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 5.97125e+01 8.61235e-02 256 2002 8 5.81750e+01 3.18360e-01 256 2002 9 5.62273e+01 8.16474e-01 192 2002 10 4.91339e+01 2.04286e+00 517 2002 11 4.35327e+01 1.73073e+00 1332 2002 12 3.97207e+01 2.08830e-01 573 2003 1 4.19036e+01 1.32517e+00 997 2003 2 4.75422e+01 1.50952e+00 880 2003 3 5.39600e+01 1.63392e+00 704 2003 4 5.97270e+01 4.72787e-01 135 2003 5 5.98675e+01 1.32098e-01 320 2003 6 5.99025e+01 1.68109e-01 105 2003 7 5.95825e+01 6.05355e-02 192 2003 8 5.88772e+01 2.03722e-01 256 2003 9 5.49805e+01 1.69111e+00 264 2003 10 4.93125e+01 1.90621e+00 512 2003 11 4.28796e+01 1.64507e+00 454 2003 12 3.97119e+01 3.69881e-01 715 2004 1 4.19767e+01 1.36731e+00 803 2004 2 4.78029e+01 2.08154e+00 834 2004 3 5.44638e+01 1.86465e+00 670 2004 4 5.89881e+01 7.78061e-01 704 2004 5 6.01863e+01 4.37199e-02 192 2004 6 5.97347e+01 2.70409e-01 75 2004 7 5.96023e+01 7.10468e-02 134 2004 8 5.83861e+01 5.40652e-01 320 2004 9 5.41097e+01 9.91223e-01 231 2004 10 5.05083e+01 1.73003e+00 448 2004 11 4.26583e+01 1.79790e+00 518 2004 12 3.97828e+01 3.77568e-01 660 2005 1 4.21982e+01 1.65886e+00 231 2005 2 4.90264e+01 1.72276e+00 560 2005 3 5.47257e+01 1.37631e+00 832 2005 4 5.87900e+01 8.25712e-01 237 2005 5 6.01382e+01 5.28877e-02 317 2005 6 5.97978e+01 1.66208e-03 64 2005 7 5.97307e+01 1.14424e-01 65 2005 8 5.79766e+01 4.37774e-01 238 2005 9 5.54597e+01 1.07445e+00 214 2005 10 4.79235e+01 9.52811e-01 383 2005 11 4.35402e+01 1.65152e+00 650 2005 12 3.98987e+01 3.06052e-01 872 2006 1 4.22610e+01 1.30126e+00 460 2006 2 4.80389e+01 1.84273e+00 923 2006 3 5.38541e+01 1.51848e+00 861 2006 4 5.88605e+01 8.12167e-01 449 2006 5 6.00177e+01 1.86250e-01 288 2006 6 5.95935e+01 4.90045e-02 70 2006 7 5.95135e+01 1.05403e-01 256 2006 8 5.83194e+01 4.55329e-03 64 2006 9 5.45914e+01 1.24699e+00 384 2006 10 4.94551e+01 2.11462e+00 499 2006 11 4.35436e+01 1.57851e+00 960 2006 12 3.97044e+01 2.93860e-01 856 2007 1 4.21418e+01 1.49709e+00 911 2007 2 4.80505e+01 1.94021e+00 990 2007 3 5.44575e+01 1.72560e+00 325 2007 4 5.84951e+01 6.32421e-01 464 2007 5 6.01360e+01 6.47078e-02 192 2007 6 5.97964e+01 2.17539e-01 183 2007 7 5.97075e+01 1.24672e-01 183 2007 8 5.84992e+01 6.64038e-01 240 2007 9 5.61335e+01 1.19481e+00 180 2007 10 4.92765e+01 8.68973e-01 320 2007 11 4.36532e+01 1.90406e+00 332 2007 12 3.97271e+01 3.14856e-01 788 