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 2.11326e+01 3.17166e+00 96 2002 8 1.68167e+01 5.19125e+00 96 2002 9 5.02829e+00 5.36183e+00 96 2002 10 2.67075e+00 2.31863e+00 190 2002 11 2.74029e+00 2.56711e+00 208 2002 12 3.60554e+00 2.69989e+00 181 2003 1 1.45997e+00 1.82518e+00 240 2003 2 6.36957e+00 4.18611e+00 160 2003 3 1.48653e+00 1.60903e+00 87 2003 4 6.37081e+00 4.70717e+00 192 2003 5 1.28455e+01 3.78261e+00 70 2003 6 5.49622e+00 3.35478e+00 73 2003 7 6.87938e+00 5.30168e+00 112 2003 8 9.55515e+00 4.28648e+00 112 2003 9 7.19023e+00 6.67303e+00 112 2003 10 5.40546e+00 4.25760e+00 201 2003 11 1.09787e+01 3.55362e+00 256 2003 12 8.04509e+00 4.19414e+00 240 2004 1 1.05847e+01 2.44528e+00 134 2004 2 8.34957e+00 2.15360e+00 64 2004 3 1.09251e+01 4.58784e+00 240 2004 4 1.71250e+01 5.03729e+00 186 2004 5 1.95475e+01 3.40794e+00 194 2004 6 1.71456e+01 2.40457e+00 48 2004 7 1.97407e+01 3.04069e+00 64 2004 8 1.76550e+01 2.68927e+00 129 2004 9 4.54571e+00 6.42159e+00 96 2004 10 7.03531e+00 6.27796e+00 128 2004 11 2.70741e+00 2.08069e+00 161 2004 12 1.63407e+00 1.18307e+00 128 2005 1 4.44807e+00 2.38798e+00 176 2005 2 6.36657e+00 4.01252e+00 124 2005 3 7.89711e+00 3.53135e+00 172 2005 4 1.65222e+00 1.81079e+00 112 2005 5 7.08494e+00 4.26355e+00 205 2005 6 1.11764e+01 2.82433e+00 80 2005 7 9.49144e+00 8.35190e+00 84 2005 8 8.65064e+00 6.19909e+00 101 2005 9 4.33451e+00 3.99903e+00 176 2005 10 2.12836e+00 2.32144e+00 304 2005 11 4.28177e+00 2.31923e+00 228 2005 12 8.69007e+00 3.22500e+00 160 2006 1 4.41716e+00 2.73259e+00 176 2006 2 5.31187e+00 3.55674e+00 159 2006 3 1.22004e+01 4.72885e+00 224 2006 4 2.23336e+01 4.49089e+00 157 2006 5 2.16203e+01 4.69932e+00 176 2006 6 1.84600e+01 4.46539e+00 140 2006 7 2.40147e+01 4.62528e+00 112 2006 8 2.44873e+01 3.14166e+00 160 2006 9 1.51721e+01 5.56256e+00 155 2006 10 1.06161e+01 6.00218e+00 208 2006 11 5.13761e+00 2.26219e+00 264 2006 12 8.79614e+00 4.66258e+00 208 2007 1 5.60277e+00 1.92013e+00 112 2007 2 1.04008e+01 3.83610e+00 144 2007 3 1.67082e+01 5.35135e+00 255 2007 4 1.28252e+01 3.48891e+00 128 2007 5 1.99352e+01 2.16435e+00 119 2007 6 1.77838e+01 6.49892e+00 128 2007 7 2.19654e+01 3.08832e+00 80 2007 8 1.92892e+01 4.58635e+00 88 2007 9 6.25493e+00 6.08168e+00 144 2007 10 2.83260e+00 2.35620e+00 176 2007 11 9.09785e+00 3.85029e+00 230 2007 12 1.06236e+01 3.89319e+00 64 2008 1 4.27796e+00 2.66008e+00 144 2008 2 9.42721e+00 4.41016e+00 240 2008 3 3.43692e+00 3.83513e+00 176 2008 4 9.11494e+00 2.74963e+00 163 2008 5 8.21017e+00 3.00656e+00 106 2008 6 1.16957e+01 4.36149e+00 192 2008 7 1.05134e+01 2.82879e+00 49 2008 8 1.23784e+01 2.01060e+00 84 2008 9 3.85396e+00 2.68486e+00 137 2008 10 5.29083e+00 2.22805e+00 182 2008 11 1.01941e+01 4.01669e+00 271 2008 12 9.02883e+00 4.63748e+00 128 2009 1 7.48183e+00 3.45110e+00 174 2009 2 2.08017e+00 2.21134e+00 184 2009 3 1.32700e+01 7.04608e+00 176 2009 4 5.12474e+00 3.03459e+00 160 2009 5 7.47366e+00 4.30436e+00 112 2009 6 1.23504e+01 4.36475e+00 128 2009 7 2.09752e+01 2.60924e+00 112 2009 8 2.13777e+01 6.13383e+00 127 2009 9 