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 6.21078e+01 5.95894e-01 145 2002 8 5.68802e+01 1.32571e+00 122 2002 9 4.94055e+01 2.17833e+00 59 2002 10 4.24455e+01 2.42485e+00 125 2002 11 3.25983e+01 1.51845e+00 179 2002 12 2.94680e+01 5.48833e-01 128 2003 1 3.12106e+01 1.58266e+00 208 2003 2 3.83407e+01 2.26375e+00 168 2003 3 5.03228e+01 2.22070e+00 152 2003 4 5.79773e+01 1.91869e+00 128 2003 5 6.34866e+01 3.35610e-02 16 2003 6 6.33848e+01 2.51286e-02 16 2003 7 6.25286e+01 3.21482e-01 64 2003 8 5.78528e+01 1.21737e+00 76 2003 9 5.12033e+01 2.20868e+00 120 2003 10 4.18819e+01 2.59870e+00 224 2003 11 3.39756e+01 2.07512e+00 256 2003 12 2.92985e+01 4.02292e-01 207 2004 1 3.20907e+01 1.56163e+00 112 2004 2 4.07448e+01 2.16266e+00 80 2004 3 4.95705e+01 2.52512e+00 225 2004 4 5.67507e+01 2.05940e+00 174 2004 5 6.16001e+01 8.02576e-01 113 2004 6 6.31847e+01 1.15160e-01 58 2004 7 6.21451e+01 7.18779e-01 96 2004 8 5.80722e+01 1.62173e+00 144 2004 9 5.06819e+01 2.27203e+00 160 2004 10 4.37146e+01 2.51767e+00 112 2004 11 3.45135e+01 2.09694e+00 84 2004 12 2.90409e+01 1.57927e-01 149 2005 1 3.22817e+01 1.39514e+00 133 2005 2 3.95857e+01 1.97462e+00 96 2005 3 4.76107e+01 2.18884e+00 128 2005 4 5.72988e+01 1.65061e+00 120 2005 5 6.18245e+01 7.52870e-01 112 2005 6 6.33114e+01 1.58800e-01 192 2005 7 6.19263e+01 6.23017e-01 162 2005 8 5.67364e+01 1.46980e+00 80 2005 9 5.14158e+01 2.29111e+00 192 2005 10 4.10082e+01 2.15928e+00 289 2005 11 3.30225e+01 2.17080e+00 192 2005 12 2.92385e+01 5.20370e-01 140 2006 1 3.17021e+01 2.00262e+00 133 2006 2 3.97497e+01 2.90717e+00 160 2006 3 4.93244e+01 3.06229e+00 208 2006 4 5.71646e+01 1.75013e+00 197 2006 5 6.21080e+01 8.24133e-01 192 2006 6 6.31917e+01 2.00361e-01 180 2006 7 6.18212e+01 4.56170e-01 50 2006 8 5.74406e+01 1.84640e+00 129 2006 9 5.02091e+01 2.59734e+00 164 2006 10 4.29841e+01 2.86452e+00 224 2006 11 3.35475e+01 2.08010e+00 271 2006 12 2.95718e+01 5.79084e-01 192 2007 1 3.15572e+01 1.78212e+00 96 2007 2 3.91534e+01 2.03647e+00 120 2007 3 4.82997e+01 2.81220e+00 208 2007 4 5.78056e+01 1.89729e+00 176 2007 5 6.12607e+01 8.14259e-01 80 2007 6 6.31994e+01 1.77466e-01 125 2007 7 6.25345e+01 3.62185e-01 80 2007 8 5.80224e+01 1.50486e+00 46 2007 9 5.02561e+01 1.97764e+00 128 2007 10 4.18715e+01 3.15323e+00 192 2007 11 3.47822e+01 1.84056e+00 208 2007 12 2.93560e+01 3.12960e-01 145 2008 1 3.14543e+01 2.12831e+00 139 2008 2 3.95313e+01 2.89461e+00 251 2008 3 4.96394e+01 2.93733e+00 192 2008 4 5.86173e+01 1.10056e+00 144 2008 5 6.18501e+01 9.72257e-01 96 2008 6 6.32898e+01 1.93128e-01 165 2008 7 6.23081e+01 3.30006e-01 85 2008 8 5.71333e+01 1.60699e+00 144 2008 9 5.06600e+01 2.52020e+00 164 2008 10 4.11087e+01 2.99366e+00 195 2008 11 3.39792e+01 1.85006e+00 268 2008 12 2.94082e+01 5.26773e-01 144 2009 1 3.13780e+01 1.66985e+00 176 2009 2 3.91298e+01 2.80307e+00 142 2009 3 4.92039e+01 2.78536e+00 132 2009 4 5.70457e+01 1.74738e+00 98 2009 5 6.20706e+01 7.73446e-01 92 2009 6 6.32700e+01 9.88514e-02 159 2009 7 6.21706e+01 4.65209e-01 87 2009 8 5.76287e+01 1.66198e+00 112 2009 9 4.97372e+01 