2008 1 4.16578e+01 1.34955e+00 771 2008 2 4.83616e+01 1.36562e+00 649 2008 3 5.47210e+01 1.56076e+00 544 2008 4 5.87552e+01 4.76176e-01 467 2008 5 6.01105e+01 1.12455e-01 278 2008 6 5.96389e+01 8.80951e-02 128 2008 7 5.95365e+01 2.02238e-01 286 2008 8 5.86094e+01 7.22564e-01 320 2008 9 5.44197e+01 1.08040e+00 317 2008 10 4.92475e+01 1.85330e+00 719 2008 11 4.34482e+01 1.69014e+00 829 2008 12 3.97827e+01 2.90697e-01 613 2009 1 4.21448e+01 1.64534e+00 862 2009 2 4.85438e+01 1.99082e+00 514 2009 3 5.46964e+01 1.74133e+00 636 2009 4 5.86716e+01 7.27959e-01 646 2009 5 6.01121e+01 1.70244e-01 186 2009 6 5.98591e+01 2.73429e-01 100 2009 7 5.95644e+01 1.68114e-01 429 2009 8 5.86492e+01 6.17705e-01 362 2009 9 5.49196e+01 1.33464e+00 588 2009 10 4.92819e+01 1.65375e+00 797 2009 11 4.29831e+01 1.73504e+00 963 2009 12 3.98701e+01 3.76755e-01 721 2010 1 4.14568e+01 1.39634e+00 648 2010 2 4.71614e+01 1.77131e+00 759 2010 3 5.49226e+01 1.45019e+00 515 2010 4 5.77598e+01 5.98599e-01 128 2010 5 5.99313e+01 1.72877e-01 128 2010 6 5.96292e+01 1.55206e-01 186 2010 7 5.96818e+01 2.72047e-01 119 2010 8 5.85253e+01 5.91231e-01 384 2010 9 5.62201e+01 5.24549e-01 253 2010 10 4.86705e+01 1.30227e+00 520 2010 11 4.35250e+01 1.36856e+00 303 2010 12 4.00462e+01 3.78638e-01 635 2011 1 4.28274e+01 1.13587e+00 750 2011 2 4.76722e+01 1.88522e+00 769 2011 3 5.39881e+01 1.85428e+00 857 2011 4 5.88408e+01 7.68401e-01 423 2011 5 6.00731e+01 1.83580e-01 192 2011 6 5.97300e+01 1.71819e-02 46 2011 7 5.95168e+01 1.37916e-01 251 2011 8 5.83342e+01 8.10278e-01 192 2011 9 5.47132e+01 1.53442e+00 375 2011 10 4.96851e+01 1.93027e+00 735 2011 11 4.32052e+01 1.58670e+00 366 2011 12 3.99411e+01 3.24417e-01 650 2012 1 4.15786e+01 1.25340e+00 738 2012 2 4.88269e+01 1.58307e+00 650 2012 3 5.39481e+01 1.37083e+00 511 2012 4 5.88578e+01 7.34231e-01 561 2012 5 5.98696e+01 4.84283e-02 138 2012 6 5.97609e+01 3.49845e-03 64 2012 7 5.96047e+01 1.52709e-01 128 2012 8 5.89828e+01 3.22232e-03 45 2012 9 5.54997e+01 1.54013e+00 576 2012 10 4.90966e+01 2.05746e+00 384 2012 11 4.30653e+01 1.64562e+00 641 2012 12 3.98421e+01 3.56390e-01 462 2013 1 4.21382e+01 1.39609e+00 503 2013 2 4.84998e+01 2.20191e+00 591 2013 3 5.44519e+01 1.55534e+00 583 2013 4 5.90383e+01 4.44421e-01 339 2013 5 6.00849e+01 1.34617e-01 247 2013 6 nan nan 0 2013 7 5.96862e+01 4.41631e-02 162 2013 8 5.82781e+01 8.49268e-01 185 