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 1.56781e+01 8.40419e+00 176 2002 8 1.95682e+01 1.74460e+00 112 2002 9 9.30703e+00 9.10356e+00 79 2002 10 6.66924e+00 3.56193e+00 96 2002 11 4.89315e+00 2.06680e+00 165 2002 12 1.47776e+00 1.60630e+00 176 2003 1 1.08844e+00 1.71331e+00 256 2003 2 5.99925e+00 2.59072e+00 224 2003 3 4.65014e+00 3.04513e+00 144 2003 4 2.26206e+00 2.10175e+00 144 2003 5 1.53080e+00 5.56075e-01 32 2003 6 nan nan 0 2003 7 1.42314e+00 1.18649e+00 64 2003 8 3.53860e+00 3.31350e+00 90 2003 9 1.23678e+01 5.34326e+00 133 2003 10 1.41024e+01 3.95504e+00 208 2003 11 1.26513e+01 3.87191e+00 270 2003 12 4.95686e+00 2.52126e+00 208 2004 1 1.17110e+01 2.55785e+00 144 2004 2 8.91651e+00 2.82462e+00 80 2004 3 9.98000e+00 2.54461e+00 160 2004 4 9.58028e+00 4.83790e+00 164 2004 5 1.80119e+01 7.98521e+00 124 2004 6 5.22981e+00 2.97488e+00 96 2004 7 3.76766e+00 4.00260e+00 80 2004 8 8.52045e+00 4.88336e+00 124 2004 9 6.28132e+00 6.63739e+00 176 2004 10 8.07110e+00 5.24365e+00 135 2004 11 5.70901e+00 1.71561e+00 94 2004 12 1.70655e+00 7.87096e-01 160 2005 1 6.02901e+00 2.97190e+00 128 2005 2 7.08925e+00 1.91836e+00 64 2005 3 5.78596e+00 4.13767e+00 150 2005 4 3.03185e+00 2.43860e+00 128 2005 5 7.74115e+00 5.90854e+00 147 2005 6 1.11288e+01 5.83900e+00 164 2005 7 6.69331e+00 5.23872e+00 96 2005 8 1.52930e+01 9.12962e+00 64 2005 9 5.79223e+00 3.21225e+00 192 2005 10 5.72190e+00 3.58450e+00 304 2005 11 1.17545e+01 4.92136e+00 189 2005 12 1.09800e+01 3.27908e+00 131 2006 1 6.28608e+00 3.06317e+00 128 2006 2 3.00266e+00 2.14716e+00 176 2006 3 1.30242e+01 4.53819e+00 254 2006 4 1.02555e+01 7.80418e+00 145 2006 5 7.05288e+00 3.68254e+00 208 2006 6 8.20495e+00 4.98751e+00 177 2006 7 2.70736e+01 1.85195e+00 64 2006 8 1.63657e+01 4.97296e+00 176 2006 9 1.91447e+01 5.02181e+00 165 2006 10 9.00268e+00 4.45638e+00 208 2006 11 9.01926e+00 3.71670e+00 221 2006 12 1.31994e+01 6.34725e+00 176 2007 1 9.93253e+00 2.66367e+00 73 2007 2 1.32075e+01 4.11928e+00 128 2007 3 1.59156e+01 3.48829e+00 219 2007 4 1.30214e+01 3.77859e+00 144 2007 5 2.29081e+01 6.10132e+00 61 2007 6 1.22347e+01 3.56185e+00 94 2007 7 1.24464e+01 8.25291e+00 96 2007 8 2.17436e+01 2.44575e+00 80 2007 9 1.61102e+01 4.56941e+00 128 2007 10 5.84772e+00 4.44438e+00 171 2007 11 1.47207e+01 2.90882e+00 224 2007 12 1.54262e+01 3.05027e+00 144 2008 1 8.31738e+00 2.50195e+00 128 2008 2 1.11497e+01 5.64964e+00 264 2008 3 1.62440e+00 1.98076e+00 144 2008 4 3.67492e+00 3.16664e+00 126 2008 5 2.71234e+00 2.74923e+00 90 2008 6 1.96234e+00 2.45429e+00 189 2008 7 6.68066e+00 2.07605e+00 87 2008 8 3.76240e+00 2.56978e+00 116 2008 9 1.17235e+01 4.47547e+00 128 2008 10 1.37522e+01 2.83196e+00 179 2008 11 1.83007e+01 3.67178e+00 272 2008 12 1.24950e+01 6.05809e+00 163 2009 1 7.17081e+00 4.59420e+00 191 2009 2 3.46993e+00 1.70082e+00 154 2009 3 6.89004e+00 4.63188e+00 111 2009 4 2.82695e-02 5.96662e-02 96 2009 5 6.03442e+00 2.74554e+00 48 2009 6 2.10672e+00 2.04175e+00 123 2009 7 1.07202e+01 3.13767e+00 48 2009 8 1.49326e+01 3.11626e+00 131 2009 9 1.89887e+01 3.86214e+00 