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 6.20610e+01 2.17861e-01 70 2002 8 5.79028e+01 2.38174e-01 34 2002 9 5.22674e+01 1.96414e+00 112 2002 10 4.44600e+01 2.79057e+00 201 2002 11 3.76098e+01 1.56146e+00 116 2002 12 3.30184e+01 4.08836e-01 105 2003 1 3.54490e+01 1.28211e+00 160 2003 2 4.15126e+01 1.96808e+00 128 2003 3 5.18385e+01 2.37324e+00 109 2003 4 5.76536e+01 8.54937e-01 63 2003 5 6.19694e+01 3.50246e-01 73 2003 6 6.21461e+01 2.95541e-03 16 2003 7 6.14053e+01 1.49497e-02 11 2003 8 5.87100e+01 3.34721e-01 36 2003 9 5.26155e+01 6.75393e-01 42 2003 10 4.46877e+01 2.48756e+00 213 2003 11 3.59005e+01 1.26619e+00 169 2003 12 3.28275e+01 4.23887e-01 127 2004 1 3.58664e+01 1.43999e+00 103 2004 2 4.23196e+01 2.49198e+00 110 2004 3 5.09344e+01 2.92898e+00 93 2004 4 5.84851e+01 1.41524e+00 115 2004 5 6.26356e+01 9.14968e-01 95 2004 6 6.24495e+01 4.02890e-01 147 2004 7 6.21701e+01 5.28961e-01 86 2004 8 5.79910e+01 1.26259e+00 45 2004 9 5.17536e+01 1.88130e+00 109 2004 10 4.37890e+01 2.12272e+00 115 2004 11 3.70349e+01 1.91198e+00 138 2004 12 3.30912e+01 2.95645e-01 128 2005 1 3.64464e+01 1.55252e+00 112 2005 2 4.30810e+01 1.90708e+00 108 2005 3 5.07271e+01 2.83690e+00 108 2005 4 5.83914e+01 1.32165e+00 111 2005 5 6.28343e+01 5.11046e-01 64 2005 6 6.21094e+01 1.02803e-01 20 2005 7 6.23863e+01 2.99527e-01 81 2005 8 5.99378e+01 8.45591e-01 38 2005 9 5.22608e+01 1.78731e+00 99 2005 10 4.61953e+01 1.04821e+00 96 2005 11 3.70941e+01 2.17493e+00 140 2005 12 3.32275e+01 3.51518e-01 176 2006 1 3.44477e+01 1.56003e+00 110 2006 2 4.31772e+01 1.81821e+00 192 2006 3 5.14186e+01 2.43045e+00 139 2006 4 5.78095e+01 1.71469e+00 75 2006 5 6.22845e+01 6.35735e-01 65 2006 6 6.25565e+01 3.97673e-01 48 2006 7 6.15025e+01 2.77660e-01 48 2006 8 5.74764e+01 2.47202e-02 16 2006 9 5.25385e+01 1.62619e+00 93 2006 10 4.40332e+01 1.81697e+00 120 2006 11 3.57215e+01 1.14642e+00 110 2006 12 3.30352e+01 2.57351e-01 59 2007 1 3.61197e+01 1.61817e+00 144 2007 2 4.34288e+01 1.59116e+00 110 2007 3 5.15513e+01 1.79771e+00 71 2007 4 5.79423e+01 1.52076e+00 125 2007 5 6.19507e+01 4.67664e-01 64 2007 6 6.25154e+01 4.63869e-01 96 2007 7 6.19344e+01 5.17350e-01 109 2007 8 5.88028e+01 1.45882e+00 80 2007 9 5.28748e+01 7.07982e-01 32 2007 10 4.63320e+01 1.93991e+00 54 2007 11 3.69733e+01 1.75672e+00 222 2007 12 3.29914e+01 5.75793e-01 232 2008 1 3.61290e+01 1.85295e+00 97 2008 2 4.22054e+01 2.27307e+00 151 2008 3 5.07414e+01 2.56809e+00 49 2008 4 5.88669e+01 1.74566e+00 90 2008 5 6.18382e+01 2.07083e-01 48 2008 6 6.22562e+01 1.24459e-01 57 2008 7 6.15418e+01 6.59207e-01 74 2008 8 5.93960e+01 1.30800e+00 112 2008 9 5.36761e+01 1.53745e+00 31 2008 10 4.51154e+01 2.98328e+00 104 2008 11 3.63140e+01 2.10033e+00 191 2008 12 3.30876e+01 2.49216e-01 136 2009 1 3.59445e+01 1.85062e+00 195 2009 2 4.28197e+01 2.51158e+00 145 2009 3 5.06473e+01 1.77961e+00 126 2009 4 5.90949e+01 1.20039e+00 37 2009 5 6.20404e+01 3.60156e-01 98 2009 6 6.18859e+01 1.34146e-01 16 2009 7 6.21269e+01 9.89201e-04 7 2009 8 6.00017e+01 1.04565e+00 64 2009 9 