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 6.17300e+01 6.02318e-01 91 2002 8 5.76669e+01 8.26101e-01 96 2002 9 5.04240e+01 2.53240e+00 93 2002 10 4.34154e+01 2.59813e+00 176 2002 11 3.37132e+01 2.06976e+00 224 2002 12 2.95713e+01 4.29084e-01 174 2003 1 3.15549e+01 1.47137e+00 208 2003 2 3.90181e+01 2.45720e+00 176 2003 3 5.07973e+01 2.83087e+00 112 2003 4 5.71719e+01 2.11373e+00 174 2003 5 6.21257e+01 8.89777e-01 101 2003 6 6.29744e+01 1.50677e-01 82 2003 7 6.13964e+01 7.32688e-01 64 2003 8 5.75175e+01 1.43950e+00 106 2003 9 5.14955e+01 2.00065e+00 143 2003 10 4.23245e+01 2.76107e+00 224 2003 11 3.38650e+01 1.96790e+00 264 2003 12 2.95525e+01 4.31014e-01 232 2004 1 3.19782e+01 1.68900e+00 112 2004 2 3.95250e+01 1.57661e+00 49 2004 3 4.91500e+01 2.43286e+00 179 2004 4 5.74043e+01 2.12393e+00 176 2004 5 6.16452e+01 8.30276e-01 185 2004 6 6.31205e+01 8.70850e-02 48 2004 7 6.24516e+01 3.27155e-01 64 2004 8 5.70517e+01 1.76929e+00 160 2004 9 5.21125e+01 2.00252e+00 88 2004 10 4.19912e+01 2.57145e+00 175 2004 11 3.41176e+01 1.90743e+00 160 2004 12 2.92932e+01 1.51366e-01 128 2005 1 3.19680e+01 1.69764e+00 187 2005 2 3.88781e+01 1.60741e+00 112 2005 3 4.77279e+01 2.36845e+00 161 2005 4 5.71963e+01 1.28000e+00 144 2005 5 6.15819e+01 7.15265e-01 208 2005 6 6.31254e+01 2.06146e-01 92 2005 7 6.15762e+01 7.65110e-01 96 2005 8 5.74563e+01 1.16138e+00 108 2005 9 5.08537e+01 2.73055e+00 144 2005 10 4.18293e+01 2.55278e+00 275 2005 11 3.40635e+01 1.84358e+00 236 2005 12 2.95225e+01 5.21887e-01 128 2006 1 3.19064e+01 1.78695e+00 192 2006 2 3.96814e+01 2.65094e+00 192 2006 3 4.92104e+01 3.13513e+00 225 2006 4 5.70083e+01 1.94327e+00 174 2006 5 6.19324e+01 8.19289e-01 192 2006 6 6.30867e+01 1.26045e-01 192 2006 7 6.19352e+01 9.27476e-01 64 2006 8 5.78869e+01 1.68252e+00 128 2006 9 5.11115e+01 2.61179e+00 191 2006 10 4.23776e+01 3.06650e+00 240 2006 11 3.37685e+01 2.02713e+00 208 2006 12 2.97876e+01 5.09228e-01 160 2007 1 3.15669e+01 1.67020e+00 128 2007 2 3.97663e+01 2.20192e+00 176 2007 3 4.90758e+01 2.71389e+00 304 2007 4 5.81515e+01 1.57866e+00 144 2007 5 6.14535e+01 8.63373e-01 155 2007 6 6.31302e+01 2.21052e-01 144 2007 7 6.20232e+01 2.43186e-01 64 2007 8 5.68050e+01 1.42262e+00 112 2007 9 4.87213e+01 1.19083e+00 141 2007 10 4.31396e+01 1.93602e+00 182 2007 11 3.42737e+01 1.85695e+00 256 2007 12 2.96172e+01 2.05784e-01 126 2008 1 3.13063e+01 1.85220e+00 192 2008 2 3.93792e+01 2.84287e+00 267 2008 3 5.02294e+01 2.71557e+00 192 2008 4 5.85359e+01 1.30237e+00 192 2008 5 6.19429e+01 9.09550e-01 155 2008 6 6.30327e+01 1.31202e-01 160 2008 7 6.14084e+01 6.59269e-01 96 2008 8 5.81243e+01 1.82235e+00 80 2008 9 5.08229e+01 2.36296e+00 144 2008 10 4.16213e+01 2.70972e+00 267 2008 11 3.40779e+01 1.82243e+00 253 2008 12 2.95636e+01 4.13969e-01 146 2009 1 3.17904e+01 1.73861e+00 186 2009 2 3.90963e+01 2.78137e+00 208 2009 3 4.80681e+01 2.28067e+00 224 2009 4 5.80648e+01 1.65955e+00 124 2009 5 6.13857e+01 8.74968e-01 112 2009 6 6.31117e+01 6.39318e-02 108 2009 7 6.17573e+01 1.53915e-01 48 2009 8 5.71834e+01 1.06264e+00 144 2009 9 