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 6.17439e+01 8.28538e-01 69 2002 8 5.79266e+01 7.00193e-01 64 2002 9 5.02135e+01 2.65189e+00 90 2002 10 4.40587e+01 2.16639e+00 163 2002 11 3.38081e+01 2.02115e+00 199 2002 12 3.00253e+01 5.66672e-01 192 2003 1 3.21140e+01 1.40480e+00 240 2003 2 3.95137e+01 2.51280e+00 173 2003 3 5.12874e+01 2.07335e+00 80 2003 4 5.69278e+01 2.03633e+00 144 2003 5 6.23596e+01 5.75787e-01 51 2003 6 6.30614e+01 9.26749e-02 96 2003 7 6.14442e+01 4.13348e-01 60 2003 8 5.67363e+01 6.91302e-01 64 2003 9 5.19042e+01 1.73129e+00 128 2003 10 4.22486e+01 2.45519e+00 224 2003 11 3.45869e+01 2.02300e+00 271 2003 12 2.99091e+01 4.88187e-01 161 2004 1 3.29427e+01 1.22368e+00 176 2004 2 4.20727e+01 1.75832e+00 48 2004 3 5.04000e+01 1.89370e+00 192 2004 4 5.73586e+01 2.13074e+00 164 2004 5 6.16352e+01 9.87600e-01 192 2004 6 6.30036e+01 8.99919e-02 76 2004 7 6.25783e+01 2.31349e-01 96 2004 8 5.75840e+01 1.81037e+00 112 2004 9 5.14222e+01 2.53198e+00 64 2004 10 4.33899e+01 2.58914e+00 110 2004 11 3.48268e+01 2.01359e+00 201 2004 12 2.95340e+01 1.89453e-01 151 2005 1 3.26377e+01 1.45544e+00 160 2005 2 3.90630e+01 1.52485e+00 143 2005 3 4.90960e+01 2.77415e+00 221 2005 4 5.72281e+01 1.78769e+00 176 2005 5 6.16724e+01 7.14467e-01 176 2005 6 6.30690e+01 1.84087e-01 64 2005 7 6.19846e+01 5.26220e-01 104 2005 8 5.86096e+01 7.71207e-01 91 2005 9 5.09801e+01 2.97418e+00 80 2005 10 4.22597e+01 2.66496e+00 292 2005 11 3.44465e+01 1.97852e+00 261 2005 12 2.98491e+01 4.99713e-01 170 2006 1 3.23812e+01 1.91394e+00 194 2006 2 4.01887e+01 2.76084e+00 200 2006 3 4.89263e+01 2.95970e+00 250 2006 4 5.65737e+01 1.96775e+00 191 2006 5 6.18011e+01 9.48457e-01 160 2006 6 6.28363e+01 4.18007e-01 117 2006 7 6.18019e+01 5.97369e-01 96 2006 8 5.83150e+01 1.65491e+00 141 2006 9 5.07723e+01 2.60001e+00 176 2006 10 4.33193e+01 2.93680e+00 177 2006 11 3.41190e+01 1.76739e+00 247 2006 12 2.99590e+01 6.04687e-01 142 2007 1 3.23379e+01 1.71535e+00 98 2007 2 4.06348e+01 2.34606e+00 176 2007 3 4.95039e+01 2.52874e+00 298 2007 4 5.79280e+01 2.07524e+00 160 2007 5 6.17968e+01 9.54676e-01 112 2007 6 6.28637e+01 3.81967e-01 96 2007 7 6.21014e+01 6.56621e-01 145 2007 8 5.71842e+01 1.55489e+00 112 2007 9 4.86990e+01 1.62967e+00 115 2007 10 4.35519e+01 1.80521e+00 149 2007 11 3.47560e+01 1.98405e+00 284 2007 12 3.00215e+01 4.25567e-01 164 2008 1 3.19791e+01 2.05748e+00 204 2008 2 3.95900e+01 2.99814e+00 240 2008 3 5.10018e+01 2.70333e+00 176 2008 4 5.85254e+01 1.16194e+00 176 2008 5 6.18964e+01 9.17229e-01 176 2008 6 6.28984e+01 1.88565e-01 112 2008 7 6.18613e+01 5.84280e-01 80 2008 8 5.75510e+01 1.63898e+00 48 2008 9 5.08915e+01 1.77120e+00 128 2008 10 4.19464e+01 2.59469e+00 272 2008 11 3.44789e+01 1.71448e+00 281 2008 12 2.97526e+01 4.63942e-01 199 2009 1 3.23781e+01 1.79662e+00 155 2009 2 4.00254e+01 2.61635e+00 208 2009 3 4.85232e+01 2.18982e+00 192 2009 4 5.78981e+01 2.12685e+00 160 2009 5 6.15471e+01 9.56600e-01 160 2009 6 6.29049e+01 3.31901e-01 80 2009 7 6.20499e+01 6.09883e-01 56 2009 8 5.71247e+01 1.48780e+00 97 2009 9 4.98844e+01 