5.33307e+01 1.38141e+00 48 2009 10 4.44011e+01 2.76324e+00 182 2009 11 3.64431e+01 1.88624e+00 192 2009 12 3.30340e+01 2.40191e-01 112 2010 1 3.55864e+01 1.97431e+00 166 2010 2 4.34115e+01 2.04427e+00 89 2010 3 5.13443e+01 2.54327e+00 142 2010 4 5.77322e+01 2.02787e+00 93 2010 5 6.24598e+01 4.86881e-01 59 2010 6 6.23562e+01 4.23606e-01 104 2010 7 6.15889e+01 5.88340e-01 77 2010 8 5.89315e+01 1.18677e+00 96 2010 9 5.42041e+01 2.05437e+00 44 2010 10 4.55878e+01 2.48814e+00 191 2010 11 3.66980e+01 1.68302e+00 167 2010 12 3.28340e+01 8.57259e-01 264 2011 1 3.58652e+01 2.04142e+00 151 2011 2 4.35282e+01 2.26257e+00 210 2011 3 5.16586e+01 2.30356e+00 198 2011 4 5.77910e+01 1.59389e+00 84 2011 5 6.27628e+01 2.65084e-01 72 2011 6 6.23118e+01 1.33044e-01 80 2011 7 6.17346e+01 5.02660e-01 96 2011 8 nan nan 0 2011 9 5.21128e+01 1.87143e+00 99 2011 10 4.69507e+01 1.86376e+00 110 2011 11 3.72971e+01 1.92544e+00 151 2011 12 3.31861e+01 4.89598e-01 169 2012 1 3.51020e+01 1.46942e+00 192 2012 2 4.47878e+01 1.60759e+00 127 2012 3 5.32367e+01 2.11170e+00 102 2012 4 5.79630e+01 1.64431e+00 75 2012 5 6.22481e+01 6.99693e-01 56 2012 6 6.23023e+01 6.28263e-02 80 2012 7 6.13831e+01 3.96328e-01 63 2012 8 5.88429e+01 1.46012e+00 64 2012 9 5.36302e+01 2.43715e+00 87 2012 10 4.38557e+01 2.51778e+00 158 2012 11 3.72603e+01 1.90442e+00 225 2012 12 3.28977e+01 6.87063e-01 102 2013 1 3.59266e+01 1.87560e+00 158 2013 2 4.21084e+01 2.03488e+00 159 2013 3 5.17922e+01 2.60930e+00 144 2013 4 5.89359e+01 1.50666e+00 80 2013 5 6.23243e+01 3.24677e-01 68 2013 6 6.22425e+01 1.04950e-01 48 2013 7 6.18642e+01 5.51176e-01 96 2013 8 5.94439e+01 1.17594e-01 27 2013 9 5.21330e+01 2.60801e+00 75 2013 10 4.43901e+01 2.30347e+00 258 2013 11 3.72951e+01 1.88189e+00 93 2013 12 3.30620e+01 2.97605e-01 137 2014 1 3.63082e+01 1.50925e+00 160 2014 2 4.22237e+01 1.98761e+00 211 2014 3 5.08200e+01 2.01321e+00 238 2014 4 5.92240e+01 1.97222e+00 94 2014 5 6.21167e+01 5.24305e-01 84 2014 6 6.22522e+01 1.15065e-01 80 2014 7 6.20156e+01 4.50517e-01 32 2014 8 5.89461e+01 1.12986e+00 112 2014 9 5.27745e+01 2.77824e+00 71 2014 10 4.33631e+01 2.20028e+00 148 2014 11 3.69454e+01 2.47690e+00 160 2014 12 3.30337e+01 1.92584e-01 185 2015 1 3.63461e+01 1.69406e+00 144 2015 2 4.31835e+01 1.60737e+00 155 2015 3 5.10242e+01 2.70154e+00 213 2015 4 5.79800e+01 1.21711e+00 69 2015 5 6.21098e+01 6.56875e-01 96 2015 6 6.21937e+01 1.19421e-01 80 2015 7 6.20335e+01 3.76725e-01 92 2015 8 5.96971e+01 1.02179e+00 64 2015 9 5.38727e+01 1.77023e+00 64 2015 10 4.36808e+01 1.72336e+00 39 2015 11 3.76522e+01 1.55624e+00 97 2015 12 3.27394e+01 5.85108e-01 112 2016 1 3.51025e+01 9.32321e-01 22 2016 2 4.39087e+01 2.50350e+00 137 2016 3 5.13465e+01 2.68085e+00 92 2016 4 5.71876e+01 8.27120e-01 64 2016 5 6.24549e+01 4.84998e-01 96 2016 6 6.21066e+01 9.48837e-02 82 2016 7 6.21115e+01 6.11656e-01 84 2016 8 5.89257e+01 9.69239e-01 64 2016 9 5.20480e+01 1.72299e+00 112 2016 10 4.55982e+01 1.60808e+00 96 2016 11 3.61953e+01 1.34497e+00 164 2016 12 3.29679e+01 3.14737e-01 148 2017 1 3.66079e+01 