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 6.16821e+01 1.11292e-01 256 2002 8 5.87901e+01 9.81264e-01 176 2002 9 5.23311e+01 1.83984e+00 480 2002 10 4.50338e+01 2.68719e+00 781 2002 11 3.86042e+01 1.75176e+00 460 2002 12 3.35735e+01 4.61193e-01 306 2003 1 3.57448e+01 1.70026e+00 708 2003 2 4.17077e+01 1.80034e+00 574 2003 3 5.06358e+01 2.27348e+00 710 2003 4 5.78236e+01 1.41871e+00 428 2003 5 6.13916e+01 6.72107e-01 444 2003 6 6.23688e+01 6.08168e-02 140 2003 7 6.16341e+01 2.17176e-01 250 2003 8 5.89387e+01 9.92646e-01 363 2003 9 5.31654e+01 1.45141e+00 443 2003 10 4.47976e+01 2.01056e+00 749 2003 11 3.64906e+01 1.46667e+00 475 2003 12 3.33382e+01 2.38301e-01 371 2004 1 3.60568e+01 1.51056e+00 439 2004 2 4.42778e+01 2.72410e+00 658 2004 3 5.03513e+01 2.11456e+00 409 2004 4 5.73700e+01 1.20014e+00 502 2004 5 6.17933e+01 6.70046e-01 261 2004 6 6.23837e+01 9.68496e-02 741 2004 7 6.17992e+01 5.29137e-01 522 2004 8 5.75258e+01 1.20832e+00 350 2004 9 5.11214e+01 1.60594e+00 353 2004 10 4.53076e+01 2.43750e+00 685 2004 11 3.80617e+01 1.73580e+00 452 2004 12 3.32504e+01 1.30227e-01 324 2005 1 3.62390e+01 1.42031e+00 676 2005 2 4.26372e+01 1.78983e+00 464 2005 3 5.11769e+01 2.38887e+00 512 2005 4 5.74571e+01 1.28634e+00 448 2005 5 6.19260e+01 3.70432e-01 464 2005 6 6.22735e+01 7.74602e-02 138 2005 7 6.17225e+01 5.16746e-01 363 2005 8 5.83038e+01 1.31436e+00 512 2005 9 5.30699e+01 1.92921e+00 592 2005 10 4.62308e+01 2.07633e+00 585 2005 11 3.68422e+01 2.06482e+00 540 2005 12 3.34591e+01 3.79977e-01 822 2006 1 3.45075e+01 7.21067e-01 461 2006 2 4.31506e+01 1.97340e+00 576 2006 3 5.13159e+01 2.54388e+00 574 2006 4 5.77085e+01 1.56241e+00 560 2006 5 6.13775e+01 5.93928e-01 444 2006 6 6.25591e+01 1.10527e-01 192 2006 7 6.12719e+01 4.66085e-01 251 2006 8 5.78962e+01 9.84556e-01 287 2006 9 5.24431e+01 1.66237e+00 500 2006 10 4.50806e+01 1.85904e+00 352 2006 11 3.67041e+01 1.40463e+00 517 2006 12 3.37373e+01 4.39728e-01 132 2007 1 3.67453e+01 1.80714e+00 368 2007 2 4.37477e+01 1.50123e+00 512 2007 3 5.06921e+01 2.05213e+00 379 2007 4 5.67571e+01 1.11724e+00 515 2007 5 6.10596e+01 5.81266e-01 321 2007 6 6.25088e+01 8.57764e-02 422 2007 7 6.17552e+01 3.29120e-01 415 2007 8 5.86634e+01 1.62392e+00 397 2007 9 5.31936e+01 2.13072e+00 329 2007 10 4.67096e+01 1.53321e+00 271 2007 11 3.75682e+01 1.77487e+00 744 2007 12 3.36944e+01 4.62231e-01 478 2008 1 3.62538e+01 2.18805e+00 378 2008 2 4.31360e+01 2.89295e+00 619 2008 3 5.19315e+01 2.58504e+00 267 2008 4 5.80646e+01 1.48301e+00 369 2008 5 6.11385e+01 5.41604e-01 304 2008 6 6.24697e+01 1.17366e-01 264 2008 7 6.10808e+01 5.72436e-01 354 2008 8 5.90602e+01 1.21646e+00 448 2008 9 5.24978e+01 1.54380e+00 377 2008 10 4.61908e+01 2.38261e+00 534 2008 11 3.66426e+01 2.11660e+00 562 2008 12 3.34224e+01 3.73210e-01 363 2009 1 3.61994e+01 1.66708e+00 681 2009 2 4.31871e+01 2.05449e+00 625 2009 3 4.97729e+01 1.54941e+00 439 2009 4 5.78261e+01 1.27284e+00 378 2009 5 6.09253e+01 3.21747e-01 383 2009 6 6.25265e+01 1.32879e-01 386 2009 7 6.19020e+01 2.97899e-01 86 2009 8 5.91715e+01 1.42955e+00 556 2009 9 5.21419e+01 