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 6.03649e+01 6.78630e-01 253 2002 8 5.85495e+01 1.37914e+00 175 2002 9 5.34582e+01 2.28802e+00 221 2002 10 4.54335e+01 2.06702e+00 538 2002 11 3.99993e+01 1.38588e+00 191 2002 12 3.42709e+01 2.71657e-01 208 2003 1 3.63201e+01 1.10016e+00 69 2003 2 4.47459e+01 2.32342e+00 344 2003 3 5.12699e+01 1.99767e+00 309 2003 4 5.74867e+01 1.48143e+00 405 2003 5 6.10276e+01 7.89653e-01 315 2003 6 6.24961e+01 7.04089e-02 95 2003 7 5.99936e+01 7.42580e-01 185 2003 8 5.93364e+01 1.07726e+00 57 2003 9 5.35542e+01 1.73837e+00 236 2003 10 4.61579e+01 2.52369e+00 185 2003 11 3.58895e+01 1.41107e+00 68 2003 12 3.42653e+01 1.77918e-01 82 2004 1 3.70538e+01 1.22393e+00 377 2004 2 4.30879e+01 2.39736e+00 317 2004 3 5.18119e+01 3.18789e+00 495 2004 4 5.82470e+01 1.46851e+00 313 2004 5 6.16647e+01 7.87884e-01 183 2004 6 6.20835e+01 4.52236e-01 197 2004 7 6.14436e+01 5.50818e-01 187 2004 8 5.79456e+01 1.12543e+00 134 2004 9 5.14963e+01 8.88390e-01 75 2004 10 4.46445e+01 2.49237e+00 554 2004 11 3.83291e+01 1.59054e+00 603 2004 12 3.41796e+01 3.84001e-01 322 2005 1 3.70267e+01 1.87755e+00 251 2005 2 4.24907e+01 2.11250e+00 176 2005 3 5.21041e+01 2.03020e+00 297 2005 4 5.86933e+01 9.13230e-01 40 2005 5 6.07644e+01 1.24862e+00 309 2005 6 6.22697e+01 6.75457e-01 147 2005 7 6.03525e+01 1.04217e+00 347 2005 8 5.91912e+01 7.50625e-01 120 2005 9 5.26190e+01 2.39775e+00 168 2005 10 4.55271e+01 2.88898e+00 80 2005 11 3.61112e+01 1.58438e+00 296 2005 12 3.45110e+01 3.85103e-01 756 2006 1 3.67126e+01 1.44560e+00 192 2006 2 4.62746e+01 1.34168e+00 303 2006 3 5.00974e+01 2.08321e+00 125 2006 4 5.83174e+01 1.23811e+00 243 2006 5 6.03603e+01 1.25126e+00 164 2006 6 6.21481e+01 7.32575e-01 304 2006 7 6.05560e+01 5.72302e-01 130 2006 8 5.96989e+01 5.15614e-01 145 2006 9 5.10614e+01 1.26371e+00 289 2006 10 4.50188e+01 1.95565e+00 438 2006 11 3.70132e+01 1.41560e+00 140 2006 12 3.37140e+01 6.10265e-01 170 2007 1 3.58212e+01 1.66752e+00 458 2007 2 4.61586e+01 1.47706e+00 29 2007 3 5.11895e+01 2.29228e+00 325 2007 4 5.80417e+01 1.45063e+00 278 2007 5 6.04467e+01 9.84494e-01 368 2007 6 6.09094e+01 1.33670e+00 137 2007 7 6.06578e+01 1.16677e+00 334 2007 8 5.85129e+01 1.50858e+00 120 2007 9 5.25374e+01 1.53751e+00 62 2007 10 4.51611e+01 2.58910e+00 163 2007 11 3.91573e+01 1.63172e+00 242 2007 12 3.41235e+01 5.99305e-01 128 2008 1 3.70808e+01 1.67496e+00 285 2008 2 4.18806e+01 1.91563e+00 307 2008 3 5.09181e+01 1.98286e+00 228 2008 4 5.68684e+01 1.82338e+00 366 2008 5 6.10200e+01 9.11641e-01 262 2008 6 6.16182e+01 6.90227e-01 159 2008 7 6.09355e+01 7.06912e-01 277 2008 8 5.93870e+01 7.28582e-01 225 2008 9 5.21418e+01 1.05572e+00 83 2008 10 4.49950e+01 2.96096e+00 141 2008 11 3.82788e+01 1.80098e+00 312 2008 12 3.43916e+01 3.51485e-01 209 2009 1 3.73714e+01 1.42755e+00 57 2009 2 4.44267e+01 1.70459e+00 385 2009 3 5.00613e+01 2.98825e+00 185 2009 4 5.74446e+01 1.52343e+00 277 2009 5 6.09246e+01 7.27320e-01 299 2009 6 6.25070e+01 1.68180e-01 100 2009 7 6.02960e+01 5.86357e-01 130 2009 8 5.81218e+01 1.63471e+00 221 2009 9 