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 2.83976e+00 1.74997e+00 96 2002 8 3.84675e+00 8.97139e-01 48 2002 9 3.90345e+00 7.76521e-01 128 2002 10 5.40550e+00 2.53713e+00 145 2002 11 7.24830e+00 2.81190e+00 224 2002 12 4.78956e+00 2.28362e+00 189 2003 1 4.96522e+00 1.61414e+00 240 2003 2 3.87506e+00 2.45549e+00 118 2003 3 1.17555e+01 5.93354e+00 96 2003 4 1.19171e+01 1.20881e+01 196 2003 5 1.31541e+01 7.80261e+00 48 2003 6 4.24046e+00 1.11351e+00 41 2003 7 7.06472e+00 8.03767e+00 55 2003 8 1.50618e+01 1.45699e+01 48 2003 9 5.08814e+00 3.59105e+00 112 2003 10 5.08710e+00 2.88663e+00 208 2003 11 5.05096e+00 1.87831e+00 286 2003 12 4.35284e+00 1.45787e+00 176 2004 1 2.80268e+00 7.43725e-01 152 2004 2 5.60078e+00 2.56343e+00 96 2004 3 7.84835e+00 6.29714e+00 232 2004 4 2.67770e+00 6.93458e-01 155 2004 5 1.63008e+00 4.46689e-01 162 2004 6 1.65615e+00 3.21987e-01 93 2004 7 8.75585e+00 1.00272e+01 64 2004 8 2.97828e+00 1.26722e+00 112 2004 9 4.66870e+00 1.95484e+00 144 2004 10 5.41566e+00 2.97068e+00 115 2004 11 9.65826e+00 9.89331e+00 156 2004 12 8.25895e+00 3.60293e+00 128 2005 1 5.30687e+00 2.33134e+00 143 2005 2 4.31780e+00 1.47471e+00 96 2005 3 5.41520e+00 2.64279e+00 208 2005 4 9.01908e+00 3.18708e+00 84 2005 5 4.40730e+00 1.82712e+00 159 2005 6 4.06042e+00 2.10887e+00 122 2005 7 6.12424e+00 2.36916e+00 101 2005 8 6.84229e+00 2.70780e+00 56 2005 9 1.17791e+01 5.45252e+00 84 2005 10 5.24763e+00 2.60582e+00 231 2005 11 3.50076e+00 1.11344e+00 232 2005 12 4.16958e+00 1.56988e+00 176 2006 1 3.95283e+00 1.35894e+00 176 2006 2 3.88128e+00 2.27581e+00 192 2006 3 4.22051e+00 1.42243e+00 230 2006 4 2.31337e+00 7.54457e-01 189 2006 5 1.80916e+00 5.81776e-01 144 2006 6 2.00695e+00 4.84772e-01 84 2006 7 2.40483e+00 3.02985e-01 80 2006 8 2.44457e+00 5.27188e-01 137 2006 9 3.53100e+00 1.41158e+00 144 2006 10 2.94784e+00 8.27423e-01 224 2006 11 2.56270e+00 7.72345e-01 234 2006 12 2.63777e+00 9.62077e-01 112 2007 1 6.23297e+00 2.30156e+00 62 2007 2 5.87880e+00 2.25061e+00 217 2007 3 3.02175e+00 9.17775e-01 303 2007 4 2.11065e+00 5.60125e-01 201 2007 5 1.84463e+00 1.97591e-01 96 2007 6 1.89022e+00 3.27033e-01 64 2007 7 2.48555e+00 7.43692e-01 125 2007 8 3.26846e+00 6.04465e-01 84 2007 9 4.43486e+00 2.05247e+00 112 2007 10 2.62794e+00 1.46497e+00 144 2007 11 2.11146e+00 8.67968e-01 272 2007 12 2.48801e+00 7.02132e-01 130 2008 1 2.15466e+00 9.66074e-01 208 2008 2 3.51640e+00 2.01530e+00 272 2008 3 7.09001e+00 4.50100e+00 207 2008 4 6.27926e+00 4.94495e+00 190 2008 5 2.42634e+00 4.28525e-01 117 2008 6 3.00191e+00 1.78467e+00 128 2008 7 2.84722e+00 5.61599e-01 32 2008 8 2.41759e+00 1.05895e+00 48 2008 9 1.01581e+01 8.64728e+00 144 2008 10 6.22959e+00 3.62284e+00 272 2008 11 5.57321e+00 1.67444e+00 256 2008 12 5.19265e+00 2.26889e+00 240 2009 1 4.53699e+00 1.17097e+00 129 2009 2 2.99398e+00 6.22865e-01 232 2009 3 2.64566e+00 6.03316e-01 171 2009 4 9.39447e+00 6.90391e+00 144 2009 5 4.56178e+00 1.43063e+00 128 2009 6 2.52035e+00 6.70031e-01 53 2009 7 2.49051e+00 5.71465e-01 68 2009 8 3.32918e+00 1.80078e+00 93 2009 9 