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 5.80263e+01 3.38202e-01 92 2002 9 5.56816e+01 1.12090e+00 172 2002 10 4.86464e+01 2.21466e+00 282 2002 11 4.25494e+01 1.61972e+00 324 2002 12 3.90687e+01 1.79056e-01 303 2003 1 4.13389e+01 1.41028e+00 554 2003 2 4.76336e+01 2.30490e+00 250 2003 3 5.37853e+01 1.50709e+00 250 2003 4 5.72927e+01 1.36042e-02 42 2003 5 5.97005e+01 1.90513e-01 4 2003 6 5.98285e+01 1.39838e-02 34 2003 7 nan nan 0 2003 8 5.86194e+01 1.65040e-02 51 2003 9 5.34152e+01 9.39002e-01 116 2003 10 4.93571e+01 1.53545e+00 281 2003 11 4.22642e+01 2.01483e+00 86 2003 12 3.93982e+01 4.32281e-01 144 2004 1 4.16986e+01 1.43119e+00 500 2004 2 4.64997e+01 2.07027e+00 302 2004 3 5.41372e+01 2.15770e+00 304 2004 4 5.82694e+01 8.68012e-01 264 2004 5 5.99735e+01 1.16511e-02 8 2004 6 5.98613e+01 6.38280e-02 107 2004 7 5.93162e+01 1.79667e-01 50 2004 8 nan nan 0 2004 9 5.36510e+01 2.94327e-01 59 2004 10 5.02308e+01 1.08304e+00 127 2004 11 4.23796e+01 1.77206e+00 248 2004 12 3.90591e+01 1.66300e-01 319 2005 1 4.23634e+01 1.67756e+00 227 2005 2 4.74470e+01 2.10143e+00 209 2005 3 5.40528e+01 1.52240e+00 430 2005 4 5.73483e+01 2.27469e-01 96 2005 5 5.98249e+01 2.47202e-02 62 2005 6 5.99840e+01 7.63460e-03 7 2005 7 5.92403e+01 2.72401e-01 60 2005 8 5.88310e+01 1.50887e-02 6 2005 9 5.42801e+01 3.65492e-01 114 2005 10 4.76085e+01 9.97660e-01 36 2005 11 4.30638e+01 1.21566e+00 182 2005 12 3.93627e+01 4.14633e-01 407 2006 1 4.18704e+01 1.36057e+00 198 2006 2 4.79436e+01 1.72496e+00 439 2006 3 5.36496e+01 1.69432e+00 449 2006 4 5.77465e+01 6.23659e-01 103 2006 5 5.98255e+01 9.06601e-02 80 2006 6 5.98235e+01 1.16912e-01 26 2006 7 5.95704e+01 8.31024e-04 9 2006 8 5.74204e+01 4.39264e-01 108 2006 9 5.33522e+01 8.33010e-01 116 2006 10 4.80438e+01 2.19930e+00 168 2006 11 4.31886e+01 1.67140e+00 374 2006 12 3.89081e+01 1.95810e-01 202 2007 1 4.18683e+01 1.53291e+00 385 2007 2 4.73887e+01 1.84145e+00 510 2007 3 5.29098e+01 1.66811e+00 212 2007 4 5.80777e+01 6.52563e-01 86 2007 5 5.96916e+01 2.62632e-01 40 2007 6 5.97780e+01 3.41842e-02 100 2007 7 5.95233e+01 2.47352e-01 171 2007 8 5.80497e+01 3.04425e-01 138 2007 9 5.64641e+01 7.15456e-01 96 2007 10 4.80216e+01 6.68233e-01 86 2007 11 4.28218e+01 1.54715e+00 219 2007 12 3.91281e+01 2.53381e-01 404 2008 1 4.11683e+01 1.51282e+00 414 2008 2 4.73349e+01 1.89138e+00 355 2008 3 5.34778e+01 1.88931e+00 323 2008 4 5.83555e+01 4.12677e-01 189 2008 5 5.98946e+01 6.94243e-02 149 2008 6 5.99922e+01 1.92132e-02 68 2008 7 5.95343e+01 2.12350e-01 143 2008 8 5.82442e+01 1.21375e-02 37 2008 9 5.44435e+01 2.61416e-01 126 2008 10 4.84387e+01 2.08914e+00 274 2008 11 4.30171e+01 1.58422e+00 339 2008 12 3.92040e+01 3.49817e-01 380 2009 1 4.18554e+01 1.58735e+00 399 2009 2 4.72908e+01 1.55291e+00 115 2009 3 5.47916e+01 2.32957e+00 88 2009 4 5.81911e+01 6.83881e-01 311 2009 5 5.97814e+01 2.30566e-01 94 2009 6 5.98452e+01 7.79277e-03 36 2009 7 5.96669e+01 6.69817e-02 58 2009 8 nan nan 0 2009 9 5.38922e+01 1.44881e+00 