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 nan nan 0 2002 8 1.73427e+00 1.33247e+00 59 2002 9 2.05799e+00 7.36497e-01 62 2002 10 2.32924e+00 8.20440e-01 110 2002 11 3.11877e+00 1.59200e+00 240 2002 12 3.69173e+00 1.24438e+00 123 2003 1 6.52561e+00 1.40139e+00 236 2003 2 3.59971e+00 9.31061e-01 160 2003 3 7.92747e+00 2.26394e+00 48 2003 4 6.42154e+00 3.37322e+00 48 2003 5 6.05548e+00 1.91495e-01 16 2003 6 3.93699e+00 5.12233e-01 29 2003 7 4.30252e+00 1.30808e-01 16 2003 8 3.52083e+00 9.69502e-02 5 2003 9 2.72692e+00 9.18195e-01 89 2003 10 2.56188e+00 1.74518e+00 192 2003 11 2.44051e+00 1.37944e+00 243 2003 12 5.33887e+00 1.94614e+00 195 2004 1 5.06683e+00 1.91956e+00 160 2004 2 3.01389e+00 5.21730e-01 64 2004 3 3.29183e+00 1.28904e+00 165 2004 4 4.88779e+00 2.64854e+00 106 2004 5 2.88833e+00 1.12011e+00 112 2004 6 2.39622e+00 4.78517e-01 64 2004 7 1.75812e+00 9.74700e-01 68 2004 8 1.61867e+00 1.89175e+00 83 2004 9 2.81984e+00 1.35027e+00 52 2004 10 5.38075e+00 2.54876e+00 64 2004 11 6.65531e+00 8.93181e-01 128 2004 12 7.74711e+00 1.98431e+00 126 2005 1 5.90453e+00 1.44023e+00 144 2005 2 4.26813e+00 1.53445e+00 112 2005 3 5.95170e+00 9.77936e-01 128 2005 4 6.36743e+00 6.55578e-01 36 2005 5 2.88943e+00 1.17435e+00 46 2005 6 4.87122e+00 1.12539e+00 61 2005 7 5.72454e+00 2.13376e+00 61 2005 8 4.34430e+00 1.66171e+00 62 2005 9 4.04131e+00 6.78762e-01 64 2005 10 3.64125e+00 2.26732e+00 181 2005 11 3.70640e+00 2.05357e+00 247 2005 12 5.14987e+00 1.90514e+00 183 2006 1 5.03013e+00 1.75464e+00 188 2006 2 6.41770e+00 1.46662e+00 147 2006 3 5.18818e+00 1.35010e+00 272 2006 4 3.96552e+00 1.14583e+00 77 2006 5 3.16604e+00 1.81540e+00 120 2006 6 1.81093e+00 1.37801e+00 64 2006 7 3.55252e-01 2.85491e-01 31 2006 8 2.05139e+00 8.47552e-01 49 2006 9 1.91719e+00 1.16477e+00 139 2006 10 2.51685e+00 1.69044e+00 226 2006 11 3.90358e+00 2.32920e+00 206 2006 12 1.96812e+00 1.90425e+00 119 2007 1 3.46757e+00 1.86388e+00 128 2007 2 3.35696e+00 1.78889e+00 245 2007 3 1.97070e+00 1.47503e+00 240 2007 4 2.46639e+00 2.09963e+00 175 2007 5 9.96921e-01 1.23948e-01 16 2007 6 2.05320e+00 1.68992e-01 16 2007 7 2.12723e+00 5.91971e-01 60 2007 8 1.82386e+00 5.89627e-01 83 2007 9 2.20769e+00 6.92376e-01 105 2007 10 1.72756e+00 1.03477e+00 160 2007 11 1.53504e+00 1.03370e+00 266 2007 12 2.39049e+00 2.09413e+00 208 2008 1 3.87966e+00 2.13902e+00 204 2008 2 2.78833e+00 1.26056e+00 297 2008 3 3.16458e+00 1.22416e+00 223 2008 4 2.82442e+00 1.37605e+00 114 2008 5 2.59726e+00 1.40766e+00 90 2008 6 1.83673e+00 1.29210e+00 54 2008 7 1.19543e+00 1.06681e+00 70 2008 8 2.26727e+00 1.01665e+00 32 2008 9 3.90420e+00 1.22802e+00 108 2008 10 3.48730e+00 1.20501e+00 192 2008 11 3.41263e+00 1.46990e+00 208 2008 12 4.52559e+00 1.72747e+00 198 2009 1 4.62892e+00 1.27939e+00 159 2009 2 3.62364e+00 1.47327e+00 240 2009 3 2.89226e+00 1.97099e+00 216 2009 4 3.25123e+00 2.11183e+00 100 2009 5 2.76700e+00 9.87691e-01 59 2009 6 1.81235e+00 1.70978e+00 68 2009 7 1.04350e+00 1.88868e+00 45 2009 8 1.85492e+00 1.47672e+00 77 2009 9 1.85139e+00 