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 1.96815e+01 3.86123e+00 123 2002 8 1.40488e+01 2.47224e+00 80 2002 9 8.44831e+00 5.24813e+00 64 2002 10 5.33654e+00 5.50407e+00 145 2002 11 3.37735e+00 2.50744e+00 189 2002 12 3.20263e+00 2.48671e+00 200 2003 1 1.52773e+00 1.45821e+00 228 2003 2 3.18597e+00 1.55464e+00 144 2003 3 2.11982e+00 2.60844e+00 111 2003 4 4.08482e+00 2.91240e+00 192 2003 5 1.27580e+01 3.44724e+00 96 2003 6 3.02104e+00 1.49438e+00 64 2003 7 6.07685e+00 2.39137e+00 74 2003 8 6.59892e+00 2.73092e+00 128 2003 9 4.26499e+00 3.86745e+00 115 2003 10 5.79058e+00 4.34395e+00 192 2003 11 9.78738e+00 4.06528e+00 186 2003 12 2.00474e+00 1.29622e+00 208 2004 1 6.03575e+00 1.09373e+00 144 2004 2 5.18293e+00 3.88748e-01 63 2004 3 6.54091e+00 2.21453e+00 183 2004 4 8.81674e+00 4.44976e+00 190 2004 5 1.50631e+01 3.06145e+00 239 2004 6 7.49414e+00 1.26568e+00 64 2004 7 5.41756e+00 4.17844e-01 48 2004 8 7.74498e+00 3.25248e+00 88 2004 9 5.22518e+00 4.81183e+00 164 2004 10 5.03512e+00 3.80990e+00 105 2004 11 3.06886e+00 1.42122e+00 127 2004 12 9.52753e-01 4.71546e-01 128 2005 1 2.03880e+00 8.61174e-01 144 2005 2 1.67528e+00 6.45000e-01 107 2005 3 3.05560e+00 2.20414e+00 183 2005 4 3.98166e+00 2.03908e+00 96 2005 5 6.22798e+00 1.87565e+00 147 2005 6 9.80509e+00 4.87460e+00 96 2005 7 6.50640e+00 3.17165e+00 96 2005 8 1.07561e+01 3.11685e+00 96 2005 9 1.50307e+00 1.70716e+00 178 2005 10 3.07530e+00 1.86809e+00 208 2005 11 4.65880e+00 2.73064e+00 208 2005 12 3.95733e+00 6.52901e-01 128 2006 1 4.25234e+00 2.25715e+00 176 2006 2 2.22609e+00 9.24186e-01 144 2006 3 9.42680e+00 4.48492e+00 234 2006 4 1.70599e+01 4.28063e+00 179 2006 5 1.18624e+01 4.81914e+00 176 2006 6 7.20840e+00 5.72085e+00 176 2006 7 1.80155e+01 1.87141e+00 85 2006 8 1.50619e+01 4.36984e+00 176 2006 9 1.02320e+01 2.63756e+00 144 2006 10 8.76445e+00 4.19303e+00 239 2006 11 2.76805e+00 1.54805e+00 224 2006 12 6.42022e+00 2.31571e+00 192 2007 1 3.70914e+00 2.22064e+00 96 2007 2 3.95068e+00 3.20392e+00 129 2007 3 8.06177e+00 4.68335e+00 176 2007 4 9.64237e+00 7.72370e+00 160 2007 5 1.54294e+01 2.62023e+00 176 2007 6 1.61791e+01 3.29585e+00 143 2007 7 1.21674e+01 5.23781e+00 112 2007 8 1.53624e+01 1.80907e+00 112 2007 9 9.27101e+00 2.21982e+00 64 2007 10 3.65027e+00 2.32228e+00 206 2007 11 4.12347e+00 1.39577e+00 224 2007 12 6.44836e+00 2.92548e+00 80 2008 1 3.50091e+00 1.58144e+00 160 2008 2 4.65896e+00 2.57306e+00 239 2008 3 3.22225e+00 1.85542e+00 144 2008 4 9.04817e+00 2.86879e+00 160 2008 5 8.16917e+00 3.72450e+00 137 2008 6 4.28514e+00 2.82530e+00 180 2008 7 2.71876e+00 1.36838e+00 108 2008 8 6.08090e+00 1.91048e+00 127 2008 9 4.73145e+00 3.05037e+00 145 2008 10 2.35622e+00 9.70033e-01 208 2008 11 4.86973e+00 2.36613e+00 269 2008 12 3.52151e+00 2.09733e+00 82 2009 1 3.53827e+00 3.29097e+00 145 2009 2 1.77575e+00 5.35722e-01 160 2009 3 7.58773e+00 5.17914e+00 160 2009 4 5.21100e+00 2.28147e+00 128 2009 5 6.18440e+00 2.77163e+00 128 2009 6 4.95715e+00 1.72817e+00 144 2009 7 1.18510e+01 1.18016e+00 71 2009 8 1.01947e+01 2.75087e+00 100 2009 9 