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 6.18916e+01 3.15086e-01 363 2002 8 5.76768e+01 5.69359e-01 253 2002 9 5.09229e+01 1.34855e+00 163 2002 10 4.55362e+01 2.45481e+00 685 2002 11 3.98832e+01 7.18798e-01 259 2002 12 3.41101e+01 2.07144e-01 581 2003 1 3.67613e+01 9.43838e-01 83 2003 2 4.12497e+01 8.00866e-01 384 2003 3 5.13538e+01 2.21183e+00 700 2003 4 5.81231e+01 1.32289e+00 365 2003 5 6.12591e+01 5.27371e-01 519 2003 6 6.13696e+01 8.42393e-01 371 2003 7 6.16999e+01 4.80214e-01 384 2003 8 5.95098e+01 5.89233e-01 93 2003 9 5.35006e+01 1.82232e+00 296 2003 10 4.45180e+01 3.19830e+00 65 2003 11 3.91270e+01 2.00156e+00 73 2003 12 3.40671e+01 2.57166e-01 151 2004 1 3.67150e+01 1.21652e+00 686 2004 2 4.34803e+01 2.69552e+00 665 2004 3 5.21613e+01 2.44221e+00 802 2004 4 5.74512e+01 1.19417e+00 339 2004 5 6.15515e+01 5.17441e-01 184 2004 6 6.16292e+01 6.04506e-01 332 2004 7 6.19571e+01 3.54686e-01 330 2004 8 5.87711e+01 1.27963e+00 224 2004 9 5.13430e+01 1.54544e+00 233 2004 10 4.44059e+01 2.32689e+00 679 2004 11 3.78658e+01 1.56591e+00 702 2004 12 3.47036e+01 4.51181e-01 600 2005 1 3.65820e+01 1.77992e+00 846 2005 2 4.24147e+01 2.25760e+00 467 2005 3 5.17286e+01 1.91725e+00 328 2005 4 5.78567e+01 1.79931e+00 439 2005 5 6.17544e+01 5.60884e-01 273 2005 6 6.14105e+01 3.91022e-01 137 2005 7 6.18585e+01 9.20014e-01 258 2005 8 5.93104e+01 1.04407e+00 236 2005 9 5.26378e+01 2.06963e+00 558 2005 10 4.59616e+01 7.02492e-01 97 2005 11 3.84377e+01 1.93220e+00 438 2005 12 3.47140e+01 3.91847e-01 469 2006 1 3.76801e+01 1.47877e+00 233 2006 2 4.29803e+01 1.19387e+00 125 2006 3 5.12950e+01 1.84101e+00 731 2006 4 5.80426e+01 1.50283e+00 757 2006 5 6.14875e+01 5.45362e-01 320 2006 6 6.16529e+01 1.33400e-01 647 2006 7 6.12547e+01 3.86526e-01 233 2006 8 5.92195e+01 8.33380e-01 326 2006 9 5.29005e+01 1.81251e+00 474 2006 10 4.44756e+01 2.07743e+00 220 2006 11 3.67132e+01 1.44857e+00 512 2006 12 3.36962e+01 7.52396e-01 448 2007 1 3.61129e+01 1.46992e+00 796 2007 2 4.33308e+01 2.94403e+00 343 2007 3 5.11917e+01 2.07799e+00 680 2007 4 5.81809e+01 1.38045e+00 502 2007 5 6.11021e+01 5.03130e-01 394 2007 6 6.17423e+01 3.87798e-02 248 2007 7 6.18337e+01 3.90000e-01 553 2007 8 5.88513e+01 1.72052e+00 342 2007 9 5.27534e+01 2.10697e+00 386 2007 10 4.53723e+01 2.66151e+00 265 2007 11 3.79346e+01 1.16582e+00 391 2007 12 3.43872e+01 3.69842e-01 404 2008 1 3.75754e+01 1.55992e+00 451 2008 2 4.23537e+01 1.96313e+00 768 2008 3 5.31205e+01 1.96648e+00 311 2008 4 5.79184e+01 1.49342e+00 624 2008 5 6.15383e+01 4.34827e-01 388 2008 6 6.16707e+01 4.10468e-01 309 2008 7 6.15758e+01 5.10151e-01 328 2008 8 5.93149e+01 1.14650e+00 359 2008 9 5.40901e+01 1.31799e+00 395 2008 10 4.58963e+01 2.63006e+00 296 2008 11 3.80097e+01 1.79397e+00 622 2008 12 3.43174e+01 2.62442e-01 797 2009 1 3.53813e+01 4.65612e-01 383 2009 2 4.50010e+01 1.72117e+00 641 2009 3 5.14484e+01 1.74722e+00 576 2009 4 5.78330e+01 1.42884e+00 448 2009 5 6.14662e+01 5.12493e-01 514 2009 6 6.15047e+01 4.41880e-01 312 2009 7 6.16480e+01 1.65591e-01 131 2009 8 5.92213e+01 1.50136e+00 313 2009 9 5.27826e+01 2.11908e+00 461 2009 10 4.59698e+01 2.75722e+00 937 2009 