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 6.16758e+01 6.69019e-01 64 2002 8 5.78586e+01 8.61545e-01 64 2002 9 5.02680e+01 2.71008e+00 87 2002 10 4.39329e+01 2.13003e+00 154 2002 11 3.43265e+01 2.26503e+00 172 2002 12 2.99937e+01 4.36457e-01 160 2003 1 3.19686e+01 1.63282e+00 197 2003 2 3.95972e+01 2.39227e+00 192 2003 3 5.17384e+01 1.72789e+00 72 2003 4 5.75828e+01 1.96052e+00 192 2003 5 6.19299e+01 1.01027e+00 80 2003 6 6.28983e+01 9.19329e-02 84 2003 7 6.12872e+01 7.33702e-01 79 2003 8 5.69282e+01 6.47445e-01 64 2003 9 5.10250e+01 2.02215e+00 144 2003 10 4.26280e+01 2.69079e+00 209 2003 11 3.45751e+01 2.10037e+00 256 2003 12 2.98790e+01 3.81774e-01 174 2004 1 3.24400e+01 1.37203e+00 160 2004 2 4.23553e+01 1.38063e+00 80 2004 3 4.94947e+01 2.41480e+00 256 2004 4 5.74771e+01 1.90486e+00 204 2004 5 6.20110e+01 8.87034e-01 240 2004 6 6.29010e+01 7.28945e-02 48 2004 7 6.20779e+01 2.66811e-01 74 2004 8 5.77041e+01 1.75328e+00 154 2004 9 5.21383e+01 2.24316e+00 76 2004 10 4.43159e+01 1.79087e+00 80 2004 11 3.46166e+01 2.07873e+00 176 2004 12 2.97936e+01 1.87321e-01 180 2005 1 3.23224e+01 1.46226e+00 168 2005 2 3.91543e+01 1.47100e+00 144 2005 3 4.84327e+01 2.49700e+00 192 2005 4 5.78518e+01 1.20746e+00 160 2005 5 6.16824e+01 6.87040e-01 160 2005 6 6.30006e+01 1.60556e-01 92 2005 7 6.15932e+01 5.90347e-01 86 2005 8 5.86307e+01 7.99618e-01 80 2005 9 5.10810e+01 2.64861e+00 112 2005 10 4.19322e+01 2.40712e+00 219 2005 11 3.45586e+01 1.90491e+00 224 2005 12 2.99919e+01 4.51627e-01 160 2006 1 3.27306e+01 1.86212e+00 208 2006 2 4.10968e+01 2.44117e+00 194 2006 3 4.92675e+01 3.07730e+00 255 2006 4 5.73348e+01 1.90492e+00 176 2006 5 6.18964e+01 8.29357e-01 208 2006 6 6.30210e+01 1.29203e-01 128 2006 7 6.16014e+01 7.26154e-01 128 2006 8 5.81636e+01 1.49715e+00 151 2006 9 5.07192e+01 2.93482e+00 160 2006 10 4.33727e+01 2.86555e+00 240 2006 11 3.36613e+01 1.99057e+00 192 2006 12 3.02241e+01 5.32529e-01 112 2007 1 3.29326e+01 2.04539e+00 96 2007 2 4.02486e+01 2.22176e+00 170 2007 3 4.95954e+01 2.59948e+00 304 2007 4 5.80276e+01 1.94214e+00 176 2007 5 6.18826e+01 8.87708e-01 144 2007 6 6.29425e+01 2.12887e-01 121 2007 7 6.16806e+01 5.83933e-01 112 2007 8 5.74711e+01 1.32942e+00 128 2007 9 4.91324e+01 2.24328e+00 72 2007 10 4.25952e+01 2.22827e+00 105 2007 11 3.49699e+01 1.94848e+00 256 2007 12 2.99947e+01 2.96005e-01 128 2008 1 3.20792e+01 2.05913e+00 202 2008 2 3.99066e+01 2.87118e+00 220 2008 3 5.06774e+01 2.57129e+00 176 2008 4 5.85238e+01 1.17160e+00 176 2008 5 6.18997e+01 9.13358e-01 176 2008 6 6.29670e+01 1.59315e-01 160 2008 7 6.16133e+01 4.27939e-01 88 2008 8 5.84180e+01 1.56314e+00 80 2008 9 5.12914e+01 2.01365e+00 144 2008 10 4.20494e+01 2.42346e+00 284 2008 11 3.45130e+01 1.85572e+00 250 2008 12 2.98964e+01 4.63445e-01 176 2009 1 3.24517e+01 1.64157e+00 216 2009 2 4.03228e+01 2.73554e+00 222 2009 3 4.83709e+01 2.14775e+00 222 2009 4 5.78913e+01 2.04041e+00 95 2009 5 6.16132e+01 9.70940e-01 121 2009 6 6.30181e+01 1.10693e-01 96 2009 7 6.12924e+01 6.01219e-01 64 2009 8 5.83231e+01 1.29844e+00 104 2009 9 5.01333e+01 