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 3.44888e+00 2.07965e-01 19 2002 8 3.04295e+00 6.74974e-01 36 2002 9 2.95843e+00 9.24635e-01 34 2002 10 2.96663e+00 8.73348e-01 67 2002 11 1.72760e+00 1.15470e+00 132 2002 12 2.54398e+00 9.59940e-01 114 2003 1 2.75116e+00 1.09413e+00 178 2003 2 3.26428e+00 9.24219e-01 102 2003 3 2.00321e+00 1.41631e+00 33 2003 4 2.56337e+00 9.86269e-01 145 2003 5 2.74904e+00 1.07575e+00 46 2003 6 1.98623e+00 9.65132e-01 32 2003 7 2.46562e+00 9.39067e-01 32 2003 8 1.13784e+00 0.00000e+00 2 2003 9 2.70685e+00 1.03330e+00 84 2003 10 2.75527e+00 1.26344e+00 128 2003 11 2.85322e+00 1.03995e+00 160 2003 12 2.84306e+00 9.43653e-01 103 2004 1 2.82341e+00 1.10455e+00 96 2004 2 2.61313e+00 9.98834e-01 32 2004 3 2.74356e+00 1.05058e+00 64 2004 4 2.91151e+00 9.13619e-01 76 2004 5 3.27292e+00 8.31592e-01 58 2004 6 nan nan 0 2004 7 2.92211e+00 7.85704e-01 32 2004 8 3.15442e+00 8.85352e-01 68 2004 9 3.13743e+00 7.93723e-01 7 2004 10 2.69433e+00 9.04834e-01 80 2004 11 2.55404e+00 9.42143e-01 78 2004 12 2.85698e+00 8.04130e-01 57 2005 1 2.74746e+00 1.00319e+00 120 2005 2 2.94253e+00 7.33505e-01 80 2005 3 2.65324e+00 8.46484e-01 121 2005 4 2.17103e+00 1.13967e+00 58 2005 5 2.88172e+00 1.10772e+00 78 2005 6 2.53403e+00 1.17408e+00 48 2005 7 2.67578e+00 1.07810e+00 15 2005 8 2.94166e+00 9.31360e-01 20 2005 9 2.80712e+00 1.00892e+00 55 2005 10 2.96175e+00 1.08064e+00 100 2005 11 2.80178e+00 8.81017e-01 84 2005 12 2.35420e+00 2.48782e+00 87 2006 1 2.91389e+00 7.80027e-01 96 2006 2 2.68988e+00 8.56920e-01 109 2006 3 3.03633e+00 8.85747e-01 129 2006 4 3.21295e+00 7.68710e-01 74 2006 5 3.26247e+00 8.21182e-01 71 2006 6 3.26397e+00 8.90721e-01 54 2006 7 3.06630e+00 9.80593e-01 16 2006 8 2.99373e+00 1.06445e+00 48 2006 9 2.83031e+00 1.09125e+00 84 2006 10 2.97530e+00 1.03140e+00 125 2006 11 3.03889e+00 9.55356e-01 141 2006 12 3.34818e+00 8.02252e-01 96 2007 1 2.81066e+00 8.58545e-01 82 2007 2 2.76963e+00 9.54536e-01 105 2007 3 3.05440e+00 9.28139e-01 121 2007 4 3.30124e+00 7.40739e-01 104 2007 5 3.35247e+00 8.24370e-01 41 2007 6 3.46387e+00 8.34373e-01 18 2007 7 2.97007e+00 8.59928e-01 32 2007 8 2.71616e+00 9.07616e-01 72 2007 9 3.04639e+00 8.52843e-01 54 2007 10 2.86919e+00 1.12088e+00 82 2007 11 2.88944e+00 9.94843e-01 176 2007 12 3.11456e+00 1.07194e+00 46 2008 1 3.10158e+00 7.36391e-01 108 2008 2 3.01016e+00 8.88386e-01 170 2008 3 2.78034e+00 9.45467e-01 116 2008 4 2.93100e+00 9.01587e-01 76 2008 5 3.08500e+00 9.59693e-01 48 2008 6 3.16585e+00 9.30131e-01 30 2008 7 nan nan 0 2008 8 nan nan 0 2008 9 2.66230e+00 8.30132e-01 75 2008 10 2.45807e+00 8.39477e-01 149 2008 11 2.69626e+00 9.04034e-01 175 2008 12 3.06161e+00 9.17999e-01 130 2009 1 2.94924e+00 9.24139e-01 112 2009 2 3.05927e+00 7.43058e-01 135 2009 3 3.17880e+00 7.03807e-01 77 2009 4 2.05999e+00 1.07104e+00 35 2009 5 3.06875e+00 7.94253e-01 28 2009 6 2.86071e+00 8.43089e-01 38 2009 7 3.89675e+00 0.00000e+00 1 2009 8 2.38896e+00 1.08269e+00 47 2009 9 2.50996e+00 8.65468e-01 46 