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 3.21487e+00 1.16778e-01 17 2002 8 3.38091e+00 5.53055e-01 46 2002 9 3.37170e+00 1.22799e+00 80 2002 10 3.14085e+00 8.50344e-01 106 2002 11 3.79806e+00 8.87166e-01 141 2002 12 3.19000e+00 9.11947e-01 155 2003 1 3.64511e+00 1.04149e+00 186 2003 2 3.09029e+00 4.33091e-01 109 2003 3 5.00822e+00 7.35955e-01 44 2003 4 4.58724e+00 7.28854e-01 126 2003 5 3.84052e+00 1.66454e+00 43 2003 6 3.81682e+00 9.08252e-01 50 2003 7 3.39815e+00 1.44908e-01 48 2003 8 2.19666e+00 2.71403e-01 48 2003 9 3.67346e+00 1.85761e+00 109 2003 10 2.87114e+00 1.21741e+00 191 2003 11 3.47083e+00 1.13998e+00 224 2003 12 3.31994e+00 1.15348e+00 155 2004 1 2.35155e+00 8.56227e-01 145 2004 2 4.63368e+00 1.02802e+00 63 2004 3 3.25797e+00 1.01607e+00 176 2004 4 4.05418e+00 1.31382e+00 122 2004 5 2.95172e+00 7.50503e-01 146 2004 6 4.96346e+00 2.29697e-01 15 2004 7 3.13444e+00 2.47039e-01 64 2004 8 3.22367e+00 1.15063e+00 65 2004 9 4.07744e+00 3.38189e-01 46 2004 10 3.21728e+00 9.89867e-01 70 2004 11 3.88214e+00 1.22094e+00 159 2004 12 4.48424e+00 1.48709e+00 123 2005 1 3.62928e+00 1.25908e+00 198 2005 2 3.70952e+00 7.94769e-01 144 2005 3 4.18283e+00 1.28965e+00 175 2005 4 3.26066e+00 9.65343e-02 16 2005 5 3.39280e+00 1.08283e+00 111 2005 6 3.44553e+00 6.86614e-01 60 2005 7 4.71023e+00 9.81770e-01 96 2005 8 4.10136e+00 2.42945e-01 38 2005 9 2.49525e+00 9.55587e-01 67 2005 10 2.91654e+00 1.34826e+00 240 2005 11 3.00814e+00 1.33850e+00 222 2005 12 2.87418e+00 6.77143e-01 124 2006 1 4.52690e+00 9.14412e-01 102 2006 2 4.45260e+00 1.24169e+00 162 2006 3 3.87102e+00 1.15082e+00 240 2006 4 3.76914e+00 1.18402e+00 151 2006 5 3.72457e+00 1.06399e+00 128 2006 6 2.47523e+00 6.38580e-01 64 2006 7 3.46278e+00 7.87462e-01 48 2006 8 2.95050e+00 6.49697e-01 128 2006 9 2.65676e+00 5.78582e-01 112 2006 10 3.43264e+00 1.15326e+00 180 2006 11 3.12319e+00 1.19898e+00 137 2006 12 3.36836e+00 1.20716e+00 98 2007 1 3.42540e+00 6.30647e-01 65 2007 2 3.40829e+00 8.11517e-01 186 2007 3 2.89133e+00 4.13907e-01 254 2007 4 3.54686e+00 8.52413e-01 147 2007 5 3.70038e+00 1.10590e+00 23 2007 6 3.25025e+00 3.35366e-01 48 2007 7 4.05282e+00 1.12097e+00 112 2007 8 4.24999e+00 1.55648e+00 80 2007 9 6.85489e+00 7.37214e-01 60 2007 10 5.36359e+00 1.74655e+00 128 2007 11 4.02598e+00 1.16841e+00 247 2007 12 3.02734e+00 2.53068e-01 64 2008 1 3.87937e+00 1.18681e+00 110 2008 2 3.78020e+00 1.09620e+00 218 2008 3 4.79366e+00 1.25461e+00 172 2008 4 4.12318e+00 8.96128e-01 112 2008 5 3.52772e+00 1.20242e+00 96 2008 6 2.72634e+00 5.13752e-01 128 2008 7 2.95670e+00 2.55855e-01 53 2008 8 2.42234e+00 7.16508e-02 16 2008 9 3.36071e+00 1.79310e+00 132 2008 10 4.31950e+00 1.55428e+00 256 2008 11 3.04343e+00 8.00914e-01 250 2008 12 4.34731e+00 1.69204e+00 135 2009 1 4.06412e+00 1.45780e+00 148 2009 2 2.85485e+00 8.89307e-01 176 2009 3 3.77426e+00 1.88333e+00 125 2009 4 5.49504e+00 1.14396e+00 48 2009 5 3.32662e+00 6.10832e-01 80 2009 6 2.92851e+00 1.48851e-01 16 2009 7 3.37103e+00 7.34376e-01 37 2009 8 2.62525e+00 4.25609e-01 40 