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 2.26723e+01 1.37245e+01 188 2002 8 1.99804e+01 1.24848e+01 147 2002 9 1.73492e+01 1.20100e+01 173 2002 10 1.41537e+01 1.01796e+01 457 2002 11 8.82311e+00 7.49035e+00 174 2002 12 7.44700e+00 6.27561e+00 198 2003 1 7.10383e+00 4.95661e+00 62 2003 2 1.63109e+01 7.83735e+00 202 2003 3 1.19316e+01 9.28090e+00 230 2003 4 1.82001e+01 1.40356e+01 323 2003 5 1.50951e+01 1.11181e+01 248 2003 6 1.47293e+01 8.24433e+00 95 2003 7 1.79921e+01 1.21834e+01 151 2003 8 1.37043e+01 1.08395e+01 54 2003 9 1.70315e+01 1.20131e+01 190 2003 10 9.78684e+00 8.93530e+00 152 2003 11 5.86239e+00 6.14401e+00 62 2003 12 6.10148e+00 5.51641e+00 63 2004 1 1.34769e+01 8.62399e+00 310 2004 2 1.11814e+01 7.88720e+00 296 2004 3 1.19465e+01 1.22530e+01 410 2004 4 1.71606e+01 1.25367e+01 248 2004 5 1.73059e+01 1.44150e+01 153 2004 6 1.82703e+01 1.25950e+01 160 2004 7 1.05723e+01 1.01692e+01 152 2004 8 1.91040e+01 1.20977e+01 97 2004 9 1.36868e+01 9.76658e+00 71 2004 10 1.51908e+01 1.04067e+01 455 2004 11 1.02585e+01 8.54613e+00 489 2004 12 1.10111e+01 7.76003e+00 268 2005 1 9.46997e+00 6.80211e+00 242 2005 2 8.47658e+00 7.69615e+00 153 2005 3 1.66812e+01 1.15989e+01 235 2005 4 1.26355e+01 9.52417e+00 33 2005 5 2.13265e+01 1.32430e+01 238 2005 6 9.16026e+00 9.76758e+00 125 2005 7 1.69591e+01 1.33832e+01 254 2005 8 1.52148e+01 1.02587e+01 103 2005 9 1.19458e+01 1.01163e+01 114 2005 10 7.33440e+00 8.42536e+00 74 2005 11 1.84582e+00 2.18802e+00 222 2005 12 4.07465e+00 4.40863e+00 542 2006 1 7.32122e+00 6.76927e+00 136 2006 2 8.63497e+00 7.53273e+00 206 2006 3 7.86920e+00 8.01586e+00 107 2006 4 1.51188e+01 1.07656e+01 227 2006 5 1.81485e+01 1.22674e+01 130 2006 6 1.68487e+01 1.15046e+01 219 2006 7 1.42380e+01 1.24276e+01 88 2006 8 1.34623e+01 1.06399e+01 137 2006 9 1.52945e+01 1.10571e+01 218 2006 10 1.47347e+01 1.07129e+01 339 2006 11 6.95129e+00 5.74814e+00 136 2006 12 1.00674e+01 6.38024e+00 131 2007 1 1.05116e+01 7.65603e+00 384 2007 2 3.17959e+00 3.61969e+00 29 2007 3 1.24606e+01 1.13978e+01 241 2007 4 1.58077e+01 1.21096e+01 222 2007 5 1.87152e+01 1.42756e+01 286 2007 6 1.28193e+01 1.00413e+01 107 2007 7 2.24802e+01 1.31827e+01 244 2007 8 1.38437e+01 1.12216e+01 110 2007 9 1.22231e+01 8.27525e+00 62 2007 10 9.16290e+00 8.54381e+00 152 2007 11 8.81644e+00 6.29675e+00 228 2007 12 8.19974e+00 6.68579e+00 110 2008 1 1.01321e+01 7.26537e+00 264 2008 2 9.78364e+00 7.97945e+00 272 2008 3 1.28337e+01 1.13648e+01 198 2008 4 1.46941e+01 1.10825e+01 319 2008 5 1.60016e+01 1.36323e+01 212 2008 6 1.60549e+01 1.14740e+01 123 2008 7 2.36467e+01 1.28883e+01 232 2008 8 2.16678e+01 1.31520e+01 191 2008 9 9.46746e+00 8.94004e+00 67 2008 10 1.49579e+01 8.88393e+00 127 2008 11 1.07087e+01 7.47282e+00 301 2008 12 6.84529e+00 5.41026e+00 207 2009 1 1.12722e+01 7.86821e+00 44 2009 2 9.97013e+00 8.73757e+00 292 2009 3 8.18165e+00 8.62356e+00 171 2009 4 1.70268e+01 1.26645e+01 219 2009 5 2.14379e+01 1.39150e+01 239 2009 6 1.50435e+01 1.16660e+01 84 2009 7 1.59798e+01 1.17224e+01 106 2009 8 1.85603e+01 1.37276e+01 180 2009 9 