016 3 1.45568e+01 3.36990e+00 160 2016 4 1.83297e+01 6.26498e+00 163 2016 5 1.59445e+01 8.23054e+00 205 2016 6 2.57980e+01 1.74288e+00 144 2016 7 2.25121e+01 2.98325e+00 188 2016 8 1.84432e+01 6.84731e+00 192 2016 9 1.80314e+01 8.65765e+00 238 2016 10 1.81814e+01 5.31195e+00 272 2016 11 1.90755e+01 3.78229e+00 225 2016 12 1.64340e+01 1.81088e+00 224 2017 1 1.21096e+01 7.08872e+00 160 2017 2 1.46758e+01 5.57375e+00 256 2017 3 2.29799e+01 2.69902e+00 282 2017 4 2.69336e+01 2.71298e+00 207 2017 5 1.62049e+01 5.56944e+00 176 2017 6 2.01703e+01 5.33635e+00 92 2017 7 1.85473e+01 4.48322e+00 88 2017 8 1.44544e+01 3.62431e+00 144 2017 9 1.28540e+01 4.55920e+00 176 2017 10 7.36038e+00 3.68896e+00 288 2017 11 1.68408e+01 3.06640e+00 300 2017 12 1.33739e+01 3.22386e+00 160 2018 1 1.79519e+01 4.89558e+00 208 2018 2 2.80849e+01 2.90664e+00 128 2018 3 2.64035e+01 5.57672e+00 240 2018 4 2.54845e+01 4.97314e+00 176 2018 5 1.88651e+01 3.85397e+00 144 2018 6 1.61929e+01 7.34869e+00 154 2018 7 2.30071e+01 5.35298e+00 122 2018 8 9.40057e+00 4.65523e+00 112 2018 9 1.63131e+01 6.00799e+00 164 2018 10 1.15358e+01 7.19586e+00 305 2018 11 8.38887e+00 3.43300e+00 112 2018 12 6.58063e+00 5.47740e+00 144 2019 1 8.44825e-01 1.12127e+00 176 2019 2 7.24797e+00 5.16940e+00 104 2019 3 9.50681e+00 6.10880e+00 207 2019 4 8.72455e+00 3.33134e+00 127 2019 5 2.01414e+01 4.14247e+00 240 2019 6 1.81168e+01 3.15813e+00 92 2019 7 2.09030e+01 3.39150e+00 112 2019 8 1.61572e+01 5.57360e+00 162 2019 9 1.71861e+01 4.33630e+00 288 2019 10 1.35511e+01 4.56598e+00 208 2019 11 1.37275e+01 2.77165e+00 143 2019 12 1.49508e+01 6.02238e+00 133 2020 1 2.44981e+01 4.40697e+00 149 2020 2 1.36394e+01 7.38118e+00 168 2020 3 2.36677e+01 4.54659e+00 240 2020 4 1.67776e+01 5.34042e+00 152 2020 5 1.97927e+01 3.89931e+00 190 2020 6 1.96663e+01 3.99472e+00 178 2020 7 2.72716e+01 3.18084e+00 96 2020 8 1.50836e+01 6.82034e+00 78 2020 9 1.03383e+01 2.46102e+00 144 2020 10 1.46184e+01 4.10091e+00 176 2020 11 1.61925e+01 4.73213e+00 235 2020 12 1.51042e+01 5.46629e+00 192 2021 1 1.06460e+01 4.00812e+00 112 2021 2 1.08318e+01 6.47396e+00 112 2021 3 1.29064e+01 6.74180e+00 176 2021 4 1.44359e+01 8.79743e+00 226 2021 5 1.50436e+01 4.98956e+00 192 2021 6 1.46149e+01 3.75250e+00 64 2021 7 1.04774e+01 6.04274e+00 96 2021 8 1.12844e+01 7.29803e+00 123 2021 9 4.19057e+00 5.14291e+00 128 2021 10 3.88371e+00 3.38416e+00 208 2021 11 5.34552e+00 5.13265e+00 240 2021 12 1.36115e+01 3.62943e+00 192 2022 1 8.22235e+00 4.98104e+00 263 2022 2 1.47684e+01 3.13039e+00 182 2022 3 1.48090e+01 5.54911e+00 208 2022 4 1.49226e+01 3.29977e+00 96 2022 5 1.21092e+01 5.04261e+00 141 2022 6 2.26400e+01 5.02623e+00 160 2022 7 2.03035e+01 5.24052e+00 127 2022 8 1.44151e+01 3.75048e+00 143 2022 9 1.65425e+01 3.85628e+00 160 2022 10 1.40069e+01 3.25397e+00 288 2022 11 1.50407e+01 5.29579e+00 128 2022 12 1.48938e+01 6.03165e+00 250 2023 1 2.24139e+01 6.77670e+00 224 2023 2 1.77784e+01 1.02122e+01 162 2023 3 2.53432e+01 4.28629e+00 158 2023 4 3.08015e+01 2.65141e+00 96 2023 5 2.40445e+01 7.93072e+00 170 2023 6 1.87305e+01 1.63397e+00 112 2023 7 2.49683e+01 3.39322e+00 141 2023 8 1.95152e+01 7.11214e+00 218 2023 9 9.15092e+00 3.82186e+00 148 2023 10 1.13421e+01 3.54543e+00 208 2023 11 1.42841e+01 2.65750e+00 208 2023 12 1.41029e+01 5.40209e+00 66 2024 1 1.10051e+01 3.21923e+00 135 2024 2 1.16835e+01 8.77843e+00 167 2024 3 8.51862e+00 3.56135e+00 92 2024 4 nan nan 0