161 2009 10 4.75428e+01 1.57550e+00 378 2009 11 4.15570e+01 1.50423e+00 292 2009 12 3.92904e+01 3.14165e-01 358 2010 1 4.10758e+01 1.48257e+00 394 2010 2 4.59515e+01 1.18668e+00 247 2010 3 5.37601e+01 1.78539e+00 232 2010 4 5.69374e+01 2.87052e-01 54 2010 5 6.00159e+01 1.07153e-01 58 2010 6 5.98546e+01 2.52201e-02 52 2010 7 nan nan 0 2010 8 5.77291e+01 4.38254e-01 123 2010 9 5.55981e+01 4.80105e-01 133 2010 10 4.78415e+01 8.66789e-01 164 2010 11 4.15359e+01 5.71422e-01 134 2010 12 3.94224e+01 5.64397e-01 334 2011 1 4.19877e+01 8.97273e-01 358 2011 2 4.70645e+01 1.57536e+00 397 2011 3 5.43229e+01 1.83601e+00 252 2011 4 5.84632e+01 4.35603e-01 181 2011 5 5.97558e+01 1.05459e-01 137 2011 6 5.98197e+01 1.20238e-02 6 2011 7 nan nan 0 2011 8 nan nan 0 2011 9 5.39418e+01 1.74397e+00 192 2011 10 4.83221e+01 2.05784e+00 152 2011 11 4.13947e+01 1.08483e+00 137 2011 12 3.91871e+01 2.03671e-01 196 2012 1 4.07408e+01 1.17710e+00 255 2012 2 4.81227e+01 1.23136e+00 198 2012 3 5.27677e+01 1.38600e+00 92 2012 4 5.73652e+01 7.03665e-03 44 2012 5 5.96783e+01 4.25873e-03 25 2012 6 6.00140e+01 0.00000e+00 1 2012 7 5.96105e+01 2.81138e-02 44 2012 8 5.71808e+01 2.29355e-02 58 2012 9 5.40989e+01 9.06668e-01 190 2012 10 4.88019e+01 1.79377e+00 246 2012 11 4.21053e+01 1.37099e+00 243 2012 12 3.93815e+01 3.03725e-01 258 2013 1 4.10715e+01 1.38930e+00 323 2013 2 4.76803e+01 2.08096e+00 489 2013 3 5.35725e+01 1.70831e+00 323 2013 4 5.83279e+01 8.03644e-01 236 2013 5 5.96208e+01 7.26122e-03 17 2013 6 nan nan 0 2013 7 5.92914e+01 2.30602e-01 51 2013 8 5.88136e+01 9.08029e-02 16 2013 9 5.40444e+01 1.31293e+00 114 2013 10 4.83213e+01 1.93008e+00 73 2013 11 4.37024e+01 6.94324e-01 206 2013 12 3.89850e+01 6.00093e-01 248 2014 1 4.15275e+01 1.38270e+00 342 2014 2 4.77721e+01 1.92637e+00 356 2014 3 5.37874e+01 1.47417e+00 365 2014 4 5.83588e+01 8.73567e-01 180 2014 5 5.94843e+01 9.20468e-03 30 2014 6 5.98613e+01 1.14771e-01 85 2014 7 5.97649e+01 8.15719e-02 89 2014 8 5.74722e+01 5.33558e-03 47 2014 9 5.41564e+01 1.25373e+00 124 2014 10 4.92354e+01 1.81360e+00 170 2014 11 4.29860e+01 1.77984e+00 264 2014 12 3.92420e+01 3.60350e-01 439 2015 1 4.16264e+01 1.76767e+00 301 2015 2 4.74659e+01 2.05372e+00 411 2015 3 5.37709e+01 1.87258e+00 174 2015 4 5.87173e+01 3.57656e-01 107 2015 5 5.97363e+01 1.75066e-01 142 2015 6 nan nan 0 2015 7 nan nan 0 2015 8 5.86763e+01 1.48689e-01 203 2015 9 5.44727e+01 1.52275e+00 187 2015 10 4.89945e+01 7.54521e-01 290 2015 11 4.34332e+01 1.40032e+00 179 2015 12 3.92386e+01 2.68682e-01 210 2016 1 4.11245e+01 1.06880e+00 388 2016 2 4.79359e+01 2.04662e+00 334 2016 3 5.36648e+01 1.68191e+00 198 2016 4 5.78494e+01 5.19650e-01 366 2016 5 5.96707e+01 2.59216e-01 142 2016 6 5.97980e+01 5.80091e-02 73 2016 7 5.95440e+01 3.81470e-06 3 2016 8 5.84349e+01 4.38721e-01 91 2016 9 5.42658e+01 1.06182e+00 235 2016 10 4.80183e+01 1.28560e+00 137 2016 11 4.14094e+01 9.75667e-01 84 2016 12 3.93356e+01 3.80517e-01 261 2017 1 4.17259e+01 1.31214e+00 363 2017 