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 1.17218e+00 2.19177e+00 40 2002 8 1.44981e+00 1.61747e+00 68 2002 9 2.72708e+00 1.19101e+00 94 2002 10 1.99858e+00 1.34233e+00 122 2002 11 5.17483e+00 1.90481e+00 172 2002 12 4.10761e+00 1.60461e+00 191 2003 1 6.41044e+00 8.35057e-01 227 2003 2 6.20009e+00 1.68585e+00 160 2003 3 7.36072e+00 2.09272e-01 16 2003 4 nan nan 0 2003 5 3.58051e+00 5.15950e-02 16 2003 6 3.05342e+00 1.88053e+00 43 2003 7 nan nan 0 2003 8 6.67998e+00 1.84971e+00 56 2003 9 5.89746e+00 1.63117e+00 102 2003 10 6.26042e+00 1.59096e+00 143 2003 11 7.23100e+00 3.11894e+00 119 2003 12 6.02591e+00 1.88757e+00 160 2004 1 5.66037e+00 2.07577e+00 116 2004 2 5.59897e+00 7.00453e-01 80 2004 3 4.55213e+00 2.12574e+00 126 2004 4 4.15563e+00 1.30438e+00 92 2004 5 3.44341e+00 7.22668e-01 64 2004 6 3.03394e+00 7.54969e-01 64 2004 7 3.14900e+00 1.12118e+00 90 2004 8 3.66178e+00 1.60262e+00 83 2004 9 6.92214e+00 2.25342e+00 48 2004 10 8.65983e+00 1.01026e+00 85 2004 11 8.12272e+00 9.77231e-01 54 2004 12 1.00944e+01 1.74854e+00 84 2005 1 8.29910e+00 1.43970e+00 139 2005 2 6.43528e+00 1.63286e+00 118 2005 3 7.47101e+00 1.71729e+00 144 2005 4 1.08505e+01 4.57654e-01 22 2005 5 4.87804e+00 3.17108e-01 3 2005 6 5.22229e+00 1.06542e+00 55 2005 7 6.31537e+00 7.97111e-01 36 2005 8 7.23730e+00 4.30180e-01 32 2005 9 4.82953e+00 1.06767e+00 32 2005 10 4.14688e+00 7.74003e-01 201 2005 11 5.68290e+00 1.92306e+00 258 2005 12 6.73143e+00 1.27378e+00 203 2006 1 8.42178e+00 1.89156e+00 170 2006 2 7.93440e+00 1.29055e+00 129 2006 3 6.33329e+00 1.60172e+00 173 2006 4 4.65768e+00 1.30246e+00 134 2006 5 2.85047e+00 7.51075e-01 127 2006 6 3.03728e+00 9.79170e-01 77 2006 7 1.72703e+00 1.05713e+00 70 2006 8 2.13162e+00 1.31734e+00 112 2006 9 3.35409e+00 1.25273e+00 164 2006 10 4.56862e+00 1.39611e+00 224 2006 11 4.26359e+00 1.49510e+00 202 2006 12 3.45058e+00 9.99209e-01 128 2007 1 5.83395e+00 1.40588e+00 118 2007 2 4.25315e+00 1.48943e+00 208 2007 3 3.63869e+00 1.04201e+00 151 2007 4 2.82443e+00 1.48610e+00 132 2007 5 1.45844e+00 1.00252e+00 51 2007 6 2.11047e+00 1.69780e-01 32 2007 7 1.57327e+00 8.44595e-01 51 2007 8 1.12938e+00 3.84810e-01 65 2007 9 1.86082e+00 7.53837e-01 140 2007 10 2.83295e+00 7.80602e-01 144 2007 11 4.34515e+00 7.34210e-01 272 2007 12 4.60684e+00 1.46554e+00 112 2008 1 6.44147e+00 2.30633e+00 147 2008 2 4.60654e+00 1.37450e+00 207 2008 3 4.16550e+00 1.71766e+00 211 2008 4 1.83839e+00 1.45090e+00 124 2008 5 7.01581e-01 1.34420e+00 101 2008 6 -3.65874e-02 1.70978e+00 75 2008 7 7.74540e-01 1.09953e+00 29 2008 8 -1.78833e-01 7.68335e-02 15 2008 9 4.13288e+00 1.43797e+00 73 2008 10 5.52842e+00 1.88451e+00 176 2008 11 4.47976e+00 1.26453e+00 192 2008 12 5.43360e+00 1.06612e+00 172 2009 1 5.64579e+00 1.28644e+00 179 2009 2 4.17559e+00 1.26771e+00 176 2009 3 3.41499e+00 1.58088e+00 172 2009 4 5.85235e+00 1.30463e+00 70 2009 5 3.23255e+00 2.72454e+00 39 2009 6 1.11869e+00 2.38204e+00 34 2009 7 5.64139e-01 2.64626e+00 48 2009 8 1.01657e+00 2.24830e+00 