4.99240e+01 2.20208e+00 144 2009 10 4.23862e+01 2.65066e+00 178 2009 11 3.36733e+01 1.93779e+00 178 2009 12 2.93654e+01 1.28524e-01 48 2010 1 3.13466e+01 1.71885e+00 208 2010 2 3.99664e+01 2.21705e+00 207 2010 3 4.95037e+01 3.20869e+00 143 2010 4 5.73036e+01 1.56481e+00 177 2010 5 6.18870e+01 8.43216e-01 159 2010 6 6.30279e+01 7.04293e-02 128 2010 7 6.16287e+01 8.36675e-01 80 2010 8 5.96280e+01 3.71513e-01 32 2010 9 5.12142e+01 2.52633e+00 240 2010 10 4.23280e+01 2.55444e+00 353 2010 11 3.42093e+01 1.74270e+00 210 2010 12 2.97013e+01 4.80610e-01 253 2011 1 3.17936e+01 1.68754e+00 208 2011 2 4.05434e+01 1.77030e+00 206 2011 3 4.90302e+01 2.18508e+00 240 2011 4 5.67941e+01 1.86730e+00 176 2011 5 6.17051e+01 7.87480e-01 208 2011 6 6.30508e+01 1.26217e-01 128 2011 7 6.17153e+01 8.80071e-01 128 2011 8 5.76015e+01 1.40443e+00 223 2011 9 5.10901e+01 2.35015e+00 200 2011 10 4.25044e+01 2.81360e+00 295 2011 11 3.41960e+01 2.19152e+00 217 2011 12 2.95482e+01 5.31215e-01 145 2012 1 3.17495e+01 1.91718e+00 227 2012 2 4.10013e+01 2.28313e+00 64 2012 3 4.94678e+01 2.28915e+00 240 2012 4 5.72547e+01 1.98091e+00 185 2012 5 6.15833e+01 8.17391e-01 160 2012 6 6.31723e+01 2.08457e-01 85 2012 7 6.16663e+01 7.28519e-01 109 2012 8 5.75514e+01 1.62087e+00 89 2012 9 5.13590e+01 2.44269e+00 154 2012 10 4.13268e+01 2.22051e+00 243 2012 11 3.40774e+01 2.13959e+00 288 2012 12 2.96577e+01 4.53960e-01 96 2013 1 3.35046e+01 1.04644e+00 112 2013 2 3.95855e+01 2.88711e+00 80 2013 3 4.93825e+01 3.15328e+00 234 2013 4 5.69456e+01 1.86054e+00 128 2013 5 6.17749e+01 7.72156e-01 176 2013 6 6.29803e+01 5.16645e-02 64 2013 7 6.20627e+01 5.17143e-01 50 2013 8 5.78993e+01 1.84864e+00 144 2013 9 5.07324e+01 2.39453e+00 208 2013 10 4.23946e+01 2.61092e+00 228 2013 11 3.35756e+01 2.08276e+00 181 2013 12 2.93251e+01 1.86709e-01 157 2014 1 3.13527e+01 9.60953e-01 96 2014 2 4.04901e+01 1.81361e+00 184 2014 3 4.94135e+01 3.10301e+00 128 2014 4 5.70734e+01 2.05172e+00 112 2014 5 6.16484e+01 7.31508e-01 160 2014 6 6.30521e+01 1.45284e-01 138 2014 7 6.18057e+01 8.72624e-01 64 2014 8 5.75637e+01 1.87012e+00 160 2014 9 5.15821e+01 2.18875e+00 144 2014 10 4.20193e+01 2.81273e+00 336 2014 11 3.36943e+01 2.27555e+00 224 2014 12 2.96655e+01 3.77146e-01 224 2015 1 3.27031e+01 1.92532e+00 160 2015 2 3.86046e+01 1.72812e+00 172 2015 3 4.87446e+01 2.32245e+00 96 2015 4 5.45002e+01 6.35757e-01 48 2015 5 6.15124e+01 9.34005e-01 176 2015 6 6.29882e+01 1.56292e-01 145 2015 7 6.16000e+01 6.06669e-01 80 2015 8 5.76214e+01 1.89209e+00 145 2015 9 5.00173e+01 1.96332e+00 128 2015 10 4.21479e+01 2.01099e+00 176 2015 11 3.33786e+01 2.20118e+00 176 2015 12 2.96416e+01 3.25171e-01 100 2016 1 3.13141e+01 1.53368e+00 150 2016 2 4.01470e+01 2.27182e+00 230 2016 3 4.88463e+01 2.72462e+00 144 2016 4 5.66289e+01 1.86736e+00 128 2016 5 6.17483e+01 7.55480e-01 160 2016 6 6.30941e+01 1.37765e-01 160 2016 7 6.19930e+01 7.69652e-01 109 2016 8 5.73051e+01 1.44987e+00 135 2016 9 4.97635e+01 2.34931e+00 150 2016 10 4.15531e+01 2.53532e+00 318 2016 11 3.36683e+01 1.90851e+00 225 2016 12 2.95388e+01 