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 nan nan 0 2002 8 2.78559e+01 4.40469e+00 90 2002 9 2.92274e+01 3.84132e+00 172 2002 10 3.13792e+01 5.57151e+00 282 2002 11 3.33019e+01 8.51836e+00 324 2002 12 2.65761e+01 4.59020e+00 303 2003 1 2.70136e+01 7.64145e+00 554 2003 2 2.81275e+01 4.79131e+00 250 2003 3 3.31874e+01 4.65878e+00 250 2003 4 2.67223e+01 1.56531e+00 42 2003 5 3.65448e+01 1.34537e+00 4 2003 6 3.29464e+01 3.78464e+00 34 2003 7 nan nan 0 2003 8 3.04343e+01 4.86294e+00 51 2003 9 2.69109e+01 6.32212e+00 116 2003 10 3.26590e+01 4.86839e+00 281 2003 11 2.54907e+01 4.92576e+00 86 2003 12 2.63228e+01 6.20131e+00 144 2004 1 3.03763e+01 6.50965e+00 500 2004 2 3.01220e+01 5.72271e+00 302 2004 3 2.83227e+01 6.22816e+00 304 2004 4 3.22379e+01 4.37168e+00 264 2004 5 3.86063e+01 5.73983e+00 8 2004 6 3.18995e+01 4.86594e+00 107 2004 7 3.32519e+01 2.48275e+00 50 2004 8 nan nan 0 2004 9 1.75305e+01 4.37440e+00 59 2004 10 2.90625e+01 3.92831e+00 127 2004 11 3.13867e+01 5.89378e+00 246 2004 12 3.05026e+01 4.76615e+00 319 2005 1 1.95449e+01 4.61852e+00 227 2005 2 1.09846e+01 1.21942e+01 209 2005 3 3.39144e+01 4.63884e+00 430 2005 4 3.19039e+01 7.82410e+00 96 2005 5 2.28954e+01 8.52642e+00 62 2005 6 4.04367e+01 2.66187e+00 7 2005 7 3.32559e+01 5.08932e+00 60 2005 8 4.52240e+01 6.33155e+00 6 2005 9 2.92583e+01 5.66134e+00 114 2005 10 2.57999e+01 8.90624e+00 36 2005 11 2.53492e+01 1.33509e+01 182 2005 12 2.79315e+01 5.69345e+00 407 2006 1 1.98902e+01 6.61136e+00 198 2006 2 3.14503e+01 5.40455e+00 439 2006 3 3.19258e+01 4.54713e+00 449 2006 4 3.24067e+01 4.44312e+00 103 2006 5 3.40483e+01 4.67509e+00 80 2006 6 3.24213e+01 4.68273e+00 26 2006 7 3.32937e+01 3.34752e+00 9 2006 8 3.32502e+01 5.98222e+00 108 2006 9 2.98253e+01 3.90878e+00 116 2006 10 2.74134e+01 5.40103e+00 166 2006 11 3.22750e+01 4.60906e+00 374 2006 12 2.40357e+01 9.02430e+00 202 2007 1 2.87659e+01 5.10996e+00 385 2007 2 3.35187e+01 5.11694e+00 510 2007 3 3.15809e+01 5.41925e+00 212 2007 4 3.33613e+01 4.63579e+00 86 2007 5 3.21420e+01 2.60165e+00 40 2007 6 3.08863e+01 6.01910e+00 100 2007 7 3.03870e+01 5.61521e+00 171 2007 8 3.25014e+01 3.50246e+00 138 2007 9 3.09600e+01 4.99178e+00 96 2007 10 3.36520e+01 2.72290e+00 86 2007 11 2.46616e+01 3.26071e+00 219 2007 12 2.64732e+01 5.00615e+00 404 2008 1 2.83034e+01 5.40550e+00 414 2008 2 2.93176e+01 6.51653e+00 355 2008 3 3.36016e+01 4.89051e+00 323 2008 4 3.45940e+01 4.56831e+00 189 2008 5 3.50738e+01 3.16735e+00 149 2008 6 3.22400e+01 5.87090e+00 68 2008 7 3.12713e+01 7.90745e+00 143 2008 8 3.31761e+01 2.21160e+00 37 2008 9 3.31118e+01 4.66693e+00 126 2008 10 3.24671e+01 4.33386e+00 274 2008 11 3.12649e+01 4.66889e+00 339 2008 12 2.62909e+01 5.90032e+00 380 2009 1 3.08836e+01 4.57451e+00 399 2009 2 2.95418e+01 3.20154e+00 115 2009 3 2.72327e+01 6.54662e+00 88 2009 4 3.17606e+01 8.34419e+00 311 2009 5 2.77127e+01 6.28182e+00 94 2009 6 3.22140e+01 3.46115e+00 36 2009 7 3.08838e+01 5.71430e+00 58 2009 8 nan nan 0 2009 9 3.08252e+01 