4.33915e+00 1.27820e+00 91 2009 10 5.07503e+00 2.30734e+00 204 2009 11 7.03992e+00 4.80044e+00 176 2009 12 9.09447e+00 3.53643e+00 64 2010 1 7.64053e+00 1.73139e+00 158 2010 2 7.55062e+00 3.33010e+00 190 2010 3 5.80115e+00 3.23280e+00 208 2010 4 9.10596e+00 5.48767e+00 208 2010 5 5.17489e+00 2.01407e+00 105 2010 6 3.36291e+00 1.06678e+00 128 2010 7 3.44610e+00 6.41168e-01 64 2010 8 2.24323e+00 9.38361e-01 78 2010 9 3.70744e+00 9.33263e-01 177 2010 10 2.71861e+00 1.37899e+00 304 2010 11 2.40631e+00 5.48440e-01 304 2010 12 2.63500e+00 8.37959e-01 240 2011 1 2.62389e+00 6.33148e-01 192 2011 2 3.79676e+00 7.50573e-01 159 2011 3 2.55180e+00 7.31392e-01 192 2011 4 3.09135e+00 1.37342e+00 192 2011 5 2.29751e+00 6.49121e-01 178 2011 6 3.53299e+00 1.28926e+00 128 2011 7 2.99905e+00 2.49951e-01 48 2011 8 3.36222e+00 9.57571e-01 143 2011 9 2.40048e+00 1.12831e+00 176 2011 10 2.23093e+00 8.48690e-01 269 2011 11 2.12961e+00 7.23375e-01 224 2011 12 1.92536e+00 6.65800e-01 270 2012 1 2.15407e+00 5.45332e-01 272 2012 2 1.61092e+00 4.58460e-01 48 2012 3 1.68473e+00 5.51282e-01 208 2012 4 1.64420e+00 3.69792e-01 176 2012 5 1.45497e+00 2.77573e-01 144 2012 6 5.15173e+00 5.38369e+00 71 2012 7 5.72952e+00 5.58772e+00 128 2012 8 1.03564e+01 4.04619e+00 48 2012 9 4.79186e+00 2.70410e+00 72 2012 10 8.59469e+00 4.74421e+00 208 2012 11 5.19179e+00 4.49152e+00 232 2012 12 3.79586e+00 1.72699e+00 112 2013 1 2.63100e+00 6.07139e-01 124 2013 2 2.33189e+00 6.36109e-01 172 2013 3 6.25670e+00 2.00694e+00 192 2013 4 7.71084e+00 3.36949e+00 80 2013 5 3.50248e+00 5.01691e-01 68 2013 6 3.36477e+00 9.10637e-01 73 2013 7 4.68678e+00 2.83286e+00 32 2013 8 7.27102e+00 4.41701e+00 46 2013 9 7.65892e+00 5.19135e+00 176 2013 10 9.43153e+00 1.01187e+01 169 2013 11 4.98326e+00 2.00428e+00 80 2013 12 4.89498e+00 1.58697e+00 173 2014 1 8.10039e+00 3.34593e+00 128 2014 2 7.39217e+00 3.30728e+00 144 2014 3 1.34613e+01 7.72369e+00 156 2014 4 9.67082e+00 4.00959e+00 128 2014 5 7.23618e+00 5.96234e+00 103 2014 6 2.79097e+00 1.89821e+00 142 2014 7 3.07551e+00 4.79641e-01 80 2014 8 2.55828e+00 1.27185e+00 133 2014 9 3.15261e+00 2.04705e+00 120 2014 10 3.60386e+00 1.32893e+00 304 2014 11 2.17074e+00 6.43619e-01 240 2014 12 3.83225e+00 1.40196e+00 205 2015 1 8.89995e+00 2.90532e+00 168 2015 2 7.29367e+00 2.88289e+00 174 2015 3 5.11721e+00 3.41056e+00 120 2015 4 3.07246e+00 9.87353e-01 48 2015 5 1.03349e+01 1.29515e+01 162 2015 6 3.51468e+00 7.38416e-01 86 2015 7 2.90644e+00 6.78198e-01 54 2015 8 3.24334e+00 1.44337e+00 82 2015 9 3.83773e+00 2.32002e+00 128 2015 10 3.95805e+00 2.84237e+00 217 2015 11 7.21642e+00 4.53713e+00 194 2015 12 9.50025e+00 6.49679e+00 112 2016 1 7.39511e+00 1.38033e+00 120 2016 2 6.23235e+00 1.87058e+00 288 2016 3 4.73984e+00 1.31286e+00 162 2016 4 7.71697e+00 2.15045e+00 80 2016 5 9.72101e+00 1.12462e+01 127 2016 6 2.63916e+00 7.89483e-01 128 2016 7 2.58053e+00 8.00848e-01 176 2016 8 4.53563e+00 1.51633e+00 128 2016 9 4.24641e+00 3.13181e+00 184 2016 10 6.15884e+00 9.99807e+00 281 2016 11 2.68139e+00 7.50432e-01 206 2016 12 2.47894e+00 