2.05742e+00 96 2009 10 4.26091e+01 2.66823e+00 238 2009 11 3.40275e+01 1.88027e+00 196 2009 12 2.98499e+01 2.25120e-01 64 2010 1 3.17066e+01 1.64998e+00 161 2010 2 4.05023e+01 2.35038e+00 183 2010 3 4.94253e+01 3.27782e+00 167 2010 4 5.74967e+01 1.82830e+00 223 2010 5 6.20538e+01 5.66233e-01 117 2010 6 6.29251e+01 1.02362e-01 118 2010 7 6.18276e+01 7.77427e-01 73 2010 8 5.81862e+01 1.33344e+00 128 2010 9 5.13864e+01 2.23733e+00 171 2010 10 4.37284e+01 2.29999e+00 304 2010 11 3.42118e+01 1.87262e+00 289 2010 12 3.00119e+01 4.57891e-01 212 2011 1 3.24598e+01 1.58920e+00 214 2011 2 4.13017e+01 1.49222e+00 176 2011 3 4.89421e+01 2.45935e+00 174 2011 4 5.70347e+01 2.08102e+00 144 2011 5 6.17124e+01 8.47290e-01 210 2011 6 6.30155e+01 2.00926e-01 185 2011 7 6.18758e+01 7.91838e-01 127 2011 8 5.78353e+01 1.60449e+00 144 2011 9 5.08755e+01 2.19594e+00 144 2011 10 4.25588e+01 2.86130e+00 288 2011 11 3.47164e+01 1.97996e+00 233 2011 12 2.99290e+01 5.08609e-01 240 2012 1 3.20396e+01 1.98499e+00 196 2012 2 4.05013e+01 1.25929e+00 38 2012 3 4.95928e+01 2.28696e+00 233 2012 4 5.77023e+01 1.78572e+00 208 2012 5 6.17666e+01 7.81295e-01 176 2012 6 6.30660e+01 2.04700e-01 112 2012 7 6.21276e+01 5.85037e-01 64 2012 8 5.70346e+01 1.25163e+00 80 2012 9 5.00804e+01 2.48702e+00 95 2012 10 4.16169e+01 2.21197e+00 217 2012 11 3.43222e+01 2.26053e+00 288 2012 12 3.00681e+01 6.19939e-01 80 2013 1 3.34130e+01 1.38006e+00 149 2013 2 3.98131e+01 2.82212e+00 128 2013 3 4.97029e+01 3.08137e+00 231 2013 4 5.51426e+01 6.57919e-01 48 2013 5 6.20776e+01 6.38015e-01 160 2013 6 6.30305e+01 9.71298e-02 80 2013 7 6.17319e+01 3.74668e-01 60 2013 8 5.78749e+01 1.89973e+00 119 2013 9 5.19675e+01 2.23178e+00 167 2013 10 4.18306e+01 2.17268e+00 240 2013 11 3.36625e+01 2.58595e+00 78 2013 12 2.96898e+01 3.32909e-01 192 2014 1 3.23272e+01 1.18349e+00 128 2014 2 4.09052e+01 1.88273e+00 144 2014 3 4.94852e+01 2.56363e+00 160 2014 4 5.72069e+01 1.94818e+00 128 2014 5 6.19118e+01 6.60213e-01 144 2014 6 6.30099e+01 1.07079e-01 145 2014 7 6.20612e+01 6.98965e-01 96 2014 8 5.71911e+01 1.22331e+00 121 2014 9 5.16732e+01 2.37114e+00 122 2014 10 4.26272e+01 2.41686e+00 285 2014 11 3.43300e+01 2.19871e+00 240 2014 12 2.99701e+01 4.09342e-01 176 2015 1 3.29081e+01 1.77330e+00 202 2015 2 3.93602e+01 1.88682e+00 256 2015 3 4.95790e+01 2.63528e+00 128 2015 4 5.46487e+01 5.52581e-01 48 2015 5 6.15583e+01 7.90857e-01 152 2015 6 6.30615e+01 1.12571e-01 99 2015 7 6.20294e+01 7.08981e-01 75 2015 8 5.73659e+01 1.55108e+00 127 2015 9 5.10595e+01 1.70231e+00 80 2015 10 4.22099e+01 2.25981e+00 192 2015 11 3.36508e+01 1.86856e+00 228 2015 12 3.00536e+01 4.34080e-01 176 2016 1 3.29206e+01 1.51815e+00 139 2016 2 4.04621e+01 2.52541e+00 256 2016 3 4.91107e+01 2.45490e+00 192 2016 4 5.64658e+01 1.68858e+00 95 2016 5 6.16558e+01 7.26229e-01 131 2016 6 6.28729e+01 3.27784e-01 151 2016 7 6.22099e+01 6.33675e-01 171 2016 8 5.70570e+01 9.70891e-01 124 2016 9 5.06265e+01 2.30804e+00 145 2016 10 4.21088e+01 2.82066e+00 304 2016 11 3.45168e+01 1.91935e+00 256 2016 12 2.97322e+01 3.64528e-01 