1.53829e+01 1.01808e+01 214 2009 10 1.55731e+01 1.03635e+01 377 2009 11 1.08336e+01 8.90832e+00 339 2009 12 7.59004e+00 5.88080e+00 202 2010 1 9.64173e+00 7.85621e+00 156 2010 2 7.01557e+00 5.79533e+00 59 2010 3 3.27005e+00 5.69386e+00 114 2010 4 1.09710e+01 1.02361e+01 207 2010 5 1.79020e+01 1.31683e+01 201 2010 6 1.93357e+01 1.23536e+01 176 2010 7 1.95235e+01 1.23134e+01 69 2010 8 1.63140e+01 1.15507e+01 200 2010 9 2.18487e+01 1.16379e+01 230 2010 10 9.50982e+00 8.83858e+00 250 2010 11 1.31629e+01 8.79123e+00 463 2010 12 1.13609e+01 7.38715e+00 246 2011 1 3.75006e+00 1.32128e+00 17 2011 2 1.33219e+01 8.90696e+00 156 2011 3 1.72853e+01 1.22293e+01 240 2011 4 1.73242e+01 1.26235e+01 364 2011 5 1.13750e+01 1.06355e+01 186 2011 6 1.95820e+01 1.31419e+01 320 2011 7 2.52299e+01 1.36671e+01 109 2011 8 2.55810e+01 1.35303e+01 57 2011 9 1.65651e+01 1.14482e+01 153 2011 10 1.33998e+01 1.25044e+01 143 2011 11 7.98076e+00 7.78628e+00 327 2011 12 6.41174e+00 5.98100e+00 199 2012 1 1.16633e+01 8.04199e+00 407 2012 2 1.41661e+01 9.23754e+00 183 2012 3 1.09866e+01 9.77454e+00 273 2012 4 1.65994e+01 1.32184e+01 248 2012 5 1.05672e+01 9.03966e+00 48 2012 6 1.04487e+01 1.04267e+01 84 2012 7 1.13575e+01 1.15535e+01 40 2012 8 1.31088e+01 1.10824e+01 107 2012 9 1.65710e+01 1.06589e+01 104 2012 10 1.22270e+01 8.53692e+00 70 2012 11 1.11697e+01 8.30524e+00 359 2012 12 9.52583e+00 7.32667e+00 144 2013 1 9.17289e+00 7.99631e+00 257 2013 2 1.04262e+01 7.86020e+00 273 2013 3 1.81445e+01 1.23482e+01 295 2013 4 2.17079e+01 1.31721e+01 273 2013 5 2.00073e+01 1.22062e+01 138 2013 6 1.82483e+01 1.20325e+01 48 2013 7 2.04468e+01 1.45861e+01 144 2013 8 1.82368e+01 1.34333e+01 110 2013 9 1.49378e+01 1.08810e+01 87 2013 10 1.13483e+01 9.48702e+00 309 2013 11 1.03874e+01 8.09728e+00 320 2013 12 1.02015e+01 7.47099e+00 222 2014 1 1.21578e+01 7.03550e+00 192 2014 2 1.43836e+01 8.58987e+00 318 2014 3 1.47720e+01 1.06911e+01 160 2014 4 1.32225e+01 1.11136e+01 99 2014 5 2.06787e+01 1.32135e+01 204 2014 6 2.16548e+01 1.27482e+01 216 2014 7 1.11557e+01 8.99982e+00 119 2014 8 1.55872e+01 1.21072e+01 125 2014 9 1.15535e+01 8.08669e+00 54 2014 10 1.29467e+01 9.41319e+00 126 2014 11 1.07171e+01 8.77021e+00 440 2014 12 8.33233e+00 7.00077e+00 231 2015 1 5.22253e+00 5.61592e+00 44 2015 2 1.22428e+01 9.78561e+00 40 2015 3 1.05794e+01 9.56340e+00 313 2015 4 1.74437e+01 1.22393e+01 210 2015 5 1.88698e+01 1.28253e+01 263 2015 6 1.90173e+01 1.28842e+01 154 2015 7 1.94127e+01 1.56578e+01 9 2015 8 2.15727e+01 1.08307e+01 24 2015 9 1.06453e+01 9.09993e+00 44 2015 10 1.21957e+01 1.00388e+01 162 2015 11 1.01286e+01 7.65921e+00 160 2015 12 9.22404e+00 7.90249e+00 98 2016 1 2.95193e+00 2.60604e+00 18 2016 2 7.37003e+00 6.43047e+00 138 2016 3 1.39899e+01 1.15252e+01 190 2016 4 1.75817e+01 1.32825e+01 187 2016 5 1.69321e+01 1.25679e+01 261 2016 6 1.94107e+01 1.10335e+01 107 2016 7 1.80405e+01 1.33769e+01 167 2016 8 1.58746e+01 1.27942e+01 120 2016 9 1.38095e+01 1.00374e+01 83 2016 10 1.12113e+01 9.06767e+00 237 2016 11 6.70007e+00 6.39224e+00 210 2016 12 7.88002e+00 6.98872e+00 