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 4.14906e+00 1.57687e+00 96 2002 8 8.03700e+00 5.52561e+00 142 2002 9 7.08156e+00 2.15997e+00 114 2002 10 6.16591e+00 3.14102e+00 421 2002 11 8.25562e+00 2.95461e+00 427 2002 12 6.56945e+00 3.07441e+00 332 2003 1 7.43969e+00 2.96693e+00 482 2003 2 5.12418e+00 1.51306e+00 388 2003 3 nan nan 0 2003 4 3.12999e+01 1.06248e+01 21 2003 5 2.04403e+01 8.78791e+00 36 2003 6 2.91191e+01 1.49937e+00 2 2003 7 2.00723e+01 7.41164e+00 5 2003 8 3.30657e+01 7.25214e+00 19 2003 9 1.51307e+01 9.91662e+00 166 2003 10 9.73989e+00 4.24283e+00 273 2003 11 8.02269e+00 2.19036e+00 406 2003 12 5.23170e+00 2.12075e+00 345 2004 1 5.27892e+00 1.30615e+00 424 2004 2 4.70006e+00 1.55286e+00 232 2004 3 1.18686e+01 6.00800e+00 460 2004 4 5.08472e+00 1.29355e+00 242 2004 5 5.87790e+00 1.34997e+00 144 2004 6 6.83045e+00 4.35589e+00 184 2004 7 5.80625e+00 2.78540e+00 135 2004 8 6.70598e+00 1.28411e+00 107 2004 9 8.79068e+00 1.94207e+00 63 2004 10 1.32993e+01 1.12864e+00 8 2004 11 3.75834e+01 9.57901e+00 5 2004 12 1.32389e+01 6.40786e+00 149 2005 1 1.13900e+01 5.62041e+00 223 2005 2 1.14492e+01 5.30277e+00 236 2005 3 7.16148e+00 3.63406e+00 201 2005 4 1.91052e+01 5.67094e+00 112 2005 5 1.14117e+01 6.37547e+00 27 2005 6 2.78901e+01 5.44220e+00 13 2005 7 3.14162e+01 1.04142e+01 11 2005 8 1.71537e+01 5.72001e+00 57 2005 9 1.32295e+01 2.89141e+00 101 2005 10 6.82539e+00 2.02972e+00 265 2005 11 5.53692e+00 1.58056e+00 347 2005 12 6.25799e+00 2.77002e+00 272 2006 1 1.16993e+01 4.64629e+00 253 2006 2 9.33749e+00 1.79888e+00 132 2006 3 1.82129e+01 9.41050e+00 354 2006 4 6.43058e+00 2.09205e+00 188 2006 5 4.15386e+00 1.81960e+00 183 2006 6 7.25152e+00 6.60244e+00 124 2006 7 1.18047e+01 4.39418e+00 14 2006 8 8.43194e+00 4.56724e+00 112 2006 9 7.61399e+00 2.69576e+00 358 2006 10 7.18603e+00 3.09349e+00 313 2006 11 4.94064e+00 1.93486e+00 380 2006 12 5.30352e+00 3.45925e+00 292 2007 1 5.09425e+00 3.10447e+00 232 2007 2 3.20711e+00 1.44020e+00 426 2007 3 3.30623e+00 1.24716e+00 541 2007 4 4.37056e+00 1.80368e+00 325 2007 5 3.02006e+00 6.92411e-01 51 2007 6 5.37926e+00 2.36166e+00 109 2007 7 7.59085e+00 6.17905e+00 138 2007 8 8.34386e+00 2.25530e+00 145 2007 9 7.10663e+00 2.23559e+00 105 2007 10 6.10286e+00 2.80784e+00 311 2007 11 5.08060e+00 2.54585e+00 488 2007 12 3.67355e+00 1.77847e+00 249 2008 1 3.97224e+00 2.66537e+00 302 2008 2 4.39000e+00 1.47603e+00 435 2008 3 1.10675e+01 1.03898e+01 268 2008 4 2.02526e+01 9.74807e+00 84 2008 5 8.69706e+00 2.85881e+00 142 2008 6 7.62926e+00 2.67458e+00 107 2008 7 8.12766e+00 3.94489e+00 51 2008 8 1.01823e+01 6.30610e+00 42 2008 9 1.24682e+01 4.88422e+00 121 2008 10 1.29054e+01 6.37026e+00 376 2008 11 5.94024e+00 2.43250e+00 473 2008 12 7.79310e+00 3.69406e+00 418 2009 1 7.33898e+00 3.13560e+00 304 2009 2 5.13062e+00 2.59908e+00 496 2009 3 3.38814e+00 8.50664e-01 401 2009 4 9.69027e+00 5.37577e+00 187 2009 5 1.81016e+01 4.82467e+00 41 2009 6 8.35645e+00 2.52026e+00 38 2009 7 4.57949e+00 1.12972e+00 52 2009 8 1.59062e+01 4.81451e+00 154 