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 6.15876e+01 6.21551e-01 176 2002 8 5.60887e+01 8.59999e-01 112 2002 9 4.96192e+01 2.12974e+00 79 2002 10 4.33481e+01 1.90476e+00 96 2002 11 3.30996e+01 1.61326e+00 165 2002 12 2.93190e+01 5.27717e-01 176 2003 1 3.12637e+01 1.44250e+00 256 2003 2 3.90779e+01 2.35377e+00 224 2003 3 5.02773e+01 1.87485e+00 144 2003 4 5.72442e+01 1.97147e+00 144 2003 5 6.17919e+01 1.38315e+00 32 2003 6 nan nan 0 2003 7 6.18618e+01 8.59917e-01 64 2003 8 5.79282e+01 1.12341e+00 90 2003 9 5.06117e+01 2.25526e+00 133 2003 10 4.22825e+01 2.56383e+00 208 2003 11 3.39366e+01 2.21161e+00 270 2003 12 2.92094e+01 4.06982e-01 208 2004 1 3.20347e+01 1.44507e+00 144 2004 2 4.07382e+01 2.19540e+00 80 2004 3 4.95767e+01 2.20813e+00 160 2004 4 5.68799e+01 2.11942e+00 164 2004 5 6.17509e+01 9.04478e-01 124 2004 6 6.31381e+01 1.04840e-01 96 2004 7 6.16956e+01 8.44211e-01 80 2004 8 5.82773e+01 1.55672e+00 124 2004 9 5.09150e+01 2.34213e+00 176 2004 10 4.22802e+01 2.71947e+00 135 2004 11 3.49204e+01 1.89746e+00 94 2004 12 2.89753e+01 1.67612e-01 160 2005 1 3.24687e+01 1.30594e+00 128 2005 2 3.85672e+01 1.55082e+00 64 2005 3 4.84483e+01 2.54625e+00 150 2005 4 5.66474e+01 1.23225e+00 128 2005 5 6.17307e+01 7.72036e-01 147 2005 6 6.32225e+01 1.54674e-01 164 2005 7 6.21318e+01 6.36784e-01 96 2005 8 5.68510e+01 2.02064e+00 64 2005 9 5.15616e+01 2.47792e+00 192 2005 10 4.11998e+01 2.22553e+00 304 2005 11 3.27505e+01 2.08323e+00 189 2005 12 2.90924e+01 4.93371e-01 131 2006 1 3.23231e+01 1.88818e+00 128 2006 2 3.97003e+01 2.78179e+00 176 2006 3 4.86743e+01 2.85116e+00 254 2006 4 5.69314e+01 1.73187e+00 145 2006 5 6.18173e+01 9.06201e-01 208 2006 6 6.31793e+01 1.51847e-01 177 2006 7 6.15302e+01 6.44714e-01 64 2006 8 5.75141e+01 1.56297e+00 176 2006 9 5.03066e+01 2.68220e+00 165 2006 10 4.21524e+01 3.00488e+00 208 2006 11 3.33736e+01 2.08600e+00 221 2006 12 2.95369e+01 6.00133e-01 176 2007 1 3.17600e+01 1.48043e+00 73 2007 2 3.90895e+01 2.02590e+00 128 2007 3 4.86904e+01 2.70687e+00 219 2007 4 5.79916e+01 1.48385e+00 144 2007 5 6.14369e+01 7.66811e-01 61 2007 6 6.31414e+01 1.77621e-01 94 2007 7 6.21325e+01 7.28037e-01 96 2007 8 5.64732e+01 9.09991e-01 80 2007 9 5.09323e+01 2.29570e+00 128 2007 10 4.17020e+01 3.22297e+00 171 2007 11 3.42577e+01 2.05769e+00 224 2007 12 2.91836e+01 2.99590e-01 144 2008 1 3.11496e+01 2.04356e+00 128 2008 2 4.00404e+01 2.83616e+00 264 2008 3 4.92703e+01 2.82204e+00 144 2008 4 5.86040e+01 1.30579e+00 126 2008 5 6.18644e+01 9.67875e-01 90 2008 6 6.31738e+01 1.54849e-01 189 2008 7 6.22084e+01 3.70173e-01 87 2008 8 5.65377e+01 1.12301e+00 116 2008 9 4.89636e+01 1.96886e+00 128 2008 10 4.13940e+01 2.97492e+00 179 2008 11 3.36708e+01 1.85939e+00 272 2008 12 2.92484e+01 4.33520e-01 163 2009 1 3.13728e+01 1.67479e+00 191 2009 2 3.86777e+01 2.80264e+00 154 2009 3 4.86732e+01 2.85134e+00 111 2009 4 5.77944e+01 1.50823e+00 96 2009 5 6.26983e+01 3.84221e-01 48 2009 6 6.31674e+01 7.77346e-02 123 2009 7 6.24857e+01 3.41655e-01 48 2009 8 5.81902e+01 1.35641e+00 131 2009 9 4.84398e+01 1.13812e+00 