7.52736e+00 160 2009 10 3.19649e+01 3.72154e+00 378 2009 11 2.92621e+01 4.97506e+00 292 2009 12 2.50679e+01 5.33563e+00 358 2010 1 2.34579e+01 7.78655e+00 394 2010 2 3.21088e+01 3.55410e+00 247 2010 3 2.96746e+01 4.95957e+00 232 2010 4 3.36973e+01 2.12464e+00 54 2010 5 3.24270e+01 2.62079e+00 58 2010 6 3.59240e+01 3.90958e+00 52 2010 7 nan nan 0 2010 8 3.16831e+01 4.51658e+00 123 2010 9 2.93958e+01 4.13541e+00 133 2010 10 3.11194e+01 6.76114e+00 164 2010 11 2.82213e+01 4.36764e+00 134 2010 12 2.62908e+01 1.17014e+01 334 2011 1 3.16694e+01 4.25438e+00 358 2011 2 2.92208e+01 5.22420e+00 397 2011 3 3.54781e+01 4.11702e+00 252 2011 4 3.43239e+01 3.73495e+00 181 2011 5 3.37910e+01 5.37848e+00 137 2011 6 3.82559e+01 2.88434e+00 6 2011 7 nan nan 0 2011 8 nan nan 0 2011 9 2.94925e+01 3.60372e+00 192 2011 10 2.99706e+01 7.46545e+00 152 2011 11 2.72331e+01 4.76482e+00 137 2011 12 2.76543e+01 7.12702e+00 196 2012 1 2.87692e+01 5.06414e+00 255 2012 2 3.30538e+01 4.59593e+00 198 2012 3 3.38426e+01 3.53780e+00 92 2012 4 2.90042e+01 5.85507e+00 44 2012 5 3.75842e+01 1.22076e+00 25 2012 6 4.30763e+01 0.00000e+00 1 2012 7 3.47151e+01 3.82780e+00 44 2012 8 2.97526e+01 1.04404e+01 58 2012 9 3.03741e+01 4.18257e+00 190 2012 10 2.91994e+01 7.84653e+00 246 2012 11 3.15875e+01 3.48177e+00 243 2012 12 2.49298e+01 5.57720e+00 258 2013 1 2.42429e+01 9.70512e+00 323 2013 2 3.18448e+01 4.85023e+00 489 2013 3 2.90689e+01 8.59450e+00 323 2013 4 3.39876e+01 6.74697e+00 236 2013 5 3.71095e+01 3.55317e+00 17 2013 6 nan nan 0 2013 7 3.58984e+01 3.77849e+00 51 2013 8 3.74351e+01 3.36166e+00 16 2013 9 3.26584e+01 2.51158e+00 114 2013 10 3.29943e+01 2.01567e+00 73 2013 11 2.45930e+01 5.11467e+00 206 2013 12 1.38040e+01 1.03755e+01 248 2014 1 2.68745e+01 7.40253e+00 342 2014 2 3.27622e+01 4.73898e+00 356 2014 3 3.45121e+01 5.51210e+00 365 2014 4 3.41438e+01 4.94067e+00 180 2014 5 3.39550e+01 2.34781e+00 30 2014 6 3.55981e+01 4.05848e+00 81 2014 7 3.70306e+01 3.31647e+00 89 2014 8 2.72354e+01 3.48655e+00 47 2014 9 3.32910e+01 3.46260e+00 124 2014 10 2.78931e+01 4.71288e+00 170 2014 11 2.79560e+01 7.49593e+00 264 2014 12 2.64789e+01 7.69562e+00 438 2015 1 2.71281e+01 6.34991e+00 301 2015 2 2.70611e+01 3.83999e+00 411 2015 3 3.18731e+01 6.30747e+00 174 2015 4 3.60133e+01 3.82972e+00 107 2015 5 3.21902e+01 4.88557e+00 142 2015 6 nan nan 0 2015 7 nan nan 0 2015 8 3.24490e+01 3.04864e+00 203 2015 9 3.27344e+01 3.66302e+00 187 2015 10 2.83603e+01 5.07302e+00 290 2015 11 2.96139e+01 6.23519e+00 179 2015 12 3.01547e+01 2.83156e+00 210 2016 1 2.58608e+01 4.70716e+00 388 2016 2 2.84085e+01 5.01614e+00 334 2016 3 3.18791e+01 3.67380e+00 198 2016 4 3.57019e+01 5.35664e+00 366 2016 5 3.37432e+01 4.62788e+00 142 2016 6 3.56483e+01 4.67374e+00 73 2016 7 3.45611e+01 1.07038e-01 3 2016 8 3.21179e+01 4.96723e+00 91 2016 9 3.19882e+01 5.60717e+00 235 2016 10 2.26258e+01 6.02891e+00 137 2016 11 1.98708e+01 8.59998e+00 82 2016 12 2.56182e+01 5.57155e+00 261 2017 1 2.72106e+01 7.13915e+00 363 