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 1.34472e+01 1.92909e+00 112 2002 8 8.71607e+00 1.43827e+00 111 2002 9 7.36334e+00 3.72677e+00 80 2002 10 6.76741e+00 4.79779e+00 144 2002 11 4.05079e+00 2.26148e+00 160 2002 12 2.06714e+00 1.98345e+00 160 2003 1 5.68456e-01 8.14614e-01 255 2003 2 1.45295e+00 8.75437e-01 113 2003 3 2.03215e+00 1.96289e+00 99 2003 4 1.20142e+00 7.42943e-01 125 2003 5 6.84788e+00 1.82921e+00 64 2003 6 6.28877e-01 4.75056e-01 64 2003 7 2.32436e+00 1.17853e+00 112 2003 8 2.36049e+00 1.20993e+00 74 2003 9 2.59314e+00 1.57019e+00 145 2003 10 4.57574e+00 2.30541e+00 192 2003 11 6.42794e+00 2.96553e+00 227 2003 12 1.84440e+00 1.41122e+00 192 2004 1 3.04550e+00 1.37102e+00 133 2004 2 3.52999e+00 2.27492e+00 80 2004 3 3.31663e+00 2.55749e+00 261 2004 4 3.48370e+00 1.39362e+00 144 2004 5 1.09487e+01 3.85940e+00 188 2004 6 2.43665e+00 1.22219e+00 62 2004 7 6.94918e+00 1.62557e+00 48 2004 8 2.79813e+00 1.48601e+00 96 2004 9 2.76131e+00 2.46818e+00 189 2004 10 3.72870e+00 3.22198e+00 96 2004 11 2.48035e+00 2.00494e+00 112 2004 12 1.41742e+00 5.36179e-01 116 2005 1 1.61675e+00 9.39605e-01 160 2005 2 1.56100e+00 1.10619e+00 128 2005 3 1.78897e+00 7.90778e-01 168 2005 4 3.19982e+00 1.99422e+00 128 2005 5 4.72365e+00 1.76291e+00 120 2005 6 5.83027e+00 3.21851e+00 112 2005 7 6.54899e+00 4.70263e+00 144 2005 8 5.39969e+00 3.50007e+00 48 2005 9 2.66941e+00 1.48779e+00 192 2005 10 5.93584e+00 2.66168e+00 268 2005 11 3.84862e+00 2.16487e+00 246 2005 12 1.88557e+00 1.01951e+00 128 2006 1 1.95586e+00 1.36865e+00 144 2006 2 1.43200e+00 8.29355e-01 174 2006 3 5.02454e+00 2.10330e+00 194 2006 4 1.02036e+01 2.87874e+00 176 2006 5 4.76923e+00 2.90787e+00 160 2006 6 4.86891e+00 3.31035e+00 176 2006 7 1.13965e+01 2.23972e+00 56 2006 8 1.28475e+01 3.50600e+00 146 2006 9 7.93597e+00 2.51323e+00 158 2006 10 5.34283e+00 1.96229e+00 254 2006 11 3.32701e+00 1.92452e+00 224 2006 12 3.08547e+00 1.26691e+00 164 2007 1 2.88585e+00 1.95475e+00 92 2007 2 2.82108e+00 9.99019e-01 112 2007 3 4.04175e+00 2.25638e+00 256 2007 4 5.85282e+00 3.06512e+00 144 2007 5 8.05453e+00 2.87519e+00 96 2007 6 1.24754e+01 2.51323e+00 127 2007 7 8.57697e+00 2.56008e+00 112 2007 8 9.78352e+00 1.45333e+00 49 2007 9 7.48640e+00 3.59468e+00 113 2007 10 3.05564e+00 1.46628e+00 208 2007 11 3.23766e+00 9.61216e-01 240 2007 12 3.61533e+00 9.81848e-01 106 2008 1 2.36995e+00 9.95816e-01 128 2008 2 3.79058e+00 2.36403e+00 228 2008 3 2.04529e+00 1.65612e+00 145 2008 4 5.84321e+00 3.85332e+00 128 2008 5 4.47861e+00 2.66425e+00 99 2008 6 7.74747e-01 9.22581e-01 127 2008 7 7.21525e-01 3.97161e-01 76 2008 8 3.18552e+00 5.71463e-01 96 2008 9 6.16754e+00 2.93507e+00 190 2008 10 3.30246e+00 2.13047e+00 184 2008 11 3.80727e+00 1.46921e+00 256 2008 12 3.34041e+00 1.19340e+00 126 2009 1 1.52718e+00 1.28764e+00 208 2009 2 1.54314e+00 1.26849e+00 146 2009 3 3.59220e+00 2.55554e+00 149 2009 4 1.74453e+00 1.62824e+00 128 2009 5 6.11160e+00 2.82042e+00 128 2009 6 1.60776e+00 1.69404e+00 160 2009 7 4.68692e+00 1.72422e+00 80 2009 8 6.85227e+00 1.77667e+00 112 2009 9 8.65182e+00 