2009 9 3.37742e+00 1.68212e+00 64 2009 10 3.03140e+00 6.74673e-01 181 2009 11 4.08481e+00 1.17004e+00 160 2009 12 5.76232e+00 1.82144e+00 19 2010 1 7.47709e+00 1.26926e+00 25 2010 2 9.28300e+00 1.11554e+00 47 2010 3 5.38799e+00 1.29080e+00 153 2010 4 4.24279e+00 9.36847e-01 144 2010 5 3.60077e+00 6.66979e-01 48 2010 6 2.86772e+00 3.50419e-01 96 2010 7 3.00422e+00 3.93759e-01 64 2010 8 2.49134e+00 3.20706e-01 32 2010 9 3.11868e+00 9.89290e-01 144 2010 10 2.73536e+00 6.97172e-01 304 2010 11 3.29015e+00 9.64444e-01 272 2010 12 3.85323e+00 1.50789e+00 160 2011 1 3.69838e+00 1.02882e+00 168 2011 2 3.26748e+00 6.10420e-01 112 2011 3 3.77682e+00 1.19931e+00 128 2011 4 3.28054e+00 7.33633e-01 144 2011 5 3.30988e+00 3.26548e-01 80 2011 6 4.00153e+00 7.86176e-01 112 2011 7 3.28977e+00 3.75117e-01 80 2011 8 4.14058e+00 4.53221e-01 67 2011 9 3.45041e+00 1.05833e+00 160 2011 10 3.78890e+00 8.72955e-01 239 2011 11 5.32563e+00 1.34492e+00 102 2011 12 4.64789e+00 1.21476e+00 177 2012 1 3.98632e+00 1.01231e+00 159 2012 2 4.99546e+00 7.78048e-01 30 2012 3 3.39552e+00 5.74712e-01 144 2012 4 3.69940e+00 1.45453e+00 208 2012 5 3.26884e+00 1.06668e+00 144 2012 6 3.66742e+00 1.90435e+00 64 2012 7 4.02524e+00 1.00799e+00 80 2012 8 2.82257e+00 1.33533e+00 80 2012 9 3.43091e+00 1.69078e+00 80 2012 10 3.53842e+00 9.45791e-01 189 2012 11 2.51363e+00 8.64271e-01 224 2012 12 2.05825e+00 5.53964e-01 76 2013 1 3.14869e+00 1.52311e+00 110 2013 2 4.05842e+00 1.44088e+00 144 2013 3 4.04576e+00 8.37365e-01 84 2013 4 3.29669e+00 5.94244e-01 78 2013 5 3.81141e+00 7.95096e-01 80 2013 6 3.53960e+00 6.59398e-01 32 2013 7 nan nan 0 2013 8 3.21698e+00 4.16950e-01 74 2013 9 2.97842e+00 8.24946e-01 144 2013 10 3.45019e+00 1.29779e+00 176 2013 11 4.49995e+00 1.91556e+00 83 2013 12 3.00204e+00 1.27454e+00 130 2014 1 5.45445e+00 1.51357e+00 58 2014 2 4.24827e+00 1.04967e+00 144 2014 3 4.08770e+00 6.05833e-01 109 2014 4 3.44631e+00 2.19177e-01 48 2014 5 4.08353e+00 1.33004e+00 118 2014 6 3.37222e+00 8.19266e-01 96 2014 7 2.79286e+00 1.84727e-01 48 2014 8 2.99378e+00 5.94479e-01 84 2014 9 3.80819e+00 9.13841e-01 160 2014 10 3.12486e+00 1.03934e+00 310 2014 11 3.03442e+00 1.16688e+00 152 2014 12 2.01154e+00 6.66362e-01 172 2015 1 3.59023e+00 8.54723e-01 146 2015 2 3.50112e+00 7.32732e-01 141 2015 3 3.47359e+00 6.12018e-01 144 2015 4 3.11783e+00 1.27638e-01 48 2015 5 3.90878e+00 8.29854e-01 144 2015 6 3.62127e+00 9.06334e-01 43 2015 7 4.01308e+00 1.23809e+00 64 2015 8 2.76485e+00 4.02474e-01 98 2015 9 4.73752e+00 1.38660e+00 86 2015 10 3.33876e+00 8.65449e-01 131 2015 11 4.00048e+00 1.30650e+00 188 2015 12 3.47594e+00 1.61295e+00 114 2016 1 7.17166e+00 1.38610e+00 20 2016 2 6.36007e+00 1.44230e+00 127 2016 3 4.05027e+00 1.63470e+00 93 2016 4 4.57864e+00 8.07498e-01 80 2016 5 2.91263e+00 3.07023e-01 112 2016 6 3.03079e+00 3.80900e-01 112 2016 7 3.57650e+00 9.54464e-01 160 2016 8 3.90248e+00 1.82718e+00 123 2016 9 3.49216e+00 1.14253e+00 160 2016 10 4.31997e+00 1.18745e+00 256 2016 11 3.10663e+00 1.37299e+00 176 2016 12 3.15568e+00 9.21101e-01 