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 6.20520e+01 5.66938e-02 18 2002 8 5.77051e+01 3.91622e-01 18 2002 9 5.21176e+01 2.24693e+00 84 2002 10 4.42594e+01 2.47210e+00 164 2002 11 3.75791e+01 1.77649e+00 77 2002 12 3.29694e+01 3.50004e-01 140 2003 1 3.48595e+01 1.11207e+00 144 2003 2 4.14508e+01 1.92440e+00 108 2003 3 5.04254e+01 2.58882e+00 65 2003 4 5.64821e+01 9.10423e-01 60 2003 5 6.13886e+01 3.88562e-01 60 2003 6 nan nan 0 2003 7 nan nan 0 2003 8 5.91751e+01 3.91515e-01 32 2003 9 5.18467e+01 1.03576e+00 64 2003 10 4.46988e+01 2.03025e+00 134 2003 11 3.62280e+01 1.31340e+00 153 2003 12 3.29337e+01 2.17076e-01 112 2004 1 3.54943e+01 1.46964e+00 126 2004 2 4.26371e+01 2.72065e+00 108 2004 3 5.04695e+01 2.85244e+00 93 2004 4 5.80574e+01 1.23916e+00 45 2004 5 6.16173e+01 1.03286e+00 69 2004 6 6.26079e+01 2.38831e-01 124 2004 7 6.19930e+01 7.30712e-01 45 2004 8 5.73521e+01 8.81202e-01 33 2004 9 5.11856e+01 2.11248e+00 63 2004 10 4.41004e+01 2.42486e+00 85 2004 11 3.72345e+01 1.82894e+00 118 2004 12 3.26425e+01 5.35876e-01 100 2005 1 3.51107e+01 1.42198e+00 134 2005 2 4.26675e+01 1.33659e+00 111 2005 3 5.01575e+01 2.47781e+00 112 2005 4 5.73453e+01 1.42595e+00 96 2005 5 6.20785e+01 2.20933e-01 41 2005 6 6.26420e+01 1.39287e-02 16 2005 7 6.21724e+01 3.54141e-01 52 2005 8 6.03280e+01 5.13373e-01 31 2005 9 5.18330e+01 1.88291e+00 80 2005 10 4.39510e+01 2.70178e+00 95 2005 11 3.65868e+01 2.30164e+00 136 2005 12 3.30810e+01 3.80019e-01 156 2006 1 3.48553e+01 1.58837e+00 136 2006 2 4.25753e+01 1.66900e+00 199 2006 3 5.00266e+01 2.75032e+00 133 2006 4 5.68760e+01 1.66835e+00 79 2006 5 6.16778e+01 5.58964e-01 48 2006 6 6.27376e+01 2.71134e-01 32 2006 7 6.18829e+01 5.21246e-01 32 2006 8 5.76196e+01 1.25135e+00 37 2006 9 5.28546e+01 1.82410e+00 40 2006 10 4.40717e+01 1.94386e+00 101 2006 11 3.63537e+01 1.40879e+00 112 2006 12 3.30543e+01 2.15882e-01 42 2007 1 3.58032e+01 1.73926e+00 128 2007 2 4.27629e+01 1.86416e+00 112 2007 3 5.16153e+01 1.46646e+00 30 2007 4 5.71860e+01 1.51518e+00 120 2007 5 6.12613e+01 4.62103e-01 63 2007 6 6.28035e+01 9.40420e-02 64 2007 7 6.17341e+01 6.37613e-01 61 2007 8 5.89088e+01 1.58607e+00 67 2007 9 5.37151e+01 7.80665e-02 16 2007 10 4.64007e+01 2.28719e+00 47 2007 11 3.68691e+01 1.70553e+00 214 2007 12 3.29153e+01 4.26133e-01 182 2008 1 3.69201e+01 1.62811e+00 50 2008 2 4.18520e+01 2.53355e+00 121 2008 3 4.99090e+01 2.08446e+00 36 2008 4 5.83980e+01 2.12175e+00 52 2008 5 6.09168e+01 1.02704e-01 24 2008 6 6.28563e+01 9.77731e-02 47 2008 7 6.15093e+01 6.71080e-01 71 2008 8 5.87039e+01 1.33810e+00 64 2008 9 nan nan 0 2008 10 4.46019e+01 2.92239e+00 73 2008 11 3.60593e+01 1.68688e+00 149 2008 12 3.27369e+01 1.43654e-01 90 2009 1 3.53313e+01 1.86314e+00 195 2009 2 4.17249e+01 2.22582e+00 139 2009 3 4.86195e+01 1.60671e+00 78 2009 4 5.82379e+01 1.17580e+00 32 2009 5 6.14082e+01 3.59390e-01 80 2009 6 nan nan 0 2009 7 6.20218e+01 1.62002e-02 16 2009 8 6.04090e+01 3.73180e-01 33 2009 9 5.51529e+01 1.59527e-02 16 2009 10 