1.61540e+01 4.22281e+00 160 2009 10 9.76549e+00 4.65629e+00 188 2009 11 5.54447e+00 2.63671e+00 206 2009 12 4.86150e-01 4.42597e-01 64 2010 1 4.33075e+00 2.52344e+00 147 2010 2 2.64595e+00 3.90014e+00 160 2010 3 1.64844e+00 2.07208e+00 164 2010 4 2.65643e+00 3.31284e+00 192 2010 5 1.02336e+01 4.37205e+00 127 2010 6 1.29037e+01 5.61250e+00 116 2010 7 1.46296e+01 2.58638e+00 33 2010 8 1.57805e+01 2.27025e-01 16 2010 9 1.16012e+01 2.34292e+00 208 2010 10 1.33412e+01 3.65278e+00 336 2010 11 7.89567e+00 3.92124e+00 144 2010 12 3.65863e+00 2.09236e+00 216 2011 1 1.82947e+00 1.63522e+00 176 2011 2 5.13244e+00 3.34894e+00 192 2011 3 1.01387e+01 3.92215e+00 192 2011 4 1.44910e+01 2.76798e+00 160 2011 5 1.58208e+01 6.87210e+00 160 2011 6 1.11812e+01 3.78570e+00 128 2011 7 1.41710e+01 2.46636e+00 112 2011 8 1.16558e+01 4.61641e+00 176 2011 9 7.64714e+00 4.43742e+00 168 2011 10 7.61962e+00 2.13461e+00 290 2011 11 9.06374e+00 2.67240e+00 220 2011 12 7.40851e+00 2.32551e+00 147 2012 1 8.45450e+00 3.60803e+00 208 2012 2 7.51681e+00 2.87898e+00 55 2012 3 1.23196e+01 4.51717e+00 208 2012 4 1.62193e+01 3.16564e+00 176 2012 5 2.14528e+01 2.54055e+00 144 2012 6 1.57250e+01 1.09280e+01 88 2012 7 2.44123e+01 3.40639e+00 107 2012 8 1.72022e+01 8.48863e-01 64 2012 9 3.85365e+00 3.47468e+00 156 2012 10 7.50344e+00 4.89444e+00 288 2012 11 6.50495e+00 4.30200e+00 315 2012 12 7.79539e+00 4.34241e+00 112 2013 1 1.19512e+01 3.81560e+00 112 2013 2 1.27572e+01 3.96016e+00 110 2013 3 2.91684e+00 2.47931e+00 224 2013 4 5.21735e+00 2.82001e+00 96 2013 5 1.32311e+01 5.78559e+00 160 2013 6 2.00359e+01 3.59571e+00 62 2013 7 1.12179e+01 6.59813e+00 80 2013 8 9.73058e+00 3.34824e+00 145 2013 9 1.20149e+01 2.84750e+00 192 2013 10 7.08456e+00 4.40394e+00 256 2013 11 9.37568e+00 3.44266e+00 159 2013 12 7.78740e+00 2.65317e+00 109 2014 1 5.75444e+00 2.08292e+00 128 2014 2 7.16303e+00 3.64237e+00 144 2014 3 3.17979e+00 2.03295e+00 172 2014 4 5.84185e+00 3.88523e+00 128 2014 5 2.68669e+00 2.51746e+00 128 2014 6 8.73520e+00 4.82594e+00 151 2014 7 1.13292e+01 3.32162e+00 122 2014 8 2.13575e+01 3.05093e+00 167 2014 9 2.10845e+01 5.52028e+00 160 2014 10 9.82311e+00 3.20285e+00 336 2014 11 6.00325e+00 3.54125e+00 208 2014 12 8.51543e+00 2.10684e+00 208 2015 1 4.84157e+00 2.80664e+00 167 2015 2 6.65979e+00 3.08819e+00 167 2015 3 8.56467e+00 3.59547e+00 158 2015 4 1.12854e+01 3.35190e+00 64 2015 5 1.31236e+01 4.15526e+00 176 2015 6 1.28186e+01 3.46887e+00 144 2015 7 1.33902e+01 5.19062e+00 112 2015 8 2.00156e+01 3.26726e+00 144 2015 9 8.60288e+00 6.04080e+00 130 2015 10 8.02972e-01 1.26016e+00 211 2015 11 4.25629e+00 2.25728e+00 176 2015 12 3.72367e+00 3.37279e+00 128 2016 1 8.59461e-01 1.20602e+00 176 2016 2 3.22244e+00 3.70222e+00 243 2016 3 6.58842e+00 4.30548e+00 164 2016 4 1.12498e+00 8.71760e-01 108 2016 5 8.46380e+00 5.19475e+00 137 2016 6 1.19044e+01 6.09252e+00 144 2016 7 5.55825e+00 3.09945e+00 142 2016 8 1.40682e+01 2.97932e+00 119 2016 9 1.35804e+01 4.85840e+00 177 2016 10 1.26925e+01 3.55071e+00 320 2016 11 1.39472e+01 2.24056e+00 256 2016 12 1.24554e+01 2.88932e+00 