1.92331e+00 152 2017 2 4.21891e+01 1.93266e+00 142 2017 3 5.14525e+01 2.15089e+00 220 2017 4 5.91609e+01 1.60791e+00 80 2017 5 6.23327e+01 7.02093e-01 160 2017 6 6.22866e+01 1.47074e-02 32 2017 7 6.20140e+01 3.25171e-01 112 2017 8 5.89661e+01 1.04428e+00 125 2017 9 5.24674e+01 8.67153e-01 52 2017 10 4.42173e+01 2.15005e+00 114 2017 11 3.67629e+01 2.07067e+00 209 2017 12 3.29120e+01 5.52855e-01 336 2018 1 3.44594e+01 1.60023e+00 110 2018 2 4.26657e+01 2.37720e+00 243 2018 3 5.10876e+01 2.55657e+00 197 2018 4 5.85922e+01 1.66738e+00 115 2018 5 6.16989e+01 1.17257e-02 16 2018 6 6.27569e+01 5.84610e-01 32 2018 7 6.20864e+01 1.80263e-01 64 2018 8 5.94652e+01 7.88997e-01 53 2018 9 5.26208e+01 1.93328e+00 115 2018 10 4.40409e+01 2.03213e+00 135 2018 11 3.80731e+01 1.18215e+00 90 2018 12 3.31148e+01 4.47110e-01 140 2019 1 3.48848e+01 9.03391e-01 184 2019 2 4.25838e+01 2.27487e+00 240 2019 3 5.16268e+01 2.79960e+00 158 2019 4 5.91046e+01 1.67180e+00 96 2019 5 6.23593e+01 8.01857e-01 80 2019 6 6.25605e+01 5.61396e-01 60 2019 7 6.14916e+01 3.75419e-01 80 2019 8 5.93213e+01 3.83773e-01 64 2019 9 5.22891e+01 1.36669e+00 111 2019 10 4.42545e+01 2.74555e+00 161 2019 11 3.68343e+01 1.89640e+00 207 2019 12 3.32330e+01 4.03862e-01 144 2020 1 3.54449e+01 1.96034e+00 185 2020 2 4.23233e+01 2.59066e+00 125 2020 3 5.16268e+01 2.16797e+00 145 2020 4 5.82037e+01 2.10092e+00 92 2020 5 6.22997e+01 7.29247e-01 59 2020 6 6.22022e+01 9.92065e-02 43 2020 7 6.19451e+01 5.83954e-01 64 2020 8 5.86295e+01 1.34100e+00 112 2020 9 5.12879e+01 9.93480e-01 68 2020 10 4.47097e+01 2.34388e+00 111 2020 11 3.54425e+01 1.23218e+00 89 2020 12 3.29148e+01 5.61502e-01 208 2021 1 3.58677e+01 1.53133e+00 208 2021 2 4.29363e+01 2.42219e+00 134 2021 3 5.10978e+01 3.07468e+00 163 2021 4 5.83682e+01 1.46632e+00 80 2021 5 6.22352e+01 7.97922e-01 88 2021 6 6.23161e+01 1.44481e-02 16 2021 7 6.15523e+01 6.17080e-01 80 2021 8 5.84846e+01 1.65302e+00 84 2021 9 5.10596e+01 1.83749e+00 110 2021 10 4.52982e+01 2.42973e+00 93 2021 11 3.54398e+01 1.72479e+00 136 2021 12 3.31063e+01 3.25965e-01 263 2022 1 3.53492e+01 1.24740e+00 90 2022 2 4.27908e+01 2.48908e+00 192 2022 3 4.98963e+01 1.59669e+00 66 2022 4 5.95434e+01 4.11387e-01 28 2022 5 6.23200e+01 6.19965e-01 108 2022 6 6.25146e+01 5.03207e-01 64 2022 7 6.21588e+01 1.89457e-01 112 2022 8 5.94058e+01 1.32066e+00 72 2022 9 5.21168e+01 1.57530e+00 80 2022 10 4.36660e+01 2.40649e+00 163 2022 11 3.62273e+01 1.92588e+00 181 2022 12 3.30426e+01 3.06635e-01 171 2023 1 3.52928e+01 1.72492e+00 243 2023 2 4.41133e+01 2.50552e+00 219 2023 3 5.08989e+01 2.55318e+00 158 2023 4 5.90676e+01 4.35201e-01 22 2023 5 6.17765e+01 3.02548e-01 90 2023 6 6.22353e+01 2.85690e-02 64 2023 7 6.23746e+01 1.09948e-01 32 2023 8 5.80861e+01 9.00040e-01 76 2023 9 5.34373e+01 1.84187e+00 83 2023 10 4.48150e+01 2.42442e+00 115 2023 11 3.62840e+01 1.77490e+00 133 2023 12 3.24483e+01 8.83453e-01 81 2024 1 3.40373e+01 1.88915e-02 12 2024 2 4.34496e+01 2.94499e+00 123 2024 3 5.23722e+01 2.36492e+00 98 2024 4 5.64616e+01 5.87388e-02 15