4.42085e+01 2.77857e+00 141 2009 11 3.65098e+01 1.72072e+00 143 2009 12 3.29410e+01 1.97397e-01 82 2010 1 3.53276e+01 1.52354e+00 136 2010 2 4.39197e+01 1.99304e+00 95 2010 3 5.07899e+01 2.32849e+00 117 2010 4 5.78046e+01 2.00586e+00 50 2010 5 6.16278e+01 6.07369e-01 64 2010 6 6.27529e+01 7.04846e-02 80 2010 7 6.11060e+01 7.98943e-02 48 2010 8 5.93841e+01 7.69078e-01 47 2010 9 nan nan 0 2010 10 4.60244e+01 2.29018e+00 161 2010 11 3.72173e+01 1.88471e+00 172 2010 12 3.30207e+01 5.57480e-01 234 2011 1 3.48457e+01 1.92178e+00 80 2011 2 4.34501e+01 1.89450e+00 135 2011 3 5.08884e+01 2.20494e+00 148 2011 4 5.69755e+01 1.55033e+00 64 2011 5 6.16485e+01 4.63363e-01 61 2011 6 6.25819e+01 2.29383e-01 60 2011 7 6.16095e+01 5.89631e-01 44 2011 8 nan nan 0 2011 9 5.27650e+01 1.91199e+00 46 2011 10 4.65002e+01 1.74063e+00 69 2011 11 3.79676e+01 1.83284e+00 121 2011 12 3.30782e+01 5.00553e-01 156 2012 1 3.43339e+01 1.11916e+00 167 2012 2 4.38095e+01 1.20042e+00 96 2012 3 5.14228e+01 2.13584e+00 97 2012 4 5.67730e+01 1.73520e+00 61 2012 5 6.15264e+01 6.27273e-01 48 2012 6 6.29457e+01 4.24227e-02 32 2012 7 6.20396e+01 5.72007e-01 32 2012 8 5.80963e+01 1.40661e+00 39 2012 9 5.34640e+01 2.54245e+00 72 2012 10 4.35746e+01 1.99573e+00 138 2012 11 3.70879e+01 1.93216e+00 175 2012 12 3.29907e+01 8.15290e-01 52 2013 1 3.58331e+01 1.78637e+00 124 2013 2 4.18193e+01 2.35906e+00 127 2013 3 5.06924e+01 2.15807e+00 140 2013 4 5.72121e+01 1.07340e+00 31 2013 5 6.15304e+01 2.79856e-01 64 2013 6 6.27995e+01 1.18985e-01 32 2013 7 6.19944e+01 6.18408e-01 90 2013 8 5.92885e+01 1.08746e-02 16 2013 9 5.36687e+01 2.41173e+00 36 2013 10 4.43523e+01 2.11835e+00 194 2013 11 3.75231e+01 2.31292e+00 80 2013 12 3.29753e+01 4.67426e-01 136 2014 1 3.59198e+01 1.32974e+00 150 2014 2 4.17392e+01 2.25072e+00 168 2014 3 4.95798e+01 1.85327e+00 157 2014 4 5.80797e+01 2.25412e+00 69 2014 5 6.11979e+01 6.53865e-01 74 2014 6 6.27695e+01 1.41589e-01 72 2014 7 6.18424e+01 4.18403e-01 38 2014 8 5.93876e+01 1.04332e+00 80 2014 9 5.07365e+01 2.05880e+00 36 2014 10 4.40760e+01 2.23155e+00 122 2014 11 3.75444e+01 1.75018e+00 115 2014 12 3.28593e+01 2.69509e-01 122 2015 1 3.58298e+01 1.86961e+00 115 2015 2 4.23111e+01 1.52250e+00 144 2015 3 5.07743e+01 2.61820e+00 158 2015 4 5.73092e+01 1.30809e+00 37 2015 5 6.10674e+01 8.97466e-01 96 2015 6 6.27042e+01 1.07169e-01 57 2015 7 6.16065e+01 8.46697e-01 72 2015 8 5.97321e+01 1.00428e+00 64 2015 9 5.22239e+01 1.00868e+00 30 2015 10 4.28236e+01 5.05618e-01 36 2015 11 3.60119e+01 2.17607e+00 87 2015 12 3.26716e+01 1.00709e-01 88 2016 1 3.66221e+01 9.81215e-01 54 2016 2 4.28379e+01 2.65134e+00 126 2016 3 5.07916e+01 2.68636e+00 96 2016 4 5.70858e+01 1.51739e-01 22 2016 5 6.13799e+01 6.22088e-01 49 2016 6 6.26369e+01 6.63381e-02 42 2016 7 6.19789e+01 6.45099e-01 112 2016 8 5.88435e+01 9.62296e-01 56 2016 9 5.16247e+01 1.36151e+00 96 2016 10 4.56716e+01 2.08160e+00 53 2016 11 3.60711e+01 1.42568e+00 159 2016 12 3.27221e+01 2.18371e-01 96 2017 1 3.57028e+01 2.06480e+00 