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 6.16276e+01 6.77147e-01 176 2002 8 5.67523e+01 8.36197e-01 69 2002 9 4.92718e+01 2.14411e+00 64 2002 10 4.34647e+01 2.12780e+00 120 2002 11 3.38770e+01 2.25203e+00 144 2002 12 2.95468e+01 5.21461e-01 150 2003 1 3.17087e+01 1.42340e+00 240 2003 2 3.86540e+01 2.47635e+00 188 2003 3 5.04135e+01 1.87392e+00 144 2003 4 5.72568e+01 1.85524e+00 160 2003 5 6.15817e+01 1.19850e+00 48 2003 6 nan nan 0 2003 7 6.12585e+01 5.02692e-01 30 2003 8 5.81977e+01 1.33965e+00 47 2003 9 5.06025e+01 2.26646e+00 112 2003 10 4.13010e+01 2.21526e+00 192 2003 11 3.42535e+01 2.27136e+00 221 2003 12 2.94400e+01 3.85695e-01 215 2004 1 3.25967e+01 1.55794e+00 96 2004 2 4.08440e+01 2.18397e+00 80 2004 3 4.99647e+01 2.27671e+00 220 2004 4 5.68104e+01 2.08564e+00 176 2004 5 6.15873e+01 7.27212e-01 128 2004 6 6.31720e+01 9.00360e-02 48 2004 7 6.20365e+01 5.13591e-01 69 2004 8 5.82860e+01 1.55165e+00 112 2004 9 5.07548e+01 2.35332e+00 191 2004 10 4.29658e+01 2.16158e+00 116 2004 11 3.39086e+01 2.55560e+00 80 2004 12 2.91862e+01 1.63242e-01 137 2005 1 3.19562e+01 1.45792e+00 160 2005 2 3.96399e+01 1.83773e+00 111 2005 3 4.74183e+01 2.17747e+00 156 2005 4 5.69685e+01 1.37004e+00 141 2005 5 6.19479e+01 7.43158e-01 112 2005 6 6.33042e+01 1.40020e-01 206 2005 7 6.16772e+01 7.72678e-01 134 2005 8 5.70714e+01 1.91641e+00 64 2005 9 5.17546e+01 2.49317e+00 175 2005 10 4.14896e+01 2.11119e+00 288 2005 11 3.26712e+01 2.04664e+00 147 2005 12 2.93148e+01 4.80571e-01 126 2006 1 3.23679e+01 1.92555e+00 112 2006 2 3.98834e+01 2.89120e+00 160 2006 3 4.93815e+01 2.96666e+00 213 2006 4 5.71241e+01 1.66760e+00 160 2006 5 6.17810e+01 8.77734e-01 159 2006 6 6.32368e+01 1.38047e-01 176 2006 7 6.11691e+01 3.71037e-01 45 2006 8 5.77358e+01 1.55057e+00 152 2006 9 5.03916e+01 2.83698e+00 144 2006 10 4.28577e+01 2.94300e+00 200 2006 11 3.37743e+01 2.15433e+00 256 2006 12 2.96835e+01 5.43443e-01 160 2007 1 3.12444e+01 1.30897e+00 80 2007 2 3.92944e+01 2.09978e+00 113 2007 3 4.81241e+01 2.37029e+00 179 2007 4 5.82178e+01 1.48954e+00 160 2007 5 6.17835e+01 9.79616e-01 80 2007 6 6.32104e+01 1.13993e-01 99 2007 7 6.24486e+01 5.04311e-01 80 2007 8 5.63761e+01 2.58074e-01 32 2007 9 5.06667e+01 2.18401e+00 113 2007 10 4.19618e+01 3.15170e+00 190 2007 11 3.48237e+01 1.89021e+00 192 2007 12 2.95038e+01 2.87035e-01 112 2008 1 3.16221e+01 2.12853e+00 106 2008 2 4.00517e+01 2.95389e+00 228 2008 3 4.98292e+01 2.69187e+00 128 2008 4 5.89393e+01 1.25140e+00 96 2008 5 6.19175e+01 8.92521e-01 110 2008 6 6.32386e+01 1.43221e-01 134 2008 7 6.21475e+01 3.13694e-01 33 2008 8 5.60971e+01 7.16470e-01 96 2008 9 4.99551e+01 2.62841e+00 147 2008 10 4.05925e+01 2.78269e+00 128 2008 11 3.37829e+01 1.94030e+00 299 2008 12 2.94722e+01 4.79688e-01 208 2009 1 3.16781e+01 1.71133e+00 176 2009 2 3.90420e+01 2.84731e+00 128 2009 3 4.84556e+01 2.76787e+00 147 2009 4 5.75474e+01 1.43746e+00 80 2009 5 6.22948e+01 6.10606e-01 72 2009 6 6.32212e+01 7.95279e-02 131 2009 7 6.21367e+01 6.85447e-01 44 2009 8 5.82697e+01 1.55427e+00 128 2009 9 4.94259e+01 1.85022e+00 