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 nan nan 0 2002 8 5.71553e+01 1.48240e-01 14 2002 9 5.15143e+01 1.82166e+00 68 2002 10 4.39543e+01 2.62327e+00 127 2002 11 3.71311e+01 1.61455e+00 68 2002 12 3.28554e+01 3.68178e-01 112 2003 1 3.52256e+01 1.50547e+00 156 2003 2 4.09720e+01 1.73800e+00 96 2003 3 5.03741e+01 2.65499e+00 44 2003 4 5.77804e+01 1.96242e-02 16 2003 5 6.13049e+01 5.17197e-01 33 2003 6 6.27366e+01 5.82754e-03 7 2003 7 nan nan 0 2003 8 5.86097e+01 1.20663e-01 31 2003 9 5.13436e+01 1.10662e+00 32 2003 10 4.44562e+01 2.13055e+00 139 2003 11 3.63369e+01 1.58977e+00 78 2003 12 3.29325e+01 2.23313e-01 92 2004 1 3.57253e+01 1.53178e+00 93 2004 2 4.19338e+01 2.68112e+00 115 2004 3 4.96125e+01 2.54901e+00 90 2004 4 5.84013e+01 9.74207e-01 33 2004 5 6.20602e+01 6.76652e-01 35 2004 6 6.26584e+01 2.11465e-01 37 2004 7 6.23906e+01 4.34560e-01 31 2004 8 5.73081e+01 7.67696e-01 31 2004 9 5.02801e+01 7.73990e-01 32 2004 10 4.42842e+01 2.71939e+00 50 2004 11 3.63525e+01 1.66627e+00 103 2004 12 3.27379e+01 2.92556e-01 90 2005 1 3.53654e+01 1.45034e+00 100 2005 2 4.24368e+01 1.27505e+00 96 2005 3 4.97866e+01 1.96003e+00 83 2005 4 5.73486e+01 1.51476e+00 78 2005 5 6.19598e+01 2.55062e-01 32 2005 6 6.26946e+01 1.83846e-01 16 2005 7 6.22433e+01 4.25454e-01 40 2005 8 5.90297e+01 1.51632e-01 25 2005 9 5.14582e+01 1.93707e+00 24 2005 10 4.43801e+01 2.39420e+00 65 2005 11 3.61826e+01 2.13704e+00 112 2005 12 3.31159e+01 4.28321e-01 97 2006 1 3.44857e+01 1.08151e+00 109 2006 2 4.27122e+01 1.89673e+00 159 2006 3 5.04266e+01 2.44894e+00 43 2006 4 5.62740e+01 4.25842e-01 46 2006 5 6.16886e+01 5.79669e-01 47 2006 6 6.25060e+01 1.39523e-02 3 2006 7 6.19621e+01 4.82639e-01 32 2006 8 5.69355e+01 1.13450e-01 8 2006 9 5.44734e+01 5.77127e-01 31 2006 10 4.42967e+01 2.10292e+00 83 2006 11 3.58814e+01 1.32228e+00 80 2006 12 3.27964e+01 4.01086e-01 48 2007 1 3.63796e+01 1.81705e+00 101 2007 2 4.31250e+01 1.80908e+00 82 2007 3 5.08073e+01 1.21527e+00 32 2007 4 5.62633e+01 1.30113e+00 96 2007 5 6.11803e+01 6.09947e-01 54 2007 6 6.26764e+01 3.27282e-01 59 2007 7 6.16957e+01 4.50453e-01 46 2007 8 5.86361e+01 1.77892e+00 32 2007 9 5.49052e+01 3.39641e-02 13 2007 10 4.74784e+01 9.36635e-01 40 2007 11 3.75173e+01 1.90443e+00 105 2007 12 3.29441e+01 4.37417e-01 162 2008 1 3.59347e+01 2.18146e+00 68 2008 2 4.18421e+01 2.69498e+00 126 2008 3 5.08156e+01 2.50824e+00 48 2008 4 5.98589e+01 4.18742e-01 35 2008 5 nan nan 0 2008 6 6.24882e+01 2.32700e-01 18 2008 7 6.09488e+01 2.80264e-01 15 2008 8 5.92072e+01 1.24940e+00 50 2008 9 4.91676e+01 1.69606e+00 11 2008 10 4.36594e+01 1.98074e+00 61 2008 11 3.53682e+01 9.51449e-01 120 2008 12 3.26781e+01 2.50286e-01 77 2009 1 3.56263e+01 2.05232e+00 150 2009 2 4.16558e+01 2.36589e+00 128 2009 3 4.80956e+01 1.32446e+00 64 2009 4 5.81634e+01 1.25515e+00 32 2009 5 6.13219e+01 3.09331e-01 44 2009 6 6.27572e+01 2.11292e-02 16 2009 7 nan nan 0 2009 8 5.97859e+01 1.03850e+00 46 2009 9 5.51466e+01 1.17199e-02 