5.92629e-01 64 2009 10 1.99286e+00 1.15948e+00 203 2009 11 1.71021e+00 1.35536e+00 128 2009 12 3.65400e+00 1.31206e+00 44 2010 1 6.40744e+00 1.39673e+00 195 2010 2 7.86841e+00 2.14481e+00 114 2010 3 8.08189e+00 1.29490e+00 117 2010 4 5.37001e+00 2.27649e+00 94 2010 5 4.03835e+00 1.75617e+00 80 2010 6 8.31529e-02 2.34946e+00 85 2010 7 3.06103e+00 7.48222e-01 18 2010 8 1.57993e+00 1.67872e-01 4 2010 9 1.10674e+00 1.88301e+00 103 2010 10 1.92882e+00 1.16789e+00 286 2010 11 2.05845e+00 1.38961e+00 263 2010 12 3.51000e+00 1.86032e+00 231 2011 1 4.07804e+00 1.44947e+00 160 2011 2 2.38659e+00 9.15975e-01 151 2011 3 2.78407e+00 1.34190e+00 184 2011 4 2.78223e+00 1.24638e+00 128 2011 5 1.11338e+00 1.04745e+00 119 2011 6 7.15093e-02 7.14515e-01 55 2011 7 1.57008e+00 9.59036e-01 53 2011 8 1.89937e+00 1.16353e+00 100 2011 9 1.42957e+00 9.84687e-01 148 2011 10 2.09915e+00 1.28865e+00 223 2011 11 2.17023e+00 1.37974e+00 212 2011 12 2.46577e+00 1.29170e+00 228 2012 1 4.03135e+00 1.84998e+00 269 2012 2 3.90672e+00 9.44618e-01 48 2012 3 1.70932e+00 1.45890e+00 222 2012 4 1.64734e+00 8.78056e-01 171 2012 5 7.59157e-01 1.05041e+00 116 2012 6 1.67633e+00 4.17219e-01 42 2012 7 2.38066e+00 5.63139e-02 16 2012 8 5.76936e+00 7.90490e-01 18 2012 9 6.26898e+00 2.44546e+00 108 2012 10 4.63605e+00 1.29126e+00 187 2012 11 4.44912e+00 1.85110e+00 204 2012 12 5.02993e+00 2.37083e+00 109 2013 1 3.73558e+00 2.59357e+00 148 2013 2 4.59090e+00 1.63411e+00 160 2013 3 4.86134e+00 1.05027e+00 143 2013 4 2.14874e+00 9.93208e-01 76 2013 5 1.63900e+00 9.06541e-01 78 2013 6 5.57269e-01 2.32073e+00 49 2013 7 3.73035e+00 3.20780e-01 32 2013 8 8.34261e+00 9.78447e-01 21 2013 9 4.68244e+00 8.68365e-01 95 2013 10 3.46037e+00 1.64103e+00 178 2013 11 3.11574e+00 1.03942e+00 140 2013 12 2.58490e+00 1.35251e+00 200 2014 1 5.65683e+00 1.59317e+00 128 2014 2 3.93898e+00 1.67819e+00 148 2014 3 4.94203e+00 1.68113e+00 144 2014 4 6.41463e+00 3.21929e+00 48 2014 5 nan nan 0 2014 6 3.59438e+00 3.78340e-01 32 2014 7 8.85894e-01 1.48171e+00 64 2014 8 1.08856e+00 6.51264e-01 52 2014 9 4.77810e-01 6.27958e-01 64 2014 10 1.65093e+00 1.61701e+00 320 2014 11 3.93035e+00 2.16007e+00 248 2014 12 2.05235e+00 9.00163e-01 146 2015 1 3.19866e+00 2.29005e+00 217 2015 2 5.82325e+00 2.46333e+00 188 2015 3 3.65447e+00 1.03444e+00 95 2015 4 3.51792e+00 7.62288e-01 35 2015 5 1.91545e+00 5.34471e-01 66 2015 6 1.32034e+00 1.03377e+00 108 2015 7 8.28837e-01 2.02090e-01 16 2015 8 4.09959e+00 3.34695e-01 45 2015 9 2.36533e+00 2.09147e+00 48 2015 10 2.66949e+00 1.04957e+00 92 2015 11 2.74258e+00 1.05446e+00 140 2015 12 2.31393e+00 1.72963e+00 128 2016 1 4.43809e+00 1.11215e+00 176 2016 2 5.04756e+00 2.08690e+00 261 2016 3 4.55492e+00 1.34606e+00 184 2016 4 2.70696e+00 1.94119e+00 116 2016 5 1.69764e+00 1.66206e+00 78 2016 6 1.23460e+00 9.52122e-01 70 2016 7 9.90203e-01 1.71496e+00 112 2016 8 3.69666e+00 1.22894e+00 119 2016 9 4.23267e+00 9.46154e-01 128 2016 10 2.92856e+00 2.13245e+00 134 2016 11 1.57191e+00 1.01704e+00 199 2016 12 2.14443e+00 1.19889e+00 188 2017 