218 2017 1 3.22033e+01 1.61181e+00 184 2017 2 4.02843e+01 2.57148e+00 318 2017 3 5.00373e+01 2.57253e+00 201 2017 4 5.69066e+01 1.48848e+00 144 2017 5 6.17664e+01 7.18032e-01 129 2017 6 6.28892e+01 1.97408e-01 71 2017 7 6.21722e+01 7.91413e-01 112 2017 8 5.82110e+01 1.02830e+00 86 2017 9 5.03038e+01 2.00373e+00 176 2017 10 4.14520e+01 2.60064e+00 199 2017 11 3.42299e+01 2.07353e+00 304 2017 12 2.98682e+01 3.07088e-01 144 2018 1 3.27955e+01 1.71598e+00 165 2018 2 4.13038e+01 2.63944e+00 144 2018 3 4.86329e+01 2.71044e+00 232 2018 4 5.75741e+01 1.83892e+00 160 2018 5 6.14363e+01 8.79290e-01 130 2018 6 6.29347e+01 1.03698e-01 123 2018 7 6.21749e+01 5.52185e-01 124 2018 8 5.77415e+01 1.10783e+00 43 2018 9 5.08397e+01 2.32181e+00 157 2018 10 4.18370e+01 2.55711e+00 240 2018 11 3.38140e+01 2.00592e+00 112 2018 12 2.98198e+01 5.89888e-01 123 2019 1 3.20992e+01 1.57780e+00 208 2019 2 3.79812e+01 6.58869e-01 48 2019 3 4.96180e+01 2.64625e+00 240 2019 4 5.79761e+01 1.68261e+00 128 2019 5 6.18055e+01 8.10499e-01 222 2019 6 6.30046e+01 3.04500e-01 144 2019 7 6.19533e+01 8.65364e-01 113 2019 8 5.77859e+01 1.76331e+00 125 2019 9 5.09756e+01 2.40668e+00 274 2019 10 4.43054e+01 2.40522e+00 134 2019 11 3.37742e+01 2.04890e+00 203 2019 12 2.99891e+01 3.69297e-01 108 2020 1 3.21327e+01 1.71774e+00 160 2020 2 4.06559e+01 3.34495e+00 131 2020 3 4.97338e+01 2.60174e+00 135 2020 4 5.75132e+01 2.12512e+00 153 2020 5 6.15063e+01 6.55050e-01 160 2020 6 6.29970e+01 2.16710e-01 77 2020 7 6.16217e+01 7.32096e-01 96 2020 8 5.99277e+01 5.67874e-01 48 2020 9 5.10123e+01 2.51778e+00 112 2020 10 4.23605e+01 2.51242e+00 192 2020 11 3.43250e+01 1.86251e+00 320 2020 12 2.99094e+01 4.46149e-01 304 2021 1 3.23130e+01 1.79425e+00 144 2021 2 4.03893e+01 3.19621e+00 113 2021 3 4.82880e+01 1.72767e+00 152 2021 4 5.70831e+01 2.08785e+00 160 2021 5 6.20289e+01 6.75918e-01 192 2021 6 6.29877e+01 4.71415e-02 64 2021 7 6.17920e+01 5.11674e-01 87 2021 8 5.84066e+01 9.69610e-01 127 2021 9 5.02783e+01 2.44434e+00 96 2021 10 4.18086e+01 2.16834e+00 146 2021 11 3.40982e+01 1.97928e+00 256 2021 12 2.99166e+01 5.19270e-01 144 2022 1 3.25504e+01 2.05395e+00 208 2022 2 4.14734e+01 1.86702e+00 170 2022 3 4.97492e+01 3.34486e+00 208 2022 4 5.93031e+01 3.31882e-01 64 2022 5 6.12729e+01 1.07200e+00 112 2022 6 6.29813e+01 1.01890e-01 176 2022 7 6.18256e+01 6.51717e-01 72 2022 8 5.70242e+01 1.94811e+00 96 2022 9 5.06431e+01 1.89772e+00 161 2022 10 4.31540e+01 2.42168e+00 312 2022 11 3.47656e+01 1.93051e+00 160 2022 12 2.97868e+01 3.64385e-01 188 2023 1 3.24437e+01 1.65531e+00 235 2023 2 3.99315e+01 3.01178e+00 172 2023 3 4.80961e+01 2.42906e+00 128 2023 4 5.82080e+01 1.39937e+00 112 2023 5 6.13087e+01 6.07778e-01 85 2023 6 6.30232e+01 1.48720e-01 128 2023 7 6.18980e+01 7.81785e-01 72 2023 8 5.72771e+01 1.37627e+00 144 2023 9 5.19221e+01 1.50558e+00 176 2023 10 4.11617e+01 2.14422e+00 208 2023 11 3.57459e+01 1.69666e+00 162 2023 12 2.96088e+01 2.01246e-01 98 2024 1 3.22484e+01 1.95848e+00 111 2024 2 4.15848e+01 1.83387e+00 128 2024 3 5.08787e+01 2.81152e+00 80 2024 4 nan nan 0