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 6.19698e+01 1.02038e-01 40 2002 8 5.68321e+01 5.11465e-01 68 2002 9 5.00627e+01 2.69701e+00 94 2002 10 4.34495e+01 1.95980e+00 122 2002 11 3.33784e+01 1.94299e+00 172 2002 12 2.93926e+01 5.55099e-01 191 2003 1 3.13998e+01 1.43135e+00 227 2003 2 3.96047e+01 2.36626e+00 160 2003 3 5.07249e+01 4.68884e-03 16 2003 4 nan nan 0 2003 5 6.29310e+01 2.73841e-03 16 2003 6 6.30744e+01 1.05900e-01 43 2003 7 nan nan 0 2003 8 5.65816e+01 1.61158e+00 56 2003 9 5.19729e+01 2.15573e+00 102 2003 10 4.17141e+01 2.20456e+00 143 2003 11 3.37304e+01 2.10311e+00 119 2003 12 2.91990e+01 4.08739e-01 160 2004 1 3.16332e+01 1.40930e+00 116 2004 2 4.09273e+01 2.23301e+00 80 2004 3 4.82277e+01 2.47370e+00 126 2004 4 5.81430e+01 1.85139e+00 92 2004 5 6.22460e+01 7.73813e-01 64 2004 6 6.29146e+01 7.62788e-02 64 2004 7 6.18596e+01 7.86400e-01 90 2004 8 5.63932e+01 1.17429e+00 83 2004 9 4.83977e+01 1.59051e+00 48 2004 10 4.26249e+01 2.44196e+00 85 2004 11 3.10554e+01 8.52294e-01 54 2004 12 2.90334e+01 2.10319e-01 84 2005 1 3.26455e+01 1.31015e+00 139 2005 2 3.91166e+01 2.04686e+00 118 2005 3 4.83512e+01 2.91289e+00 144 2005 4 5.57667e+01 2.06551e-01 22 2005 5 6.19913e+01 1.22570e-02 3 2005 6 6.29251e+01 1.92142e-01 55 2005 7 6.17618e+01 5.60414e-01 36 2005 8 5.84011e+01 8.03524e-01 32 2005 9 4.80214e+01 4.76881e-01 32 2005 10 4.13640e+01 2.48896e+00 201 2005 11 3.40013e+01 1.98544e+00 258 2005 12 2.93319e+01 5.50384e-01 203 2006 1 3.17530e+01 1.80120e+00 170 2006 2 3.93850e+01 2.01260e+00 129 2006 3 4.81319e+01 2.68894e+00 173 2006 4 5.62284e+01 2.03167e+00 134 2006 5 6.17294e+01 8.45841e-01 127 2006 6 6.29220e+01 4.69522e-02 77 2006 7 6.16922e+01 6.86868e-01 70 2006 8 5.82370e+01 1.52611e+00 112 2006 9 5.02613e+01 2.54323e+00 164 2006 10 4.20342e+01 2.85591e+00 224 2006 11 3.40283e+01 2.09490e+00 202 2006 12 2.93255e+01 4.52366e-01 128 2007 1 3.16272e+01 1.88022e+00 118 2007 2 4.01377e+01 2.32831e+00 208 2007 3 4.84328e+01 2.72826e+00 151 2007 4 5.69881e+01 2.18822e+00 132 2007 5 6.11241e+01 1.10665e+00 51 2007 6 6.29052e+01 1.47218e-01 32 2007 7 6.13889e+01 8.04193e-01 51 2007 8 5.71356e+01 1.74402e+00 65 2007 9 4.98929e+01 2.19250e+00 140 2007 10 4.27833e+01 2.15440e+00 144 2007 11 3.38229e+01 2.03855e+00 272 2007 12 2.94476e+01 4.76605e-01 112 2008 1 3.21030e+01 2.00815e+00 147 2008 2 3.98101e+01 3.30583e+00 207 2008 3 4.94457e+01 3.07412e+00 211 2008 4 5.72528e+01 1.99067e+00 124 2008 5 6.22870e+01 5.84120e-01 101 2008 6 6.29227e+01 2.58193e-01 75 2008 7 6.16394e+01 6.46055e-01 29 2008 8 5.94445e+01 1.14635e-03 15 2008 9 5.00291e+01 1.70245e+00 73 2008 10 4.17270e+01 2.96171e+00 176 2008 11 3.35518e+01 1.85128e+00 192 2008 12 2.95236e+01 5.69137e-01 172 2009 1 3.18749e+01 1.78420e+00 179 2009 2 3.92728e+01 2.65672e+00 176 2009 3 4.70205e+01 2.04373e+00 172 2009 4 5.68558e+01 2.25242e+00 70 2009 5 6.15590e+01 1.10650e+00 39 2009 6 6.29291e+01 1.69518e-01 34 2009 7 6.18510e+01 7.12731e-01 48 2009 8 5.74341e+01 1.47153e+00 