2009 10 2.31050e+00 8.60581e-01 108 2009 11 2.36581e+00 1.03108e+00 83 2009 12 1.85561e+00 9.36277e-01 42 2010 1 1.54446e+00 1.00076e+00 123 2010 2 1.43991e+00 9.82414e-01 101 2010 3 2.08510e+00 9.84315e-01 125 2010 4 2.92558e+00 7.84534e-01 116 2010 5 2.85979e+00 9.89866e-01 51 2010 6 3.49800e+00 1.78035e+00 65 2010 7 2.86867e+00 1.38759e+00 50 2010 8 2.29591e+00 8.80512e-01 16 2010 9 3.01289e+00 8.83197e-01 124 2010 10 3.00136e+00 1.03598e+00 192 2010 11 3.17835e+00 9.68385e-01 185 2010 12 2.90827e+00 8.77120e-01 168 2011 1 2.99120e+00 8.53817e-01 126 2011 2 2.94424e+00 8.27649e-01 151 2011 3 2.98056e+00 8.21007e-01 127 2011 4 3.02050e+00 9.75015e-01 83 2011 5 3.01385e+00 8.09576e-01 127 2011 6 2.80491e+00 5.44898e-01 39 2011 7 2.57062e+00 8.91129e-01 32 2011 8 2.93690e+00 7.77527e-01 75 2011 9 3.11931e+00 7.76745e-01 101 2011 10 2.89042e+00 8.09007e-01 163 2011 11 2.92614e+00 8.67055e-01 176 2011 12 3.11433e+00 7.61360e-01 143 2012 1 3.02024e+00 8.50803e-01 182 2012 2 3.27099e+00 7.59407e-01 16 2012 3 3.01244e+00 9.06766e-01 149 2012 4 3.42389e+00 7.05876e-01 78 2012 5 3.40619e+00 7.55925e-01 74 2012 6 3.08410e+00 9.57811e-01 23 2012 7 2.68556e+00 8.60192e-01 27 2012 8 3.17208e+00 8.83076e-01 16 2012 9 2.57239e+00 8.82513e-01 46 2012 10 2.21972e+00 1.17512e+00 99 2012 11 2.93715e+00 8.07937e-01 130 2012 12 2.42480e+00 9.97045e-01 75 2013 1 2.87501e+00 7.65900e-01 97 2013 2 3.07769e+00 7.05338e-01 59 2013 3 1.61956e+00 1.06634e+00 93 2013 4 2.61446e+00 8.11279e-01 51 2013 5 3.16517e+00 6.99295e-01 37 2013 6 3.27609e+00 6.94032e-01 48 2013 7 nan nan 0 2013 8 2.79061e+00 1.45104e+00 66 2013 9 2.59225e+00 1.31419e+00 63 2013 10 2.28679e+00 8.92284e-01 116 2013 11 3.17453e+00 8.45736e-01 90 2013 12 3.03091e+00 9.09449e-01 101 2014 1 2.00126e+00 1.06155e+00 67 2014 2 3.02698e+00 7.64816e-01 128 2014 3 2.65624e+00 9.78958e-01 65 2014 4 2.81075e+00 8.39335e-01 76 2014 5 2.19637e+00 1.44753e+00 53 2014 6 3.52173e+00 8.76426e-01 56 2014 7 2.98161e+00 9.51435e-01 48 2014 8 2.97636e+00 8.22287e-01 48 2014 9 2.79370e+00 8.07726e-01 53 2014 10 2.66980e+00 7.24172e-01 198 2014 11 2.57779e+00 1.14209e+00 164 2014 12 3.08620e+00 1.11375e+00 128 2015 1 2.30283e+00 9.94713e-01 131 2015 2 2.36624e+00 1.00104e+00 138 2015 3 2.88628e+00 8.69065e-01 81 2015 4 2.88145e+00 8.59869e-01 64 2015 5 2.80516e+00 6.38854e-01 86 2015 6 2.53642e+00 7.67077e-01 22 2015 7 2.80846e+00 6.59951e-01 16 2015 8 2.56228e+00 9.48438e-01 27 2015 9 2.56456e+00 8.66181e-01 52 2015 10 2.88070e+00 8.17239e-01 127 2015 11 2.88307e+00 8.97952e-01 162 2015 12 2.87583e+00 1.03745e+00 73 2016 1 1.81337e+00 1.01213e+00 124 2016 2 2.55685e+00 9.60066e-01 194 2016 3 2.91708e+00 8.73869e-01 83 2016 4 1.07197e+00 1.51942e+00 63 2016 5 3.12414e+00 1.12745e+00 81 2016 6 3.15638e+00 9.70990e-01 87 2016 7 3.15836e+00 8.77185e-01 72 2016 8 2.63455e+00 1.20933e+00 31 2016 9 2.68846e+00 9.69900e-01 46 2016 10 2.61720e+00 8.12440e-01 115 2016 11 2.78476e+00 5.83348e-01 147 2016 12 3.23257e+00 7.28750e-01 