106 2009 10 4.21509e+01 2.31025e+00 139 2009 11 3.40739e+01 2.14911e+00 144 2009 12 2.92525e+01 1.44371e-01 89 2010 1 3.14846e+01 1.58438e+00 176 2010 2 4.06111e+01 2.38708e+00 130 2010 3 4.86139e+01 2.64535e+00 144 2010 4 5.76129e+01 1.89248e+00 157 2010 5 6.19462e+01 8.12549e-01 124 2010 6 6.30801e+01 9.12602e-02 144 2010 7 6.18520e+01 9.45131e-01 64 2010 8 5.82060e+01 1.46283e+00 96 2010 9 5.07618e+01 2.39336e+00 144 2010 10 4.27255e+01 2.62237e+00 338 2010 11 3.43634e+01 1.83563e+00 208 2010 12 2.95517e+01 4.55744e-01 194 2011 1 3.14622e+01 1.39418e+00 176 2011 2 4.10361e+01 1.89873e+00 192 2011 3 4.99386e+01 1.37977e+00 160 2011 4 5.71956e+01 2.04105e+00 124 2011 5 6.17683e+01 8.46466e-01 165 2011 6 6.32647e+01 1.70480e-01 112 2011 7 6.16988e+01 7.71033e-01 112 2011 8 5.72508e+01 1.53813e+00 171 2011 9 5.11212e+01 2.22140e+00 206 2011 10 4.15212e+01 2.72737e+00 256 2011 11 3.30358e+01 2.26206e+00 112 2011 12 2.94244e+01 5.85518e-01 80 2012 1 3.17947e+01 1.85177e+00 207 2012 2 3.98337e+01 1.39295e+00 32 2012 3 4.93588e+01 3.06921e+00 208 2012 4 5.73357e+01 1.94977e+00 154 2012 5 6.22457e+01 7.16122e-01 175 2012 6 6.32403e+01 1.09760e-01 159 2012 7 6.09331e+01 2.84013e-01 32 2012 8 5.68786e+01 6.74865e-01 58 2012 9 5.09940e+01 2.47747e+00 173 2012 10 4.16851e+01 2.59794e+00 272 2012 11 3.38800e+01 2.07675e+00 223 2012 12 2.94789e+01 4.32152e-01 108 2013 1 3.38016e+01 1.10755e+00 112 2013 2 3.87754e+01 2.09676e+00 112 2013 3 5.00328e+01 2.99583e+00 176 2013 4 5.69019e+01 1.74403e+00 80 2013 5 6.17141e+01 7.71209e-01 112 2013 6 6.31406e+01 1.48653e-01 80 2013 7 6.17106e+01 8.10570e-01 112 2013 8 5.62148e+01 6.82595e-01 64 2013 9 5.13121e+01 2.53105e+00 159 2013 10 4.16597e+01 2.32516e+00 112 2013 11 3.36806e+01 2.45887e+00 127 2013 12 2.95392e+01 5.43414e-01 127 2014 1 3.17664e+01 1.51520e+00 176 2014 2 3.94590e+01 1.61127e+00 160 2014 3 5.01665e+01 3.06219e+00 144 2014 4 5.70535e+01 1.60053e+00 116 2014 5 6.20542e+01 6.76246e-01 98 2014 6 6.31331e+01 8.37867e-02 87 2014 7 6.21065e+01 8.61698e-01 80 2014 8 5.78137e+01 1.46100e+00 128 2014 9 5.19860e+01 1.78056e+00 112 2014 10 4.16815e+01 2.67040e+00 309 2014 11 3.37832e+01 2.15649e+00 208 2014 12 2.95517e+01 4.03807e-01 114 2015 1 3.33135e+01 1.40810e+00 144 2015 2 3.83863e+01 1.56270e+00 192 2015 3 5.04685e+01 2.46932e+00 144 2015 4 5.58616e+01 2.06933e+00 84 2015 5 6.14713e+01 1.07268e+00 144 2015 6 6.31189e+01 1.41794e-01 144 2015 7 6.15126e+01 3.52638e-01 48 2015 8 5.75635e+01 1.62095e+00 160 2015 9 5.17161e+01 2.35047e+00 148 2015 10 4.29621e+01 1.55543e+00 148 2015 11 3.34581e+01 1.81707e+00 112 2015 12 2.96474e+01 3.81687e-01 80 2016 1 3.22756e+01 1.67700e+00 160 2016 2 3.92651e+01 2.56722e+00 240 2016 3 4.85244e+01 3.10273e+00 71 2016 4 5.72347e+01 1.96582e+00 160 2016 5 6.20638e+01 8.41919e-01 192 2016 6 6.32707e+01 7.03997e-02 112 2016 7 6.22232e+01 5.10433e-01 78 2016 8 5.74169e+01 1.09724e+00 121 2016 9 4.88468e+01 1.45957e+00 112 2016 10 4.20178e+01 2.73097e+00 272 2016 11 3.36956e+01 1.87859e+00 211 2016 12 2.94849e+01 4.62159e-01 179 2017 1 