2009 9 1.10031e+01 5.34631e+00 307 2009 10 7.33475e+00 2.15227e+00 489 2009 11 4.86658e+00 1.52237e+00 296 2009 12 5.64753e+00 2.23188e+00 158 2010 1 5.47130e+00 2.66173e+00 554 2010 2 1.19506e+01 5.91058e+00 246 2010 3 1.97642e+01 9.73749e+00 268 2010 4 2.28586e+01 9.26137e+00 158 2010 5 1.29570e+01 8.02501e+00 258 2010 6 9.39608e+00 3.68974e+00 206 2010 7 1.19501e+01 3.29357e+00 93 2010 8 8.55407e+00 2.51361e+00 34 2010 9 1.41748e+01 6.64132e+00 213 2010 10 7.05945e+00 3.76913e+00 782 2010 11 5.54401e+00 2.65252e+00 731 2010 12 4.08476e+00 1.88722e+00 402 2011 1 3.82134e+00 2.25977e+00 408 2011 2 3.15544e+00 1.25055e+00 422 2011 3 5.62652e+00 2.40139e+00 458 2011 4 5.27418e+00 2.23801e+00 313 2011 5 3.79792e+00 1.82826e+00 237 2011 6 3.88521e+00 1.24765e+00 45 2011 7 7.73283e+00 3.17222e+00 97 2011 8 4.23620e+00 3.40721e+00 152 2011 9 6.66961e+00 1.93588e+00 457 2011 10 5.88931e+00 2.55454e+00 407 2011 11 4.54913e+00 1.68323e+00 537 2011 12 4.47817e+00 2.65874e+00 548 2012 1 3.79241e+00 2.03782e+00 487 2012 2 5.30235e+00 9.04824e-01 46 2012 3 3.27122e+00 1.37143e+00 428 2012 4 4.30089e+00 2.16140e+00 274 2012 5 3.24901e+00 6.52947e-01 186 2012 6 5.85814e+00 1.37067e+00 3 2012 7 9.81432e+00 6.84275e+00 31 2012 8 6.41775e+00 1.10468e+01 12 2012 9 2.32708e+01 8.99656e+00 69 2012 10 1.88887e+01 6.19237e+00 74 2012 11 6.46860e+00 1.79891e+00 384 2012 12 5.90065e+00 2.06043e+00 203 2013 1 6.46020e+00 3.49850e+00 384 2013 2 5.17723e+00 1.93296e+00 173 2013 3 5.06290e+00 2.12754e+00 316 2013 4 2.35571e+01 1.19991e+01 106 2013 5 8.89257e+00 1.62720e+00 93 2013 6 2.09625e+01 1.23177e+01 66 2013 7 3.53922e+01 1.07527e+01 8 2013 8 nan nan 0 2013 9 2.47288e+01 8.29722e+00 114 2013 10 1.40644e+01 7.40448e+00 347 2013 11 8.94123e+00 2.65671e+00 162 2013 12 7.48984e+00 1.94967e+00 337 2014 1 7.77554e+00 2.53847e+00 184 2014 2 7.74931e+00 3.49047e+00 376 2014 3 8.61441e+00 1.74742e+00 331 2014 4 1.71335e+01 1.01249e+01 103 2014 5 1.53741e+01 3.38028e+00 60 2014 6 1.08627e+01 1.76247e+00 16 2014 7 1.31526e+01 3.69661e+00 193 2014 8 1.00293e+01 2.58983e+00 107 2014 9 8.71589e+00 4.02956e-01 2 2014 10 7.66732e+00 3.08431e+00 624 2014 11 5.87542e+00 1.84161e+00 399 2014 12 5.88041e+00 3.00829e+00 200 2015 1 5.21507e+00 1.48375e+00 397 2015 2 5.48676e+00 1.12687e+00 373 2015 3 1.48846e+01 6.79181e+00 328 2015 4 1.61293e+01 7.03002e+00 48 2015 5 9.60240e+00 2.72342e+00 173 2015 6 8.25964e+00 1.89670e+00 109 2015 7 8.40888e+00 1.54836e+00 24 2015 8 2.20144e+01 3.95739e+00 3 2015 9 1.22003e+01 7.64167e+00 48 2015 10 7.04093e+00 2.37419e+00 371 2015 11 1.09765e+01 6.46652e+00 241 2015 12 7.97885e+00 4.91814e+00 322 2016 1 6.25283e+00 2.18603e+00 216 2016 2 7.59053e+00 5.03076e+00 394 2016 3 9.86184e+00 6.34145e+00 298 2016 4 1.39487e+01 7.18067e+00 158 2016 5 9.65956e+00 2.74908e+00 275 2016 6 6.41211e+00 1.67854e+00 301 2016 7 9.63117e+00 4.18279e+00 218 2016 8 1.26343e+01 5.78083e+00 175 2016 9 1.30939e+01 9.54800e+00 257 2016 10 7.96858e+00 3.13509e+00 337 2016 11 5.45060e+00 1.78033e+00 431 2016 12 