223 2017 1 1.06984e+01 9.19725e+00 209 2017 2 8.84957e+00 6.47887e+00 116 2017 3 1.50442e+01 1.13125e+01 331 2017 4 1.73631e+01 1.26018e+01 303 2017 5 2.02383e+01 1.27528e+01 311 2017 6 1.83365e+01 1.25628e+01 212 2017 7 2.01159e+01 1.19288e+01 184 2017 8 6.83310e+00 7.18231e+00 33 2017 9 1.83692e+01 9.92609e+00 51 2017 10 7.86158e+00 8.48211e+00 49 2017 11 4.37718e+00 5.67587e+00 323 2017 12 1.08538e+01 6.31526e+00 159 2018 1 9.67962e+00 4.97507e+00 53 2018 2 6.09877e+00 6.39873e+00 90 2018 3 1.10021e+01 1.02544e+01 319 2018 4 1.33052e+01 1.04432e+01 231 2018 5 3.26152e+00 2.95522e+00 10 2018 6 1.63353e+01 9.85755e+00 88 2018 7 2.44472e+01 1.28478e+01 176 2018 8 1.28709e+01 1.14898e+01 84 2018 9 1.92228e+01 1.14697e+01 175 2018 10 2.99656e+00 2.83557e+00 17 2018 11 8.29302e+00 6.96364e+00 44 2018 12 7.65356e+00 6.84590e+00 296 2019 1 9.13693e+00 7.42379e+00 149 2019 2 8.20154e+00 5.81588e+00 136 2019 3 1.38756e+01 1.06331e+01 474 2019 4 1.42441e+01 9.83737e+00 155 2019 5 9.66678e+00 8.55271e+00 318 2019 6 2.03278e+01 1.37415e+01 358 2019 7 1.59861e+01 1.10963e+01 270 2019 8 1.71819e+01 1.12509e+01 156 2019 9 1.65492e+01 1.01662e+01 210 2019 10 1.45694e+01 9.66645e+00 355 2019 11 9.36740e+00 7.90099e+00 224 2019 12 9.48420e+00 7.19908e+00 280 2020 1 4.66390e+00 4.60873e+00 129 2020 2 9.21941e+00 8.38392e+00 123 2020 3 1.29959e+01 1.05606e+01 417 2020 4 1.43839e+01 1.15327e+01 328 2020 5 2.25591e+01 1.38762e+01 341 2020 6 1.61966e+01 1.05904e+01 207 2020 7 2.09774e+01 1.28578e+01 153 2020 8 1.88461e+01 1.19540e+01 298 2020 9 1.61188e+01 1.01815e+01 300 2020 10 1.41997e+01 1.00685e+01 175 2020 11 5.17596e+00 5.60066e+00 105 2020 12 8.05755e+00 6.07220e+00 211 2021 1 8.67445e+00 7.87989e+00 219 2021 2 7.99477e+00 7.04312e+00 127 2021 3 1.38965e+01 1.07405e+01 160 2021 4 1.69056e+01 1.25892e+01 268 2021 5 1.85711e+01 1.23791e+01 327 2021 6 1.87970e+01 1.20439e+01 106 2021 7 2.01291e+01 1.50253e+01 144 2021 8 1.39730e+01 9.55005e+00 83 2021 9 1.79592e+01 1.01383e+01 91 2021 10 1.35966e+01 1.05679e+01 89 2021 11 9.83215e+00 7.75257e+00 110 2021 12 1.01758e+01 6.97021e+00 291 2022 1 5.80007e+00 5.00910e+00 119 2022 2 1.20026e+01 8.88268e+00 207 2022 3 1.41226e+01 9.97667e+00 189 2022 4 1.45572e+01 1.02585e+01 58 2022 5 1.79250e+01 1.32010e+01 136 2022 6 8.84950e+00 8.07560e+00 20 2022 7 1.87094e+01 1.08302e+01 78 2022 8 1.85878e+01 1.29889e+01 220 2022 9 1.46344e+01 1.17733e+01 196 2022 10 7.60519e+00 5.49384e+00 77 2022 11 1.29116e+01 8.57099e+00 356 2022 12 1.04379e+01 8.04090e+00 336 2023 1 7.51962e+00 6.88440e+00 232 2023 2 1.25266e+01 8.32733e+00 416 2023 3 1.51216e+01 1.11920e+01 347 2023 4 1.62389e+01 1.22170e+01 140 2023 5 1.89245e+01 1.27074e+01 100 2023 6 9.39633e+00 9.00116e+00 55 2023 7 1.82276e+01 1.23510e+01 193 2023 8 1.88270e+01 1.12414e+01 130 2023 9 1.90815e+01 1.01767e+01 103 2023 10 7.81900e+00 6.80540e+00 143 2023 11 1.10272e+01 9.22574e+00 197 2023 12 8.70506e+00 6.90658e+00 202 2024 1 9.38681e+00 7.84076e+00 139 2024 2 1.24452e+01 9.50662e+00 289 2024 3 2.09760e+01 1.32864e+01 272 2024 4 nan nan 0