119 2009 10 1.09988e+01 4.49074e+00 146 2009 11 6.41648e+00 3.77900e+00 176 2009 12 2.41633e+00 1.97088e+00 82 2010 1 1.49225e+00 2.27269e+00 174 2010 2 1.68292e-01 3.50249e-01 176 2010 3 1.30978e+00 1.89890e+00 154 2010 4 2.77707e+00 1.72761e+00 160 2010 5 4.46675e+00 3.64695e+00 115 2010 6 2.02787e+00 1.80990e+00 138 2010 7 9.45843e+00 5.17689e+00 80 2010 8 8.72445e+00 2.42162e+00 96 2010 9 9.79939e+00 5.08141e+00 176 2010 10 1.29563e+01 3.94233e+00 330 2010 11 7.24836e+00 2.76255e+00 200 2010 12 2.86019e+00 1.31477e+00 224 2011 1 2.61238e+00 2.45991e+00 190 2011 2 3.09405e+00 3.11539e+00 192 2011 3 6.23024e+00 4.28142e+00 173 2011 4 1.89187e+00 1.41833e+00 122 2011 5 3.83595e+00 2.61635e+00 133 2011 6 1.81181e+00 1.70759e+00 168 2011 7 6.11035e+00 2.86548e+00 124 2011 8 3.32432e+00 2.25385e+00 160 2011 9 6.11120e+00 4.40140e+00 192 2011 10 7.71990e+00 2.76005e+00 296 2011 11 1.06689e+01 2.49773e+00 125 2011 12 9.79827e+00 6.02727e-01 84 2012 1 6.32521e+00 3.17679e+00 204 2012 2 5.76435e+00 2.49836e+00 32 2012 3 1.44249e+01 7.85465e+00 192 2012 4 1.42998e+01 8.21587e+00 148 2012 5 1.40090e+01 3.80725e+00 142 2012 6 1.64220e+01 7.74726e+00 150 2012 7 1.80934e+01 4.11445e+00 79 2012 8 1.38678e+01 4.27594e+00 79 2012 9 1.18924e+01 6.37038e+00 160 2012 10 1.12081e+01 3.87181e+00 304 2012 11 7.75689e+00 3.09035e+00 272 2012 12 1.36858e+01 1.93419e+00 144 2013 1 1.47212e+01 2.29324e+00 144 2013 2 9.59311e+00 4.42682e+00 116 2013 3 6.61563e-01 7.94863e-01 239 2013 4 9.90520e+00 6.40128e+00 84 2013 5 9.01198e+00 4.65759e+00 121 2013 6 1.07865e+01 1.01087e+01 80 2013 7 7.69243e+00 5.04481e+00 144 2013 8 1.66304e+00 1.85415e+00 80 2013 9 8.39102e+00 5.96925e+00 192 2013 10 1.13865e+01 3.15401e+00 160 2013 11 1.15145e+01 5.32635e+00 158 2013 12 1.40139e+01 3.84544e+00 112 2014 1 7.96351e+00 6.38901e+00 160 2014 2 7.92727e+00 2.46595e+00 144 2014 3 9.09155e+00 3.31325e+00 144 2014 4 4.58876e+00 3.81043e+00 80 2014 5 1.20852e+00 1.39906e+00 157 2014 6 5.62512e-01 6.03971e-01 51 2014 7 6.71902e+00 2.97119e+00 114 2014 8 1.00557e+01 7.65688e+00 144 2014 9 2.01837e+01 1.44784e+00 112 2014 10 1.13754e+01 2.87371e+00 293 2014 11 1.01648e+01 2.96383e+00 213 2014 12 1.14216e+01 2.73932e+00 160 2015 1 1.00627e+01 5.50745e+00 176 2015 2 1.19340e+01 4.08070e+00 192 2015 3 1.45703e+01 3.70812e+00 116 2015 4 1.04147e+01 3.79526e+00 67 2015 5 1.53453e+01 6.19042e+00 133 2015 6 1.59612e+01 6.66411e+00 160 2015 7 3.86196e+00 2.73377e+00 69 2015 8 1.05983e+01 5.69764e+00 192 2015 9 2.00652e+01 1.89561e+00 144 2015 10 1.14996e+01 2.18213e+00 176 2015 11 3.81335e+00 3.96629e+00 124 2015 12 1.06567e+01 3.65374e+00 112 2016 1 4.89305e+00 3.34649e+00 140 2016 2 1.01058e+00 1.29224e+00 256 2016 3 1.30559e+00 7.94856e-01 96 2016 4 2.15334e+00 2.21651e+00 174 2016 5 4.82022e+00 4.49318e+00 192 2016 6 2.61155e+00 4.88529e+00 100 2016 7 1.08965e+00 9.20136e-01 100 2016 8 1.12715e+01 3.36920e+00 129 2016 9 1.33865e+01 3.19167e+00 144 2016 10 1.41389e+01 3.79709e+00 288 2016 11 1.14870e+01 2.77469e+00 236 2016 12 1.07296e+01 5.23768e+00 171 2017 1 