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 6.11609e+01 2.50493e-01 224 2002 8 5.88877e+01 1.17865e+00 115 2002 9 5.39896e+01 2.69208e+00 129 2002 10 4.47531e+01 2.01627e+00 253 2002 11 3.77118e+01 2.39561e+00 191 2002 12 3.40619e+01 5.63972e-01 104 2003 1 3.74913e+01 1.21362e+00 307 2003 2 4.26175e+01 1.98462e+00 746 2003 3 5.06821e+01 2.20640e+00 568 2003 4 5.84074e+01 6.17603e-01 238 2003 5 6.04828e+01 1.26547e+00 158 2003 6 6.16384e+01 2.40887e-01 104 2003 7 6.07189e+01 1.25115e-01 103 2003 8 5.97128e+01 5.59513e-01 17 2003 9 5.45800e+01 1.37363e+00 253 2003 10 4.51656e+01 2.88095e+00 377 2003 11 3.84164e+01 2.24045e+00 71 2003 12 3.41803e+01 2.53428e-01 66 2004 1 3.66740e+01 1.36994e+00 446 2004 2 4.28297e+01 2.48425e+00 394 2004 3 5.20639e+01 3.16302e+00 215 2004 4 5.83431e+01 8.19125e-01 300 2004 5 6.15794e+01 1.04786e+00 82 2004 6 6.16120e+01 2.83096e-01 177 2004 7 6.09105e+01 3.96356e-01 184 2004 8 5.78477e+01 1.03558e+00 363 2004 9 5.18934e+01 1.59269e+00 185 2004 10 4.63912e+01 2.65553e+00 138 2004 11 3.76434e+01 2.07361e+00 165 2004 12 3.37716e+01 3.81741e-01 50 2005 1 3.61749e+01 2.21501e+00 122 2005 2 4.40660e+01 1.28181e+00 145 2005 3 5.06814e+01 2.10380e+00 305 2005 4 5.74963e+01 1.29639e+00 181 2005 5 6.17672e+01 5.61528e-01 204 2005 6 6.15980e+01 1.62021e-01 88 2005 7 6.06516e+01 9.33464e-01 62 2005 8 5.81373e+01 2.11383e+00 223 2005 9 5.36814e+01 1.56446e+00 324 2005 10 4.51744e+01 1.96162e+00 120 2005 11 3.72737e+01 1.77788e+00 197 2005 12 3.44434e+01 3.99278e-01 705 2006 1 3.52089e+01 1.27023e+00 479 2006 2 4.42707e+01 1.88171e+00 401 2006 3 5.00885e+01 2.23188e+00 394 2006 4 5.80934e+01 1.63197e+00 269 2006 5 6.03296e+01 1.28819e+00 196 2006 6 6.15250e+01 4.12194e-01 275 2006 7 6.02750e+01 8.20203e-01 158 2006 8 5.90935e+01 9.81784e-01 37 2006 9 5.20288e+01 1.55912e+00 88 2006 10 4.45645e+01 2.17145e+00 104 2006 11 3.85012e+01 1.82775e+00 53 2006 12 3.41403e+01 4.30439e-01 18 2007 1 3.54543e+01 1.55219e+00 216 2007 2 4.43454e+01 2.20325e+00 155 2007 3 5.05293e+01 2.63094e+00 141 2007 4 5.76005e+01 1.59606e+00 236 2007 5 6.01858e+01 8.54135e-01 118 2007 6 6.05858e+01 1.39574e+00 185 2007 7 6.13620e+01 1.78009e-01 117 2007 8 5.95482e+01 8.83847e-01 156 2007 9 5.38687e+01 2.21761e+00 126 2007 10 4.47132e+01 1.92990e+00 85 2007 11 3.92770e+01 1.22674e+00 126 2007 12 3.43446e+01 4.17888e-01 88 2008 1 3.64031e+01 1.51082e+00 138 2008 2 4.42416e+01 2.96422e+00 232 2008 3 4.99619e+01 2.67694e+00 159 2008 4 5.73879e+01 1.74578e+00 141 2008 5 6.14527e+01 8.43977e-01 183 2008 6 6.11060e+01 6.56399e-01 58 2008 7 6.02856e+01 3.22427e-01 52 2008 8 5.88894e+01 1.04365e+00 192 2008 9 5.40899e+01 1.44270e+00 58 2008 10 4.66995e+01 1.76904e+00 148 2008 11 3.87880e+01 2.18413e+00 152 2008 12 3.39838e+01 4.46397e-01 150 2009 1 3.76264e+01 1.18426e+00 147 2009 2 4.31196e+01 2.25173e+00 234 2009 3 4.93815e+01 2.22192e+00 159 2009 4 5.79123e+01 1.01292e+00 298 2009 5 6.16779e+01 5.84995e-01 149 2009 6 6.16702e+01 7.60135e-02 145 2009 7 6.12893e+01 3.14568e-01 195 2009 8 5.86132e+01 9.03856e-01 39 2009 9 5.47862e+01 