1.62958e+00 162 2009 10 5.51220e+00 3.07022e+00 161 2009 11 4.91854e+00 2.13842e+00 160 2009 12 1.43827e+00 5.99565e-01 64 2010 1 1.69027e+00 8.52096e-01 145 2010 2 5.28094e-01 1.01613e+00 113 2010 3 2.49578e-01 5.94649e-01 160 2010 4 1.14089e+00 7.08770e-01 176 2010 5 2.71056e+00 1.25246e+00 137 2010 6 1.24669e+00 9.86559e-01 176 2010 7 6.92988e+00 1.93213e+00 119 2010 8 3.40269e+00 7.63551e-01 48 2010 9 2.65889e+00 1.06329e+00 220 2010 10 6.11960e+00 2.30900e+00 332 2010 11 3.22929e+00 1.70553e+00 193 2010 12 1.23026e+00 1.16220e+00 208 2011 1 1.25032e+00 1.07913e+00 157 2011 2 1.84402e+00 1.09539e+00 192 2011 3 3.69164e+00 1.98477e+00 192 2011 4 5.14800e+00 1.13691e+00 128 2011 5 4.61825e+00 3.82100e+00 192 2011 6 1.26502e+00 1.41587e+00 130 2011 7 2.11954e+00 1.33813e+00 119 2011 8 1.36949e+00 1.20256e+00 184 2011 9 2.19667e+00 1.44007e+00 195 2011 10 4.45627e+00 1.86000e+00 293 2011 11 2.38858e+00 6.68294e-01 113 2011 12 2.58745e+00 1.99533e+00 157 2012 1 1.99907e+00 1.33523e+00 192 2012 2 2.83723e+00 7.81526e-01 39 2012 3 8.01351e+00 3.97817e+00 176 2012 4 9.19399e+00 3.21624e+00 176 2012 5 1.28445e+01 3.53823e+00 144 2012 6 8.47121e+00 1.78975e+00 96 2012 7 9.38997e+00 1.25864e+00 64 2012 8 4.62335e+00 1.47782e+00 65 2012 9 6.34373e+00 2.92660e+00 151 2012 10 4.98892e+00 1.85781e+00 254 2012 11 2.03820e+00 1.10017e+00 251 2012 12 4.12348e+00 1.76838e+00 96 2013 1 3.24885e+00 9.08520e-01 96 2013 2 2.09256e+00 7.92243e-01 96 2013 3 7.03891e-01 9.16653e-01 186 2013 4 9.73877e+00 4.44715e+00 96 2013 5 5.63443e+00 3.49893e+00 160 2013 6 5.05051e+00 3.15168e+00 92 2013 7 2.40906e+00 1.45578e+00 96 2013 8 1.35123e+00 1.42315e+00 130 2013 9 4.18620e+00 3.39148e+00 170 2013 10 5.78139e+00 1.86152e+00 164 2013 11 3.57820e+00 1.23257e+00 144 2013 12 3.61324e+00 1.26161e+00 112 2014 1 3.00929e+00 2.17168e+00 128 2014 2 1.66850e+00 1.57558e+00 160 2014 3 2.60346e+00 9.69590e-01 146 2014 4 5.93078e+00 3.24685e+00 103 2014 5 1.15509e+00 8.44782e-01 176 2014 6 1.41689e+00 1.30149e+00 176 2014 7 1.39973e+00 1.51112e+00 76 2014 8 5.95037e+00 1.44968e+00 160 2014 9 9.50083e+00 2.22308e+00 147 2014 10 7.25589e+00 2.24726e+00 304 2014 11 2.85951e+00 1.50185e+00 208 2014 12 3.01587e+00 1.56839e+00 176 2015 1 2.36515e+00 1.21102e+00 137 2015 2 2.16396e+00 1.08628e+00 164 2015 3 4.54349e+00 1.84710e+00 80 2015 4 8.57603e+00 9.70090e-01 37 2015 5 1.23356e+01 3.04444e+00 190 2015 6 7.75167e+00 3.16673e+00 176 2015 7 3.50250e+00 2.12023e+00 156 2015 8 6.80667e+00 1.95176e+00 144 2015 9 7.68390e+00 4.94667e-01 142 2015 10 3.20255e+00 2.65400e+00 208 2015 11 2.47025e+00 1.61359e+00 152 2015 12 1.99097e+00 8.19709e-01 112 2016 1 1.62905e+00 7.56424e-01 144 2016 2 4.62938e-01 5.44250e-01 253 2016 3 7.89595e-01 7.44117e-01 112 2016 4 8.56984e-01 7.69086e-01 144 2016 5 2.70001e+00 1.96464e+00 176 2016 6 5.05552e+00 4.40266e+00 150 2016 7 9.69685e-02 1.16646e-01 144 2016 8 5.52701e+00 1.76140e+00 128 2016 9 6.69988e+00 2.12098e+00 184 2016 10 7.40910e+00 1.81948e+00 272 2016 11 6.36275e+00 2.08148e+00 224 2016 12 3.69116e+00 7.88879e-01 176 2017 