2.44859e+00 136 2009 10 4.23467e+01 1.78741e+00 112 2009 11 3.42493e+01 1.95274e+00 144 2009 12 2.92942e+01 4.35297e-01 110 2010 1 3.12062e+01 1.57873e+00 175 2010 2 4.05014e+01 2.14496e+00 176 2010 3 4.87580e+01 3.07044e+00 176 2010 4 5.71912e+01 2.04639e+00 160 2010 5 6.21647e+01 8.73062e-01 169 2010 6 6.30870e+01 1.15680e-01 180 2010 7 6.20012e+01 9.36816e-01 153 2010 8 5.81493e+01 1.54177e+00 96 2010 9 5.10375e+01 2.50057e+00 215 2010 10 4.27287e+01 2.63430e+00 320 2010 11 3.43414e+01 1.84951e+00 208 2010 12 2.95388e+01 5.03165e-01 205 2011 1 3.12617e+01 1.61871e+00 208 2011 2 4.07101e+01 1.72622e+00 192 2011 3 4.87879e+01 2.19943e+00 192 2011 4 5.72494e+01 2.01739e+00 111 2011 5 6.18236e+01 8.39477e-01 208 2011 6 6.32356e+01 1.60496e-01 138 2011 7 6.16888e+01 7.33151e-01 128 2011 8 5.69778e+01 1.44199e+00 130 2011 9 5.12678e+01 2.33747e+00 209 2011 10 4.25063e+01 2.88061e+00 320 2011 11 3.32367e+01 2.29314e+00 128 2011 12 2.93504e+01 6.45636e-01 65 2012 1 3.13400e+01 1.72174e+00 192 2012 2 3.86325e+01 2.49877e-01 48 2012 3 4.93176e+01 2.98402e+00 220 2012 4 5.72038e+01 2.02058e+00 208 2012 5 6.22312e+01 7.90193e-01 176 2012 6 6.32787e+01 1.37083e-01 154 2012 7 6.17216e+01 6.76621e-01 78 2012 8 5.80835e+01 1.22478e+00 112 2012 9 5.10348e+01 2.06304e+00 171 2012 10 4.17313e+01 2.65479e+00 288 2012 11 3.40649e+01 2.07898e+00 272 2012 12 2.94018e+01 4.27367e-01 143 2013 1 3.30756e+01 1.60317e+00 128 2013 2 3.85870e+01 2.31026e+00 80 2013 3 5.00995e+01 2.96868e+00 208 2013 4 5.78139e+01 1.72650e+00 107 2013 5 6.19401e+01 8.39723e-01 127 2013 6 6.31372e+01 1.76749e-01 80 2013 7 6.21150e+01 7.52731e-01 160 2013 8 5.70597e+01 1.46794e+00 89 2013 9 5.14880e+01 2.41598e+00 188 2013 10 4.22505e+01 2.39236e+00 176 2013 11 3.40024e+01 2.43740e+00 176 2013 12 2.92573e+01 4.29189e-01 112 2014 1 3.13003e+01 1.01202e+00 144 2014 2 3.99622e+01 2.10274e+00 160 2014 3 4.97641e+01 2.81386e+00 144 2014 4 5.69394e+01 1.63707e+00 112 2014 5 6.19713e+01 8.06534e-01 156 2014 6 6.32081e+01 1.53302e-01 128 2014 7 6.23219e+01 8.08992e-01 82 2014 8 5.75938e+01 1.29286e+00 160 2014 9 5.11748e+01 1.73638e+00 112 2014 10 4.14061e+01 2.68828e+00 311 2014 11 3.36391e+01 2.30139e+00 229 2014 12 2.94496e+01 4.31462e-01 176 2015 1 3.27265e+01 1.67397e+00 160 2015 2 3.84332e+01 1.66500e+00 208 2015 3 4.91559e+01 2.36864e+00 128 2015 4 5.61663e+01 2.16319e+00 64 2015 5 6.15250e+01 9.71698e-01 192 2015 6 6.31370e+01 1.45119e-01 160 2015 7 6.17624e+01 5.56307e-01 107 2015 8 5.71982e+01 1.69926e+00 194 2015 9 5.08578e+01 2.43773e+00 157 2015 10 4.26060e+01 1.52049e+00 167 2015 11 3.28267e+01 2.06887e+00 173 2015 12 2.94180e+01 3.83457e-01 115 2016 1 3.17389e+01 1.47668e+00 128 2016 2 3.94954e+01 2.72582e+00 269 2016 3 4.84049e+01 2.80519e+00 144 2016 4 5.67653e+01 1.79945e+00 144 2016 5 6.22762e+01 7.78170e-01 192 2016 6 6.32348e+01 6.83994e-02 74 2016 7 6.24775e+01 5.47152e-01 105 2016 8 5.76971e+01 1.40719e+00 182 2016 9 4.99454e+01 2.29563e+00 221 2016 10 4.19509e+01 2.82875e+00 289 2016 11 3.33338e+01 1.84585e+00 214 2016 12 2.93358e+01 4.99014e-01 176 2017 