1.38704e+00 89 2009 10 4.73364e+01 1.99301e+00 169 2009 11 3.91500e+01 1.90130e+00 146 2009 12 3.45462e+01 3.42905e-01 81 2010 1 3.76699e+01 1.21307e+00 148 2010 2 4.38552e+01 1.51218e+00 448 2010 3 5.16692e+01 2.59696e+00 564 2010 4 5.66540e+01 1.51587e+00 164 2010 5 6.15539e+01 8.41460e-01 122 2010 6 6.17777e+01 4.45891e-01 187 2010 7 6.07824e+01 3.47672e-01 65 2010 8 5.91979e+01 7.83669e-01 132 2010 9 5.47663e+01 5.59833e-01 27 2010 10 4.72073e+01 2.22687e+00 172 2010 11 3.80888e+01 1.60221e+00 254 2010 12 3.43463e+01 7.73344e-01 168 2011 1 3.61326e+01 1.57915e+00 261 2011 2 4.31612e+01 1.82462e+00 427 2011 3 5.10903e+01 2.77694e+00 136 2011 4 5.66017e+01 1.12233e+00 410 2011 5 6.13552e+01 1.01949e+00 308 2011 6 6.15339e+01 4.91141e-01 200 2011 7 6.13824e+01 3.90326e-01 246 2011 8 5.87986e+01 9.43006e-01 116 2011 9 5.42839e+01 7.34275e-01 334 2011 10 4.70141e+01 2.87043e+00 59 2011 11 3.68003e+01 1.98721e+00 157 2011 12 3.41766e+01 6.68262e-01 130 2012 1 3.61098e+01 1.05404e+00 460 2012 2 4.56019e+01 1.35133e+00 61 2012 3 4.98402e+01 2.59528e+00 218 2012 4 5.70435e+01 1.20212e+00 80 2012 5 6.13011e+01 1.26018e+00 138 2012 6 6.17918e+01 1.35681e-01 85 2012 7 6.11185e+01 4.60766e-01 226 2012 8 5.91389e+01 7.67773e-01 207 2012 9 5.38258e+01 2.12117e+00 290 2012 10 4.62830e+01 2.32545e+00 91 2012 11 3.81402e+01 1.68690e+00 212 2012 12 3.40435e+01 1.95943e-01 152 2013 1 3.73248e+01 1.05241e+00 216 2013 2 4.26509e+01 1.72259e+00 123 2013 3 5.17686e+01 2.52951e+00 362 2013 4 5.69720e+01 5.79541e-01 151 2013 5 6.13805e+01 6.36325e-01 241 2013 6 6.06465e+01 6.86727e-01 57 2013 7 6.05681e+01 9.20513e-01 142 2013 8 5.73941e+01 4.86187e-01 15 2013 9 5.31609e+01 1.96997e+00 169 2013 10 4.60313e+01 1.84048e+00 289 2013 11 3.83846e+01 1.27920e+00 144 2013 12 3.43385e+01 5.87280e-01 120 2014 1 3.75374e+01 1.43821e+00 189 2014 2 4.39105e+01 1.17757e+00 196 2014 3 5.06057e+01 1.89846e+00 553 2014 4 5.87526e+01 1.34719e+00 309 2014 5 6.08369e+01 7.53287e-01 136 2014 6 6.15387e+01 2.46801e-01 364 2014 7 6.11686e+01 6.27156e-01 151 2014 8 5.96281e+01 8.09596e-01 405 2014 9 5.08032e+01 5.21090e-01 22 2014 10 4.62752e+01 2.98857e+00 232 2014 11 4.01201e+01 1.93546e+00 88 2014 12 3.43105e+01 2.77679e-01 119 2015 1 3.79628e+01 2.03018e+00 234 2015 2 4.43217e+01 2.01292e+00 116 2015 3 5.13294e+01 3.13665e+00 366 2015 4 5.55196e+01 1.26689e+00 146 2015 5 6.13615e+01 5.13134e-01 158 2015 6 6.12693e+01 4.95482e-01 100 2015 7 6.12390e+01 4.12139e-01 134 2015 8 5.88559e+01 1.06222e+00 173 2015 9 5.36465e+01 1.57074e+00 171 2015 10 4.58353e+01 3.31403e+00 238 2015 11 3.82391e+01 1.80929e+00 65 2015 12 3.42140e+01 1.85408e-01 70 2016 1 3.51580e+01 2.69571e-01 50 2016 2 4.33488e+01 1.15545e+00 414 2016 3 5.16059e+01 2.49733e+00 295 2016 4 5.73967e+01 1.40116e+00 203 2016 5 6.05481e+01 1.42601e+00 178 2016 6 6.18540e+01 3.33243e-01 295 2016 7 6.11829e+01 4.83665e-01 226 2016 8 5.86059e+01 7.08214e-01 85 2016 9 5.20413e+01 1.75524e+00 411 2016 10 4.62552e+01 1.72534e+00 122 2016 11 3.77758e+01 1.03889e+00 53 2016 12 3.42477e+01 2.71649e-01 22 2017 1 