78 2009 9 5.00003e+01 1.85508e+00 116 2009 10 4.21109e+01 2.95576e+00 193 2009 11 3.32001e+01 1.75970e+00 101 2009 12 2.90849e+01 1.30425e-01 32 2010 1 3.13283e+01 1.34221e+00 100 2010 2 3.94061e+01 1.45533e+00 30 2010 3 4.76342e+01 3.20839e+00 89 2010 4 5.60113e+01 8.55830e-01 48 2010 5 6.15757e+01 9.73944e-01 48 2010 6 6.28421e+01 6.43252e-02 52 2010 7 6.14266e+01 8.61470e-01 45 2010 8 5.80222e+01 8.30811e-01 21 2010 9 5.01091e+01 2.43610e+00 98 2010 10 4.20837e+01 2.71290e+00 295 2010 11 3.38277e+01 2.04716e+00 255 2010 12 2.94821e+01 4.96492e-01 256 2011 1 3.20021e+01 1.82177e+00 167 2011 2 4.09160e+01 1.72177e+00 196 2011 3 4.86687e+01 1.98386e+00 160 2011 4 5.63227e+01 1.71707e+00 144 2011 5 6.20524e+01 6.78012e-01 132 2011 6 6.30421e+01 9.79287e-02 39 2011 7 6.07842e+01 6.90041e-01 47 2011 8 5.69294e+01 1.10626e+00 95 2011 9 5.08480e+01 2.25081e+00 150 2011 10 4.20013e+01 2.99307e+00 221 2011 11 3.41089e+01 2.28599e+00 232 2011 12 2.93578e+01 5.21000e-01 208 2012 1 3.15453e+01 1.82083e+00 269 2012 2 3.96254e+01 1.55000e+00 77 2012 3 4.97074e+01 2.49757e+00 200 2012 4 5.83551e+01 1.15267e+00 123 2012 5 6.16254e+01 9.47604e-01 112 2012 6 6.29636e+01 1.96038e-03 10 2012 7 6.16163e+01 3.38714e-01 40 2012 8 5.98978e+01 1.71454e-03 16 2012 9 5.35466e+01 1.91716e-03 14 2012 10 4.21854e+01 1.47114e+00 10 2012 11 3.41918e+01 2.25934e+00 214 2012 12 2.95070e+01 3.95872e-01 128 2013 1 3.32347e+01 1.25619e+00 106 2013 2 3.94361e+01 2.65758e+00 106 2013 3 4.68758e+01 1.61289e+00 99 2013 4 5.75308e+01 1.93673e+00 66 2013 5 nan nan 0 2013 6 6.29329e+01 5.13319e-02 51 2013 7 6.14840e+01 0.00000e+00 2 2013 8 nan nan 0 2013 9 5.00944e+01 2.20107e+00 62 2013 10 4.21957e+01 2.91061e+00 132 2013 11 3.43564e+01 2.22940e+00 105 2013 12 2.92473e+01 3.94707e-01 100 2014 1 3.15607e+01 4.77384e-01 64 2014 2 4.07873e+01 2.04591e+00 95 2014 3 4.82043e+01 1.90481e+00 142 2014 4 5.44246e+01 1.83273e-03 16 2014 5 6.14160e+01 0.00000e+00 1 2014 6 6.27537e+01 1.84138e-02 19 2014 7 6.16351e+01 7.02035e-01 94 2014 8 5.74844e+01 1.81604e+00 97 2014 9 5.17109e+01 1.95915e+00 112 2014 10 4.16547e+01 2.43816e+00 322 2014 11 3.32660e+01 2.20562e+00 224 2014 12 2.94964e+01 3.64720e-01 184 2015 1 3.26603e+01 1.85996e+00 195 2015 2 3.85728e+01 2.09554e+00 153 2015 3 4.96653e+01 2.83319e+00 78 2015 4 5.76387e+01 2.47973e+00 35 2015 5 6.21753e+01 7.49829e-01 85 2015 6 6.28799e+01 1.52772e-01 133 2015 7 6.21490e+01 4.61262e-01 46 2015 8 5.74393e+01 1.43802e+00 71 2015 9 5.23792e+01 1.99802e+00 101 2015 10 4.15836e+01 2.13290e+00 156 2015 11 3.38171e+01 1.60266e+00 160 2015 12 2.93241e+01 3.41437e-01 137 2016 1 3.22910e+01 1.33452e+00 192 2016 2 3.98907e+01 2.49170e+00 304 2016 3 4.80278e+01 2.92137e+00 152 2016 4 5.76668e+01 1.58607e+00 101 2016 5 6.16961e+01 1.05228e+00 59 2016 6 6.28692e+01 1.10332e-01 112 2016 7 6.15739e+01 7.53183e-01 122 2016 8 5.73296e+01 1.22511e+00 144 2016 9 5.03486e+01 2.62078e+00 131 2016 10 4.20121e+01 2.52021e+00 153 2016 11 3.35978e+01 2.06042e+00 