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 6.15295e+01 6.97300e-01 96 2002 8 5.74400e+01 7.67976e-01 64 2002 9 5.02879e+01 2.27519e+00 39 2002 10 4.37863e+01 2.34722e+00 111 2002 11 3.38479e+01 2.29158e+00 160 2002 12 2.97264e+01 4.22582e-01 178 2003 1 3.18863e+01 1.55980e+00 192 2003 2 3.89904e+01 2.24336e+00 176 2003 3 5.14039e+01 1.84525e+00 107 2003 4 5.68737e+01 2.13031e+00 128 2003 5 6.21300e+01 7.43339e-01 96 2003 6 6.30124e+01 1.03204e-01 62 2003 7 6.21177e+01 4.34053e-01 32 2003 8 5.76818e+01 1.16280e+00 88 2003 9 5.12688e+01 1.39082e+00 104 2003 10 4.22331e+01 2.63375e+00 206 2003 11 3.33301e+01 1.87071e+00 176 2003 12 2.96298e+01 4.12007e-01 144 2004 1 3.21359e+01 1.44115e+00 176 2004 2 4.27844e+01 1.89007e+00 32 2004 3 4.96703e+01 2.48260e+00 192 2004 4 5.74924e+01 2.02978e+00 160 2004 5 6.17493e+01 8.79009e-01 237 2004 6 6.29674e+01 8.52857e-02 86 2004 7 6.21528e+01 2.87196e-01 60 2004 8 5.76232e+01 1.76319e+00 96 2004 9 5.03538e+01 2.00080e+00 144 2004 10 4.14839e+01 2.85601e+00 98 2004 11 3.40536e+01 2.31997e+00 96 2004 12 2.94577e+01 1.31943e-01 128 2005 1 3.19852e+01 1.54999e+00 116 2005 2 3.92761e+01 1.55146e+00 127 2005 3 4.83483e+01 2.78292e+00 192 2005 4 5.70241e+01 1.52540e+00 128 2005 5 6.15619e+01 6.75706e-01 128 2005 6 6.31267e+01 1.57222e-01 80 2005 7 6.17841e+01 4.22825e-01 81 2005 8 5.80196e+01 5.68398e-01 80 2005 9 5.13687e+01 2.55328e+00 159 2005 10 4.13172e+01 2.16138e+00 208 2005 11 3.41466e+01 2.08945e+00 233 2005 12 2.97148e+01 5.21485e-01 112 2006 1 3.24970e+01 1.80579e+00 178 2006 2 3.96441e+01 2.60803e+00 141 2006 3 4.97253e+01 2.89619e+00 212 2006 4 5.77061e+01 1.83772e+00 206 2006 5 6.19046e+01 7.36434e-01 192 2006 6 6.30588e+01 1.32193e-01 179 2006 7 6.13470e+01 9.44265e-01 64 2006 8 5.76990e+01 1.71852e+00 129 2006 9 5.14184e+01 2.71276e+00 144 2006 10 4.29436e+01 2.78736e+00 240 2006 11 3.41164e+01 2.13626e+00 208 2006 12 2.99712e+01 5.53165e-01 128 2007 1 3.16631e+01 1.24133e+00 96 2007 2 3.98098e+01 2.40211e+00 144 2007 3 4.92006e+01 2.61826e+00 252 2007 4 5.82555e+01 1.83868e+00 192 2007 5 6.10815e+01 6.67889e-01 112 2007 6 6.30715e+01 2.30229e-01 128 2007 7 6.21898e+01 4.29424e-01 85 2007 8 5.66314e+01 9.40393e-01 48 2007 9 4.91733e+01 1.32586e+00 80 2007 10 4.38715e+01 2.17395e+00 180 2007 11 3.47456e+01 1.76296e+00 220 2007 12 2.97774e+01 3.17151e-01 80 2008 1 3.19905e+01 2.16589e+00 128 2008 2 4.02125e+01 2.68791e+00 209 2008 3 5.03988e+01 2.66929e+00 154 2008 4 5.89804e+01 1.14935e+00 144 2008 5 6.17822e+01 8.98572e-01 112 2008 6 6.30286e+01 1.96726e-01 153 2008 7 6.17839e+01 2.87691e-01 45 2008 8 5.72271e+01 1.68504e+00 111 2008 9 5.05896e+01 1.97073e+00 144 2008 10 4.08654e+01 2.44575e+00 216 2008 11 3.46026e+01 1.96005e+00 193 2008 12 2.96698e+01 4.96940e-01 132 2009 1 3.13127e+01 1.56223e+00 160 2009 2 3.92308e+01 2.74757e+00 173 2009 3 4.76845e+01 2.24093e+00 116 2009 4 5.77078e+01 2.24049e+00 79 2009 5 6.12139e+01 6.42110e-01 89 2009 6 6.30687e+01 5.74594e-02 128 2009 7 6.20021e+01 4.75853e-01 35 2009 8 5.67229e+01 1.81407e-01 42 2009 9 5.11521e+01 