5.80329e-01 208 2017 1 3.76892e+00 2.49117e+00 172 2017 2 4.33038e+00 1.32467e+00 229 2017 3 3.39658e+00 1.12340e+00 245 2017 4 2.42657e+00 8.23489e-01 144 2017 5 2.78652e+00 1.20820e+00 128 2017 6 2.82258e+00 3.00319e-01 51 2017 7 4.82517e+00 5.02688e+00 84 2017 8 3.83010e+00 2.14424e+00 72 2017 9 1.08768e+01 1.21284e+01 147 2017 10 4.40542e+00 1.13550e+00 240 2017 11 3.33978e+00 8.11611e-01 305 2017 12 3.91727e+00 3.00100e+00 124 2018 1 2.15518e+00 7.33506e-01 261 2018 2 2.35097e+00 5.94091e-01 79 2018 3 3.30653e+00 1.32570e+00 230 2018 4 2.89621e+00 1.10271e+00 144 2018 5 2.65963e+00 6.38679e-01 86 2018 6 3.80173e+00 2.55622e+00 105 2018 7 3.81389e+00 1.77238e+00 95 2018 8 4.07547e+00 1.69195e+00 51 2018 9 5.73827e+00 4.97331e+00 213 2018 10 8.02400e+00 7.01510e+00 283 2018 11 5.22628e+00 1.64996e+00 112 2018 12 9.52401e+00 5.87468e+00 128 2019 1 8.93935e+00 4.42128e+00 256 2019 2 1.13427e+01 7.32296e+00 80 2019 3 7.62189e+00 3.91339e+00 256 2019 4 6.13161e+00 2.36824e+00 97 2019 5 4.12679e+00 1.30847e+00 192 2019 6 2.51379e+00 1.21274e+00 82 2019 7 3.10744e+00 5.86014e-01 80 2019 8 2.97569e+00 1.54653e+00 131 2019 9 4.23572e+00 1.78365e+00 240 2019 10 4.82844e+00 1.84876e+00 203 2019 11 2.84745e+00 1.04596e+00 176 2019 12 2.93939e+00 6.24697e-01 128 2020 1 3.21304e+00 9.00771e-01 160 2020 2 4.65904e+00 4.41377e+00 132 2020 3 8.50282e+00 3.89470e+00 163 2020 4 3.48984e+00 1.37374e+00 128 2020 5 3.92444e+00 1.42906e+00 128 2020 6 8.92634e+00 6.85380e+00 96 2020 7 1.76655e+00 1.66420e-01 16 2020 8 3.71004e+00 1.08355e+00 80 2020 9 1.44507e+01 9.67502e+00 91 2020 10 1.09587e+01 6.93176e+00 166 2020 11 1.15261e+01 4.43425e+00 229 2020 12 5.34152e+00 1.79778e+00 242 2021 1 8.54802e+00 5.32269e+00 89 2021 2 8.75184e+00 2.48537e+00 96 2021 3 1.47100e+01 7.95645e+00 133 2021 4 1.14388e+01 8.53398e+00 131 2021 5 4.96828e+00 1.77292e+00 192 2021 6 2.16582e+00 6.04875e-01 48 2021 7 4.86694e+00 3.29620e+00 94 2021 8 7.61141e+00 3.74508e+00 120 2021 9 1.48309e+01 2.04836e+01 62 2021 10 1.05443e+01 1.50010e+01 82 2021 11 8.57177e+00 3.20388e+00 240 2021 12 7.50104e+00 3.52797e+00 126 2022 1 6.95314e+00 4.21988e+00 240 2022 2 4.25204e+00 1.65970e+00 161 2022 3 4.14741e+00 1.47921e+00 192 2022 4 2.48873e+01 2.26285e+01 75 2022 5 3.44958e+00 8.41781e-01 92 2022 6 3.87580e+00 2.19079e+00 114 2022 7 3.76846e+00 1.68294e+00 96 2022 8 3.09354e+00 1.27857e+00 96 2022 9 3.11919e+00 1.77976e+00 171 2022 10 4.17416e+00 2.63183e+00 289 2022 11 3.13202e+00 1.18005e+00 176 2022 12 3.06895e+00 7.80189e-01 206 2023 1 2.82111e+00 6.23854e-01 248 2023 2 3.98307e+00 1.33728e+00 179 2023 3 3.67360e+00 1.08929e+00 176 2023 4 2.67951e+00 8.17820e-01 96 2023 5 2.03995e+00 7.88120e-01 112 2023 6 1.94620e+00 9.58739e-01 114 2023 7 3.37876e+00 1.04132e+00 64 2023 8 3.11239e+00 1.11985e+00 140 2023 9 4.15114e+00 2.83313e+00 144 2023 10 4.48599e+00 1.40315e+00 224 2023 11 4.40880e+00 1.39123e+00 192 2023 12 1.04007e+01 8.39950e+00 80 2024 1 8.98201e+00 3.11127e+00 99 2024 2 7.84999e+00 5.98271e+00 158 2024 3 5.89147e+00 2.04952e+00 112 2024 4 nan nan 0