1.17224e+00 181 2009 10 4.51606e+01 2.67056e+00 789 2009 11 3.71466e+01 1.56326e+00 579 2009 12 3.33806e+01 1.85372e-01 385 2010 1 3.59520e+01 1.33849e+00 309 2010 2 4.40907e+01 2.18910e+00 448 2010 3 5.13611e+01 2.56305e+00 564 2010 4 5.69482e+01 1.32767e+00 406 2010 5 6.13274e+01 6.49932e-01 455 2010 6 6.24089e+01 1.06318e-01 598 2010 7 6.13455e+01 6.15930e-01 393 2010 8 5.87370e+01 1.48905e+00 434 2010 9 5.46430e+01 1.38110e+00 207 2010 10 4.66526e+01 2.30318e+00 664 2010 11 3.78192e+01 1.63642e+00 622 2010 12 3.35556e+01 4.51076e-01 683 2011 1 3.58768e+01 2.05961e+00 449 2011 2 4.36389e+01 2.08478e+00 559 2011 3 5.15201e+01 2.21495e+00 885 2011 4 5.76062e+01 1.39387e+00 690 2011 5 6.16760e+01 4.38777e-01 576 2011 6 6.25301e+01 1.12109e-01 332 2011 7 6.13814e+01 4.43660e-01 599 2011 8 5.87898e+01 1.56286e+00 257 2011 9 5.21282e+01 1.57446e+00 453 2011 10 4.67850e+01 1.58844e+00 381 2011 11 3.81493e+01 2.00738e+00 484 2011 12 3.35842e+01 5.60885e-01 496 2012 1 3.49872e+01 8.88017e-01 447 2012 2 4.53244e+01 1.10091e+00 493 2012 3 5.28933e+01 2.37483e+00 200 2012 4 5.72976e+01 1.39687e+00 408 2012 5 6.13464e+01 6.03986e-01 317 2012 6 6.24577e+01 1.01890e-01 256 2012 7 6.15039e+01 6.96092e-01 462 2012 8 5.83242e+01 1.35195e+00 256 2012 9 5.29526e+01 2.69549e+00 352 2012 10 4.41835e+01 2.32563e+00 662 2012 11 3.77644e+01 1.89021e+00 758 2012 12 3.32106e+01 1.38344e-01 275 2013 1 3.56167e+01 1.73548e+00 448 2013 2 4.30564e+01 2.64926e+00 602 2013 3 5.12134e+01 2.35671e+00 595 2013 4 5.76607e+01 1.56390e+00 207 2013 5 6.13134e+01 3.67148e-01 382 2013 6 6.24969e+01 1.92242e-01 189 2013 7 6.13615e+01 6.38010e-01 405 2013 8 5.84034e+01 1.16903e+00 353 2013 9 5.25483e+01 1.51539e+00 245 2013 10 4.50984e+01 1.97553e+00 721 2013 11 3.72743e+01 1.95560e+00 253 2013 12 3.36067e+01 4.86829e-01 564 2014 1 3.66115e+01 1.02613e+00 569 2014 2 4.28638e+01 2.15088e+00 741 2014 3 4.97740e+01 1.71193e+00 586 2014 4 5.85268e+01 1.44077e+00 539 2014 5 6.09518e+01 5.22843e-01 306 2014 6 6.24118e+01 8.95752e-02 531 2014 7 6.10691e+01 3.03323e-01 317 2014 8 5.88649e+01 1.32920e+00 512 2014 9 5.18037e+01 1.80080e+00 133 2014 10 4.50865e+01 2.78085e+00 562 2014 11 3.79850e+01 1.99753e+00 611 2014 12 3.34451e+01 2.87459e-01 437 2015 1 3.60246e+01 1.74087e+00 624 2015 2 4.31206e+01 2.02281e+00 647 2015 3 5.06851e+01 2.33229e+00 880 2015 4 5.69013e+01 1.10182e+00 280 2015 5 6.11390e+01 6.03016e-01 530 2015 6 6.23497e+01 1.12217e-01 348 2015 7 6.16823e+01 3.38637e-01 491 2015 8 5.88803e+01 1.36640e+00 400 2015 9 5.33570e+01 2.53544e+00 247 2015 10 4.55036e+01 2.65167e+00 396 2015 11 3.79538e+01 1.41754e+00 376 2015 12 3.30657e+01 1.13359e-01 200 2016 1 3.61818e+01 1.94189e+00 190 2016 2 4.37708e+01 2.81599e+00 512 2016 3 4.95612e+01 1.40784e+00 276 2016 4 5.71832e+01 1.45470e+00 565 2016 5 6.13357e+01 3.54298e-01 297 2016 6 6.22013e+01 9.73674e-02 313 2016 7 6.16236e+01 6.03168e-01 605 2016 8 5.86294e+01 1.14004e+00 384 2016 9 5.21211e+01 1.47892e+00 571 2016 10 4.61693e+01 1.67655e+00 283 2016 11 3.73397e+01 1.30923e+00 467 2016 12 3.33208e+01 2.71485e-01 480 2017 1 