4.82768e+00 1.88435e+00 206 2017 1 5.16079e+00 3.02492e+00 307 2017 2 7.13611e+00 2.59259e+00 567 2017 3 7.02870e+00 3.08158e+00 427 2017 4 5.43336e+00 1.59532e+00 340 2017 5 4.34742e+00 1.23021e+00 83 2017 6 7.59016e+00 1.29924e+00 118 2017 7 8.66955e+00 1.39615e+00 38 2017 8 1.37919e+01 7.50936e+00 205 2017 9 8.56104e+00 2.69536e+00 250 2017 10 1.18455e+01 4.20386e+00 53 2017 11 8.83987e+00 3.81827e+00 650 2017 12 5.06272e+00 1.49389e+00 341 2018 1 5.63767e+00 2.37251e+00 293 2018 2 1.16278e+01 6.41091e+00 490 2018 3 7.89434e+00 4.51333e+00 396 2018 4 5.88397e+00 1.33017e+00 188 2018 5 5.17317e+00 2.38549e+00 119 2018 6 6.80827e+00 1.68377e+00 132 2018 7 1.37567e+01 5.33581e+00 34 2018 8 nan nan 0 2018 9 1.87424e+01 7.25263e+00 322 2018 10 9.95872e+00 3.56791e+00 329 2018 11 8.15875e+00 4.46913e+00 125 2018 12 1.06235e+01 5.25333e+00 212 2019 1 1.87404e+01 7.56205e+00 114 2019 2 nan nan 0 2019 3 1.50448e+01 4.36866e+00 228 2019 4 1.12173e+01 3.37918e+00 137 2019 5 1.07261e+01 3.48913e+00 149 2019 6 5.91760e+00 6.11108e-01 42 2019 7 1.13366e+01 2.84945e-01 6 2019 8 9.32377e+00 5.44973e+00 84 2019 9 9.64209e+00 3.75349e+00 169 2019 10 9.86686e+00 2.07673e+00 284 2019 11 6.25365e+00 2.02715e+00 328 2019 12 9.14544e+00 3.48971e+00 116 2020 1 7.22106e+00 3.10303e+00 264 2020 2 1.02274e+01 2.20957e+00 61 2020 3 1.03888e+01 3.61300e+00 310 2020 4 7.95159e+00 2.51711e+00 127 2020 5 1.08643e+01 3.81161e+00 240 2020 6 9.08087e+00 2.93594e+00 232 2020 7 1.45099e+01 8.16574e+00 86 2020 8 1.18916e+01 1.35487e+00 49 2020 9 1.40276e+01 4.95805e+00 114 2020 10 1.06962e+01 4.14524e+00 257 2020 11 8.41378e+00 1.96752e+00 251 2020 12 5.74806e+00 4.53455e+00 219 2021 1 6.13840e+00 2.36740e+00 82 2021 2 1.12888e+01 3.61960e+00 231 2021 3 1.19965e+01 3.19008e+00 282 2021 4 1.43396e+01 5.04932e+00 230 2021 5 1.32765e+01 5.20381e+00 215 2021 6 1.09420e+01 3.38526e+00 56 2021 7 1.39697e+01 3.20003e+00 5 2021 8 1.55351e+01 3.12524e+00 28 2021 9 2.26220e+01 8.74733e+00 55 2021 10 1.52314e+01 5.75996e+00 191 2021 11 6.77583e+00 1.38820e+00 437 2021 12 9.18791e+00 4.34897e+00 356 2022 1 8.91317e+00 2.43879e+00 167 2022 2 8.42042e+00 3.30116e+00 447 2022 3 8.25213e+00 3.97448e+00 358 2022 4 nan nan 0 2022 5 1.30938e+01 3.26680e+00 167 2022 6 1.20755e+01 5.97328e+00 133 2022 7 1.35597e+01 7.10586e+00 157 2022 8 1.00833e+01 3.38647e+00 139 2022 9 8.58346e+00 3.04669e+00 144 2022 10 4.42486e+00 1.70126e+00 838 2022 11 7.50362e+00 2.43920e+00 293 2022 12 7.91590e+00 4.94108e+00 526 2023 1 6.40591e+00 3.15103e+00 529 2023 2 9.22574e+00 4.48372e+00 376 2023 3 1.35455e+01 7.42304e+00 332 2023 4 1.12277e+01 5.35969e+00 387 2023 5 7.16555e+00 1.31351e+00 166 2023 6 6.81873e+00 1.85371e+00 115 2023 7 1.10888e+01 6.68696e+00 172 2023 8 1.09076e+01 4.23194e+00 220 2023 9 1.48212e+01 8.35683e+00 255 2023 10 1.09617e+01 6.69548e+00 307 2023 11 7.30831e+00 2.66655e+00 438 2023 12 8.41945e+00 7.00340e+00 87 2024 1 1.46893e+01 7.27310e+00 120 2024 2 1.78143e+01 7.88770e+00 457 2024 3 1.93660e+01 7.62853e+00 197 2024 4 nan nan 0