4.16165e+00 3.28577e+00 200 2017 2 3.71810e+00 2.51822e+00 192 2017 3 6.40040e+00 2.99501e+00 159 2017 4 7.66101e+00 3.01487e+00 104 2017 5 3.02829e+00 3.91931e+00 176 2017 6 7.55366e+00 2.23098e+00 96 2017 7 1.23333e+00 1.54589e+00 107 2017 8 8.58756e-01 2.05456e+00 112 2017 9 8.12073e+00 5.44613e+00 208 2017 10 6.06969e+00 2.21385e+00 177 2017 11 1.26793e+01 3.45539e+00 208 2017 12 1.30766e+01 3.68646e+00 138 2018 1 9.21195e+00 3.17166e+00 224 2018 2 2.02170e+01 7.82969e+00 75 2018 3 1.40952e+01 8.79054e+00 192 2018 4 9.30583e+00 6.10409e+00 208 2018 5 2.88711e+00 2.78827e+00 160 2018 6 5.60359e+00 5.25906e+00 120 2018 7 9.18659e+00 3.38067e+00 112 2018 8 8.69231e+00 2.58426e+00 112 2018 9 1.20772e+01 4.55251e+00 144 2018 10 1.07203e+01 7.79884e+00 188 2018 11 4.46027e+00 3.13083e+00 108 2018 12 1.09636e+00 7.21626e-01 128 2019 1 1.13543e-01 9.45215e-02 162 2019 2 3.18293e+00 1.88582e+00 38 2019 3 6.90496e+00 2.99176e+00 192 2019 4 7.83445e+00 2.86695e+00 112 2019 5 2.38767e+00 2.57971e+00 128 2019 6 6.71205e-01 8.71689e-01 96 2019 7 2.51364e+00 3.85163e+00 112 2019 8 4.03408e+00 4.63923e+00 80 2019 9 6.25037e+00 3.76335e+00 256 2019 10 1.02367e+01 2.88721e+00 129 2019 11 1.22650e+01 4.36787e+00 144 2019 12 1.15653e+01 2.55775e+00 176 2020 1 1.15261e+01 2.07044e+00 128 2020 2 9.74404e+00 8.39933e+00 117 2020 3 1.13165e+00 1.20551e+00 69 2020 4 7.11516e-01 1.06429e+00 128 2020 5 1.03388e+00 1.08879e+00 112 2020 6 1.24965e+01 4.24207e+00 96 2020 7 5.01228e+00 3.92086e+00 59 2020 8 1.44271e+00 1.05319e+00 97 2020 9 4.40391e+00 5.65889e+00 112 2020 10 7.86038e+00 7.28940e+00 165 2020 11 9.41950e+00 5.69995e+00 208 2020 12 1.59049e+01 3.74135e+00 208 2021 1 6.44734e+00 4.21243e+00 176 2021 2 7.45452e+00 6.11266e+00 125 2021 3 1.56606e+01 3.76762e+00 96 2021 4 1.75696e+01 4.85648e+00 144 2021 5 7.48144e+00 4.45982e+00 96 2021 6 1.14064e+01 4.02809e+00 35 2021 7 9.38339e-01 1.43534e+00 128 2021 8 4.76075e+00 5.42387e+00 96 2021 9 2.69888e+00 2.56432e+00 113 2021 10 6.05624e+00 3.92357e+00 144 2021 11 5.95077e+00 3.41354e+00 208 2021 12 8.59908e+00 2.35260e+00 128 2022 1 4.46956e+00 3.27517e+00 176 2022 2 5.85674e+00 4.33099e+00 176 2022 3 8.84039e+00 5.67535e+00 183 2022 4 1.08362e+01 6.33448e+00 80 2022 5 1.29789e+01 3.78705e+00 120 2022 6 6.19408e+00 5.96921e+00 144 2022 7 1.23596e+01 9.04213e+00 146 2022 8 4.99614e+00 2.72478e+00 128 2022 9 9.37063e+00 2.57362e+00 256 2022 10 1.32666e+01 3.51628e+00 262 2022 11 1.05853e+01 2.78117e+00 176 2022 12 1.22570e+01 4.02710e+00 115 2023 1 1.13098e+01 6.78103e+00 205 2023 2 6.28043e+00 2.43014e+00 144 2023 3 4.30042e+00 4.57316e+00 86 2023 4 1.30935e+01 8.64995e+00 63 2023 5 1.95414e+01 9.27253e+00 160 2023 6 1.61908e+01 8.91083e+00 139 2023 7 5.82845e+00 4.64335e+00 152 2023 8 7.83471e+00 4.67825e+00 184 2023 9 5.27698e+00 3.32732e+00 208 2023 10 8.33046e+00 2.46284e+00 177 2023 11 6.47661e+00 2.52423e+00 169 2023 12 1.11605e+01 3.30472e+00 144 2024 1 8.66041e+00 3.83052e+00 96 2024 2 7.02803e+00 2.29192e+00 117 2024 3 8.04427e+00 2.90471e+00 86 2024 4 6.27440e+00 2.05517e+00 32