179 2016 12 2.92284e+01 4.50251e-01 190 2017 1 3.18549e+01 1.82581e+00 160 2017 2 3.98419e+01 2.94046e+00 240 2017 3 4.90514e+01 2.45476e+00 192 2017 4 5.67940e+01 1.89357e+00 134 2017 5 6.22911e+01 6.07688e-01 59 2017 6 6.27935e+01 2.12895e-01 38 2017 7 6.22742e+01 9.42481e-02 10 2017 8 5.74973e+01 1.38558e+00 96 2017 9 5.05065e+01 2.34320e+00 85 2017 10 4.10613e+01 2.36113e+00 247 2017 11 3.35319e+01 2.26223e+00 229 2017 12 2.93838e+01 4.00984e-01 176 2018 1 3.20678e+01 1.68602e+00 213 2018 2 4.02853e+01 2.49325e+00 128 2018 3 4.77739e+01 2.55639e+00 157 2018 4 5.75975e+01 2.74330e+00 46 2018 5 6.13754e+01 1.00425e+00 79 2018 6 6.29255e+01 7.40045e-02 30 2018 7 6.06521e+01 3.62961e-02 17 2018 8 5.68554e+01 1.52531e+00 32 2018 9 4.96901e+01 1.84019e+00 120 2018 10 4.13597e+01 2.64031e+00 249 2018 11 3.30710e+01 1.63660e+00 68 2018 12 2.93942e+01 4.26420e-01 90 2019 1 3.12658e+01 1.43880e+00 26 2019 2 4.12008e+01 2.25144e+00 50 2019 3 4.80172e+01 2.79387e+00 123 2019 4 5.69778e+01 1.57250e+00 67 2019 5 6.18377e+01 8.15387e-01 112 2019 6 6.29669e+01 1.72938e-01 48 2019 7 6.20920e+01 1.02227e+00 57 2019 8 5.76708e+01 6.89924e-01 55 2019 9 4.88047e+01 1.17603e+00 43 2019 10 4.21118e+01 3.03389e+00 110 2019 11 3.38617e+01 1.94445e+00 144 2019 12 2.92457e+01 4.07280e-01 80 2020 1 3.13273e+01 1.55736e+00 163 2020 2 4.01021e+01 3.48105e+00 135 2020 3 4.86042e+01 2.54872e+00 127 2020 4 5.68275e+01 2.69089e+00 51 2020 5 6.13963e+01 9.07480e-01 113 2020 6 6.28080e+01 0.00000e+00 1 2020 7 6.09957e+01 3.95090e-01 20 2020 8 nan nan 0 2020 9 5.09145e+01 1.48973e+00 25 2020 10 4.03824e+01 2.14179e+00 106 2020 11 3.32942e+01 1.63642e+00 124 2020 12 2.93279e+01 4.40860e-01 116 2021 1 3.15261e+01 1.97966e+00 64 2021 2 4.13685e+01 1.97565e+00 75 2021 3 4.98907e+01 1.92378e+00 27 2021 4 5.84440e+01 0.00000e+00 4 2021 5 6.25302e+01 2.02320e-01 32 2021 6 6.28883e+01 9.19848e-02 33 2021 7 nan nan 0 2021 8 5.54352e+01 1.60065e-03 5 2021 9 4.92816e+01 6.34100e-01 58 2021 10 4.07643e+01 2.86777e+00 55 2021 11 3.29788e+01 1.91303e+00 83 2021 12 2.90960e+01 3.19425e-01 79 2022 1 3.23724e+01 1.95673e+00 162 2022 2 4.04050e+01 2.41551e+00 176 2022 3 4.63982e+01 1.37606e+00 92 2022 4 5.99173e+01 1.39118e-03 16 2022 5 6.02402e+01 7.42816e-01 24 2022 6 6.29383e+01 2.53199e-02 24 2022 7 6.12537e+01 2.54556e-01 32 2022 8 5.63581e+01 1.38648e+00 69 2022 9 5.01910e+01 3.25196e+00 38 2022 10 3.92565e+01 1.19133e+00 59 2022 11 3.50190e+01 1.19604e+00 62 2022 12 2.91392e+01 3.45683e-01 130 2023 1 3.17819e+01 1.52326e+00 204 2023 2 3.89676e+01 2.52067e+00 133 2023 3 4.97187e+01 2.34317e+00 43 2023 4 5.79208e+01 1.73353e+00 31 2023 5 6.05865e+01 3.09607e-01 67 2023 6 6.28757e+01 1.59701e-01 63 2023 7 nan nan 0 2023 8 5.82771e+01 1.70137e+00 46 2023 9 5.07207e+01 4.82274e-01 25 2023 10 4.11664e+01 2.30442e+00 60 2023 11 3.45239e+01 2.06496e+00 112 2023 12 2.89125e+01 1.38277e-01 4 2024 1 nan nan 0 2024 2 4.09391e+01 2.15137e+00 95 2024 3 4.92940e+01 2.88580e+00 96 2024 4 nan nan 0