3.59877e+01 2.08017e+00 182 2017 2 4.38404e+01 1.78679e+00 525 2017 3 5.07777e+01 2.08511e+00 188 2017 4 5.81226e+01 9.27674e-01 126 2017 5 6.12078e+01 8.27115e-01 258 2017 6 6.12108e+01 9.93409e-01 120 2017 7 6.15031e+01 3.02124e-01 134 2017 8 5.90520e+01 1.11094e+00 472 2017 9 5.25973e+01 1.13355e+00 200 2017 10 4.56428e+01 1.02826e+00 62 2017 11 3.80735e+01 2.00476e+00 425 2017 12 3.41380e+01 3.86502e-01 949 2018 1 3.56076e+01 1.13210e+00 303 2018 2 4.28999e+01 1.84022e+00 134 2018 3 5.09975e+01 2.33015e+00 393 2018 4 5.72316e+01 2.23515e+00 355 2018 5 6.04701e+01 5.82312e-01 81 2018 6 6.15100e+01 3.06448e-01 234 2018 7 6.13692e+01 4.76881e-01 240 2018 8 5.71648e+01 1.33062e+00 110 2018 9 5.19380e+01 8.94003e-01 92 2018 10 4.65017e+01 3.21195e+00 98 2018 11 3.86849e+01 1.04811e+00 58 2018 12 3.38876e+01 7.83836e-01 82 2019 1 3.58285e+01 7.47234e-01 73 2019 2 4.43429e+01 2.20166e+00 198 2019 3 5.10362e+01 2.60337e+00 220 2019 4 5.80843e+01 1.50057e+00 259 2019 5 6.07562e+01 1.04020e+00 356 2019 6 6.12122e+01 9.84364e-01 297 2019 7 6.04029e+01 1.75018e+00 197 2019 8 5.97305e+01 8.87524e-01 214 2019 9 5.32393e+01 1.27823e+00 106 2019 10 4.51010e+01 1.85411e+00 122 2019 11 3.87396e+01 2.12155e+00 200 2019 12 3.40800e+01 6.20633e-01 149 2020 1 3.64788e+01 1.66488e+00 87 2020 2 4.57591e+01 2.46803e+00 22 2020 3 5.08902e+01 3.00783e+00 244 2020 4 5.75705e+01 1.08081e+00 193 2020 5 6.10825e+01 6.13583e-01 210 2020 6 6.10923e+01 6.72023e-01 265 2020 7 6.11928e+01 7.66426e-01 141 2020 8 5.93763e+01 7.54020e-01 253 2020 9 5.14534e+01 1.58955e+00 168 2020 10 4.63662e+01 5.55386e-01 89 2020 11 3.66623e+01 1.77269e+00 181 2020 12 3.41239e+01 2.81852e-01 246 2021 1 3.77087e+01 1.19158e+00 339 2021 2 4.27891e+01 1.84819e+00 431 2021 3 5.12863e+01 2.20568e+00 308 2021 4 5.84325e+01 1.66724e+00 315 2021 5 6.12638e+01 7.19589e-01 326 2021 6 6.16074e+01 3.00855e-01 112 2021 7 6.06599e+01 8.81958e-01 294 2021 8 5.83369e+01 1.18302e+00 136 2021 9 5.21394e+01 1.85125e+00 324 2021 10 4.44883e+01 1.85451e+00 247 2021 11 3.94738e+01 1.99065e+00 217 2021 12 3.41786e+01 4.26117e-01 127 2022 1 3.67199e+01 2.00857e+00 275 2022 2 4.42479e+01 2.19368e+00 118 2022 3 5.05179e+01 2.51753e+00 176 2022 4 5.90302e+01 1.15852e+00 24 2022 5 6.11794e+01 7.79292e-01 308 2022 6 6.15279e+01 5.26578e-01 141 2022 7 6.15860e+01 2.86542e-01 91 2022 8 5.80012e+01 6.89042e-01 174 2022 9 5.31278e+01 1.70642e+00 378 2022 10 4.59470e+01 2.32101e+00 352 2022 11 3.83173e+01 2.22401e+00 335 2022 12 3.42217e+01 3.93063e-01 202 2023 1 3.61116e+01 8.24338e-01 348 2023 2 4.40669e+01 2.59076e+00 269 2023 3 5.07133e+01 2.70857e+00 428 2023 4 5.82293e+01 1.58573e+00 90 2023 5 6.07126e+01 6.47961e-01 201 2023 6 6.17376e+01 3.18242e-01 197 2023 7 6.14769e+01 5.53537e-01 224 2023 8 6.00189e+01 6.86007e-01 132 2023 9 5.37494e+01 1.09568e+00 332 2023 10 4.60504e+01 1.59870e+00 381 2023 11 3.80711e+01 1.96972e+00 125 2023 12 3.41551e+01 8.31183e-01 78 2024 1 3.86726e+01 5.05896e-01 151 2024 2 4.55830e+01 2.34614e+00 304 2024 3 5.21740e+01 2.03363e+00 229 2024 4 5.51438e+01 8.29757e-01 19