119 2009 10 4.20803e+01 2.03871e+00 146 2009 11 3.44207e+01 2.25977e+00 176 2009 12 2.90907e+01 1.92811e-01 82 2010 1 3.12962e+01 1.60238e+00 174 2010 2 4.05862e+01 2.16947e+00 176 2010 3 4.80676e+01 2.74027e+00 154 2010 4 5.74904e+01 1.95358e+00 160 2010 5 6.18882e+01 8.55246e-01 115 2010 6 6.29709e+01 1.72995e-01 138 2010 7 6.20449e+01 6.81966e-01 80 2010 8 5.78515e+01 1.45903e+00 96 2010 9 5.13042e+01 2.51537e+00 176 2010 10 4.24288e+01 2.76129e+00 330 2010 11 3.42044e+01 1.88702e+00 200 2010 12 2.93675e+01 5.02137e-01 224 2011 1 3.13462e+01 1.68226e+00 190 2011 2 4.07926e+01 1.77906e+00 192 2011 3 5.00576e+01 1.62590e+00 173 2011 4 5.70612e+01 1.98952e+00 128 2011 5 6.18954e+01 7.44521e-01 133 2011 6 6.31823e+01 1.65892e-01 168 2011 7 6.18307e+01 7.27868e-01 124 2011 8 5.74502e+01 1.59596e+00 160 2011 9 5.11306e+01 2.36210e+00 192 2011 10 4.19356e+01 2.83649e+00 296 2011 11 3.31320e+01 2.31227e+00 125 2011 12 2.92032e+01 5.83124e-01 84 2012 1 3.12103e+01 1.68387e+00 204 2012 2 3.85350e+01 2.02639e-01 32 2012 3 4.91861e+01 3.20121e+00 192 2012 4 5.73128e+01 2.09139e+00 148 2012 5 6.23162e+01 7.88031e-01 142 2012 6 6.31710e+01 1.14480e-01 150 2012 7 6.16590e+01 7.08758e-01 79 2012 8 5.78865e+01 1.37338e+00 79 2012 9 5.03858e+01 2.27502e+00 161 2012 10 4.14668e+01 2.71721e+00 304 2012 11 3.36881e+01 2.17138e+00 272 2012 12 2.92906e+01 4.26481e-01 144 2013 1 3.28717e+01 1.72558e+00 144 2013 2 3.88577e+01 2.27060e+00 116 2013 3 4.97162e+01 3.00595e+00 239 2013 4 5.69691e+01 1.85707e+00 84 2013 5 6.17721e+01 7.62805e-01 121 2013 6 6.31086e+01 1.43258e-01 80 2013 7 6.18461e+01 7.01515e-01 144 2013 8 5.64964e+01 1.00241e+00 80 2013 9 5.09056e+01 2.66256e+00 192 2013 10 4.21399e+01 2.18050e+00 160 2013 11 3.38874e+01 2.34573e+00 158 2013 12 2.91357e+01 4.25858e-01 112 2014 1 3.19321e+01 1.34816e+00 160 2014 2 3.85770e+01 1.80480e+00 144 2014 3 4.97851e+01 2.86638e+00 144 2014 4 5.77113e+01 1.30793e+00 80 2014 5 6.17759e+01 7.74067e-01 157 2014 6 6.30631e+01 7.87675e-02 51 2014 7 6.18184e+01 8.79839e-01 114 2014 8 5.79886e+01 1.61524e+00 144 2014 9 5.19170e+01 1.72402e+00 112 2014 10 4.15893e+01 2.76907e+00 293 2014 11 3.36846e+01 2.20800e+00 213 2014 12 2.93827e+01 4.30981e-01 160 2015 1 3.26866e+01 1.64414e+00 176 2015 2 3.82928e+01 1.56815e+00 192 2015 3 4.97669e+01 2.37754e+00 116 2015 4 5.61030e+01 2.20076e+00 67 2015 5 6.12561e+01 9.59692e-01 133 2015 6 6.30846e+01 1.32055e-01 160 2015 7 6.19876e+01 5.86313e-01 69 2015 8 5.72765e+01 1.67107e+00 192 2015 9 5.11139e+01 2.14599e+00 144 2015 10 4.28439e+01 1.70016e+00 176 2015 11 3.29291e+01 2.12832e+00 124 2015 12 2.93314e+01 3.53104e-01 112 2016 1 3.19675e+01 1.67447e+00 140 2016 2 3.94996e+01 2.79151e+00 256 2016 3 4.92172e+01 2.79499e+00 96 2016 4 5.73008e+01 1.95341e+00 174 2016 5 6.20253e+01 8.70043e-01 192 2016 6 6.31997e+01 7.30785e-02 100 2016 7 6.22924e+01 5.84202e-01 100 2016 8 5.71731e+01 1.22456e+00 129 2016 9 4.91538e+01 1.60394e+00 144 2016 10 4.20696e+01 2.66971e+00 288 2016 11 3.34808e+01 2.01547e+00 236 2016 12 2.92557e+01 5.07436e-01 171 2017 1 