3.25110e+01 1.86614e+00 190 2017 2 3.96799e+01 2.61400e+00 224 2017 3 5.05528e+01 1.94264e+00 139 2017 4 5.60597e+01 1.43295e+00 95 2017 5 6.18173e+01 8.05390e-01 160 2017 6 6.31725e+01 7.50048e-02 96 2017 7 6.17859e+01 6.47314e-01 86 2017 8 5.82416e+01 9.63535e-01 82 2017 9 4.93556e+01 1.97038e+00 192 2017 10 4.11615e+01 2.66501e+00 204 2017 11 3.31461e+01 1.67778e+00 192 2017 12 2.93874e+01 3.00060e-01 136 2018 1 3.19240e+01 1.88486e+00 208 2018 2 4.02317e+01 2.18342e+00 112 2018 3 4.88920e+01 3.06763e+00 190 2018 4 5.75884e+01 1.89730e+00 176 2018 5 6.14345e+01 6.96246e-01 147 2018 6 6.30544e+01 9.13086e-02 80 2018 7 6.15848e+01 5.84125e-01 144 2018 8 5.84898e+01 1.28884e+00 112 2018 9 5.10855e+01 1.80288e+00 116 2018 10 4.13192e+01 2.66818e+00 162 2018 11 3.31818e+01 1.34197e+00 64 2018 12 2.95879e+01 4.18802e-01 80 2019 1 3.13536e+01 1.68063e+00 128 2019 2 3.96296e+01 2.17049e+00 48 2019 3 5.02458e+01 2.78052e+00 192 2019 4 5.87710e+01 1.32788e+00 143 2019 5 6.18165e+01 8.57700e-01 133 2019 6 6.32991e+01 1.05587e-01 66 2019 7 6.20818e+01 8.14032e-01 80 2019 8 5.73675e+01 1.71420e+00 80 2019 9 5.12673e+01 2.33297e+00 224 2019 10 4.38911e+01 2.76064e+00 112 2019 11 3.34303e+01 2.21460e+00 162 2019 12 2.96821e+01 5.02146e-01 176 2020 1 3.20188e+01 1.77034e+00 136 2020 2 3.93712e+01 3.08106e+00 112 2020 3 5.04827e+01 2.37229e+00 109 2020 4 5.74422e+01 2.09365e+00 143 2020 5 6.10572e+01 4.56934e-01 99 2020 6 6.33930e+01 5.74426e-02 77 2020 7 6.18983e+01 4.99759e-01 96 2020 8 5.94543e+01 6.27052e-01 98 2020 9 5.11561e+01 3.12804e+00 105 2020 10 4.22425e+01 2.08048e+00 144 2020 11 3.44556e+01 1.64284e+00 193 2020 12 2.95319e+01 4.21089e-01 224 2021 1 3.18557e+01 1.93050e+00 128 2021 2 3.96196e+01 2.85919e+00 94 2021 3 4.77838e+01 1.63842e+00 144 2021 4 5.74480e+01 2.29726e+00 160 2021 5 6.17186e+01 1.11980e+00 75 2021 6 6.29505e+01 9.83923e-02 32 2021 7 6.12539e+01 8.29659e-01 80 2021 8 5.81708e+01 1.22950e+00 65 2021 9 5.12370e+01 2.58487e+00 135 2021 10 4.22194e+01 2.38044e+00 151 2021 11 3.42119e+01 1.93463e+00 180 2021 12 2.93515e+01 4.33903e-01 132 2022 1 3.27055e+01 1.85774e+00 160 2022 2 3.99891e+01 2.28838e+00 220 2022 3 4.93508e+01 3.21684e+00 192 2022 4 5.92061e+01 7.42353e-01 96 2022 5 6.18400e+01 7.52127e-01 113 2022 6 6.32632e+01 1.09617e-01 128 2022 7 6.13535e+01 7.16918e-01 87 2022 8 5.66997e+01 1.76857e+00 106 2022 9 5.04232e+01 2.16475e+00 259 2022 10 4.32307e+01 2.18051e+00 256 2022 11 3.41116e+01 2.13286e+00 160 2022 12 2.95181e+01 4.87145e-01 114 2023 1 3.14475e+01 1.73183e+00 224 2023 2 3.89400e+01 2.09564e+00 128 2023 3 4.81207e+01 2.90956e+00 112 2023 4 5.79989e+01 1.65695e+00 60 2023 5 6.20361e+01 7.68068e-01 176 2023 6 6.32211e+01 8.68993e-02 144 2023 7 6.15224e+01 8.08497e-01 143 2023 8 5.81612e+01 1.54027e+00 192 2023 9 5.17904e+01 1.68232e+00 160 2023 10 4.17276e+01 2.99005e+00 192 2023 11 3.39124e+01 1.95593e+00 145 2023 12 2.92219e+01 2.07382e-01 128 2024 1 3.19441e+01 1.59582e+00 79 2024 2 4.11976e+01 2.13407e+00 96 2024 3 4.97180e+01 3.18907e+00 96 2024 4 5.47930e+01 3.41754e-01 32