5.10622e-01 210 2017 1 3.16333e+01 1.70505e+00 153 2017 2 3.98300e+01 2.71937e+00 270 2017 3 4.98183e+01 2.60421e+00 174 2017 4 5.57184e+01 8.21986e-01 96 2017 5 6.15444e+01 7.43940e-01 137 2017 6 6.30023e+01 1.92421e-01 84 2017 7 6.15613e+01 8.84457e-01 102 2017 8 5.77925e+01 1.29358e+00 90 2017 9 4.91605e+01 1.51961e+00 190 2017 10 4.10846e+01 2.61262e+00 190 2017 11 3.40524e+01 2.04089e+00 272 2017 12 2.96099e+01 3.53280e-01 128 2018 1 3.19580e+01 1.66185e+00 221 2018 2 4.09865e+01 2.08332e+00 134 2018 3 4.92039e+01 2.73873e+00 208 2018 4 5.75396e+01 1.97829e+00 194 2018 5 6.14364e+01 8.10517e-01 128 2018 6 6.29664e+01 1.21441e-01 66 2018 7 6.13387e+01 6.86047e-01 96 2018 8 5.79317e+01 1.28895e+00 58 2018 9 5.07723e+01 1.99270e+00 217 2018 10 4.20824e+01 2.72724e+00 256 2018 11 3.40999e+01 1.85596e+00 112 2018 12 2.96644e+01 4.50821e-01 104 2019 1 3.12786e+01 1.56642e+00 176 2019 2 4.15818e+01 2.32197e+00 80 2019 3 5.03223e+01 2.72130e+00 166 2019 4 5.87681e+01 9.91136e-01 107 2019 5 6.16025e+01 8.94431e-01 224 2019 6 6.30783e+01 1.32774e-01 96 2019 7 6.19821e+01 7.52924e-01 98 2019 8 5.84829e+01 1.55296e+00 96 2019 9 5.08770e+01 2.58476e+00 265 2019 10 4.34991e+01 2.26039e+00 155 2019 11 3.39373e+01 2.25864e+00 176 2019 12 2.95660e+01 4.20028e-01 112 2020 1 3.09218e+01 1.78359e+00 144 2020 2 3.97867e+01 3.47627e+00 128 2020 3 5.01365e+01 2.46176e+00 164 2020 4 5.72643e+01 2.13062e+00 192 2020 5 6.13245e+01 7.86622e-01 119 2020 6 6.31860e+01 1.28602e-01 111 2020 7 6.15624e+01 8.48216e-01 57 2020 8 5.95909e+01 3.30565e-01 64 2020 9 5.17176e+01 2.55273e+00 80 2020 10 4.16643e+01 2.36321e+00 224 2020 11 3.38370e+01 1.82618e+00 229 2020 12 2.95732e+01 4.22736e-01 256 2021 1 3.18918e+01 1.86814e+00 144 2021 2 4.05365e+01 3.30557e+00 95 2021 3 4.83874e+01 2.32958e+00 136 2021 4 5.66273e+01 2.23376e+00 160 2021 5 6.20925e+01 6.88640e-01 101 2021 6 6.29994e+01 1.19196e-01 84 2021 7 6.14239e+01 4.37090e-01 112 2021 8 5.78857e+01 1.21394e+00 100 2021 9 5.00388e+01 2.36542e+00 96 2021 10 4.23806e+01 2.52067e+00 111 2021 11 3.37400e+01 1.89408e+00 252 2021 12 2.95017e+01 5.08328e-01 128 2022 1 3.15647e+01 1.99012e+00 208 2022 2 3.96569e+01 2.04856e+00 158 2022 3 4.94095e+01 2.96332e+00 208 2022 4 5.87531e+01 6.55227e-01 64 2022 5 6.14594e+01 1.15013e+00 112 2022 6 6.31240e+01 1.62940e-01 192 2022 7 6.15073e+01 7.04736e-01 128 2022 8 5.74046e+01 1.65851e+00 144 2022 9 4.97070e+01 1.89218e+00 176 2022 10 4.29496e+01 2.38445e+00 288 2022 11 3.47963e+01 2.31693e+00 128 2022 12 2.95332e+01 4.78385e-01 190 2023 1 3.17178e+01 1.57350e+00 214 2023 2 3.89755e+01 2.18483e+00 148 2023 3 4.78563e+01 2.23203e+00 146 2023 4 5.78629e+01 1.45724e+00 96 2023 5 6.13264e+01 7.49178e-01 80 2023 6 6.30707e+01 1.93816e-01 74 2023 7 6.18460e+01 1.21904e+00 80 2023 8 5.81901e+01 1.39358e+00 128 2023 9 5.10895e+01 1.54602e+00 141 2023 10 4.08799e+01 2.41343e+00 260 2023 11 3.46395e+01 2.00528e+00 142 2023 12 2.92037e+01 1.98254e-01 80 2024 1 3.19014e+01 1.63024e+00 132 2024 2 4.12304e+01 1.96449e+00 128 2024 3 5.05516e+01 2.96311e+00 80 2024 4 nan nan 0