16 2009 10 4.35335e+01 2.58939e+00 126 2009 11 3.65119e+01 1.86467e+00 124 2009 12 3.27595e+01 4.83440e-01 80 2010 1 3.52273e+01 1.71179e+00 97 2010 2 4.33269e+01 1.89757e+00 71 2010 3 5.04938e+01 2.46537e+00 94 2010 4 5.70475e+01 2.24984e+00 41 2010 5 6.17346e+01 6.16391e-01 70 2010 6 6.27680e+01 1.62863e-02 26 2010 7 6.11043e+01 1.06778e-01 36 2010 8 6.02327e+01 1.43854e-02 16 2010 9 5.26549e+01 3.83130e-01 13 2010 10 4.65674e+01 1.88666e+00 110 2010 11 3.73117e+01 1.96332e+00 141 2010 12 3.29547e+01 5.31054e-01 211 2011 1 3.48032e+01 2.29345e+00 56 2011 2 4.29117e+01 2.03803e+00 91 2011 3 4.99837e+01 2.70263e+00 143 2011 4 5.71195e+01 1.78744e+00 46 2011 5 6.21791e+01 3.91216e-01 33 2011 6 6.27189e+01 1.03654e-01 36 2011 7 nan nan 0 2011 8 nan nan 0 2011 9 5.23160e+01 1.72920e+00 43 2011 10 4.63215e+01 1.88335e+00 59 2011 11 3.79214e+01 1.90549e+00 142 2011 12 3.30545e+01 4.89687e-01 158 2012 1 3.43115e+01 1.04058e+00 130 2012 2 4.37831e+01 1.95318e+00 87 2012 3 5.33447e+01 1.17682e+00 48 2012 4 5.54141e+01 1.95393e-01 16 2012 5 6.19164e+01 7.23887e-01 55 2012 6 nan nan 0 2012 7 6.26152e+01 1.20948e-01 12 2012 8 5.80439e+01 1.35979e+00 38 2012 9 5.23448e+01 3.06174e+00 33 2012 10 4.30256e+01 1.66723e+00 123 2012 11 3.70439e+01 1.75014e+00 150 2012 12 3.26779e+01 1.15863e-02 16 2013 1 3.54442e+01 1.85261e+00 90 2013 2 4.13754e+01 2.14192e+00 124 2013 3 4.99746e+01 1.72878e+00 112 2013 4 5.81426e+01 1.38603e+00 51 2013 5 6.15722e+01 3.27165e-01 49 2013 6 6.26829e+01 8.83090e-03 16 2013 7 6.20634e+01 5.85886e-01 53 2013 8 5.68814e+01 2.62005e-03 16 2013 9 4.94142e+01 8.27236e-03 16 2013 10 4.50253e+01 2.13494e+00 167 2013 11 3.74095e+01 2.09811e+00 65 2013 12 3.27140e+01 7.65209e-01 88 2014 1 3.60945e+01 1.21279e+00 106 2014 2 4.17496e+01 2.01636e+00 147 2014 3 4.99249e+01 2.02249e+00 127 2014 4 5.84064e+01 1.96768e+00 69 2014 5 6.12280e+01 6.48318e-01 80 2014 6 6.27716e+01 1.67939e-01 49 2014 7 6.15489e+01 5.87197e-03 16 2014 8 5.92939e+01 1.08563e+00 70 2014 9 nan nan 0 2014 10 4.35064e+01 1.94387e+00 103 2014 11 3.74642e+01 2.04087e+00 100 2014 12 3.27289e+01 4.39846e-01 110 2015 1 3.61609e+01 1.73185e+00 102 2015 2 4.29150e+01 1.67016e+00 124 2015 3 5.08860e+01 2.74261e+00 118 2015 4 5.49002e+01 1.90694e+00 10 2015 5 6.11429e+01 8.83707e-01 64 2015 6 6.27250e+01 5.61858e-02 44 2015 7 6.08468e+01 1.05780e+00 24 2015 8 5.95621e+01 1.03872e+00 54 2015 9 nan nan 0 2015 10 4.28213e+01 7.73137e-01 25 2015 11 3.57344e+01 1.60603e+00 49 2015 12 3.25685e+01 7.01959e-02 38 2016 1 3.65726e+01 1.18209e+00 36 2016 2 4.38842e+01 2.96827e+00 46 2016 3 5.10472e+01 2.92228e+00 49 2016 4 5.78252e+01 1.17950e+00 25 2016 5 6.17093e+01 4.80617e-01 25 2016 6 6.26465e+01 1.13034e-01 32 2016 7 6.19874e+01 6.53827e-01 65 2016 8 5.84648e+01 4.17521e-01 44 2016 9 5.19018e+01 1.01099e+00 74 2016 10 4.55213e+01 1.94065e+00 68 2016 11 3.62222e+01 1.37140e+00 144 2016 12 3.27118e+01 2.37653e-01 80 2017 1 3.55999e+01 1.70447e+00 148 2017 2 