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 6.20154e+01 6.41869e-01 172 2002 8 5.66212e+01 1.29421e+00 106 2002 9 4.94467e+01 1.98168e+00 96 2002 10 4.21499e+01 2.81357e+00 160 2002 11 3.27876e+01 1.65045e+00 200 2002 12 2.92244e+01 4.34314e-01 128 2003 1 3.10570e+01 1.46577e+00 248 2003 2 3.82940e+01 2.15679e+00 176 2003 3 5.02857e+01 1.87691e+00 144 2003 4 5.79099e+01 1.86284e+00 144 2003 5 6.32016e+01 2.40410e-01 29 2003 6 6.33774e+01 8.91205e-02 30 2003 7 6.16918e+01 7.86361e-01 48 2003 8 5.68708e+01 1.52365e+00 105 2003 9 5.07351e+01 2.30993e+00 144 2003 10 4.22452e+01 2.51263e+00 208 2003 11 3.39739e+01 2.11888e+00 288 2003 12 2.92340e+01 4.09173e-01 208 2004 1 3.18504e+01 1.65864e+00 126 2004 2 4.08013e+01 2.23636e+00 84 2004 3 4.97497e+01 2.04994e+00 224 2004 4 5.65734e+01 1.93047e+00 144 2004 5 6.17314e+01 9.06964e-01 128 2004 6 6.32755e+01 8.92024e-02 64 2004 7 6.24236e+01 1.80858e-01 64 2004 8 5.79048e+01 1.55944e+00 139 2004 9 5.08228e+01 2.31547e+00 176 2004 10 4.23704e+01 3.03235e+00 112 2004 11 3.46134e+01 1.74712e+00 129 2004 12 2.89965e+01 1.62480e-01 158 2005 1 3.23551e+01 1.24732e+00 144 2005 2 3.92018e+01 1.99153e+00 80 2005 3 4.75655e+01 2.75651e+00 144 2005 4 5.67545e+01 1.63205e+00 134 2005 5 6.17456e+01 6.98147e-01 128 2005 6 6.33721e+01 1.69917e-01 191 2005 7 6.20909e+01 5.64605e-01 150 2005 8 5.70509e+01 1.73170e+00 80 2005 9 5.12386e+01 2.57216e+00 155 2005 10 4.14989e+01 2.40807e+00 334 2005 11 3.29120e+01 2.14753e+00 208 2005 12 2.91097e+01 4.99664e-01 128 2006 1 3.16892e+01 1.93103e+00 160 2006 2 3.96141e+01 2.78757e+00 176 2006 3 4.86999e+01 2.88243e+00 253 2006 4 5.72386e+01 1.74374e+00 192 2006 5 6.18983e+01 8.45800e-01 208 2006 6 6.33081e+01 2.12150e-01 151 2006 7 6.15934e+01 5.95722e-01 64 2006 8 5.78984e+01 1.74958e+00 160 2006 9 5.07314e+01 2.88025e+00 176 2006 10 4.23848e+01 2.95358e+00 222 2006 11 3.34856e+01 2.12478e+00 253 2006 12 2.95604e+01 6.05739e-01 176 2007 1 3.13353e+01 1.73304e+00 93 2007 2 3.92570e+01 2.05433e+00 112 2007 3 4.87872e+01 2.59730e+00 213 2007 4 5.78422e+01 1.88703e+00 176 2007 5 6.13912e+01 9.10954e-01 105 2007 6 6.33668e+01 1.68566e-01 91 2007 7 6.24900e+01 3.73370e-01 96 2007 8 5.78970e+01 1.52866e+00 48 2007 9 5.05486e+01 2.30032e+00 144 2007 10 4.21051e+01 3.14294e+00 208 2007 11 3.44923e+01 1.99934e+00 224 2007 12 2.92500e+01 3.19549e-01 128 2008 1 3.14358e+01 2.04571e+00 144 2008 2 3.95935e+01 2.94401e+00 256 2008 3 4.91760e+01 2.86519e+00 170 2008 4 5.87496e+01 1.13521e+00 128 2008 5 6.17647e+01 9.07695e-01 112 2008 6 6.33529e+01 1.77276e-01 176 2008 7 6.23099e+01 3.22920e-01 57 2008 8 5.71301e+01 1.56265e+00 176 2008 9 5.02081e+01 2.46171e+00 224 2008 10 4.09549e+01 2.92752e+00 208 2008 11 3.37893e+01 1.98096e+00 281 2008 12 2.93422e+01 5.15760e-01 160 2009 1 3.10082e+01 1.56717e+00 160 2009 2 3.88633e+01 2.85667e+00 128 2009 3 4.82971e+01 3.02823e+00 144 2009 4 5.74090e+01 1.86224e+00 112 2009 5 6.26545e+01 4.00825e-01 65 2009 6 6.33365e+01 8.02691e-02 129 2009 7 6.22390e+01 4.83379e-01 94 2009 8 5.79895e+01 1.53471e+00 161 2009 9 4.87319e+01 