2.50160e+00 132 2009 10 4.23452e+01 2.50141e+00 192 2009 11 3.37626e+01 2.04488e+00 228 2009 12 2.98774e+01 2.34654e-01 80 2010 1 3.19018e+01 1.73265e+00 215 2010 2 4.07205e+01 2.34216e+00 165 2010 3 4.91811e+01 2.91688e+00 183 2010 4 5.72109e+01 1.77010e+00 160 2010 5 6.21446e+01 5.77384e-01 128 2010 6 6.28771e+01 8.82406e-02 129 2010 7 6.13523e+01 8.82156e-01 80 2010 8 5.78082e+01 9.97755e-01 96 2010 9 5.11354e+01 2.15577e+00 208 2010 10 4.33334e+01 2.46331e+00 309 2010 11 3.45080e+01 1.86237e+00 288 2010 12 3.01507e+01 4.92417e-01 255 2011 1 3.27024e+01 1.74173e+00 256 2011 2 4.13075e+01 1.76619e+00 208 2011 3 4.92500e+01 2.06888e+00 175 2011 4 5.73523e+01 1.92380e+00 208 2011 5 6.16815e+01 7.90711e-01 242 2011 6 6.30615e+01 1.85178e-01 112 2011 7 6.14015e+01 7.59329e-01 96 2011 8 5.76650e+01 1.47906e+00 192 2011 9 5.09668e+01 2.10605e+00 117 2011 10 4.28688e+01 2.75229e+00 252 2011 11 3.46005e+01 1.99390e+00 256 2011 12 3.00036e+01 5.00889e-01 208 2012 1 3.17996e+01 1.83208e+00 167 2012 2 4.07383e+01 1.22958e+00 32 2012 3 4.92945e+01 2.39228e+00 240 2012 4 5.76914e+01 1.56488e+00 184 2012 5 6.18805e+01 7.96099e-01 192 2012 6 6.30892e+01 1.91744e-01 128 2012 7 6.18297e+01 4.70636e-01 56 2012 8 5.78388e+01 1.35678e+00 138 2012 9 4.91448e+01 1.90995e+00 80 2012 10 4.18013e+01 2.35318e+00 226 2012 11 3.47683e+01 2.06937e+00 256 2012 12 3.02297e+01 4.24483e-01 112 2013 1 3.34591e+01 1.46854e+00 160 2013 2 4.00816e+01 2.96403e+00 128 2013 3 5.02064e+01 2.89781e+00 196 2013 4 5.66607e+01 1.51306e+00 112 2013 5 6.20068e+01 6.86318e-01 172 2013 6 6.29855e+01 1.27170e-01 128 2013 7 6.13347e+01 7.05798e-01 32 2013 8 5.75002e+01 1.58430e+00 100 2013 9 5.14757e+01 2.22806e+00 142 2013 10 4.21665e+01 2.46430e+00 192 2013 11 3.39029e+01 2.40834e+00 96 2013 12 2.98229e+01 3.43127e-01 213 2014 1 3.21735e+01 1.21141e+00 112 2014 2 4.07196e+01 1.79640e+00 176 2014 3 4.99907e+01 2.50820e+00 160 2014 4 5.76352e+01 1.93764e+00 141 2014 5 6.17887e+01 7.13500e-01 172 2014 6 6.29058e+01 1.06253e-01 142 2014 7 6.12649e+01 7.71806e-01 112 2014 8 5.74961e+01 1.40274e+00 156 2014 9 5.16102e+01 2.01460e+00 96 2014 10 4.22989e+01 2.40719e+00 237 2014 11 3.43149e+01 2.21312e+00 240 2014 12 3.01218e+01 4.38357e-01 209 2015 1 3.33992e+01 1.66689e+00 158 2015 2 3.89777e+01 1.73239e+00 208 2015 3 5.00924e+01 2.61365e+00 128 2015 4 5.66303e+01 2.54142e+00 78 2015 5 6.16424e+01 9.33066e-01 194 2015 6 6.28844e+01 1.41239e-01 120 2015 7 6.20163e+01 4.49027e-01 64 2015 8 5.69833e+01 1.15058e+00 96 2015 9 5.08866e+01 1.53888e+00 67 2015 10 4.26215e+01 2.02260e+00 176 2015 11 3.36920e+01 1.99868e+00 192 2015 12 3.01597e+01 4.37601e-01 144 2016 1 3.26985e+01 1.55291e+00 114 2016 2 4.05812e+01 2.53544e+00 256 2016 3 4.90147e+01 2.54178e+00 199 2016 4 5.64204e+01 1.54350e+00 109 2016 5 6.17112e+01 7.85635e-01 192 2016 6 6.30043e+01 1.23453e-01 160 2016 7 6.17702e+01 6.39357e-01 144 2016 8 5.75379e+01 8.78581e-01 101 2016 9 4.99926e+01 2.39184e+00 160 2016 10 4.24911e+01 2.68919e+00 270 2016 11 3.42748e+01 1.81015e+00 240 2016 12 2.98185e+01 4.08721e-01 