1 3.62259e+00 2.59665e+00 160 2017 2 3.87886e+00 1.52062e+00 259 2017 3 2.73706e+00 1.02766e+00 238 2017 4 2.33541e+00 1.45428e+00 144 2017 5 2.60874e+00 6.52179e-01 80 2017 6 -3.86746e-01 1.07687e+00 49 2017 7 7.57605e-01 1.55303e+00 43 2017 8 1.70530e+00 1.74809e+00 79 2017 9 2.01398e+00 6.58910e-01 65 2017 10 3.68750e+00 1.40720e+00 151 2017 11 1.23951e+00 1.46166e+00 225 2017 12 2.39158e+00 1.80117e+00 174 2018 1 2.70485e+00 1.11182e+00 208 2018 2 2.75192e+00 4.04501e-01 128 2018 3 3.50924e+00 1.33207e+00 146 2018 4 1.74051e+00 7.20330e-01 108 2018 5 2.90971e+00 7.35974e-01 80 2018 6 3.06452e+00 1.45595e+00 64 2018 7 1.00739e+00 1.91011e+00 54 2018 8 4.18925e+00 1.53513e+00 80 2018 9 3.49097e+00 1.44811e+00 164 2018 10 3.25077e+00 1.59031e+00 196 2018 11 5.13480e+00 2.05124e+00 48 2018 12 6.22631e+00 2.17276e+00 158 2019 1 7.39639e+00 1.68198e+00 109 2019 2 7.42541e+00 3.83813e-01 48 2019 3 5.73283e+00 1.45997e+00 143 2019 4 4.32399e+00 1.48785e+00 105 2019 5 1.76096e+00 1.08507e+00 102 2019 6 3.08929e+00 5.61364e-01 39 2019 7 1.05762e+00 1.24275e+00 71 2019 8 2.89698e-01 1.57028e+00 80 2019 9 1.03846e+00 1.94619e+00 50 2019 10 2.14785e+00 1.51410e+00 135 2019 11 1.28501e+00 9.38758e-01 176 2019 12 4.36480e+00 1.55616e+00 128 2020 1 2.95371e+00 8.59989e-01 160 2020 2 2.90751e+00 1.30582e+00 128 2020 3 2.11096e+00 1.00151e+00 123 2020 4 3.22108e+00 1.08631e+00 123 2020 5 9.60680e-01 1.13405e+00 148 2020 6 5.83355e-01 2.53196e+00 74 2020 7 3.15979e+00 1.12012e+00 32 2020 8 1.62160e+00 9.08723e-01 44 2020 9 6.16573e+00 3.02158e-01 16 2020 10 3.99231e+00 1.69685e+00 103 2020 11 2.40671e+00 1.14910e+00 155 2020 12 3.90287e+00 1.18481e+00 125 2021 1 6.17041e+00 1.65310e+00 103 2021 2 3.86366e+00 1.67187e+00 128 2021 3 3.00033e+00 1.16793e+00 127 2021 4 3.27958e+00 4.66584e-01 62 2021 5 1.51788e+00 1.81161e+00 97 2021 6 2.28646e+00 9.97184e-01 48 2021 7 2.09273e+00 7.35896e-02 12 2021 8 9.64948e+00 6.98097e-01 17 2021 9 6.64100e+00 1.32626e+00 135 2021 10 4.39244e+00 1.59899e+00 108 2021 11 4.52862e+00 1.31176e+00 186 2021 12 3.52862e+00 1.12450e+00 127 2022 1 5.21359e+00 1.19351e+00 195 2022 2 2.62323e+00 1.00429e+00 166 2022 3 3.68737e+00 2.15390e+00 172 2022 4 3.54968e+00 1.67098e-01 16 2022 5 2.86272e+00 2.61066e-01 64 2022 6 1.30335e+00 1.50817e+00 62 2022 7 -3.10563e-01 1.69279e+00 65 2022 8 6.70429e-01 1.37984e+00 134 2022 9 1.79474e+00 9.96328e-01 71 2022 10 1.81285e+00 1.11296e+00 260 2022 11 2.55026e+00 1.11172e+00 135 2022 12 2.50881e+00 1.27108e+00 242 2023 1 2.92943e+00 1.13465e+00 198 2023 2 2.57632e+00 9.55290e-01 131 2023 3 3.14001e+00 9.83868e-01 208 2023 4 2.13451e+00 8.34862e-01 48 2023 5 1.26762e+00 2.19563e+00 96 2023 6 2.13161e+00 2.52140e+00 48 2023 7 1.89511e+00 1.16652e+00 34 2023 8 1.74183e+00 1.27388e+00 96 2023 9 2.27037e+00 1.27523e+00 74 2023 10 3.17897e+00 1.64748e+00 112 2023 11 2.32252e+00 9.64471e-01 200 2023 12 3.76070e+00 2.94524e+00 95 2024 1 6.39900e+00 1.14560e+00 97 2024 2 4.79265e+00 9.26031e-01 112 2024 3 3.94022e+00 9.50116e-01 64 2024 4 nan nan 0