1.91162e+00 96 2009 10 4.28570e+01 1.84671e+00 161 2009 11 3.42627e+01 2.24957e+00 161 2009 12 2.91012e+01 1.50710e-01 80 2010 1 3.08260e+01 1.56887e+00 208 2010 2 4.02742e+01 2.31114e+00 144 2010 3 4.78730e+01 2.75104e+00 144 2010 4 5.68919e+01 1.90115e+00 144 2010 5 6.21747e+01 9.17078e-01 154 2010 6 6.31341e+01 1.64841e-01 157 2010 7 6.19896e+01 8.43115e-01 112 2010 8 5.78961e+01 1.06342e+00 80 2010 9 5.08792e+01 2.54877e+00 221 2010 10 4.26544e+01 2.65307e+00 335 2010 11 3.42413e+01 1.85441e+00 208 2010 12 2.94591e+01 5.08767e-01 224 2011 1 3.09491e+01 1.33735e+00 214 2011 2 4.04387e+01 1.59285e+00 176 2011 3 4.97291e+01 1.61709e+00 196 2011 4 5.71778e+01 2.17946e+00 96 2011 5 6.19616e+01 8.56017e-01 196 2011 6 6.32815e+01 1.35365e-01 144 2011 7 6.18374e+01 7.97095e-01 144 2011 8 5.74677e+01 1.66472e+00 159 2011 9 5.09849e+01 2.55091e+00 180 2011 10 4.24498e+01 2.84250e+00 320 2011 11 3.36271e+01 2.45305e+00 144 2011 12 2.92466e+01 6.05501e-01 86 2012 1 3.09693e+01 1.70770e+00 197 2012 2 3.85822e+01 2.41390e-01 48 2012 3 4.89704e+01 3.17230e+00 208 2012 4 5.72979e+01 1.90795e+00 176 2012 5 6.22177e+01 8.29872e-01 160 2012 6 6.33167e+01 1.19132e-01 128 2012 7 6.18586e+01 7.15031e-01 84 2012 8 5.79623e+01 1.12433e+00 100 2012 9 5.05595e+01 2.15495e+00 200 2012 10 4.14238e+01 2.65256e+00 317 2012 11 3.40649e+01 2.02949e+00 288 2012 12 2.93249e+01 4.57073e-01 128 2013 1 3.28465e+01 1.55323e+00 144 2013 2 3.85071e+01 2.09677e+00 117 2013 3 4.92028e+01 2.91391e+00 224 2013 4 5.77028e+01 1.79991e+00 81 2013 5 6.17760e+01 8.99384e-01 138 2013 6 6.31638e+01 2.13076e-01 67 2013 7 6.21118e+01 8.65964e-01 128 2013 8 5.66662e+01 1.32465e+00 76 2013 9 5.09077e+01 2.59315e+00 234 2013 10 4.21924e+01 2.34842e+00 176 2013 11 3.40094e+01 2.56892e+00 160 2013 12 2.92310e+01 4.19042e-01 128 2014 1 3.13497e+01 7.84177e-01 144 2014 2 3.91558e+01 2.28119e+00 176 2014 3 4.97840e+01 2.88577e+00 144 2014 4 5.69626e+01 1.64997e+00 112 2014 5 6.19534e+01 7.44284e-01 128 2014 6 6.32898e+01 1.70618e-01 112 2014 7 6.20366e+01 8.38775e-01 128 2014 8 5.73887e+01 1.22439e+00 144 2014 9 5.16873e+01 1.97547e+00 144 2014 10 4.15049e+01 2.64464e+00 331 2014 11 3.33307e+01 2.23697e+00 208 2014 12 2.93955e+01 4.38052e-01 178 2015 1 3.27391e+01 1.63440e+00 181 2015 2 3.82042e+01 1.56573e+00 192 2015 3 4.92565e+01 2.54213e+00 129 2015 4 5.60188e+01 1.98426e+00 80 2015 5 6.15378e+01 1.02335e+00 191 2015 6 6.32403e+01 1.15424e-01 146 2015 7 6.20592e+01 8.12809e-01 140 2015 8 5.72028e+01 1.74081e+00 185 2015 9 5.14854e+01 2.25331e+00 176 2015 10 4.26938e+01 1.70662e+00 160 2015 11 3.31736e+01 1.91600e+00 160 2015 12 2.94037e+01 4.02240e-01 143 2016 1 3.14024e+01 1.70163e+00 192 2016 2 3.97491e+01 2.58116e+00 256 2016 3 4.87545e+01 2.84864e+00 112 2016 4 5.70149e+01 1.83625e+00 159 2016 5 6.20400e+01 8.74350e-01 176 2016 6 6.33502e+01 6.80842e-02 96 2016 7 6.20503e+01 8.76172e-01 128 2016 8 5.71111e+01 1.37892e+00 148 2016 9 4.99504e+01 2.40026e+00 180 2016 10 4.19894e+01 2.75254e+00 287 2016 11 3.31630e+01 1.47331e+00 176 2016 12 2.91895e+01 4.78266e-01 166 2017 