2017 2 3.16068e+01 5.81637e+00 402 2017 3 2.80601e+01 6.22916e+00 199 2017 4 3.08948e+01 4.94481e+00 185 2017 5 3.29733e+01 5.37834e+00 121 2017 6 3.14068e+01 5.29775e+00 92 2017 7 2.89637e+01 4.66725e+00 65 2017 8 nan nan 0 2017 9 1.89577e+01 8.26077e+00 96 2017 10 2.59802e+01 5.98317e+00 274 2017 11 2.82023e+01 6.35152e+00 220 2017 12 2.56890e+01 5.01994e+00 363 2018 1 2.06969e+01 1.11576e+01 172 2018 2 1.68432e+01 8.19624e+00 278 2018 3 2.73309e+01 5.09172e+00 189 2018 4 3.40656e+01 4.22279e+00 163 2018 5 3.21960e+01 4.13108e+00 206 2018 6 3.02022e+01 3.19227e+00 77 2018 7 2.83171e+01 2.84900e-01 12 2018 8 3.32589e+01 2.77704e+00 72 2018 9 3.44758e+01 4.48365e+00 86 2018 10 2.75780e+01 5.98574e+00 190 2018 11 2.73816e+01 5.53647e+00 337 2018 12 2.48829e+01 8.89877e+00 226 2019 1 2.49241e+01 5.49489e+00 403 2019 2 3.01343e+01 3.42235e+00 255 2019 3 3.44492e+01 4.61541e+00 331 2019 4 3.43671e+01 7.43751e+00 189 2019 5 3.30187e+01 4.49400e+00 128 2019 6 3.37080e+01 3.51938e+00 95 2019 7 3.26292e+01 4.77705e+00 51 2019 8 3.41943e+01 3.49575e+00 58 2019 9 2.29046e+01 7.76044e+00 174 2019 10 2.82654e+01 6.41940e+00 270 2019 11 2.40179e+01 3.72850e+00 350 2019 12 1.96695e+01 5.02163e+00 348 2020 1 1.92223e+01 1.25681e+01 226 2020 2 2.90258e+01 6.16248e+00 323 2020 3 2.91424e+01 4.69225e+00 318 2020 4 3.39131e+01 5.73083e+00 239 2020 5 3.30649e+01 6.86318e+00 89 2020 6 3.05798e+01 6.61253e+00 251 2020 7 3.34302e+01 2.10725e+00 79 2020 8 3.05229e+01 4.17335e+00 91 2020 9 3.31038e+01 4.36242e+00 56 2020 10 2.75705e+01 4.57180e+00 238 2020 11 2.92107e+01 3.24510e+00 199 2020 12 2.50675e+01 5.78217e+00 335 2021 1 3.21942e+01 4.86106e+00 456 2021 2 2.45495e+01 3.66201e+00 240 2021 3 3.27115e+01 3.82366e+00 331 2021 4 2.97718e+01 7.79034e+00 51 2021 5 3.28538e+01 5.62792e+00 84 2021 6 2.68365e+01 1.63371e+00 34 2021 7 3.58787e+01 4.34700e+00 18 2021 8 3.51203e+01 4.84509e+00 59 2021 9 3.11650e+01 5.93002e+00 177 2021 10 3.29920e+01 5.97587e+00 211 2021 11 2.82334e+01 6.33017e+00 331 2021 12 2.07145e+01 1.20678e+01 277 2022 1 3.08683e+01 3.39743e+00 574 2022 2 3.32397e+01 4.73554e+00 248 2022 3 3.41222e+01 5.41599e+00 212 2022 4 2.91789e+01 5.10125e+00 42 2022 5 3.84126e+01 5.69272e+00 34 2022 6 3.77157e+01 5.48439e+00 163 2022 7 3.26451e+01 2.38396e+00 41 2022 8 3.62536e+01 8.59465e+00 71 2022 9 3.16700e+01 2.94435e+00 35 2022 10 3.09026e+01 4.27359e+00 285 2022 11 3.01552e+01 4.34261e+00 411 2022 12 2.04795e+01 6.99582e+00 791 2023 1 3.01409e+01 6.77245e+00 544 2023 2 2.96562e+01 6.74811e+00 269 2023 3 3.33134e+01 4.42593e+00 479 2023 4 3.57270e+01 6.75088e+00 401 2023 5 3.64565e+01 3.81212e+00 265 2023 6 3.33242e+01 2.94225e+00 151 2023 7 nan nan 0 2023 8 2.85427e+01 3.72451e+00 152 2023 9 2.59435e+01 7.54930e+00 183 2023 10 2.54415e+01 1.01388e+01 219 2023 11 2.87672e+01 8.19855e+00 324 2023 12 2.34890e+01 9.83207e+00 399 2024 1 2.61508e+01 6.45576e+00 450 2024 2 2.69213e+01 9.13942e+00 462 2024 3 3.03758e+01 7.52020e+00 222 2024 4 nan nan 0