2.08120e+00 80 2009 10 4.19972e+01 2.33997e+00 128 2009 11 3.44760e+01 2.22043e+00 135 2009 12 2.95067e+01 1.16371e-01 48 2010 1 3.12343e+01 1.42864e+00 160 2010 2 4.02742e+01 1.97350e+00 128 2010 3 4.93623e+01 2.92977e+00 160 2010 4 5.74186e+01 1.89860e+00 197 2010 5 6.19337e+01 8.38566e-01 192 2010 6 6.29163e+01 1.11013e-01 138 2010 7 6.21360e+01 7.96471e-01 64 2010 8 5.81825e+01 1.26608e+00 80 2010 9 5.02325e+01 1.96489e+00 164 2010 10 4.24782e+01 2.67444e+00 327 2010 11 3.42976e+01 1.74943e+00 224 2010 12 3.00235e+01 4.67173e-01 176 2011 1 3.18665e+01 1.57886e+00 168 2011 2 4.15751e+01 1.91113e+00 208 2011 3 4.92813e+01 1.88053e+00 160 2011 4 5.77423e+01 1.93931e+00 160 2011 5 6.18811e+01 7.49674e-01 126 2011 6 6.30281e+01 1.72804e-01 176 2011 7 6.14411e+01 7.70673e-01 117 2011 8 5.73400e+01 1.35442e+00 168 2011 9 5.16430e+01 2.38490e+00 137 2011 10 4.27449e+01 2.85835e+00 318 2011 11 3.43397e+01 2.19852e+00 144 2011 12 2.97549e+01 5.40262e-01 134 2012 1 3.22065e+01 1.84270e+00 224 2012 2 4.11062e+01 2.20790e+00 64 2012 3 4.95396e+01 2.18923e+00 208 2012 4 5.79287e+01 1.81952e+00 198 2012 5 6.19321e+01 8.02197e-01 196 2012 6 6.31370e+01 1.94070e-01 112 2012 7 6.16418e+01 5.63275e-01 101 2012 8 5.72931e+01 1.16112e+00 80 2012 9 5.05538e+01 2.58954e+00 107 2012 10 4.15243e+01 2.16250e+00 208 2012 11 3.47084e+01 1.97145e+00 242 2012 12 2.98082e+01 4.51694e-01 96 2013 1 3.36950e+01 1.22742e+00 128 2013 2 3.99373e+01 2.77519e+00 80 2013 3 4.99724e+01 2.89494e+00 171 2013 4 5.74620e+01 2.00625e+00 69 2013 5 6.17187e+01 6.63931e-01 144 2013 6 6.29696e+01 1.44386e-01 80 2013 7 6.18907e+01 6.28978e-01 80 2013 8 5.76712e+01 1.61995e+00 110 2013 9 5.18936e+01 2.34219e+00 168 2013 10 4.22182e+01 2.54494e+00 195 2013 11 3.37180e+01 2.23600e+00 128 2013 12 2.95242e+01 2.42427e-01 117 2014 1 3.20042e+01 1.22875e+00 109 2014 2 4.05915e+01 2.02130e+00 128 2014 3 5.02058e+01 3.02745e+00 145 2014 4 5.71309e+01 2.00592e+00 112 2014 5 6.17391e+01 6.52046e-01 144 2014 6 6.30039e+01 1.27002e-01 136 2014 7 6.21823e+01 6.00908e-01 48 2014 8 5.70246e+01 1.24815e+00 144 2014 9 5.19028e+01 1.90674e+00 144 2014 10 4.20784e+01 2.68959e+00 285 2014 11 3.39363e+01 2.36860e+00 208 2014 12 2.98320e+01 4.12485e-01 176 2015 1 3.27748e+01 1.81919e+00 160 2015 2 3.86060e+01 1.58448e+00 187 2015 3 4.90625e+01 2.41145e+00 176 2015 4 5.45992e+01 6.00010e-01 48 2015 5 6.14192e+01 9.25047e-01 160 2015 6 6.29883e+01 1.45845e-01 132 2015 7 6.17332e+01 7.55071e-01 140 2015 8 5.66723e+01 1.24635e+00 92 2015 9 5.18623e+01 2.04431e+00 112 2015 10 4.17913e+01 2.07879e+00 182 2015 11 3.27654e+01 1.59050e+00 127 2015 12 2.98070e+01 2.88721e-01 110 2016 1 3.18334e+01 1.61993e+00 156 2016 2 3.97003e+01 2.60557e+00 224 2016 3 4.81440e+01 2.34631e+00 112 2016 4 5.72245e+01 2.02217e+00 144 2016 5 6.16894e+01 7.88784e-01 208 2016 6 6.30009e+01 1.19725e-01 148 2016 7 6.18920e+01 8.30182e-01 128 2016 8 5.73107e+01 1.25123e+00 104 2016 9 4.92779e+01 1.71062e+00 128 2016 10 4.17703e+01 2.53086e+00 305 2016 11 3.33502e+01 1.46489e+00 176 2016 12 2.96427e+01 