78 2009 9 3.01428e+00 1.80007e+00 116 2009 10 3.81113e+00 1.34693e+00 193 2009 11 3.38623e+00 1.47055e+00 101 2009 12 7.44716e+00 1.84435e+00 32 2010 1 9.36472e+00 1.46353e+00 100 2010 2 1.14556e+01 1.64942e+00 30 2010 3 1.02844e+01 1.70578e+00 89 2010 4 7.72202e+00 2.72387e+00 48 2010 5 5.24214e+00 1.58776e+00 48 2010 6 3.95298e+00 1.85198e+00 52 2010 7 3.44699e+00 2.65254e+00 45 2010 8 3.29828e+00 5.18655e-01 21 2010 9 4.24550e+00 1.55755e+00 98 2010 10 3.58701e+00 1.66942e+00 295 2010 11 3.81555e+00 1.47801e+00 255 2010 12 4.23499e+00 1.74609e+00 256 2011 1 3.84528e+00 8.58174e-01 167 2011 2 3.11537e+00 7.83410e-01 196 2011 3 4.34835e+00 1.00235e+00 160 2011 4 3.97480e+00 8.64876e-01 144 2011 5 1.33968e+00 1.24279e+00 132 2011 6 6.64872e-01 1.12822e+00 39 2011 7 9.20080e-01 8.58624e-01 47 2011 8 8.34606e-01 1.22910e+00 95 2011 9 1.52792e+00 1.26429e+00 150 2011 10 2.64036e+00 1.29785e+00 221 2011 11 3.31444e+00 1.31578e+00 232 2011 12 4.25841e+00 1.26450e+00 208 2012 1 3.74979e+00 1.59574e+00 269 2012 2 4.01021e+00 1.62329e+00 77 2012 3 2.15835e+00 1.82800e+00 200 2012 4 1.14231e+00 9.76796e-01 123 2012 5 8.70100e-01 9.80388e-01 112 2012 6 1.31235e+00 8.56088e-02 10 2012 7 3.50922e-01 1.79221e+00 40 2012 8 5.04170e+00 4.89265e-02 16 2012 9 7.47068e+00 4.20372e-01 14 2012 10 5.76089e+00 9.62322e-01 10 2012 11 4.56937e+00 1.35614e+00 214 2012 12 4.42921e+00 9.17273e-01 128 2013 1 4.13236e+00 1.83301e+00 106 2013 2 3.99831e+00 1.34153e+00 106 2013 3 4.95346e+00 1.07992e+00 99 2013 4 1.58871e+00 2.60206e+00 66 2013 5 nan nan 0 2013 6 -1.56177e+00 3.42770e+00 51 2013 7 2.03342e+00 0.00000e+00 2 2013 8 nan nan 0 2013 9 7.64146e+00 3.55555e+00 62 2013 10 5.54215e+00 1.46986e+00 132 2013 11 6.74593e+00 1.72908e+00 105 2013 12 5.32173e+00 1.64222e+00 100 2014 1 6.87188e+00 1.33192e+00 64 2014 2 7.75385e+00 1.48968e+00 95 2014 3 7.95268e+00 1.71177e+00 142 2014 4 1.07988e+01 3.59657e-01 16 2014 5 4.07647e+00 0.00000e+00 1 2014 6 6.18238e+00 1.23841e+00 19 2014 7 4.06941e+00 1.22567e+00 94 2014 8 3.02415e+00 5.93491e-01 97 2014 9 4.29500e+00 7.30064e-01 112 2014 10 4.90385e+00 1.02609e+00 322 2014 11 4.49974e+00 1.78297e+00 224 2014 12 4.07028e+00 1.29766e+00 184 2015 1 6.45749e+00 2.51598e+00 195 2015 2 8.29311e+00 2.03846e+00 153 2015 3 7.45542e+00 1.84640e+00 78 2015 4 5.97202e+00 1.30523e+00 35 2015 5 4.99823e+00 8.05906e-01 85 2015 6 3.21535e+00 8.55843e-01 133 2015 7 3.29467e+00 1.08456e+00 46 2015 8 3.17145e+00 6.53769e-01 71 2015 9 4.16535e+00 1.68520e+00 101 2015 10 3.71148e+00 1.10178e+00 156 2015 11 2.77497e+00 8.20218e-01 160 2015 12 4.72998e+00 1.98735e+00 137 2016 1 6.38402e+00 1.35801e+00 192 2016 2 6.45409e+00 1.62409e+00 304 2016 3 6.22995e+00 1.11791e+00 152 2016 4 3.51499e+00 2.91134e+00 101 2016 5 4.65125e+00 1.58865e+00 59 2016 6 2.27207e+00 1.29098e+00 112 2016 7 2.94042e+00 7.86625e-01 122 2016 8 3.24069e+00 1.05436e+00 144 2016 9 4.55397e+00 2.22374e+00 131 2016 10 5.21848e+00 1.68788e+00 153 2016 11 3.49927e+00 1.32092e+00 