1 2.70139e+00 1.50579e+00 144 2017 2 1.32494e+00 7.53286e-01 208 2017 3 3.31512e+00 1.73415e+00 176 2017 4 3.53764e+00 2.70466e+00 148 2017 5 1.67740e+00 3.21824e+00 128 2017 6 3.77091e+00 1.44945e+00 57 2017 7 2.88289e+00 1.88209e+00 176 2017 8 2.12973e+00 2.13809e+00 80 2017 9 1.60940e+00 8.47095e-01 139 2017 10 2.05465e+00 1.43705e+00 219 2017 11 5.58746e+00 1.83985e+00 209 2017 12 2.26177e+00 9.34154e-01 112 2018 1 1.47854e+00 9.83064e-01 185 2018 2 6.83873e+00 3.62391e+00 80 2018 3 7.19702e+00 3.18445e+00 176 2018 4 7.19947e+00 3.19973e+00 203 2018 5 3.40864e+00 2.25661e+00 129 2018 6 1.73481e+00 1.14953e+00 80 2018 7 2.68658e+00 5.82543e-01 80 2018 8 3.80007e+00 1.16209e+00 160 2018 9 6.95751e+00 2.38820e+00 207 2018 10 3.75118e+00 3.91001e+00 270 2018 11 1.40309e+00 1.43349e+00 96 2018 12 1.14133e+00 8.74620e-01 96 2019 1 6.80293e-02 8.80361e-02 160 2019 2 2.07038e+00 8.00451e-01 64 2019 3 1.84800e+00 1.08058e+00 208 2019 4 2.41292e+00 6.49351e-01 128 2019 5 3.49800e+00 1.22465e+00 240 2019 6 3.38024e+00 3.14263e+00 96 2019 7 9.43792e-01 1.05420e+00 126 2019 8 4.19263e+00 1.25005e+00 86 2019 9 1.10896e+00 9.78135e-01 288 2019 10 3.96917e+00 1.67347e+00 143 2019 11 3.80666e+00 2.54198e+00 192 2019 12 1.78286e+00 2.95655e-01 112 2020 1 2.59211e+00 1.12605e+00 112 2020 2 2.85019e+00 1.34452e+00 140 2020 3 2.45244e+00 2.60376e+00 105 2020 4 7.00351e-01 6.56280e-01 176 2020 5 9.93042e-01 9.88522e-01 154 2020 6 6.71691e+00 3.99396e+00 95 2020 7 3.24088e+00 2.02720e+00 80 2020 8 3.62443e+00 2.38826e+00 77 2020 9 1.67081e+00 1.30018e+00 102 2020 10 1.69977e+00 1.52510e+00 227 2020 11 1.93574e+00 1.59289e+00 195 2020 12 1.98883e+00 1.03827e+00 224 2021 1 1.70414e+00 8.63293e-01 128 2021 2 1.05639e+00 6.09866e-01 82 2021 3 3.57557e+00 1.50939e+00 134 2021 4 8.84568e+00 4.97470e+00 176 2021 5 1.12759e+01 3.84618e+00 128 2021 6 8.59042e+00 3.09581e+00 87 2021 7 4.12129e+00 3.93891e+00 144 2021 8 2.83275e+00 2.84367e+00 167 2021 9 4.93860e+00 2.09918e+00 112 2021 10 4.14010e+00 3.34616e+00 144 2021 11 3.13558e+00 1.95398e+00 240 2021 12 3.87555e+00 9.63676e-01 114 2022 1 1.57297e+00 5.18203e-01 160 2022 2 4.25315e+00 4.03406e+00 196 2022 3 4.62127e+00 1.50663e+00 208 2022 4 6.43811e+00 1.97968e+00 48 2022 5 1.60262e+01 5.00426e+00 159 2022 6 1.21774e+01 3.26372e+00 176 2022 7 1.12313e+01 3.80182e+00 115 2022 8 1.70419e+00 2.02204e+00 157 2022 9 5.40826e+00 2.02020e+00 223 2022 10 5.93631e+00 1.97033e+00 272 2022 11 3.91926e+00 2.41258e+00 169 2022 12 3.78783e+00 9.88807e-01 158 2023 1 4.69953e+00 2.21083e+00 192 2023 2 4.01836e+00 1.54111e+00 154 2023 3 2.52950e+00 1.43400e+00 112 2023 4 8.69660e+00 2.07776e+00 96 2023 5 1.31520e+01 4.07518e+00 112 2023 6 8.56905e+00 4.71191e+00 73 2023 7 2.27921e+00 1.03878e+00 160 2023 8 3.06487e+00 2.18091e+00 160 2023 9 1.08316e+00 6.82719e-01 136 2023 10 3.98834e+00 1.20344e+00 176 2023 11 2.25849e+00 6.50854e-01 176 2023 12 2.30821e+00 1.64166e+00 112 2024 1 2.15163e+00 6.04821e-01 111 2024 2 1.05408e+00 1.19541e+00 128 2024 3 2.06347e+00 6.57469e-01 80 2024 4 4.58191e+00 4.10739e-01 28