4.22372e+01 2.04159e+00 110 2017 3 5.11888e+01 2.03428e+00 124 2017 4 5.90970e+01 1.27008e+00 45 2017 5 6.12930e+01 6.62552e-01 78 2017 6 6.27857e+01 1.05795e-02 14 2017 7 6.20778e+01 4.21101e-01 48 2017 8 5.92234e+01 6.98626e-01 36 2017 9 5.31540e+01 0.00000e+00 4 2017 10 4.30808e+01 1.94701e+00 37 2017 11 3.72309e+01 1.95836e+00 157 2017 12 3.28562e+01 3.57030e-01 236 2018 1 3.43795e+01 9.43714e-01 66 2018 2 4.28612e+01 1.99915e+00 119 2018 3 4.98246e+01 3.00056e+00 139 2018 4 5.88465e+01 2.92788e-01 23 2018 5 6.01606e+01 1.26741e-01 16 2018 6 6.16739e+01 2.28367e+00 19 2018 7 6.23882e+01 2.74180e-01 22 2018 8 5.99881e+01 7.04333e-01 20 2018 9 5.22724e+01 1.88695e+00 126 2018 10 4.38984e+01 2.65031e+00 141 2018 11 3.77739e+01 1.24623e+00 56 2018 12 3.29051e+01 4.50679e-01 115 2019 1 3.46872e+01 9.32564e-01 130 2019 2 4.23131e+01 2.60042e+00 140 2019 3 5.15839e+01 2.75453e+00 53 2019 4 5.80359e+01 1.47362e+00 77 2019 5 6.18065e+01 3.37992e-01 19 2019 6 6.27899e+01 1.08950e-01 28 2019 7 6.11889e+01 3.06143e-01 33 2019 8 5.93699e+01 5.31786e-01 32 2019 9 5.10338e+01 2.83455e-02 18 2019 10 4.37653e+01 2.24467e+00 67 2019 11 3.69185e+01 2.05340e+00 143 2019 12 3.31605e+01 4.76891e-01 90 2020 1 3.52545e+01 1.67411e+00 153 2020 2 4.13440e+01 2.58563e+00 80 2020 3 4.99985e+01 2.13375e+00 35 2020 4 6.01574e+01 8.11688e-02 20 2020 5 6.09959e+01 1.28780e-01 32 2020 6 6.26987e+01 9.24228e-02 36 2020 7 6.24247e+01 2.35744e-03 12 2020 8 5.80272e+01 1.36594e+00 57 2020 9 5.10926e+01 1.22247e+00 56 2020 10 4.41145e+01 2.50889e+00 75 2020 11 3.58995e+01 9.93186e-01 26 2020 12 3.28120e+01 2.54415e-01 138 2021 1 3.53094e+01 1.45244e+00 144 2021 2 4.14861e+01 2.17263e+00 94 2021 3 5.01797e+01 2.49474e+00 111 2021 4 5.80210e+01 4.09393e-01 45 2021 5 6.07663e+01 4.85372e-01 18 2021 6 nan nan 0 2021 7 6.16113e+01 5.32540e-01 79 2021 8 5.77397e+01 7.84070e-01 25 2021 9 5.07439e+01 1.93187e+00 67 2021 10 4.35507e+01 1.85880e+00 32 2021 11 3.55927e+01 1.70067e+00 100 2021 12 3.30385e+01 4.28685e-01 202 2022 1 3.53691e+01 1.69767e+00 106 2022 2 4.19512e+01 2.28760e+00 123 2022 3 5.00041e+01 9.33529e-01 42 2022 4 5.98847e+01 9.84255e-03 3 2022 5 6.13010e+01 6.47396e-01 67 2022 6 6.26964e+01 1.35019e-01 32 2022 7 6.20731e+01 2.75835e-01 48 2022 8 5.87719e+01 1.24314e+00 56 2022 9 5.38025e+01 1.34496e+00 64 2022 10 4.47741e+01 2.77352e+00 80 2022 11 3.63868e+01 1.29251e+00 100 2022 12 3.29975e+01 3.39361e-01 70 2023 1 3.50196e+01 1.70090e+00 171 2023 2 4.25527e+01 2.48071e+00 160 2023 3 4.86832e+01 1.83727e+00 73 2023 4 5.50324e+01 2.38708e+00 5 2023 5 6.12569e+01 2.06711e-01 36 2023 6 6.27545e+01 1.33134e-02 16 2023 7 6.19757e+01 2.70422e-01 31 2023 8 5.78714e+01 1.00889e+00 41 2023 9 5.47663e+01 6.72208e-01 32 2023 10 4.34942e+01 2.91472e+00 58 2023 11 3.56179e+01 1.78264e+00 60 2023 12 3.24275e+01 1.01488e+00 75 2024 1 3.57244e+01 2.27240e+00 32 2024 2 4.32432e+01 2.24764e+00 91 2024 3 5.20482e+01 2.66102e+00 70 2024 4 5.58186e+01 1.58380e-02 16