1 3.25918e+01 1.94154e+00 144 2017 2 3.98182e+01 2.41523e+00 256 2017 3 5.03439e+01 2.52436e+00 176 2017 4 5.66614e+01 1.63832e+00 160 2017 5 6.19693e+01 8.65259e-01 174 2017 6 6.31814e+01 1.10122e-01 96 2017 7 6.17838e+01 7.17624e-01 137 2017 8 5.82200e+01 7.86629e-01 96 2017 9 4.98294e+01 2.20954e+00 208 2017 10 4.10500e+01 2.57489e+00 224 2017 11 3.34484e+01 1.96030e+00 240 2017 12 2.92613e+01 3.25008e-01 137 2018 1 3.18013e+01 1.77723e+00 215 2018 2 4.00426e+01 2.48626e+00 115 2018 3 4.85045e+01 2.91082e+00 230 2018 4 5.72420e+01 1.98045e+00 257 2018 5 6.16588e+01 7.77482e-01 192 2018 6 6.30611e+01 9.00520e-02 112 2018 7 6.19558e+01 7.14811e-01 112 2018 8 5.73236e+01 1.59613e+00 119 2018 9 5.18138e+01 1.94458e+00 175 2018 10 4.21242e+01 2.56315e+00 256 2018 11 3.37867e+01 1.87740e+00 80 2018 12 2.93344e+01 4.29341e-01 106 2019 1 3.13225e+01 1.70420e+00 160 2019 2 3.98107e+01 2.37184e+00 52 2019 3 5.08655e+01 2.43011e+00 192 2019 4 5.84246e+01 1.28098e+00 146 2019 5 6.17838e+01 9.50453e-01 207 2019 6 6.32441e+01 1.71171e-01 127 2019 7 6.22518e+01 6.74943e-01 122 2019 8 5.78770e+01 1.62518e+00 122 2019 9 5.08090e+01 2.60038e+00 282 2019 10 4.34422e+01 2.45143e+00 160 2019 11 3.35251e+01 2.22324e+00 172 2019 12 2.95429e+01 5.13422e-01 176 2020 1 3.16661e+01 1.78204e+00 112 2020 2 3.93330e+01 3.23242e+00 160 2020 3 4.92215e+01 2.37639e+00 96 2020 4 5.72665e+01 2.23660e+00 128 2020 5 6.14591e+01 8.35936e-01 128 2020 6 6.33936e+01 1.14976e-01 112 2020 7 6.19977e+01 6.31530e-01 95 2020 8 5.92754e+01 7.03487e-01 81 2020 9 5.10124e+01 3.01112e+00 112 2020 10 4.18926e+01 2.21114e+00 160 2020 11 3.40710e+01 1.71066e+00 224 2020 12 2.93839e+01 4.33084e-01 224 2021 1 3.15246e+01 1.82270e+00 144 2021 2 4.00382e+01 2.93537e+00 96 2021 3 4.73380e+01 1.69480e+00 112 2021 4 5.66490e+01 2.28702e+00 176 2021 5 6.17454e+01 9.56125e-01 143 2021 6 6.31981e+01 9.52178e-02 80 2021 7 6.14056e+01 5.42356e-01 106 2021 8 5.84541e+01 1.16880e+00 96 2021 9 5.12488e+01 2.58245e+00 128 2021 10 4.13251e+01 2.38916e+00 144 2021 11 3.35282e+01 1.99130e+00 250 2021 12 2.93060e+01 5.70066e-01 93 2022 1 3.21743e+01 1.85752e+00 192 2022 2 3.97733e+01 2.54983e+00 178 2022 3 4.89026e+01 3.10153e+00 144 2022 4 5.88001e+01 6.80975e-01 64 2022 5 6.13658e+01 7.95242e-01 126 2022 6 6.32547e+01 1.32856e-01 160 2022 7 6.20043e+01 7.55708e-01 104 2022 8 5.67511e+01 1.77544e+00 127 2022 9 5.03535e+01 2.14837e+00 240 2022 10 4.30236e+01 2.31863e+00 289 2022 11 3.42078e+01 1.86488e+00 192 2022 12 2.91867e+01 4.83723e-01 124 2023 1 3.14169e+01 1.85441e+00 170 2023 2 3.84587e+01 2.39556e+00 193 2023 3 4.84219e+01 2.00471e+00 95 2023 4 5.82894e+01 3.63711e-01 32 2023 5 6.19668e+01 9.23464e-01 176 2023 6 6.31947e+01 1.57257e-01 80 2023 7 6.17027e+01 7.15750e-01 160 2023 8 5.79857e+01 1.69828e+00 192 2023 9 5.22362e+01 1.82749e+00 139 2023 10 4.10127e+01 3.02029e+00 197 2023 11 3.40036e+01 2.26348e+00 176 2023 12 2.91432e+01 3.05116e-01 144 2024 1 3.16465e+01 1.60460e+00 80 2024 2 4.05832e+01 2.37182e+00 109 2024 3 5.10047e+01 1.89350e+00 64 2024 4 5.47025e+01 3.60074e-01 32