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 6.22065e+01 5.85895e-01 128 2002 8 5.75221e+01 1.36936e+00 112 2002 9 4.99744e+01 2.15983e+00 80 2002 10 4.33638e+01 2.22990e+00 128 2002 11 3.29212e+01 1.93056e+00 182 2002 12 2.91577e+01 4.71232e-01 175 2003 1 3.11406e+01 1.58496e+00 224 2003 2 3.84583e+01 2.10596e+00 144 2003 3 5.08091e+01 1.87790e+00 160 2003 4 5.72587e+01 2.11133e+00 122 2003 5 6.24989e+01 7.66232e-01 91 2003 6 6.31377e+01 1.70658e-01 80 2003 7 6.21404e+01 7.44933e-01 53 2003 8 5.71979e+01 1.11643e+00 118 2003 9 5.14565e+01 2.46961e+00 171 2003 10 4.20999e+01 2.71912e+00 217 2003 11 3.37615e+01 2.15326e+00 256 2003 12 2.91604e+01 4.69877e-01 254 2004 1 3.17858e+01 1.45496e+00 154 2004 2 4.02866e+01 1.68735e+00 80 2004 3 4.95429e+01 2.46634e+00 240 2004 4 5.71620e+01 2.17568e+00 169 2004 5 6.19499e+01 1.01269e+00 148 2004 6 6.31158e+01 1.42242e-01 64 2004 7 6.23073e+01 6.63424e-01 96 2004 8 5.75573e+01 2.11558e+00 96 2004 9 5.06588e+01 2.40369e+00 144 2004 10 4.26039e+01 3.11318e+00 112 2004 11 3.45033e+01 1.73750e+00 131 2004 12 2.89022e+01 1.49807e-01 142 2005 1 3.19147e+01 1.51048e+00 160 2005 2 3.87464e+01 1.60681e+00 112 2005 3 4.80396e+01 2.82491e+00 176 2005 4 5.75174e+01 1.42504e+00 112 2005 5 6.17680e+01 7.99267e-01 128 2005 6 6.32146e+01 1.30738e-01 64 2005 7 6.17643e+01 7.94804e-01 144 2005 8 5.82000e+01 6.01469e-01 58 2005 9 5.15505e+01 2.60526e+00 145 2005 10 4.16045e+01 2.45123e+00 272 2005 11 3.31796e+01 2.12428e+00 187 2005 12 2.91498e+01 5.88007e-01 112 2006 1 3.20757e+01 1.89032e+00 144 2006 2 3.98148e+01 2.80297e+00 176 2006 3 4.91408e+01 2.78096e+00 231 2006 4 5.72750e+01 1.87353e+00 192 2006 5 6.22970e+01 4.70785e-01 160 2006 6 6.31416e+01 2.04515e-01 169 2006 7 6.20085e+01 8.07041e-01 58 2006 8 5.81959e+01 1.85317e+00 79 2006 9 5.10869e+01 2.76559e+00 178 2006 10 4.26139e+01 2.78744e+00 222 2006 11 3.38443e+01 1.91229e+00 260 2006 12 2.93783e+01 5.72861e-01 160 2007 1 3.20237e+01 1.81723e+00 98 2007 2 3.94257e+01 2.01156e+00 128 2007 3 4.90567e+01 2.48529e+00 224 2007 4 5.82108e+01 1.68884e+00 142 2007 5 6.14220e+01 8.76211e-01 96 2007 6 6.31773e+01 2.05665e-01 112 2007 7 6.25426e+01 3.47665e-01 96 2007 8 5.76271e+01 1.49318e+00 123 2007 9 5.02269e+01 2.50259e+00 144 2007 10 4.27099e+01 2.85880e+00 253 2007 11 3.40157e+01 2.01834e+00 238 2007 12 2.92583e+01 3.36844e-01 128 2008 1 3.09628e+01 1.99433e+00 128 2008 2 3.93785e+01 2.57679e+00 192 2008 3 4.92576e+01 2.92433e+00 167 2008 4 5.86904e+01 1.09249e+00 160 2008 5 6.21322e+01 9.55921e-01 112 2008 6 6.32372e+01 2.04807e-01 126 2008 7 6.19189e+01 7.78172e-01 66 2008 8 5.63182e+01 1.72947e+00 97 2008 9 5.09112e+01 2.45200e+00 192 2008 10 4.04103e+01 2.58018e+00 192 2008 11 3.34965e+01 1.79968e+00 272 2008 12 2.91137e+01 4.38991e-01 112 2009 1 3.21711e+01 1.82512e+00 205 2009 2 3.83230e+01 2.70611e+00 112 2009 3 4.82525e+01 2.55504e+00 129 2009 4 5.77908e+01 1.91257e+00 128 2009 5 6.24331e+01 6.57813e-01 64 2009 6 6.31923e+01 1.52624e-01 144 2009 7 6.23280e+01 3.74063e-01 97 2009 8 5.79468e+01 1.59755e+00 112 2009 9 4.98621e+01 