3.21961e+01 1.91546e+00 200 2017 2 4.00220e+01 2.69538e+00 192 2017 3 5.07780e+01 2.03936e+00 159 2017 4 5.63285e+01 1.63495e+00 104 2017 5 6.18546e+01 7.74076e-01 176 2017 6 6.31254e+01 7.53441e-02 96 2017 7 6.19691e+01 6.77830e-01 107 2017 8 5.80384e+01 9.94108e-01 112 2017 9 4.98715e+01 2.27182e+00 208 2017 10 4.02961e+01 2.23757e+00 177 2017 11 3.33389e+01 1.94452e+00 208 2017 12 2.92283e+01 4.06596e-01 138 2018 1 3.16714e+01 1.83058e+00 224 2018 2 4.00078e+01 2.68485e+00 75 2018 3 4.89020e+01 2.97235e+00 192 2018 4 5.73246e+01 1.98577e+00 208 2018 5 6.15341e+01 7.13195e-01 176 2018 6 6.30233e+01 1.19324e-01 120 2018 7 6.17584e+01 6.04361e-01 112 2018 8 5.83985e+01 1.31145e+00 112 2018 9 5.17234e+01 1.09722e+00 144 2018 10 4.16855e+01 2.94110e+00 188 2018 11 3.37092e+01 1.71105e+00 109 2018 12 2.93476e+01 4.89317e-01 128 2019 1 3.16987e+01 1.84694e+00 162 2019 2 4.07298e+01 2.65524e+00 38 2019 3 4.98592e+01 2.76556e+00 192 2019 4 5.85939e+01 1.21427e+00 112 2019 5 6.20382e+01 7.94510e-01 128 2019 6 6.31994e+01 1.59723e-01 96 2019 7 6.19805e+01 8.87055e-01 112 2019 8 5.73492e+01 1.70913e+00 80 2019 9 5.06936e+01 2.56916e+00 256 2019 10 4.34909e+01 2.74197e+00 129 2019 11 3.33885e+01 2.34220e+00 144 2019 12 2.94097e+01 5.50469e-01 176 2020 1 3.15752e+01 1.63659e+00 128 2020 2 3.92021e+01 3.22013e+00 117 2020 3 4.93934e+01 3.18459e+00 69 2020 4 5.76141e+01 2.10205e+00 128 2020 5 6.12353e+01 6.59750e-01 112 2020 6 6.32970e+01 8.50840e-02 96 2020 7 6.20683e+01 4.29251e-01 59 2020 8 5.95400e+01 6.69441e-01 97 2020 9 5.09429e+01 3.08050e+00 112 2020 10 4.14086e+01 2.46605e+00 165 2020 11 3.41450e+01 1.73953e+00 208 2020 12 2.93151e+01 4.54762e-01 208 2021 1 3.15178e+01 1.70729e+00 176 2021 2 4.02139e+01 2.98938e+00 125 2021 3 4.71094e+01 1.48692e+00 96 2021 4 5.64755e+01 2.17412e+00 144 2021 5 6.22065e+01 9.08405e-01 96 2021 6 6.30807e+01 1.55958e-01 35 2021 7 6.13610e+01 4.86465e-01 128 2021 8 5.84762e+01 1.16450e+00 96 2021 9 5.15856e+01 2.57430e+00 113 2021 10 4.19729e+01 2.31553e+00 144 2021 11 3.36995e+01 2.02643e+00 208 2021 12 2.91336e+01 4.51882e-01 128 2022 1 3.25523e+01 1.79565e+00 176 2022 2 3.92304e+01 2.06763e+00 176 2022 3 4.92178e+01 3.10772e+00 183 2022 4 5.92235e+01 7.77512e-01 80 2022 5 6.19527e+01 8.27419e-01 120 2022 6 6.31498e+01 1.39426e-01 144 2022 7 6.16056e+01 8.15516e-01 146 2022 8 5.69043e+01 1.90125e+00 128 2022 9 5.05401e+01 2.24684e+00 256 2022 10 4.28742e+01 2.37338e+00 262 2022 11 3.41115e+01 2.05502e+00 176 2022 12 2.91873e+01 5.15217e-01 115 2023 1 3.16991e+01 1.85700e+00 205 2023 2 3.87091e+01 2.64629e+00 144 2023 3 4.82016e+01 2.71940e+00 86 2023 4 5.80481e+01 1.69960e+00 63 2023 5 6.20257e+01 7.98992e-01 160 2023 6 6.31628e+01 1.30418e-01 139 2023 7 6.17060e+01 7.25234e-01 152 2023 8 5.80665e+01 1.66474e+00 184 2023 9 5.12190e+01 1.93367e+00 208 2023 10 4.16313e+01 3.26159e+00 177 2023 11 3.42307e+01 2.17405e+00 169 2023 12 2.89350e+01 2.20414e-01 144 2024 1 3.21444e+01 1.73187e+00 96 2024 2 4.07190e+01 2.14975e+00 117 2024 3 4.93568e+01 3.31393e+00 86 2024 4 5.47219e+01 3.32884e-01 32