3.65747e+01 1.36483e+00 461 2017 2 4.30009e+01 2.19580e+00 465 2017 3 5.14798e+01 2.19151e+00 430 2017 4 5.88457e+01 1.42538e+00 286 2017 5 6.14166e+01 6.42509e-01 576 2017 6 6.24164e+01 1.39807e-01 274 2017 7 6.16736e+01 4.04965e-01 627 2017 8 5.89036e+01 9.55406e-01 532 2017 9 5.29984e+01 1.79919e+00 544 2017 10 4.52528e+01 2.74777e+00 414 2017 11 3.76299e+01 2.11005e+00 637 2017 12 3.33097e+01 3.15768e-01 1105 2018 1 3.51637e+01 1.51378e+00 432 2018 2 4.43474e+01 1.94655e+00 675 2018 3 5.09023e+01 2.32377e+00 687 2018 4 5.74536e+01 1.37696e+00 343 2018 5 6.07034e+01 1.85754e-01 146 2018 6 6.23258e+01 7.48047e-02 313 2018 7 6.15350e+01 3.84758e-01 391 2018 8 5.88142e+01 1.11077e+00 510 2018 9 5.23622e+01 1.28021e+00 422 2018 10 4.48103e+01 2.17663e+00 544 2018 11 3.78520e+01 1.66596e+00 341 2018 12 3.33402e+01 3.34163e-01 556 2019 1 3.52333e+01 1.30153e+00 640 2019 2 4.28988e+01 2.83621e+00 905 2019 3 5.20073e+01 2.56396e+00 469 2019 4 5.79235e+01 1.57294e+00 444 2019 5 6.11380e+01 6.54206e-01 395 2019 6 6.24155e+01 1.00559e-01 643 2019 7 6.12772e+01 4.06792e-01 514 2019 8 5.83561e+01 1.07157e+00 377 2019 9 5.23143e+01 9.42039e-01 340 2019 10 4.48333e+01 2.55959e+00 715 2019 11 3.75056e+01 1.91906e+00 805 2019 12 3.38037e+01 5.33183e-01 446 2020 1 3.57813e+01 1.64887e+00 832 2020 2 4.29900e+01 2.54441e+00 456 2020 3 5.24013e+01 1.94718e+00 565 2020 4 5.74124e+01 1.79372e+00 448 2020 5 6.14451e+01 6.47569e-01 414 2020 6 6.23753e+01 8.59648e-02 256 2020 7 6.18232e+01 5.76707e-01 365 2020 8 5.82934e+01 1.18026e+00 789 2020 9 5.29395e+01 1.89166e+00 300 2020 10 4.50466e+01 2.63363e+00 542 2020 11 3.65581e+01 8.43714e-01 191 2020 12 3.33315e+01 7.95024e-01 475 2021 1 3.56754e+01 1.68968e+00 671 2021 2 4.37097e+01 2.84888e+00 401 2021 3 5.11787e+01 2.99768e+00 704 2021 4 5.81979e+01 1.23209e+00 361 2021 5 6.08022e+01 7.08739e-01 218 2021 6 6.24038e+01 8.69402e-02 254 2021 7 6.13490e+01 5.25870e-01 422 2021 8 5.85642e+01 1.31946e+00 399 2021 9 5.17171e+01 2.04724e+00 448 2021 10 4.53886e+01 2.53459e+00 374 2021 11 3.62484e+01 1.76658e+00 580 2021 12 3.35232e+01 4.44294e-01 784 2022 1 3.59647e+01 1.79505e+00 640 2022 2 4.36684e+01 2.74235e+00 513 2022 3 5.07626e+01 1.22403e+00 132 2022 4 5.89506e+01 7.79863e-01 168 2022 5 6.11324e+01 7.02715e-01 556 2022 6 6.23186e+01 1.21603e-01 366 2022 7 6.18135e+01 3.67711e-01 640 2022 8 5.83900e+01 1.52197e+00 446 2022 9 5.27558e+01 1.95892e+00 546 2022 10 4.39050e+01 2.22805e+00 557 2022 11 3.76702e+01 2.13279e+00 689 2022 12 3.33010e+01 3.56543e-01 355 2023 1 3.52973e+01 1.22078e+00 820 2023 2 4.39873e+01 2.51494e+00 829 2023 3 5.01604e+01 2.56497e+00 610 2023 4 5.76905e+01 1.46320e+00 311 2023 5 6.09913e+01 4.64858e-01 500 2023 6 6.24403e+01 8.76865e-02 443 2023 7 6.15987e+01 6.79557e-01 256 2023 8 5.87654e+01 1.19752e+00 393 2023 9 5.38246e+01 9.14139e-01 284 2023 10 4.46480e+01 2.37016e+00 348 2023 11 3.69427e+01 1.75232e+00 269 2023 12 3.32609e+01 3.66662e-01 320 2024 1 3.66503e+01 1.93909e+00 229 2024 2 4.36814e+01 2.31127e+00 517 2024 3 5.20055e+01 2.08956e+00 421 2024 4 5.57906e+01 7.94421e-03 64