2013 9 5.38390e+01 4.84598e-01 278 2013 10 4.93458e+01 1.72866e+00 320 2013 11 4.31305e+01 1.27306e+00 924 2013 12 3.97256e+01 2.75711e-01 681 2014 1 4.21735e+01 1.28514e+00 981 2014 2 4.83239e+01 1.84297e+00 778 2014 3 5.47778e+01 1.47606e+00 640 2014 4 5.84602e+01 8.98868e-01 585 2014 5 5.98311e+01 1.33931e-01 131 2014 6 5.96276e+01 8.06501e-02 191 2014 7 5.96254e+01 1.51101e-01 256 2014 8 5.86082e+01 6.72355e-01 182 2014 9 5.54789e+01 9.84811e-01 384 2014 10 4.93096e+01 1.84617e+00 485 2014 11 4.33535e+01 1.53957e+00 917 2014 12 3.97597e+01 3.11227e-01 805 2015 1 4.18756e+01 1.21811e+00 631 2015 2 4.76989e+01 2.21583e+00 558 2015 3 5.48123e+01 1.74995e+00 525 2015 4 5.87635e+01 7.75329e-01 637 2015 5 6.01242e+01 7.91289e-02 256 2015 6 5.99474e+01 1.51382e-01 128 2015 7 5.95635e+01 1.24475e-01 128 2015 8 5.87507e+01 3.00946e-01 320 2015 9 5.49076e+01 1.27102e+00 512 2015 10 4.87915e+01 1.74642e+00 694 2015 11 4.35798e+01 1.63662e+00 317 2015 12 3.97832e+01 2.74629e-01 679 2016 1 4.12672e+01 1.33156e+00 742 2016 2 4.78552e+01 2.17464e+00 1116 2016 3 5.47279e+01 1.90592e+00 352 2016 4 5.88079e+01 4.35617e-01 503 2016 5 6.00808e+01 5.04448e-02 193 2016 6 5.96682e+01 4.22523e-02 128 2016 7 5.97279e+01 1.53300e-01 220 2016 8 5.85628e+01 3.79700e-01 198 2016 9 5.53544e+01 1.22364e+00 532 2016 10 4.97064e+01 1.88040e+00 509 2016 11 4.28540e+01 1.71094e+00 333 2016 12 3.97928e+01 2.49964e-01 466 2017 1 4.22684e+01 1.53801e+00 671 2017 2 4.71903e+01 1.50591e+00 809 2017 3 5.43037e+01 1.68511e+00 648 2017 4 5.82950e+01 7.30416e-01 480 2017 5 5.99385e+01 1.73175e-01 456 2017 6 5.97620e+01 1.80997e-01 454 2017 7 5.94883e+01 2.30637e-01 218 2017 8 5.86115e+01 4.69844e-01 192 2017 9 5.60643e+01 7.72111e-01 178 2017 10 5.06208e+01 1.63159e+00 445 2017 11 4.29799e+01 1.98178e+00 627 2017 12 3.97952e+01 3.13458e-01 691 2018 1 4.19212e+01 1.55954e+00 359 2018 2 4.71478e+01 1.96370e+00 460 2018 3 5.41687e+01 1.49386e+00 584 2018 4 5.85313e+01 8.00758e-01 384 2018 5 6.00536e+01 1.71824e-01 320 2018 6 5.97866e+01 2.01604e-01 384 2018 7 5.96829e+01 3.04063e-03 64 2018 8 5.83224e+01 5.07654e-01 512 2018 9 5.53387e+01 1.38528e+00 321 2018 10 4.73064e+01 5.96151e-01 418 2018 11 4.28160e+01 1.57212e+00 896 2018 12 3.98869e+01 3.23958e-01 811 2019 1 4.15033e+01 1.37969e+00 822 2019 2 4.70534e+01 1.59860e+00 648 2019 3 5.50274e+01 1.59734e+00 604 2019 4 