1 3.24796e+01 1.87810e+00 176 2017 2 3.97315e+01 2.68353e+00 224 2017 3 5.03760e+01 2.52781e+00 167 2017 4 5.67300e+01 1.73359e+00 144 2017 5 6.19580e+01 8.18405e-01 192 2017 6 6.32816e+01 6.34255e-02 96 2017 7 6.20166e+01 6.91286e-01 160 2017 8 5.77256e+01 9.21102e-01 88 2017 9 4.95478e+01 2.29565e+00 208 2017 10 4.09098e+01 2.57178e+00 215 2017 11 3.33683e+01 1.86363e+00 240 2017 12 2.91561e+01 3.32862e-01 192 2018 1 3.14608e+01 1.83652e+00 224 2018 2 3.96680e+01 2.11814e+00 112 2018 3 4.88656e+01 2.87614e+00 214 2018 4 5.73574e+01 1.84842e+00 221 2018 5 6.16264e+01 7.83876e-01 166 2018 6 6.31802e+01 9.65854e-02 127 2018 7 6.18172e+01 6.36344e-01 96 2018 8 5.69349e+01 1.71862e+00 65 2018 9 5.12337e+01 2.04991e+00 198 2018 10 4.21470e+01 2.78543e+00 224 2018 11 3.38980e+01 1.75383e+00 96 2018 12 2.94817e+01 4.94113e-01 101 2019 1 3.14596e+01 1.83573e+00 169 2019 2 4.04988e+01 2.61062e+00 64 2019 3 5.03607e+01 2.81721e+00 208 2019 4 5.83063e+01 1.18520e+00 144 2019 5 6.18629e+01 9.08749e-01 192 2019 6 6.33865e+01 1.03031e-01 64 2019 7 6.23173e+01 7.70506e-01 104 2019 8 5.72859e+01 1.69274e+00 112 2019 9 5.07886e+01 2.51638e+00 272 2019 10 4.35912e+01 2.59288e+00 144 2019 11 3.38029e+01 2.26635e+00 176 2019 12 2.94071e+01 5.25361e-01 145 2020 1 3.17874e+01 1.80000e+00 128 2020 2 3.96443e+01 3.48670e+00 130 2020 3 4.92585e+01 2.91796e+00 139 2020 4 5.71622e+01 2.28991e+00 144 2020 5 6.14389e+01 8.12424e-01 128 2020 6 6.34556e+01 1.06694e-01 112 2020 7 6.18972e+01 7.10981e-01 80 2020 8 5.92657e+01 8.03602e-01 112 2020 9 5.09945e+01 2.91933e+00 126 2020 10 4.17049e+01 2.24366e+00 179 2020 11 3.38611e+01 1.90486e+00 208 2020 12 2.93650e+01 4.37560e-01 208 2021 1 3.11909e+01 1.69582e+00 192 2021 2 3.98212e+01 2.74933e+00 128 2021 3 4.73955e+01 1.62443e+00 117 2021 4 5.66226e+01 2.26305e+00 176 2021 5 6.23120e+01 7.96397e-01 88 2021 6 6.32720e+01 9.65478e-02 64 2021 7 6.12953e+01 4.05882e-01 96 2021 8 5.86515e+01 1.16633e+00 125 2021 9 5.11190e+01 2.64853e+00 128 2021 10 4.14952e+01 2.43898e+00 153 2021 11 3.33784e+01 1.87573e+00 227 2021 12 2.92395e+01 4.87889e-01 160 2022 1 3.18553e+01 1.66651e+00 192 2022 2 3.97497e+01 2.39427e+00 201 2022 3 4.87046e+01 2.90495e+00 212 2022 4 5.90983e+01 7.90130e-01 81 2022 5 6.20202e+01 8.47006e-01 128 2022 6 6.32974e+01 1.28673e-01 177 2022 7 6.18365e+01 8.02934e-01 128 2022 8 5.66485e+01 1.81357e+00 119 2022 9 5.01858e+01 2.16271e+00 240 2022 10 4.29478e+01 2.32201e+00 278 2022 11 3.39663e+01 1.99360e+00 204 2022 12 2.92866e+01 5.00099e-01 144 2023 1 3.12867e+01 1.85891e+00 234 2023 2 3.89046e+01 2.64934e+00 160 2023 3 4.81181e+01 1.90824e+00 55 2023 4 5.76054e+01 1.27084e+00 43 2023 5 6.19501e+01 9.45701e-01 160 2023 6 6.32604e+01 1.36487e-01 128 2023 7 6.17185e+01 7.32239e-01 160 2023 8 5.79790e+01 1.58000e+00 224 2023 9 5.10350e+01 2.07335e+00 202 2023 10 4.13098e+01 3.02054e+00 213 2023 11 3.42190e+01 2.21423e+00 160 2023 12 2.90196e+01 2.16506e-01 129 2024 1 3.19340e+01 1.72849e+00 96 2024 2 4.06590e+01 2.24065e+00 91 2024 3 5.13599e+01 1.85036e+00 80 2024 4 5.47306e+01 3.54072e-01 32