5.22999e+01 2.40173e+00 286 2009 10 4.53577e+01 2.55727e+00 481 2009 11 3.82448e+01 2.26248e+00 403 2009 12 3.44661e+01 2.31114e-01 231 2010 1 3.70211e+01 1.35484e+00 187 2010 2 4.30283e+01 2.08301e+00 59 2010 3 5.13852e+01 1.72997e+00 129 2010 4 5.74543e+01 1.40680e+00 276 2010 5 6.03547e+01 1.31669e+00 276 2010 6 6.21995e+01 3.83159e-01 218 2010 7 6.10225e+01 5.06306e-01 113 2010 8 5.85002e+01 1.14091e+00 253 2010 9 5.44461e+01 1.30892e+00 276 2010 10 4.64378e+01 2.47083e+00 279 2010 11 3.86597e+01 1.75171e+00 598 2010 12 3.46267e+01 3.04451e-01 270 2011 1 3.65173e+01 8.31619e-01 30 2011 2 4.40390e+01 2.09211e+00 191 2011 3 5.31917e+01 1.35789e+00 304 2011 4 5.68112e+01 1.65403e+00 474 2011 5 6.12632e+01 6.74903e-01 246 2011 6 6.23532e+01 4.77946e-01 362 2011 7 6.10238e+01 1.92242e-01 168 2011 8 5.87448e+01 5.05477e-01 76 2011 9 5.32314e+01 1.04328e+00 170 2011 10 4.64578e+01 2.19175e+00 185 2011 11 3.74160e+01 1.57079e+00 367 2011 12 3.42081e+01 3.70839e-01 214 2012 1 3.68307e+01 1.27392e+00 485 2012 2 4.52867e+01 2.29506e+00 212 2012 3 5.12507e+01 2.19142e+00 305 2012 4 5.70710e+01 1.46161e+00 305 2012 5 6.08898e+01 8.10970e-01 48 2012 6 6.17515e+01 3.37478e-01 103 2012 7 6.08918e+01 3.90311e-01 41 2012 8 5.88837e+01 3.81422e-01 135 2012 9 5.27180e+01 1.94703e+00 171 2012 10 4.51045e+01 1.23837e+00 86 2012 11 3.68844e+01 1.50349e+00 452 2012 12 3.44303e+01 4.89064e-01 166 2013 1 3.73851e+01 1.40839e+00 317 2013 2 4.33335e+01 2.32796e+00 312 2013 3 5.24925e+01 2.48931e+00 339 2013 4 5.84410e+01 8.75068e-01 342 2013 5 6.16320e+01 5.10679e-01 160 2013 6 6.21041e+01 7.32602e-01 58 2013 7 6.10627e+01 4.89652e-01 175 2013 8 5.83446e+01 1.08557e+00 123 2013 9 5.17621e+01 1.84314e+00 93 2013 10 4.47132e+01 2.67017e+00 345 2013 11 3.85661e+01 2.27179e+00 359 2013 12 3.45874e+01 5.04354e-01 269 2014 1 3.70616e+01 1.71532e+00 214 2014 2 4.28542e+01 1.74100e+00 335 2014 3 5.10387e+01 2.39669e+00 237 2014 4 5.78130e+01 1.21294e+00 130 2014 5 6.10358e+01 8.48757e-01 240 2014 6 6.20245e+01 5.28885e-01 295 2014 7 6.09912e+01 4.82689e-01 137 2014 8 5.80484e+01 1.41544e+00 152 2014 9 5.35189e+01 2.09168e+00 73 2014 10 4.74548e+01 1.15879e+00 156 2014 11 3.76414e+01 1.54302e+00 510 2014 12 3.43865e+01 2.68562e-01 248 2015 1 3.74374e+01 1.71618e+00 46 2015 2 4.46097e+01 2.15589e+00 41 2015 3 4.92980e+01 1.66795e+00 363 2015 4 5.77641e+01 1.08120e+00 259 2015 5 6.15404e+01 5.38573e-01 314 2015 6 6.24673e+01 1.59360e-01 171 2015 7 6.05380e+01 6.82751e-01 9 2015 8 5.97021e+01 4.28088e-01 28 2015 9 5.48021e+01 1.93368e+00 45 2015 10 4.55405e+01 2.30518e+00 175 2015 11 3.70560e+01 1.87178e+00 186 2015 12 3.43885e+01 6.61533e-01 120 2016 1 3.46472e+01 4.03361e-01 18 2016 2 4.40369e+01 2.07814e+00 140 2016 3 5.22498e+01 2.16888e+00 222 2016 4 5.83319e+01 1.86503e+00 237 2016 5 6.07169e+01 1.13979e+00 333 2016 6 6.24234e+01 2.08994e-01 167 2016 7 6.13879e+01 8.44431e-01 238 2016 8 5.94165e+01 8.01251e-01 150 2016 9 5.05621e+01 9.45827e-01 100 2016 10 4.52506e+01 1.42014e+00 283 2016 11 3.79717e+01 1.85835e+00 224 2016 12 3.37252e+01 6.71695e-01 