179 2016 12 4.59007e+00 1.26013e+00 190 2017 1 4.95830e+00 1.51639e+00 160 2017 2 4.36435e+00 9.36414e-01 240 2017 3 4.07558e+00 1.07910e+00 192 2017 4 2.81765e+00 1.80937e+00 134 2017 5 2.42628e+00 8.31698e-01 59 2017 6 6.39864e-01 2.00748e+00 38 2017 7 1.81386e+00 2.15093e+00 10 2017 8 1.75263e+00 2.07561e+00 96 2017 9 3.88807e+00 8.68438e-01 85 2017 10 3.85971e+00 1.26681e+00 247 2017 11 3.63664e+00 9.89274e-01 229 2017 12 2.97144e+00 1.61009e+00 176 2018 1 4.74923e+00 1.92094e+00 213 2018 2 3.00347e+00 1.07566e+00 128 2018 3 3.35998e+00 1.23125e+00 157 2018 4 1.37552e+00 1.19973e+00 46 2018 5 1.99611e+00 1.39420e+00 79 2018 6 2.09617e+00 2.55697e+00 30 2018 7 3.14451e+00 4.84642e-01 17 2018 8 7.81182e+00 1.19835e+00 32 2018 9 6.81020e+00 1.24369e+00 120 2018 10 5.87183e+00 1.96592e+00 249 2018 11 6.34668e+00 2.22625e+00 68 2018 12 9.09628e+00 2.50585e+00 90 2019 1 1.12887e+01 1.54634e+00 26 2019 2 5.46742e+00 1.26195e+00 50 2019 3 5.36757e+00 1.47242e+00 123 2019 4 4.67837e+00 5.73698e-01 67 2019 5 1.88351e+00 1.84315e+00 112 2019 6 1.74350e-01 1.37994e+00 48 2019 7 -1.43359e+00 1.11153e+00 57 2019 8 -2.40865e+00 2.83412e+00 55 2019 9 4.43479e+00 2.21069e+00 43 2019 10 4.42533e+00 9.67569e-01 110 2019 11 4.43458e+00 1.27414e+00 144 2019 12 5.25869e+00 1.85281e+00 80 2020 1 4.75247e+00 8.61629e-01 163 2020 2 4.77458e+00 1.40130e+00 135 2020 3 2.64984e+00 1.31360e+00 127 2020 4 2.67990e+00 3.27273e-01 51 2020 5 1.65331e+00 1.08821e+00 113 2020 6 2.66171e-01 0.00000e+00 1 2020 7 2.85865e+00 6.39863e-01 20 2020 8 nan nan 0 2020 9 4.78744e+00 1.13048e+00 25 2020 10 5.69439e+00 1.43691e+00 106 2020 11 5.57728e+00 2.04867e+00 124 2020 12 5.58884e+00 1.57549e+00 116 2021 1 7.72684e+00 9.86899e-01 64 2021 2 6.53810e+00 1.81832e+00 75 2021 3 8.21597e+00 9.23353e-01 27 2021 4 3.11102e+00 6.21200e-02 4 2021 5 -8.42404e-01 2.39278e+00 32 2021 6 3.75573e-01 1.50552e+00 33 2021 7 nan nan 0 2021 8 1.31188e+01 9.98866e-01 5 2021 9 7.82126e+00 1.59287e+00 58 2021 10 8.62937e+00 8.09635e-01 55 2021 11 5.37284e+00 6.59858e-01 83 2021 12 4.19016e+00 8.57134e-01 79 2022 1 5.01232e+00 1.18972e+00 162 2022 2 3.23460e+00 9.48071e-01 176 2022 3 3.55520e+00 1.86622e+00 92 2022 4 8.53722e-01 5.12117e-01 16 2022 5 -1.46412e+00 7.31711e-01 18 2022 6 -2.13108e-01 3.06401e-01 24 2022 7 -3.53881e-01 1.23952e+00 32 2022 8 2.44519e-01 2.53554e+00 69 2022 9 2.73174e+00 3.34955e+00 38 2022 10 2.85539e+00 1.20917e+00 59 2022 11 3.67565e+00 5.19562e-01 62 2022 12 3.96948e+00 1.32405e+00 130 2023 1 3.88676e+00 1.37414e+00 204 2023 2 3.73850e+00 1.00873e+00 133 2023 3 3.39469e+00 1.32977e+00 43 2023 4 -2.05699e-01 9.15925e-01 31 2023 5 9.93502e-01 2.51026e+00 67 2023 6 -4.41360e-02 1.96137e+00 63 2023 7 nan nan 0 2023 8 1.99622e-01 1.83823e+00 46 2023 9 3.85032e+00 7.85330e-01 25 2023 10 5.01019e+00 2.33746e+00 60 2023 11 4.21588e+00 2.02931e+00 112 2023 12 1.22617e+01 4.60352e-01 4 2024 1 nan nan 0 2024 2 1.00735e+01 9.11362e-01 95 2024 3 5.17211e+00 2.55002e+00 96 2024 4 nan nan 0