165 2017 1 2.71718e+00 8.83698e-01 116 2017 2 2.97539e+00 8.41728e-01 144 2017 3 3.08356e+00 8.83392e-01 108 2017 4 3.00542e+00 8.77387e-01 96 2017 5 3.34923e+00 7.39382e-01 70 2017 6 3.36785e+00 1.16188e+00 33 2017 7 1.72158e+00 1.64646e+00 20 2017 8 3.14266e+00 9.50846e-01 30 2017 9 2.95627e+00 7.87220e-01 48 2017 10 2.71867e+00 6.11292e-01 88 2017 11 3.00777e+00 7.20241e-01 199 2017 12 3.07780e+00 8.10045e-01 64 2018 1 3.15747e+00 8.45595e-01 135 2018 2 3.36353e+00 7.93466e-01 94 2018 3 2.90755e+00 8.29407e-01 137 2018 4 3.12869e+00 6.81604e-01 124 2018 5 3.28712e+00 6.83954e-01 55 2018 6 3.20746e+00 1.00216e+00 50 2018 7 2.87862e+00 1.11456e+00 35 2018 8 nan nan 0 2018 9 2.87672e+00 1.05247e+00 63 2018 10 2.00941e+00 1.04801e+00 156 2018 11 2.26123e+00 1.28527e+00 85 2018 12 1.54536e+00 1.13985e+00 112 2019 1 1.85272e+00 1.05351e+00 141 2019 2 2.32659e+00 8.89478e-01 48 2019 3 2.60842e+00 8.79430e-01 90 2019 4 2.43787e+00 6.68096e-01 69 2019 5 2.98043e+00 8.48182e-01 65 2019 6 3.24273e+00 9.05771e-01 48 2019 7 3.13740e+00 8.30706e-01 16 2019 8 3.07275e+00 5.18486e-01 45 2019 9 2.57038e+00 8.86706e-01 106 2019 10 2.60853e+00 6.65589e-01 107 2019 11 2.98434e+00 8.13448e-01 119 2019 12 3.43778e+00 2.71317e-01 13 2020 1 2.96484e+00 9.62296e-01 64 2020 2 2.22554e+00 8.40479e-01 117 2020 3 2.45423e+00 8.75837e-01 65 2020 4 3.20529e+00 6.81739e-01 101 2020 5 3.00146e+00 7.87477e-01 84 2020 6 2.99968e+00 8.19258e-01 16 2020 7 3.44467e+00 5.92423e-01 23 2020 8 3.55321e+00 1.16254e+00 38 2020 9 1.21017e-01 9.23496e-01 20 2020 10 1.97029e+00 8.56044e-01 78 2020 11 2.67390e+00 6.01812e-01 154 2020 12 2.79264e+00 7.26857e-01 166 2021 1 2.52948e+00 8.13542e-01 89 2021 2 2.28193e+00 9.67290e-01 83 2021 3 2.93946e+00 8.13492e-01 71 2021 4 2.74432e+00 8.80049e-01 116 2021 5 2.80113e+00 7.47978e-01 75 2021 6 nan nan 0 2021 7 2.88025e+00 5.02521e-01 42 2021 8 2.80617e+00 8.68500e-01 39 2021 9 2.08115e+00 7.60586e-01 36 2021 10 2.63930e+00 1.24182e+00 77 2021 11 2.94618e+00 8.36067e-01 183 2021 12 3.13665e+00 7.45585e-01 103 2022 1 2.75830e+00 9.02195e-01 175 2022 2 3.02752e+00 6.92030e-01 99 2022 3 2.62872e+00 8.67916e-01 156 2022 4 2.94418e+00 7.08654e-01 32 2022 5 3.10556e+00 6.58559e-01 48 2022 6 2.76219e+00 7.47021e-01 51 2022 7 3.05204e+00 5.70992e-01 52 2022 8 2.92911e+00 8.63598e-01 64 2022 9 2.32226e+00 9.91204e-01 70 2022 10 2.82366e+00 8.71480e-01 258 2022 11 3.01851e+00 9.68557e-01 81 2022 12 3.22894e+00 9.30627e-01 156 2023 1 2.96836e+00 8.16199e-01 214 2023 2 2.82871e+00 8.86805e-01 167 2023 3 3.54711e+00 7.08135e-01 125 2023 4 2.93346e+00 8.62032e-01 76 2023 5 2.76501e+00 9.79463e-01 44 2023 6 3.38592e+00 6.44943e-01 20 2023 7 3.09854e+00 7.77859e-01 48 2023 8 1.89972e+00 6.94524e-01 49 2023 9 2.37856e+00 8.14470e-01 138 2023 10 3.00297e+00 1.20077e+00 192 2023 11 3.10693e+00 6.87502e-01 140 2023 12 2.76882e+00 9.95003e-01 75 2024 1 2.90929e+00 1.24308e+00 121 2024 2 2.48732e+00 8.91227e-01 159 2024 3 2.60503e+00 8.62141e-01 125 2024 4 nan nan 0