5.88129e+01 9.61412e-01 512 2019 5 5.99361e+01 6.26437e-02 256 2019 6 5.98073e+01 1.99043e-01 315 2019 7 5.96339e+01 3.42279e-02 128 2019 8 5.83320e+01 5.88427e-01 347 2019 9 5.62152e+01 3.73370e-01 256 2019 10 4.95290e+01 1.80164e+00 702 2019 11 4.35218e+01 1.45844e+00 1052 2019 12 3.98249e+01 4.03083e-01 822 2020 1 4.22515e+01 1.57949e+00 678 2020 2 4.73861e+01 1.92142e+00 714 2020 3 5.39956e+01 1.95466e+00 505 2020 4 5.87416e+01 8.32264e-01 704 2020 5 6.00003e+01 2.01670e-01 383 2020 6 5.96699e+01 8.25731e-02 448 2020 7 5.96554e+01 5.23333e-02 140 2020 8 5.86892e+01 5.31764e-01 283 2020 9 5.49706e+01 9.76940e-01 452 2020 10 4.93505e+01 1.11941e+00 482 2020 11 4.28750e+01 1.46653e+00 619 2020 12 3.97588e+01 3.29683e-01 1006 2021 1 4.17933e+01 1.36495e+00 872 2021 2 4.79961e+01 2.04662e+00 706 2021 3 5.44167e+01 1.54798e+00 837 2021 4 5.91333e+01 7.23990e-01 505 2021 5 5.99778e+01 1.60234e-01 256 2021 6 nan nan 0 2021 7 5.95900e+01 4.50034e-02 187 2021 8 5.86571e+01 6.03077e-01 256 2021 9 5.38664e+01 6.50287e-01 314 2021 10 4.86466e+01 2.14235e+00 532 2021 11 4.30659e+01 1.65349e+00 1097 2021 12 3.98084e+01 3.17699e-01 755 2022 1 4.19663e+01 1.38494e+00 1078 2022 2 4.82456e+01 2.24341e+00 829 2022 3 5.41284e+01 1.45094e+00 474 2022 4 5.96597e+01 8.45383e-02 128 2022 5 6.00069e+01 1.56188e-01 382 2022 6 5.97770e+01 2.77724e-01 320 2022 7 5.94936e+01 1.81194e-02 128 2022 8 5.82854e+01 5.22225e-01 304 2022 9 5.53514e+01 1.50924e+00 448 2022 10 5.01149e+01 1.40395e+00 571 2022 11 4.23774e+01 1.31657e+00 810 2022 12 3.98748e+01 3.44777e-01 990 2023 1 4.18060e+01 1.50151e+00 1113 2023 2 4.84979e+01 2.27314e+00 629 2023 3 5.38920e+01 1.79360e+00 613 2023 4 5.91177e+01 7.79594e-01 448 2023 5 5.99784e+01 1.42777e-01 312 2023 6 5.98138e+01 2.40164e-01 192 2023 7 5.94321e+01 1.62863e-01 103 2023 8 5.77088e+01 4.92649e-01 201 2023 9 5.54842e+01 1.52864e+00 320 2023 10 4.98978e+01 1.75672e+00 354 2023 11 4.32826e+01 1.73961e+00 704 2023 12 3.99701e+01 4.11723e-01 875 2024 1 4.15287e+01 1.14834e+00 764 2024 2 4.76948e+01 1.61640e+00 706 2024 3 5.45166e+01 1.40604e+00 567 2024 4 5.83661e+01 6.28316e-01 357 2024 5 6.00626e+01 6.92756e-02 207 2024 6 5.96362e+01 1.39827e-01 192 2024 7 5.97197e+01 5.22075e-03 61 2024 8 5.78293e+01 6.93534e-01 319 2024 9 5.48103e+01 5.40499e-01 254 2024 10 5.04907e+01 1.58981e+00 378 2024 11 4.49866e+01 5.04386e-01 128