142 2017 1 5.07999e+00 7.67009e-01 46 2017 2 4.10722e+00 8.53331e-01 195 2017 3 3.80418e+00 1.33599e+00 177 2017 4 3.23335e+00 4.58760e-01 112 2017 5 4.11339e+00 9.14047e-01 96 2017 6 2.83225e+00 1.52213e-01 48 2017 7 3.58445e+00 1.64548e+00 64 2017 8 3.19286e+00 3.02785e-01 36 2017 9 2.95070e+00 5.40514e-01 128 2017 10 4.68515e+00 1.92497e+00 175 2017 11 2.95375e+00 1.11982e+00 252 2017 12 3.29433e+00 1.08154e+00 107 2018 1 3.92756e+00 1.11157e+00 176 2018 2 3.06921e+00 4.06086e-01 96 2018 3 2.82555e+00 7.86454e-01 192 2018 4 2.73254e+00 4.71552e-01 144 2018 5 3.70976e+00 6.87471e-01 82 2018 6 3.31131e+00 3.32795e-01 62 2018 7 2.89547e+00 6.05348e-01 66 2018 8 2.88930e+00 3.14794e-01 62 2018 9 1.94279e+00 4.41921e-01 128 2018 10 3.09320e+00 1.60526e+00 242 2018 11 2.74550e+00 7.29993e-01 111 2018 12 3.86143e+00 6.72047e-01 36 2019 1 5.83652e+00 1.29372e+00 55 2019 2 5.01795e+00 1.06784e+00 62 2019 3 3.47331e+00 7.48138e-01 209 2019 4 4.15509e+00 1.09374e+00 112 2019 5 2.85402e+00 6.93705e-01 129 2019 6 3.42646e+00 6.46923e-01 88 2019 7 3.08834e+00 3.09234e-01 64 2019 8 2.52764e+00 5.12665e-01 134 2019 9 3.56361e+00 1.29227e+00 240 2019 10 4.44498e+00 9.65019e-01 128 2019 11 3.48188e+00 1.39758e+00 176 2019 12 4.18515e+00 9.44889e-01 64 2020 1 3.65986e+00 6.44254e-01 104 2020 2 5.08994e+00 2.01148e+00 80 2020 3 5.49501e+00 1.90452e+00 77 2020 4 4.22321e+00 1.06659e+00 96 2020 5 4.37384e+00 1.24763e+00 96 2020 6 3.18619e+00 9.58010e-01 80 2020 7 2.99214e+00 2.01886e-01 46 2020 8 3.66483e+00 4.53874e-01 48 2020 9 3.64410e+00 1.10984e+00 64 2020 10 3.16311e+00 7.87087e-01 160 2020 11 3.76091e+00 1.32267e+00 179 2020 12 3.46158e+00 1.20175e+00 243 2021 1 3.67913e+00 7.08431e-01 87 2021 2 3.97589e+00 7.11018e-01 48 2021 3 4.78371e+00 7.37748e-01 111 2021 4 3.60102e+00 6.29803e-01 145 2021 5 4.35544e+00 1.50471e+00 92 2021 6 3.28814e+00 3.32024e-01 32 2021 7 3.07563e+00 8.19718e-01 80 2021 8 3.11075e+00 1.21167e+00 144 2021 9 2.31292e+00 6.27703e-01 96 2021 10 2.66872e+00 3.75833e-01 112 2021 11 2.66461e+00 9.68704e-01 207 2021 12 2.29296e+00 4.42854e-01 144 2022 1 3.18938e+00 9.89980e-01 159 2022 2 4.10428e+00 1.01814e+00 116 2022 3 4.00440e+00 1.35852e+00 194 2022 4 4.07073e+00 8.73841e-01 35 2022 5 3.06595e+00 6.59767e-01 52 2022 6 2.62530e+00 3.69893e-01 168 2022 7 2.41200e+00 3.78016e-01 108 2022 8 2.34609e+00 3.87244e-01 68 2022 9 2.92969e+00 1.82151e+00 115 2022 10 2.90728e+00 9.77810e-01 301 2022 11 3.67137e+00 9.18487e-01 99 2022 12 2.77284e+00 5.01226e-01 144 2023 1 2.83512e+00 6.81870e-01 167 2023 2 4.86012e+00 1.26194e+00 110 2023 3 3.33985e+00 5.75655e-01 94 2023 4 3.41866e+00 8.82471e-01 80 2023 5 3.05875e+00 1.00566e+00 65 2023 6 4.22924e+00 7.52161e-01 79 2023 7 3.05981e+00 1.11145e+00 54 2023 8 3.37801e+00 7.19661e-01 64 2023 9 3.28443e+00 1.37512e+00 165 2023 10 3.56097e+00 1.25272e+00 197 2023 11 3.23646e+00 1.16294e+00 115 2023 12 2.47152e+00 3.34438e-01 74 2024 1 3.71034e+00 1.19897e+00 69 2024 2 4.73685e+00 2.68043e+00 80 2024 3 4.66228e+00 4.91923e-01 59 2024 4 nan nan 0