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 6.30074e+01 5.42120e-01 112 2002 8 5.70224e+01 1.18278e+00 110 2002 9 4.88847e+01 1.70203e+00 61 2002 10 4.25944e+01 2.83767e+00 112 2002 11 3.29620e+01 1.43813e+00 181 2002 12 2.90445e+01 5.44972e-01 171 2003 1 3.10030e+01 1.49546e+00 240 2003 2 3.79598e+01 2.15289e+00 160 2003 3 4.99115e+01 2.14382e+00 107 2003 4 5.72123e+01 2.18716e+00 124 2003 5 nan nan 0 2003 6 6.31398e+01 2.40370e-01 22 2003 7 6.29527e+01 8.85436e-01 64 2003 8 5.76846e+01 1.12640e+00 58 2003 9 5.12272e+01 2.24740e+00 119 2003 10 4.19592e+01 2.79187e+00 242 2003 11 3.37393e+01 2.16841e+00 286 2003 12 2.90323e+01 4.63869e-01 223 2004 1 3.18737e+01 1.51295e+00 142 2004 2 4.06338e+01 2.42989e+00 64 2004 3 4.95920e+01 1.98734e+00 192 2004 4 5.66838e+01 2.14557e+00 169 2004 5 6.17290e+01 9.89101e-01 147 2004 6 6.34669e+01 2.44665e-03 16 2004 7 6.31846e+01 6.50525e-01 64 2004 8 5.89588e+01 1.64405e+00 96 2004 9 5.14259e+01 2.34528e+00 176 2004 10 4.16220e+01 2.34402e+00 116 2004 11 3.37452e+01 2.27789e+00 145 2004 12 2.87249e+01 1.68758e-01 160 2005 1 3.22248e+01 1.63263e+00 132 2005 2 3.88520e+01 1.35432e+00 112 2005 3 4.81599e+01 2.59191e+00 176 2005 4 5.68745e+01 1.46275e+00 98 2005 5 6.12776e+01 5.23952e-01 80 2005 6 6.32868e+01 2.50785e-01 99 2005 7 6.29511e+01 3.41783e-01 117 2005 8 5.76154e+01 1.39018e+00 44 2005 9 5.10563e+01 2.98614e+00 95 2005 10 4.15375e+01 2.61387e+00 347 2005 11 3.23632e+01 1.86905e+00 178 2005 12 2.86577e+01 1.59649e-01 128 2006 1 3.16046e+01 1.82635e+00 144 2006 2 3.93231e+01 2.72381e+00 171 2006 3 4.83188e+01 2.86321e+00 259 2006 4 5.71178e+01 1.86339e+00 171 2006 5 6.20329e+01 6.52350e-01 153 2006 6 6.33905e+01 1.47558e-01 134 2006 7 6.31459e+01 1.32539e-01 32 2006 8 5.82665e+01 1.85272e+00 69 2006 9 4.97591e+01 2.47577e+00 142 2006 10 4.16124e+01 2.85671e+00 192 2006 11 3.32929e+01 2.17529e+00 244 2006 12 2.92724e+01 6.16573e-01 192 2007 1 3.19249e+01 1.98538e+00 96 2007 2 3.90169e+01 1.87919e+00 156 2007 3 4.86165e+01 2.29382e+00 210 2007 4 5.75916e+01 1.91413e+00 150 2007 5 6.06075e+01 2.01870e-01 60 2007 6 6.34468e+01 1.51162e-01 96 2007 7 6.33714e+01 2.21760e-01 64 2007 8 5.85328e+01 1.50861e+00 59 2007 9 5.08701e+01 2.20014e+00 108 2007 10 4.21425e+01 3.11023e+00 189 2007 11 3.34621e+01 1.88669e+00 240 2007 12 2.89423e+01 3.35203e-01 126 2008 1 3.12107e+01 2.10582e+00 144 2008 2 3.91649e+01 2.97392e+00 231 2008 3 4.94694e+01 2.76673e+00 174 2008 4 5.82689e+01 1.22256e+00 83 2008 5 6.24535e+01 4.98866e-01 51 2008 6 6.33815e+01 1.59662e-01 114 2008 7 6.33184e+01 2.52010e-01 96 2008 8 5.68657e+01 1.33059e+00 107 2008 9 5.03603e+01 2.48489e+00 139 2008 10 4.10680e+01 2.77471e+00 257 2008 11 3.38601e+01 1.86313e+00 289 2008 12 2.91952e+01 5.95007e-01 112 2009 1 3.16708e+01 1.70311e+00 184 2009 2 3.84645e+01 2.57582e+00 128 2009 3 4.78126e+01 2.85853e+00 124 2009 4 5.66306e+01 1.59279e+00 76 2009 5 6.19753e+01 1.03220e+00 32 2009 6 6.34588e+01 9.59138e-02 121 2009 7 6.32555e+01 2.17902e-03 16 2009 8 5.81084e+01 1.59411e+00 74 2009 9 4.96899e+01 1.85338e+00 