154 2017 2 4.22694e+01 1.85601e+00 94 2017 3 5.03566e+01 2.65453e+00 147 2017 4 5.85662e+01 1.09710e+00 48 2017 5 6.10857e+01 8.86446e-01 126 2017 6 6.27458e+01 2.25542e-01 48 2017 7 6.20333e+01 4.57617e-01 84 2017 8 5.88494e+01 1.16143e+00 110 2017 9 5.38186e+01 2.01569e+00 41 2017 10 4.40754e+01 2.33464e+00 74 2017 11 3.68169e+01 2.01670e+00 169 2017 12 3.29091e+01 3.56074e-01 264 2018 1 3.49022e+01 1.52192e+00 117 2018 2 4.21501e+01 1.65390e+00 183 2018 3 5.01618e+01 2.52246e+00 150 2018 4 5.89854e+01 6.34843e-01 62 2018 5 6.08954e+01 1.20172e-01 13 2018 6 6.26736e+01 1.36721e-02 32 2018 7 6.22158e+01 2.62212e-01 61 2018 8 5.94147e+01 8.52765e-01 42 2018 9 5.24676e+01 1.93413e+00 127 2018 10 4.46181e+01 2.79933e+00 90 2018 11 3.78362e+01 1.30171e+00 58 2018 12 3.30453e+01 3.88756e-01 102 2019 1 3.44249e+01 7.77654e-01 151 2019 2 4.23685e+01 2.48151e+00 243 2019 3 5.07009e+01 2.62795e+00 128 2019 4 5.83221e+01 1.63794e+00 96 2019 5 6.21207e+01 5.80021e-01 30 2019 6 6.27922e+01 1.06620e-01 32 2019 7 6.14635e+01 3.90516e-01 66 2019 8 5.89496e+01 6.46360e-01 66 2019 9 5.16837e+01 7.46808e-01 48 2019 10 4.42768e+01 2.89625e+00 110 2019 11 3.70406e+01 1.91904e+00 153 2019 12 3.31894e+01 4.96168e-01 147 2020 1 3.51312e+01 1.65879e+00 174 2020 2 4.14340e+01 2.18688e+00 102 2020 3 5.08715e+01 2.00137e+00 61 2020 4 5.74522e+01 2.03917e+00 90 2020 5 6.17400e+01 7.38555e-01 68 2020 6 6.27443e+01 1.06608e-01 48 2020 7 6.18310e+01 4.11385e-01 27 2020 8 5.81686e+01 1.26175e+00 89 2020 9 5.12134e+01 1.31848e+00 70 2020 10 4.44103e+01 2.66045e+00 102 2020 11 3.58030e+01 1.17183e+00 71 2020 12 3.28129e+01 2.64643e-01 167 2021 1 3.54271e+01 1.64375e+00 187 2021 2 4.21172e+01 2.77724e+00 113 2021 3 5.02831e+01 2.61075e+00 145 2021 4 5.79480e+01 4.61528e-01 48 2021 5 6.08595e+01 9.08034e-01 50 2021 6 nan nan 0 2021 7 6.15292e+01 5.95506e-01 93 2021 8 5.80774e+01 1.25269e+00 90 2021 9 5.12251e+01 2.33556e+00 73 2021 10 4.59498e+01 1.74734e+00 66 2021 11 3.58651e+01 1.87717e+00 108 2021 12 3.30974e+01 4.13983e-01 218 2022 1 3.51866e+01 1.62640e+00 112 2022 2 4.25084e+01 2.47141e+00 162 2022 3 5.07647e+01 1.02803e+00 48 2022 4 5.91767e+01 6.49516e-01 44 2022 5 6.12663e+01 6.09581e-01 103 2022 6 6.26500e+01 2.79102e-01 64 2022 7 6.21920e+01 4.00613e-01 134 2022 8 5.87542e+01 9.76237e-01 62 2022 9 5.33278e+01 1.48998e+00 79 2022 10 4.37458e+01 2.14478e+00 99 2022 11 3.63626e+01 1.90367e+00 164 2022 12 3.29198e+01 2.59176e-01 117 2023 1 3.50301e+01 1.61681e+00 229 2023 2 4.32602e+01 2.42299e+00 219 2023 3 4.98911e+01 2.59263e+00 112 2023 4 5.87276e+01 1.96984e-01 16 2023 5 6.09955e+01 3.14059e-01 42 2023 6 6.27845e+01 4.10068e-02 48 2023 7 6.22104e+01 1.20878e-02 16 2023 8 5.85477e+01 9.86339e-01 79 2023 9 5.51064e+01 6.87840e-01 22 2023 10 4.40193e+01 2.33153e+00 64 2023 11 3.60233e+01 1.92414e+00 70 2023 12 3.24826e+01 9.20447e-01 107 2024 1 3.65294e+01 2.00209e+00 53 2024 2 4.39020e+01 2.21839e+00 103 2024 3 5.17482e+01 2.69586e+00 72 2024 4 5.58514e+01 2.76108e-02 16