1.27316e+01 1.78089e+00 128 2009 10 7.34872e+00 4.32713e+00 173 2009 11 6.82823e+00 2.87440e+00 144 2009 12 2.26847e+00 9.06090e-01 64 2010 1 3.02705e+00 9.23548e-01 160 2010 2 1.04918e+00 1.38032e+00 128 2010 3 1.21160e+00 1.43395e+00 144 2010 4 1.93426e+00 1.01726e+00 204 2010 5 7.12615e+00 2.32172e+00 135 2010 6 6.20804e+00 1.50309e+00 160 2010 7 1.06691e+01 2.31458e+00 64 2010 8 1.21722e+01 1.87336e+00 32 2010 9 8.17418e+00 3.93411e+00 208 2010 10 8.62811e+00 2.26268e+00 296 2010 11 6.25524e+00 1.46664e+00 156 2010 12 2.26395e+00 1.61120e+00 176 2011 1 1.66220e+00 1.80818e+00 176 2011 2 3.40118e+00 3.07053e+00 188 2011 3 9.33723e+00 3.73301e+00 192 2011 4 1.02991e+01 2.25430e+00 160 2011 5 8.74495e+00 4.38434e+00 160 2011 6 4.31113e+00 2.90816e+00 128 2011 7 6.39905e+00 1.93866e+00 96 2011 8 3.77199e+00 2.80372e+00 168 2011 9 4.34731e+00 2.07277e+00 176 2011 10 6.04746e+00 2.80367e+00 332 2011 11 4.04413e+00 5.35635e-01 203 2011 12 5.47504e+00 1.60502e+00 144 2012 1 4.34821e+00 1.96483e+00 193 2012 2 4.46018e+00 2.02665e-01 32 2012 3 1.09935e+01 4.77932e+00 192 2012 4 1.57974e+01 4.37410e+00 192 2012 5 1.86137e+01 3.11182e+00 175 2012 6 8.30268e+00 8.36058e+00 80 2012 7 1.76398e+01 2.52703e+00 104 2012 8 5.89872e+00 1.29681e+00 36 2012 9 6.92184e+00 4.79268e+00 144 2012 10 7.99128e+00 3.44843e+00 302 2012 11 5.65920e+00 2.52914e+00 285 2012 12 5.18489e+00 9.06767e-01 64 2013 1 5.50582e+00 1.35810e+00 112 2013 2 6.23833e+00 1.44797e+00 110 2013 3 1.15979e+00 9.49173e-01 203 2013 4 7.23305e+00 2.63420e+00 57 2013 5 7.01302e+00 3.03152e+00 160 2013 6 9.98568e+00 1.48017e+00 40 2013 7 6.48491e+00 3.15530e+00 64 2013 8 5.08351e+00 3.48731e+00 144 2013 9 7.27941e+00 2.98652e+00 212 2013 10 5.96509e+00 2.37428e+00 210 2013 11 5.88730e+00 1.96408e+00 136 2013 12 5.86141e+00 1.19764e+00 113 2014 1 3.61786e+00 1.95646e+00 102 2014 2 3.83060e+00 2.50459e+00 160 2014 3 4.21624e+00 1.80896e+00 160 2014 4 5.04511e+00 2.23771e+00 128 2014 5 1.28392e+00 1.03081e+00 160 2014 6 8.18118e+00 5.02878e+00 169 2014 7 5.85002e+00 4.02341e+00 128 2014 8 1.15726e+01 1.65575e+00 146 2014 9 1.54384e+01 2.01462e+00 176 2014 10 7.82313e+00 2.85574e+00 316 2014 11 4.16316e+00 2.89903e+00 244 2014 12 3.71913e+00 1.45709e+00 192 2015 1 3.01954e+00 2.06817e+00 128 2015 2 4.57410e+00 1.29734e+00 176 2015 3 7.41501e+00 2.69821e+00 160 2015 4 7.85984e+00 3.04040e+00 42 2015 5 1.41341e+01 6.07364e+00 186 2015 6 1.40019e+01 4.00972e+00 165 2015 7 5.95033e+00 3.51356e+00 110 2015 8 1.26780e+01 3.58193e+00 128 2015 9 1.06492e+01 4.69388e+00 134 2015 10 2.44057e+00 2.16839e+00 192 2015 11 3.15469e+00 1.11388e+00 181 2015 12 3.30954e+00 5.18435e-01 96 2016 1 2.03007e+00 1.40939e+00 128 2016 2 1.73201e+00 1.47101e+00 208 2016 3 2.54644e+00 1.93303e+00 129 2016 4 2.58863e+00 1.85108e+00 128 2016 5 6.38717e+00 3.94034e+00 176 2016 6 6.66255e+00 6.05239e+00 144 2016 7 1.64247e+00 1.41508e+00 135 2016 8 8.79287e+00 2.33949e+00 125 2016 9 1.07182e+01 3.03663e+00 160 2016 10 9.45762e+00 2.77560e+00 304 2016 11 8.39089e+00 2.77285e+00 237 2016 12 7.17617e+00 1.08422e+00 