172 2017 1 6.55351e+00 4.56610e+00 160 2017 2 4.24886e+00 2.33580e+00 249 2017 3 8.87359e+00 4.02046e+00 208 2017 4 1.00438e+01 3.40026e+00 148 2017 5 9.60303e+00 3.63229e+00 132 2017 6 1.24293e+01 3.39005e+00 80 2017 7 1.24189e+01 4.92807e+00 128 2017 8 7.92350e+00 4.51347e+00 68 2017 9 9.98294e+00 4.21460e+00 160 2017 10 4.35782e+00 2.99237e+00 240 2017 11 7.91279e+00 3.68123e+00 257 2017 12 5.28986e+00 2.84019e+00 126 2018 1 9.38484e+00 3.34329e+00 192 2018 2 2.08845e+01 3.22524e+00 160 2018 3 1.43617e+01 5.13519e+00 265 2018 4 1.38205e+01 3.78353e+00 192 2018 5 1.46272e+01 6.30225e+00 84 2018 6 1.11014e+01 2.44456e+00 80 2018 7 1.51902e+01 1.13922e+00 80 2018 8 1.73343e+01 6.25638e+00 89 2018 9 1.43518e+01 6.01003e+00 211 2018 10 5.75081e+00 6.84297e+00 260 2018 11 8.21307e-01 1.27682e+00 128 2018 12 1.28528e+00 1.78781e+00 103 2019 1 6.82532e-01 6.59537e-01 213 2019 2 1.21262e+00 1.15863e+00 58 2019 3 3.95047e+00 3.11483e+00 161 2019 4 5.28921e+00 4.05101e+00 116 2019 5 1.22882e+01 5.06607e+00 224 2019 6 1.68324e+01 1.93185e+00 64 2019 7 7.83688e+00 2.16942e+00 105 2019 8 1.50037e+01 4.41406e+00 112 2019 9 8.91644e+00 2.51079e+00 273 2019 10 9.34071e+00 3.11547e+00 160 2019 11 3.73991e+00 1.68234e+00 180 2019 12 3.27915e+00 5.23584e-01 124 2020 1 4.76125e+00 1.52724e+00 96 2020 2 3.92932e+00 2.51868e+00 144 2020 3 1.23161e+01 5.15423e+00 192 2020 4 5.34111e+00 3.01758e+00 158 2020 5 5.77490e+00 5.58939e+00 128 2020 6 9.52779e+00 5.91648e+00 80 2020 7 1.07520e+01 1.73471e+00 48 2020 8 1.71079e+01 3.13321e+00 80 2020 9 2.74028e+00 2.92170e+00 124 2020 10 5.71512e-01 9.59251e-01 194 2020 11 1.48707e+00 1.47786e+00 208 2020 12 4.54571e+00 3.65293e+00 252 2021 1 2.22815e+00 2.18546e+00 128 2021 2 5.58380e+00 3.16275e+00 103 2021 3 4.64834e+00 3.37080e+00 121 2021 4 8.64499e+00 3.96852e+00 176 2021 5 7.75681e+00 2.48146e+00 123 2021 6 1.26018e+01 2.72809e+00 80 2021 7 6.04089e+00 3.87727e+00 140 2021 8 4.48664e+00 5.40712e+00 112 2021 9 4.45821e+00 4.36319e+00 148 2021 10 1.70595e+00 4.04981e+00 128 2021 11 4.04730e+00 2.31042e+00 240 2021 12 3.69651e+00 2.15984e+00 142 2022 1 5.04955e+00 2.96028e+00 176 2022 2 1.10366e+01 5.04896e+00 176 2022 3 1.33054e+01 3.90066e+00 208 2022 4 1.42440e+01 4.00137e+00 48 2022 5 1.49628e+01 1.04609e+01 128 2022 6 2.82889e+01 5.36248e+00 208 2022 7 1.56768e+01 3.31830e+00 128 2022 8 5.91619e+00 1.85397e+00 128 2022 9 9.90218e+00 6.49480e+00 154 2022 10 8.35620e+00 3.26863e+00 308 2022 11 7.60269e+00 2.04352e+00 148 2022 12 1.14226e+01 4.12389e+00 145 2023 1 1.35737e+01 4.07890e+00 209 2023 2 1.34209e+01 3.91905e+00 164 2023 3 1.48446e+01 4.07718e+00 112 2023 4 1.73014e+01 5.88408e+00 121 2023 5 1.99740e+01 4.13016e+00 96 2023 6 2.17854e+01 2.47636e+00 80 2023 7 1.41807e+01 3.71457e+00 96 2023 8 4.01208e+00 2.71102e+00 129 2023 9 7.45011e+00 4.65489e+00 112 2023 10 6.59090e+00 3.50595e+00 217 2023 11 2.96952e+00 2.06879e+00 183 2023 12 3.47733e+00 1.93022e+00 90 2024 1 2.68729e+00 2.93375e+00 112 2024 2 3.45582e+00 1.93731e+00 151 2024 3 3.96520e+00 3.98573e+00 82 2024 4 nan nan 0