2 4.78685e+01 1.40028e+00 402 2017 3 5.37286e+01 9.41545e-01 199 2017 4 5.73062e+01 3.70132e-01 185 2017 5 5.96433e+01 1.01541e-01 121 2017 6 5.98343e+01 7.09709e-02 92 2017 7 5.91201e+01 7.23228e-02 65 2017 8 nan nan 0 2017 9 5.43387e+01 1.71544e+00 96 2017 10 4.80641e+01 1.94601e+00 274 2017 11 4.24543e+01 1.99116e+00 220 2017 12 3.91910e+01 3.66231e-01 363 2018 1 4.10282e+01 1.49677e+00 172 2018 2 4.72730e+01 1.84594e+00 278 2018 3 5.52214e+01 1.33879e+00 189 2018 4 5.87759e+01 7.36358e-01 163 2018 5 5.97408e+01 2.03277e-01 206 2018 6 5.98148e+01 1.99543e-02 77 2018 7 5.95725e+01 1.34934e-02 12 2018 8 5.79767e+01 1.90471e-02 72 2018 9 5.38317e+01 5.39564e-01 86 2018 10 4.66884e+01 9.57002e-01 191 2018 11 4.18533e+01 1.14429e+00 339 2018 12 3.92336e+01 3.39555e-01 226 2019 1 4.12831e+01 1.24156e+00 403 2019 2 4.63280e+01 1.85408e+00 255 2019 3 5.39813e+01 1.08593e+00 331 2019 4 5.85761e+01 7.63425e-01 189 2019 5 5.97945e+01 7.12609e-02 128 2019 6 5.98690e+01 9.78191e-02 95 2019 7 5.93392e+01 1.36402e-02 51 2019 8 5.79306e+01 4.96178e-01 58 2019 9 5.51234e+01 1.29994e+00 174 2019 10 4.83883e+01 1.89031e+00 270 2019 11 4.25738e+01 1.34985e+00 350 2019 12 3.92956e+01 2.48515e-01 348 2020 1 4.00642e+01 1.19742e+00 226 2020 2 4.69456e+01 1.93099e+00 323 2020 3 5.35961e+01 1.94217e+00 318 2020 4 5.82110e+01 8.11909e-01 239 2020 5 5.96747e+01 1.08959e-01 89 2020 6 5.98439e+01 6.54424e-02 251 2020 7 5.96499e+01 5.82956e-02 79 2020 8 5.84456e+01 6.70571e-01 91 2020 9 5.57932e+01 9.49719e-01 56 2020 10 4.77596e+01 1.14117e+00 238 2020 11 4.11900e+01 1.22933e+00 199 2020 12 3.91707e+01 2.93928e-01 335 2021 1 4.14973e+01 1.03557e+00 460 2021 2 4.71696e+01 1.83724e+00 240 2021 3 5.35403e+01 1.68778e+00 331 2021 4 5.86268e+01 6.72831e-01 51 2021 5 5.94846e+01 2.25088e-01 84 2021 6 5.96988e+01 9.20492e-03 34 2021 7 5.92116e+01 1.99726e-02 18 2021 8 5.86065e+01 2.26949e-01 59 2021 9 5.42040e+01 1.35855e+00 177 2021 10 4.84818e+01 2.41165e+00 211 2021 11 4.24225e+01 1.49154e+00 331 2021 12 3.87556e+01 4.41588e-01 277 2022 1 4.17916e+01 1.36753e+00 574 2022 2 4.73028e+01 2.03306e+00 248 2022 3 5.35755e+01 2.19360e+00 212 2022 4 5.84787e+01 1.84587e-02 42 2022 5 5.95185e+01 7.60882e-03 34 2022 6 5.98667e+01 7.81877e-02 163 2022 7 5.96956e+01 9.91846e-03 41 2022 8 5.76097e+01 5.07936e-01 71 2022 9 5.39219e+01 1.27381e+00 35 2022 10 4.89417e+01 1.46812e+00 285 2022 11 4.16174e+01 9.19139e-01 411 2022 12 3.92535e+01 4.10907e-01 792 2023 1 4.20437e+01 1.27096e+00 544 2023 2 4.86511e+01 2.33290e+00 269 2023 3 5.32213e+01 1.98827e+00 479 2023 4 5.82887e+01 9.81854e-01 401 2023 5 5.98157e+01 1.08810e-01 265 2023 6 5.98906e+01 7.56703e-02 151 2023 7 nan nan 0 2023 8 5.82879e+01 7.23160e-01 152 2023 9 5.47486e+01 1.32058e+00 183 2023 10 4.95633e+01 6.35074e-01 220 2023 11 4.24161e+01 1.52551e+00 325 2023 12 3.93522e+01 5.47656e-01 399 2024 1 4.12181e+01 1.28265e+00 450 2024 2 4.79184e+01 1.43021e+00 462 2024 3 5.35083e+01 1.19506e+00 222 2024 4 nan nan 0