2.66599e+00 152 2009 10 4.29464e+01 2.41660e+00 172 2009 11 3.37896e+01 1.88795e+00 224 2009 12 2.88767e+01 9.87096e-02 80 2010 1 3.07930e+01 1.48999e+00 144 2010 2 4.01622e+01 2.03816e+00 144 2010 3 4.86111e+01 3.17717e+00 140 2010 4 5.72756e+01 1.86370e+00 192 2010 5 6.19705e+01 1.00301e+00 144 2010 6 6.30762e+01 7.95040e-02 160 2010 7 6.19784e+01 7.81804e-01 124 2010 8 5.78934e+01 1.49669e+00 32 2010 9 5.11230e+01 2.51705e+00 208 2010 10 4.28469e+01 2.53775e+00 320 2010 11 3.44353e+01 1.68536e+00 191 2010 12 2.93406e+01 5.27727e-01 224 2011 1 3.12161e+01 1.75217e+00 176 2011 2 4.06964e+01 1.72589e+00 183 2011 3 4.99917e+01 1.83682e+00 176 2011 4 5.72687e+01 1.89704e+00 144 2011 5 6.19470e+01 8.47247e-01 240 2011 6 6.32184e+01 1.60588e-01 128 2011 7 6.17406e+01 9.91773e-01 112 2011 8 5.73721e+01 1.49298e+00 178 2011 9 5.09300e+01 2.48281e+00 200 2011 10 4.24862e+01 2.89480e+00 272 2011 11 3.39357e+01 2.31148e+00 176 2011 12 2.91979e+01 6.22890e-01 121 2012 1 3.15220e+01 1.94017e+00 229 2012 2 3.85559e+01 1.12764e+00 56 2012 3 4.97876e+01 2.40525e+00 169 2012 4 5.74538e+01 2.03799e+00 208 2012 5 6.18838e+01 8.61120e-01 144 2012 6 6.32423e+01 1.52379e-01 97 2012 7 6.19972e+01 5.53420e-01 64 2012 8 5.74703e+01 1.20032e+00 76 2012 9 5.12591e+01 2.22634e+00 224 2012 10 4.13490e+01 2.36001e+00 288 2012 11 3.36067e+01 2.09786e+00 304 2012 12 2.91795e+01 4.84261e-01 85 2013 1 3.26089e+01 1.63710e+00 144 2013 2 3.77751e+01 2.01060e+00 82 2013 3 4.97052e+01 3.01064e+00 184 2013 4 5.67717e+01 1.59156e+00 96 2013 5 6.18569e+01 8.81170e-01 171 2013 6 6.31936e+01 1.34537e-01 105 2013 7 6.20820e+01 5.72774e-01 128 2013 8 5.68401e+01 1.12377e+00 80 2013 9 5.09418e+01 2.43490e+00 240 2013 10 4.27254e+01 2.48619e+00 224 2013 11 3.36459e+01 2.41116e+00 160 2013 12 2.90754e+01 4.61078e-01 112 2014 1 3.10571e+01 9.32837e-01 128 2014 2 3.99155e+01 2.05865e+00 152 2014 3 4.97688e+01 2.98716e+00 176 2014 4 5.65335e+01 1.91644e+00 112 2014 5 6.19513e+01 7.92769e-01 176 2014 6 6.31559e+01 1.39316e-01 148 2014 7 6.24863e+01 8.55829e-01 80 2014 8 5.69232e+01 1.15312e+00 112 2014 9 5.16615e+01 1.88617e+00 160 2014 10 4.16594e+01 2.79941e+00 324 2014 11 3.37108e+01 2.24358e+00 210 2014 12 2.92886e+01 4.59438e-01 172 2015 1 3.24432e+01 1.89061e+00 165 2015 2 3.84599e+01 1.78497e+00 176 2015 3 4.92964e+01 1.77961e+00 80 2015 4 5.63689e+01 2.43844e+00 64 2015 5 6.15283e+01 9.94581e-01 176 2015 6 6.30929e+01 1.32378e-01 144 2015 7 6.19405e+01 7.34090e-01 144 2015 8 5.73521e+01 1.97363e+00 150 2015 9 5.06971e+01 2.34637e+00 144 2015 10 4.25870e+01 1.71660e+00 160 2015 11 3.29911e+01 1.91314e+00 207 2015 12 2.93835e+01 3.97221e-01 96 2016 1 3.17701e+01 1.72580e+00 160 2016 2 3.93000e+01 2.55005e+00 233 2016 3 4.89390e+01 2.62229e+00 112 2016 4 5.71421e+01 2.05059e+00 160 2016 5 6.19383e+01 8.60014e-01 160 2016 6 6.32585e+01 9.21485e-02 159 2016 7 6.25527e+01 4.90099e-01 112 2016 8 5.72255e+01 1.56547e+00 159 2016 9 4.94676e+01 2.31811e+00 208 2016 10 4.17424e+01 2.79078e+00 288 2016 11 3.37203e+01 1.90129e+00 263 2016 12 2.92119e+01 5.86602e-01 180 2017 