4.78148e-01 218 2017 1 3.16143e+01 1.50635e+00 144 2017 2 4.03252e+01 2.48347e+00 272 2017 3 5.01833e+01 2.67647e+00 129 2017 4 5.67295e+01 1.21952e+00 125 2017 5 6.13417e+01 5.77376e-01 112 2017 6 6.31024e+01 1.46802e-01 32 2017 7 6.14535e+01 6.27452e-01 96 2017 8 5.72231e+01 1.53416e+00 47 2017 9 5.04614e+01 2.19112e+00 160 2017 10 4.12132e+01 2.64842e+00 180 2017 11 3.35488e+01 2.06672e+00 192 2017 12 2.96003e+01 1.49135e-01 96 2018 1 3.20710e+01 1.65861e+00 176 2018 2 4.08876e+01 2.53309e+00 93 2018 3 4.89923e+01 2.64813e+00 180 2018 4 5.78323e+01 2.04990e+00 160 2018 5 6.11357e+01 7.73893e-01 128 2018 6 6.28815e+01 9.80347e-02 80 2018 7 6.15143e+01 7.35217e-01 112 2018 8 5.86591e+01 1.20864e+00 46 2018 9 5.08811e+01 2.05609e+00 201 2018 10 4.24647e+01 2.34594e+00 192 2018 11 3.36227e+01 1.83103e+00 80 2018 12 2.97647e+01 4.57299e-01 80 2019 1 3.24638e+01 1.63906e+00 176 2019 2 4.20867e+01 2.34982e+00 40 2019 3 4.99605e+01 2.89855e+00 191 2019 4 5.89626e+01 9.68243e-01 112 2019 5 6.15912e+01 8.40453e-01 224 2019 6 6.29703e+01 1.49726e-01 80 2019 7 6.21352e+01 8.01250e-01 80 2019 8 5.84058e+01 1.57370e+00 128 2019 9 5.07601e+01 2.55320e+00 288 2019 10 4.43317e+01 1.74783e+00 92 2019 11 3.36016e+01 2.17832e+00 194 2019 12 2.95288e+01 1.31143e-01 100 2020 1 3.14563e+01 1.69032e+00 144 2020 2 3.93307e+01 3.28488e+00 110 2020 3 4.99783e+01 2.09389e+00 174 2020 4 5.74126e+01 2.20685e+00 144 2020 5 6.12950e+01 7.33870e-01 128 2020 6 6.31042e+01 1.20425e-01 85 2020 7 6.19421e+01 4.77746e-01 64 2020 8 5.95216e+01 5.87788e-01 70 2020 9 5.16453e+01 2.86846e+00 96 2020 10 4.21762e+01 2.47487e+00 160 2020 11 3.41343e+01 1.99050e+00 222 2020 12 2.97673e+01 4.21432e-01 163 2021 1 3.23293e+01 1.85847e+00 112 2021 2 3.97454e+01 2.81802e+00 96 2021 3 4.77682e+01 1.70375e+00 113 2021 4 5.69360e+01 2.29381e+00 166 2021 5 6.20926e+01 6.15522e-01 128 2021 6 6.30024e+01 7.37318e-02 80 2021 7 6.14512e+01 5.89724e-01 141 2021 8 5.88826e+01 9.08603e-01 88 2021 9 5.04945e+01 2.49968e+00 79 2021 10 4.23997e+01 2.70388e+00 97 2021 11 3.42532e+01 1.89966e+00 208 2021 12 2.95530e+01 4.44743e-01 112 2022 1 3.18221e+01 1.73205e+00 216 2022 2 4.02409e+01 2.25616e+00 158 2022 3 4.96910e+01 3.03558e+00 224 2022 4 5.84858e+01 4.02839e-01 32 2022 5 6.15277e+01 8.74108e-01 141 2022 6 6.30640e+01 1.27674e-01 144 2022 7 6.16625e+01 7.18778e-01 103 2022 8 5.85901e+01 8.74198e-01 73 2022 9 4.95900e+01 1.50804e+00 128 2022 10 4.32589e+01 2.39586e+00 266 2022 11 3.45272e+01 2.37035e+00 117 2022 12 2.96143e+01 4.82737e-01 128 2023 1 3.20515e+01 1.58973e+00 208 2023 2 4.05315e+01 2.58480e+00 209 2023 3 4.82113e+01 2.07948e+00 192 2023 4 5.74364e+01 1.67572e+00 103 2023 5 6.15333e+01 6.97373e-01 160 2023 6 6.29847e+01 1.52342e-01 109 2023 7 6.15049e+01 1.00967e+00 112 2023 8 5.81222e+01 1.13943e+00 144 2023 9 5.01755e+01 2.06417e+00 83 2023 10 4.04754e+01 2.22386e+00 192 2023 11 3.48123e+01 2.32668e+00 160 2023 12 2.95087e+01 3.20723e-01 56 2024 1 3.18087e+01 1.66173e+00 96 2024 2 4.12457e+01 2.26365e+00 128 2024 3 5.16390e+01 2.18608e+00 69 2024 4 nan nan 0