112 2009 10 4.18653e+01 1.90446e+00 136 2009 11 3.43926e+01 1.85331e+00 188 2009 12 2.89784e+01 4.79874e-01 104 2010 1 3.07982e+01 1.72602e+00 176 2010 2 4.00688e+01 2.27602e+00 190 2010 3 4.67332e+01 2.22907e+00 113 2010 4 5.72296e+01 1.69728e+00 146 2010 5 6.15981e+01 7.66483e-01 110 2010 6 6.32468e+01 1.82942e-01 138 2010 7 6.28257e+01 6.90633e-01 99 2010 8 5.76985e+01 1.28282e+00 48 2010 9 5.11468e+01 2.59234e+00 185 2010 10 4.23250e+01 2.74682e+00 335 2010 11 3.40296e+01 1.82519e+00 198 2010 12 2.91445e+01 5.00888e-01 252 2011 1 3.09393e+01 1.30551e+00 223 2011 2 3.97973e+01 1.48473e+00 174 2011 3 4.95067e+01 1.56898e+00 164 2011 4 5.68853e+01 2.08717e+00 96 2011 5 6.18632e+01 8.18716e-01 141 2011 6 6.33701e+01 1.98731e-01 109 2011 7 6.25636e+01 7.66914e-01 108 2011 8 5.71824e+01 1.53353e+00 112 2011 9 5.10858e+01 2.68178e+00 129 2011 10 4.19711e+01 2.85024e+00 332 2011 11 3.38453e+01 2.32825e+00 221 2011 12 2.89782e+01 5.58851e-01 144 2012 1 3.10847e+01 1.65177e+00 206 2012 2 3.81321e+01 4.27069e-01 35 2012 3 4.93958e+01 2.96900e+00 158 2012 4 5.72778e+01 2.27685e+00 185 2012 5 6.19853e+01 8.99123e-01 96 2012 6 6.34119e+01 1.51251e-01 142 2012 7 6.26780e+01 6.06859e-01 54 2012 8 5.79106e+01 8.81870e-01 60 2012 9 5.11574e+01 2.14725e+00 159 2012 10 4.14885e+01 2.88216e+00 296 2012 11 3.35569e+01 2.09429e+00 295 2012 12 2.90183e+01 4.17383e-01 171 2013 1 3.24712e+01 1.77052e+00 128 2013 2 3.85985e+01 2.83143e+00 96 2013 3 4.94265e+01 3.02717e+00 182 2013 4 5.66920e+01 1.86382e+00 76 2013 5 6.13239e+01 7.67875e-01 96 2013 6 6.33221e+01 2.13749e-01 30 2013 7 6.30718e+01 3.79825e-01 83 2013 8 5.70346e+01 1.23662e+00 95 2013 9 5.14050e+01 2.62940e+00 192 2013 10 4.25261e+01 2.56126e+00 207 2013 11 3.35614e+01 2.31426e+00 206 2013 12 2.89354e+01 4.68939e-01 112 2014 1 3.16691e+01 1.34060e+00 160 2014 2 3.91670e+01 2.73349e+00 112 2014 3 4.92247e+01 3.10988e+00 112 2014 4 5.79448e+01 1.28794e+00 88 2014 5 6.20842e+01 5.11917e-01 86 2014 6 6.33759e+01 1.77492e-01 68 2014 7 6.30817e+01 7.15433e-01 80 2014 8 5.78039e+01 1.31976e+00 96 2014 9 5.12037e+01 2.02099e+00 144 2014 10 4.14325e+01 2.61479e+00 324 2014 11 3.32382e+01 2.20431e+00 224 2014 12 2.90421e+01 4.78705e-01 173 2015 1 3.25455e+01 1.55956e+00 208 2015 2 3.82121e+01 1.73224e+00 184 2015 3 5.01179e+01 2.78430e+00 112 2015 4 5.56187e+01 2.22704e+00 49 2015 5 6.15868e+01 1.12816e+00 114 2015 6 6.33093e+01 1.33277e-01 141 2015 7 6.28568e+01 5.25569e-01 66 2015 8 5.74930e+01 2.03810e+00 128 2015 9 5.11568e+01 2.15837e+00 112 2015 10 4.21163e+01 1.94040e+00 181 2015 11 3.21920e+01 1.70564e+00 165 2015 12 2.91059e+01 3.22663e-01 126 2016 1 3.12062e+01 1.62677e+00 144 2016 2 3.95775e+01 2.59593e+00 256 2016 3 4.85111e+01 2.72207e+00 129 2016 4 5.67393e+01 1.85546e+00 124 2016 5 6.18186e+01 8.01232e-01 169 2016 6 6.35108e+01 6.91038e-02 98 2016 7 6.31752e+01 3.57854e-01 109 2016 8 5.71436e+01 7.71921e-01 96 2016 9 4.95829e+01 1.97536e+00 189 2016 10 4.16791e+01 2.86362e+00 271 2016 11 3.32944e+01 1.74747e+00 176 2016 12 2.90358e+01 5.46378e-01 96 2017 1 