270 2017 1 3.69581e+01 1.08817e+00 239 2017 2 4.34983e+01 1.72691e+00 128 2017 3 5.14086e+01 2.45750e+00 416 2017 4 5.66529e+01 1.80937e+00 390 2017 5 6.13691e+01 7.78391e-01 368 2017 6 6.21667e+01 5.46614e-01 245 2017 7 6.11801e+01 6.39021e-01 205 2017 8 5.93778e+01 1.17311e-01 33 2017 9 5.27122e+01 1.76182e+00 74 2017 10 4.29360e+01 2.64883e+00 81 2017 11 3.74630e+01 1.47851e+00 454 2017 12 3.42684e+01 3.01709e-01 247 2018 1 3.67863e+01 1.11519e+00 91 2018 2 4.41197e+01 1.49904e+00 123 2018 3 5.10028e+01 1.72161e+00 424 2018 4 5.74171e+01 1.66203e+00 284 2018 5 5.98087e+01 9.44904e-01 15 2018 6 6.24609e+01 4.16477e-01 102 2018 7 6.11279e+01 7.47423e-01 245 2018 8 5.82584e+01 1.31671e+00 100 2018 9 5.29577e+01 2.12247e+00 258 2018 10 4.41589e+01 1.28967e+00 17 2018 11 3.74442e+01 1.51662e+00 59 2018 12 3.43872e+01 4.34982e-01 336 2019 1 3.58380e+01 8.59011e-01 168 2019 2 4.34672e+01 2.51904e+00 154 2019 3 5.10446e+01 2.73670e+00 577 2019 4 5.72168e+01 2.01461e+00 181 2019 5 6.09619e+01 9.51364e-01 487 2019 6 6.17939e+01 7.73203e-01 444 2019 7 6.03470e+01 9.02384e-01 319 2019 8 5.90388e+01 1.11511e+00 179 2019 9 5.13061e+01 2.43675e+00 261 2019 10 4.48316e+01 1.88648e+00 476 2019 11 3.75021e+01 1.73036e+00 247 2019 12 3.42690e+01 5.48166e-01 322 2020 1 3.61030e+01 1.33852e+00 141 2020 2 4.51454e+01 1.33689e+00 140 2020 3 5.20236e+01 2.24794e+00 473 2020 4 5.68749e+01 1.38983e+00 410 2020 5 6.08858e+01 5.16713e-01 425 2020 6 6.23458e+01 3.85121e-01 245 2020 7 6.12244e+01 5.52686e-01 214 2020 8 5.87729e+01 1.27517e+00 335 2020 9 5.29191e+01 2.47797e+00 391 2020 10 4.63619e+01 1.00673e+00 227 2020 11 3.72052e+01 2.03935e+00 116 2020 12 3.43581e+01 3.62808e-01 214 2021 1 3.74773e+01 1.85933e+00 315 2021 2 4.45056e+01 2.11072e+00 209 2021 3 5.22870e+01 1.68934e+00 195 2021 4 5.78331e+01 1.45184e+00 343 2021 5 6.12889e+01 7.68886e-01 404 2021 6 6.24562e+01 2.83379e-01 129 2021 7 6.07118e+01 6.34613e-01 179 2021 8 5.91718e+01 8.22517e-01 100 2021 9 5.25259e+01 1.86042e+00 138 2021 10 4.56265e+01 2.20824e+00 120 2021 11 3.75353e+01 2.29424e+00 167 2021 12 3.43900e+01 4.23345e-01 314 2022 1 3.55370e+01 1.61497e+00 135 2022 2 4.42046e+01 2.19898e+00 238 2022 3 5.06951e+01 2.90859e+00 249 2022 4 5.97719e+01 5.30938e-01 59 2022 5 6.04077e+01 8.13069e-01 153 2022 6 6.24034e+01 3.73549e-01 22 2022 7 6.14990e+01 9.45388e-01 107 2022 8 5.78241e+01 7.82649e-01 256 2022 9 5.47881e+01 1.12415e+00 272 2022 10 4.40640e+01 2.43476e+00 77 2022 11 3.78016e+01 2.08659e+00 430 2022 12 3.43965e+01 2.45299e-01 401 2023 1 3.61116e+01 1.44342e+00 249 2023 2 4.50760e+01 2.18255e+00 505 2023 3 5.17256e+01 2.09508e+00 403 2023 4 5.83939e+01 1.62028e+00 168 2023 5 6.13142e+01 3.64155e-01 111 2023 6 6.24446e+01 1.52746e-01 57 2023 7 6.08181e+01 9.51361e-01 264 2023 8 5.97279e+01 1.05063e+00 166 2023 9 5.35803e+01 1.69015e+00 163 2023 10 4.44086e+01 1.81354e+00 146 2023 11 3.87098e+01 1.55155e+00 233 2023 12 3.35543e+01 1.03630e+00 256 2024 1 3.75480e+01 1.41832e+00 164 2024 2 4.38199e+01 2.52736e+00 354 2024 3 5.36258e+01 1.91203e+00 350 2024 4 nan nan 0