185 2017 1 5.45895e+00 3.94456e+00 165 2017 2 2.34893e+00 9.41395e-01 272 2017 3 6.56535e+00 3.18387e+00 208 2017 4 5.14853e+00 1.55199e+00 112 2017 5 4.71293e+00 5.52242e+00 112 2017 6 7.09789e+00 1.53462e+00 64 2017 7 9.09340e+00 4.33814e+00 112 2017 8 6.26046e+00 3.25346e+00 96 2017 9 5.04528e+00 2.40081e+00 144 2017 10 2.10555e+00 1.54973e+00 224 2017 11 5.66604e+00 3.17509e+00 232 2017 12 3.39641e+00 1.45860e+00 128 2018 1 3.34282e+00 1.89176e+00 186 2018 2 1.26644e+01 3.51552e+00 118 2018 3 8.91761e+00 5.07041e+00 192 2018 4 1.30232e+01 4.78904e+00 200 2018 5 8.58304e+00 1.94444e+00 120 2018 6 6.86116e+00 3.27229e+00 102 2018 7 8.47953e+00 1.63045e+00 80 2018 8 9.64526e+00 2.72605e+00 96 2018 9 1.15561e+01 4.15437e+00 190 2018 10 4.64684e+00 5.35046e+00 272 2018 11 2.63721e+00 1.63756e+00 90 2018 12 1.55770e+00 7.42510e-01 96 2019 1 9.66092e-01 1.07708e+00 208 2019 2 6.75706e-01 5.97066e-01 70 2019 3 1.98626e+00 1.51354e+00 176 2019 4 5.63676e+00 2.09256e+00 96 2019 5 8.98939e+00 2.27463e+00 224 2019 6 6.21110e+00 4.75160e+00 80 2019 7 3.29950e+00 1.96143e+00 157 2019 8 7.74006e+00 1.03888e+00 96 2019 9 4.46431e+00 2.91932e+00 272 2019 10 7.88723e+00 5.16110e+00 144 2019 11 2.15406e+00 1.37594e+00 208 2019 12 1.93685e+00 5.70168e-01 104 2020 1 4.61815e+00 9.49966e-01 112 2020 2 3.09182e+00 1.33674e+00 128 2020 3 1.17625e+01 4.91083e+00 202 2020 4 2.52543e+00 2.36639e+00 128 2020 5 1.70213e+00 1.19372e+00 108 2020 6 9.27329e+00 3.72282e+00 140 2020 7 1.02300e+01 6.05850e+00 64 2020 8 1.13138e+01 1.92246e+00 84 2020 9 2.97070e+00 2.01946e+00 112 2020 10 1.65685e+00 1.37711e+00 202 2020 11 1.36276e+00 9.61923e-01 272 2020 12 3.49544e+00 1.53363e+00 256 2021 1 3.74624e+00 2.43937e+00 128 2021 2 2.48634e+00 1.22892e+00 112 2021 3 6.20802e+00 3.85025e+00 128 2021 4 8.66039e+00 1.98809e+00 176 2021 5 1.32756e+01 4.85243e+00 144 2021 6 1.09700e+01 2.72734e+00 64 2021 7 8.45228e+00 3.42111e+00 160 2021 8 1.03340e+01 2.26146e+00 137 2021 9 4.10777e+00 3.47220e+00 160 2021 10 1.92505e+00 2.19510e+00 144 2021 11 3.34026e+00 1.82224e+00 192 2021 12 6.73090e+00 1.71592e+00 128 2022 1 3.67541e+00 2.23682e+00 163 2022 2 7.20632e+00 4.55913e+00 160 2022 3 9.06935e+00 2.71501e+00 218 2022 4 1.21850e+01 3.33830e-01 48 2022 5 1.41211e+01 5.16321e+00 128 2022 6 2.11189e+01 3.17867e+00 144 2022 7 1.47682e+01 7.10859e+00 120 2022 8 3.40979e+00 2.32326e+00 136 2022 9 8.47298e+00 4.09226e+00 176 2022 10 6.45652e+00 2.63774e+00 290 2022 11 6.59717e+00 2.17928e+00 160 2022 12 8.44257e+00 2.91441e+00 175 2023 1 6.49617e+00 2.10487e+00 232 2023 2 7.08933e+00 2.32234e+00 135 2023 3 5.97021e+00 1.33646e+00 121 2023 4 1.10189e+01 3.14845e+00 96 2023 5 1.42465e+01 2.95153e+00 80 2023 6 1.29240e+01 2.67395e+00 80 2023 7 6.99542e+00 2.51534e+00 96 2023 8 3.34488e+00 2.71966e+00 185 2023 9 4.22036e+00 2.57783e+00 112 2023 10 4.65909e+00 2.49911e+00 232 2023 11 2.32016e+00 1.01525e+00 176 2023 12 3.55370e+00 8.96110e-01 64 2024 1 2.43716e+00 1.76315e+00 105 2024 2 1.87341e+00 7.06972e-01 128 2024 3 5.68013e+00 1.26520e+00 80 2024 4 nan nan 0