3.20433e+01 1.91359e+00 192 2017 2 3.94795e+01 2.70269e+00 216 2017 3 5.00415e+01 2.40922e+00 189 2017 4 5.63971e+01 1.69782e+00 128 2017 5 6.16440e+01 7.78169e-01 160 2017 6 6.33923e+01 5.73607e-02 80 2017 7 6.32049e+01 4.03196e-01 95 2017 8 5.82152e+01 9.39930e-01 64 2017 9 4.94624e+01 2.07792e+00 175 2017 10 4.12344e+01 2.70206e+00 252 2017 11 3.30722e+01 1.88764e+00 256 2017 12 2.89807e+01 4.50649e-01 206 2018 1 3.14135e+01 1.84439e+00 224 2018 2 3.86565e+01 2.44029e+00 107 2018 3 4.85176e+01 2.79323e+00 145 2018 4 5.66541e+01 1.70514e+00 128 2018 5 6.13112e+01 9.10680e-01 116 2018 6 6.32796e+01 1.01429e-01 78 2018 7 6.28822e+01 5.52609e-01 76 2018 8 5.80727e+01 1.66650e+00 64 2018 9 5.19450e+01 2.08627e+00 176 2018 10 4.14920e+01 3.05746e+00 192 2018 11 3.40025e+01 1.61297e+00 85 2018 12 2.91299e+01 4.75596e-01 80 2019 1 3.16099e+01 1.75892e+00 224 2019 2 3.97059e+01 2.75994e+00 48 2019 3 4.98836e+01 3.15384e+00 178 2019 4 5.83989e+01 1.20349e+00 128 2019 5 6.19135e+01 7.92420e-01 155 2019 6 6.34163e+01 8.26577e-02 64 2019 7 6.27292e+01 6.64122e-01 111 2019 8 5.82414e+01 2.01445e+00 60 2019 9 5.06764e+01 2.53780e+00 280 2019 10 4.28781e+01 2.83694e+00 107 2019 11 3.38693e+01 2.16356e+00 144 2019 12 2.91018e+01 5.20622e-01 136 2020 1 3.14475e+01 1.79075e+00 111 2020 2 3.90803e+01 3.33142e+00 120 2020 3 4.94819e+01 2.60420e+00 115 2020 4 5.69480e+01 2.07080e+00 132 2020 5 6.15223e+01 8.10500e-01 98 2020 6 6.35828e+01 1.09571e-01 96 2020 7 6.30282e+01 4.78152e-01 80 2020 8 5.98768e+01 7.92050e-01 112 2020 9 5.01766e+01 3.02573e+00 53 2020 10 4.06632e+01 2.41760e+00 180 2020 11 3.35213e+01 1.90787e+00 240 2020 12 2.89652e+01 3.85599e-01 200 2021 1 3.12111e+01 1.89404e+00 159 2021 2 4.01718e+01 2.34555e+00 128 2021 3 4.65913e+01 1.47491e+00 94 2021 4 5.67128e+01 2.31462e+00 177 2021 5 6.20290e+01 9.05937e-01 80 2021 6 6.33992e+01 1.22489e-01 37 2021 7 6.25536e+01 3.54895e-01 30 2021 8 5.90316e+01 1.00031e+00 80 2021 9 5.06063e+01 2.84970e+00 111 2021 10 4.18042e+01 2.02915e+00 129 2021 11 3.26930e+01 1.69368e+00 259 2021 12 2.91057e+01 5.51784e-01 119 2022 1 3.20715e+01 1.63897e+00 165 2022 2 3.95958e+01 2.47349e+00 192 2022 3 4.83154e+01 2.97289e+00 192 2022 4 5.93040e+01 4.27954e-01 48 2022 5 6.18464e+01 8.62799e-01 128 2022 6 6.33778e+01 1.02061e-01 80 2022 7 6.29221e+01 8.37038e-01 140 2022 8 5.70804e+01 2.01540e+00 111 2022 9 4.98639e+01 1.93314e+00 208 2022 10 4.26142e+01 2.64786e+00 304 2022 11 3.39690e+01 1.97719e+00 196 2022 12 2.89354e+01 5.06564e-01 129 2023 1 3.11985e+01 1.82894e+00 178 2023 2 3.82499e+01 2.62493e+00 159 2023 3 4.75314e+01 2.71843e+00 74 2023 4 5.85414e+01 4.71224e-01 64 2023 5 6.18168e+01 8.27013e-01 96 2023 6 6.34088e+01 8.81939e-02 64 2023 7 6.25382e+01 6.73514e-01 118 2023 8 5.83071e+01 1.64086e+00 176 2023 9 5.04410e+01 2.16103e+00 144 2023 10 4.14275e+01 2.96613e+00 224 2023 11 3.41903e+01 2.28736e+00 144 2023 12 2.87417e+01 2.19692e-01 130 2024 1 3.13867e+01 1.73121e+00 80 2024 2 4.00274e+01 2.17219e+00 128 2024 3 5.01053e+01 2.46620e+00 95 2024 4 5.46531e+01 3.18134e-01 32