192 2017 1 3.24813e+01 1.69960e+00 187 2017 2 4.04674e+01 2.45429e+00 301 2017 3 5.05080e+01 2.63826e+00 192 2017 4 5.69495e+01 1.47272e+00 160 2017 5 6.18379e+01 7.46295e-01 150 2017 6 6.28221e+01 2.24573e-01 48 2017 7 6.16084e+01 7.91364e-01 144 2017 8 5.77878e+01 1.45179e+00 88 2017 9 5.07263e+01 2.42158e+00 160 2017 10 4.12337e+01 2.84879e+00 189 2017 11 3.42025e+01 2.12423e+00 283 2017 12 2.99490e+01 2.37914e-01 168 2018 1 3.24913e+01 1.74418e+00 223 2018 2 4.04804e+01 2.90761e+00 92 2018 3 4.89351e+01 2.74755e+00 256 2018 4 5.77140e+01 1.74792e+00 202 2018 5 6.15569e+01 7.38733e-01 192 2018 6 6.28771e+01 1.24452e-01 150 2018 7 6.16987e+01 5.39124e-01 84 2018 8 5.79144e+01 1.35103e+00 112 2018 9 5.10286e+01 1.93203e+00 168 2018 10 4.18450e+01 2.66206e+00 206 2018 11 3.46543e+01 1.52545e+00 80 2018 12 3.01393e+01 3.96511e-01 123 2019 1 3.23970e+01 1.74685e+00 204 2019 2 3.83533e+01 6.06447e-01 32 2019 3 5.03476e+01 2.54676e+00 196 2019 4 5.87636e+01 8.31028e-01 97 2019 5 6.17609e+01 7.92712e-01 208 2019 6 6.30588e+01 1.03788e-01 91 2019 7 6.19182e+01 7.58486e-01 144 2019 8 5.79824e+01 1.76680e+00 129 2019 9 5.10954e+01 2.44510e+00 256 2019 10 4.42574e+01 2.30396e+00 141 2019 11 3.38891e+01 2.01704e+00 160 2019 12 3.00690e+01 3.44542e-01 77 2020 1 3.28013e+01 1.52278e+00 112 2020 2 4.02308e+01 3.23249e+00 134 2020 3 5.00047e+01 2.22469e+00 179 2020 4 5.79102e+01 2.26262e+00 143 2020 5 6.15976e+01 7.67834e-01 128 2020 6 6.31080e+01 1.21978e-01 96 2020 7 6.13571e+01 8.92546e-01 81 2020 8 5.96317e+01 6.24743e-01 80 2020 9 5.10024e+01 2.55701e+00 119 2020 10 4.26605e+01 2.58496e+00 160 2020 11 3.45908e+01 1.80581e+00 275 2020 12 2.99858e+01 4.52665e-01 256 2021 1 3.25041e+01 1.73892e+00 128 2021 2 4.10468e+01 3.10656e+00 144 2021 3 4.92487e+01 2.29163e+00 160 2021 4 5.71172e+01 2.00146e+00 173 2021 5 6.20904e+01 7.27667e-01 160 2021 6 6.29413e+01 6.59747e-02 48 2021 7 6.10977e+01 5.98178e-01 124 2021 8 5.81611e+01 6.60573e-01 96 2021 9 5.05501e+01 2.47454e+00 57 2021 10 4.19244e+01 2.01846e+00 159 2021 11 3.44979e+01 1.98549e+00 208 2021 12 2.99968e+01 4.80502e-01 152 2022 1 3.23717e+01 1.94360e+00 183 2022 2 4.11409e+01 1.81174e+00 128 2022 3 4.95317e+01 3.03325e+00 258 2022 4 5.87829e+01 4.60932e-01 51 2022 5 6.15970e+01 1.06116e+00 129 2022 6 6.29783e+01 1.67351e-01 192 2022 7 6.13197e+01 6.50643e-01 96 2022 8 5.75915e+01 1.66016e+00 76 2022 9 5.03329e+01 1.92242e+00 144 2022 10 4.31559e+01 2.40387e+00 272 2022 11 3.47732e+01 2.33282e+00 160 2022 12 2.99889e+01 5.52497e-01 128 2023 1 3.22399e+01 1.48702e+00 240 2023 2 3.99401e+01 2.98657e+00 174 2023 3 4.87094e+01 2.18419e+00 151 2023 4 5.82689e+01 1.42379e+00 112 2023 5 6.15246e+01 8.23521e-01 96 2023 6 6.29259e+01 1.77128e-01 144 2023 7 6.15144e+01 9.32000e-01 144 2023 8 5.81543e+01 1.05208e+00 112 2023 9 5.21495e+01 1.56253e+00 110 2023 10 4.11417e+01 2.18074e+00 186 2023 11 3.52703e+01 2.03601e+00 160 2023 12 2.96304e+01 1.93779e-01 80 2024 1 3.20168e+01 1.84290e+00 80 2024 2 4.14058e+01 2.32810e+00 159 2024 3 5.11420e+01 2.61334e+00 96 2024 4 nan nan 0