1 3.19769e+01 1.85811e+00 174 2017 2 3.99996e+01 2.32833e+00 224 2017 3 4.99850e+01 2.46308e+00 160 2017 4 5.65388e+01 1.51754e+00 176 2017 5 6.17735e+01 8.30883e-01 120 2017 6 6.32050e+01 8.24820e-02 48 2017 7 6.18175e+01 7.61115e-01 176 2017 8 5.78711e+01 7.57233e-01 112 2017 9 4.95377e+01 2.24736e+00 169 2017 10 4.08820e+01 2.28515e+00 201 2017 11 3.37791e+01 1.94499e+00 254 2017 12 2.92030e+01 3.76861e-01 128 2018 1 3.18050e+01 1.71519e+00 208 2018 2 3.98417e+01 2.72380e+00 96 2018 3 4.86457e+01 2.89789e+00 224 2018 4 5.73948e+01 1.81961e+00 212 2018 5 6.15759e+01 8.32369e-01 112 2018 6 6.30627e+01 7.70021e-02 80 2018 7 6.20030e+01 7.19504e-01 122 2018 8 5.76200e+01 1.67270e+00 112 2018 9 5.13466e+01 2.14210e+00 215 2018 10 4.24207e+01 2.93862e+00 292 2018 11 3.34295e+01 1.81103e+00 96 2018 12 2.92800e+01 4.79062e-01 80 2019 1 3.15168e+01 1.72064e+00 192 2019 2 3.84775e+01 1.80909e+00 35 2019 3 5.01823e+01 3.03530e+00 176 2019 4 5.85757e+01 1.06730e+00 126 2019 5 6.18517e+01 9.16532e-01 224 2019 6 6.32476e+01 2.22799e-01 96 2019 7 6.22953e+01 6.44782e-01 126 2019 8 5.78370e+01 1.82221e+00 68 2019 9 5.08889e+01 2.67902e+00 271 2019 10 4.35613e+01 2.46436e+00 159 2019 11 3.35515e+01 2.20327e+00 176 2019 12 2.91794e+01 5.40310e-01 128 2020 1 3.13723e+01 1.95090e+00 128 2020 2 3.96336e+01 3.51851e+00 128 2020 3 4.87649e+01 2.96415e+00 96 2020 4 5.74972e+01 2.08377e+00 143 2020 5 6.15638e+01 8.32551e-01 158 2020 6 6.32923e+01 1.74715e-01 112 2020 7 6.18777e+01 7.30193e-01 73 2020 8 5.94999e+01 4.83092e-01 64 2020 9 5.14126e+01 2.83031e+00 96 2020 10 4.13808e+01 2.52848e+00 239 2020 11 3.39038e+01 1.78160e+00 208 2020 12 2.91499e+01 4.46350e-01 224 2021 1 3.14696e+01 1.82451e+00 144 2021 2 3.96844e+01 2.81556e+00 96 2021 3 4.79841e+01 2.40022e+00 128 2021 4 5.67548e+01 2.29720e+00 192 2021 5 6.22706e+01 7.99233e-01 144 2021 6 6.32081e+01 1.04715e-01 61 2021 7 6.15705e+01 5.06184e-01 160 2021 8 5.86103e+01 9.98482e-01 134 2021 9 5.08837e+01 2.73022e+00 144 2021 10 4.13823e+01 2.66943e+00 144 2021 11 3.33837e+01 1.96508e+00 256 2021 12 2.91782e+01 5.98571e-01 98 2022 1 3.24709e+01 1.83598e+00 160 2022 2 3.97471e+01 2.57581e+00 213 2022 3 4.89714e+01 3.16148e+00 236 2022 4 5.92022e+01 6.99173e-01 68 2022 5 6.19379e+01 9.48630e-01 112 2022 6 6.31576e+01 1.67309e-01 160 2022 7 6.20616e+01 7.97672e-01 140 2022 8 5.71318e+01 1.79876e+00 190 2022 9 5.03546e+01 2.27835e+00 233 2022 10 4.23606e+01 2.64425e+00 277 2022 11 3.40710e+01 2.13330e+00 180 2022 12 2.91115e+01 5.40392e-01 136 2023 1 3.12038e+01 1.85991e+00 165 2023 2 3.88095e+01 2.44069e+00 144 2023 3 4.81916e+01 1.77575e+00 64 2023 4 5.84909e+01 5.37015e-01 80 2023 5 6.18507e+01 1.04495e+00 112 2023 6 6.32236e+01 1.60776e-01 53 2023 7 6.20947e+01 9.54007e-01 130 2023 8 5.81037e+01 1.40968e+00 169 2023 9 5.13174e+01 1.91417e+00 144 2023 10 4.17260e+01 2.88079e+00 258 2023 11 3.38217e+01 2.20603e+00 192 2023 12 2.88757e+01 3.55073e-01 128 2024 1 3.13593e+01 1.87583e+00 128 2024 2 4.06148e+01 2.57871e+00 112 2024 3 5.06150e+01 2.74120e+00 126 2024 4 5.46555e+01 4.04503e-01 32