11 3.71656e+01 1.96009e+00 377 2009 12 3.45284e+01 3.23928e-01 497 2010 1 3.79352e+01 1.19485e+00 443 2010 2 4.16382e+01 1.29147e-01 60 2010 3 5.29766e+01 2.15110e+00 301 2010 4 5.83051e+01 1.48615e+00 625 2010 5 6.08466e+01 1.03290e+00 276 2010 6 6.15663e+01 4.63006e-01 620 2010 7 6.14699e+01 2.20274e-01 233 2010 8 5.93306e+01 9.64637e-01 489 2010 9 5.48251e+01 1.13615e+00 385 2010 10 4.56308e+01 2.53544e+00 526 2010 11 3.84949e+01 1.62731e+00 883 2010 12 3.43557e+01 2.64664e-01 501 2011 1 3.56851e+01 1.04026e+00 288 2011 2 4.09052e+01 2.54411e-01 262 2011 3 5.33341e+01 1.38646e+00 614 2011 4 5.79917e+01 1.32097e+00 768 2011 5 6.13861e+01 6.64854e-01 681 2011 6 6.17106e+01 1.02008e-01 383 2011 7 6.15059e+01 4.01233e-01 322 2011 8 5.98426e+01 7.54016e-01 500 2011 9 5.40189e+01 1.21689e+00 512 2011 10 4.98032e+01 4.31726e-01 93 2011 11 3.88113e+01 1.71773e+00 730 2011 12 3.44350e+01 3.61458e-01 718 2012 1 3.68778e+01 1.31385e+00 640 2012 2 4.53048e+01 2.02792e+00 429 2012 3 5.19182e+01 2.28310e+00 509 2012 4 5.77369e+01 1.17207e+00 479 2012 5 6.12798e+01 6.53144e-01 325 2012 6 6.13171e+01 4.09665e-01 384 2012 7 6.23218e+01 2.92854e-01 24 2012 8 5.97141e+01 2.59375e-01 66 2012 9 5.39314e+01 1.61159e+00 417 2012 10 4.71940e+01 1.43827e+00 386 2012 11 3.84973e+01 1.62093e+00 636 2012 12 3.45045e+01 5.16233e-01 528 2013 1 3.66277e+01 1.51382e+00 736 2013 2 4.37881e+01 2.40954e+00 798 2013 3 5.24891e+01 2.36328e+00 418 2013 4 5.84145e+01 1.05272e+00 569 2013 5 6.16024e+01 4.25534e-01 510 2013 6 6.17042e+01 7.25102e-02 263 2013 7 6.18856e+01 5.23329e-01 344 2013 8 5.91840e+01 1.33806e+00 214 2013 9 5.23714e+01 1.77593e+00 476 2013 10 4.40645e+01 2.05106e+00 647 2013 11 3.81505e+01 2.04842e+00 666 2013 12 3.45349e+01 6.27195e-01 446 2014 1 3.73218e+01 1.70082e+00 448 2014 2 4.33660e+01 2.16086e+00 854 2014 3 5.15209e+01 2.05485e+00 599 2014 4 5.83735e+01 1.71403e+00 448 2014 5 6.12921e+01 4.77034e-01 427 2014 6 6.15154e+01 4.90259e-01 279 2014 7 6.22098e+01 3.64048e-01 383 2014 8 5.88136e+01 9.73705e-01 199 2014 9 5.27319e+01 2.25477e+00 205 2014 10 4.65266e+01 2.56422e+00 514 2014 11 3.81939e+01 1.53990e+00 627 2014 12 3.44967e+01 4.66512e-01 678 2015 1 3.59060e+01 1.09513e+00 440 2015 2 4.37058e+01 2.02669e+00 513 2015 3 5.09902e+01 2.12958e+00 989 2015 4 5.67630e+01 7.39665e-01 448 2015 5 6.15544e+01 6.07379e-01 415 2015 6 6.15585e+01 1.91918e-01 458 2015 7 6.18696e+01 2.76693e-01 251 2015 8 5.93314e+01 1.19868e+00 470 2015 9 5.32380e+01 2.11620e+00 464 2015 10 4.53808e+01 1.72024e+00 343 2015 11 3.71649e+01 1.67294e+00 203 2015 12 3.43448e+01 5.46217e-02 192 2016 1 3.48549e+01 1.81098e-01 11 2016 2 4.34768e+01 2.31351e+00 512 2016 3 5.10754e+01 2.45028e+00 384 2016 4 5.85568e+01 1.50637e+00 464 2016 5 6.08184e+01 5.41637e-01 146 2016 6 6.13244e+01 5.19028e-01 488 2016 7 6.15871e+01 3.12779e-01 265 2016 8 5.88074e+01 1.19746e+00 239 2016 9 5.35294e+01 2.64327e+00 225 2016 10 4.72126e+01 1.56786e+00 140 2016 11 3.83651e+01 1.60156e+00 855 2016 12 3.42791e+01 2.75896e-01 421 2017 1 3.61856e+01 9.88975e-01 461 2017 2 4.33107e+01 1.06146e-01 94 2017 3 5.23817e+01 2.20446e+00 524 2017 4 5.79974e+01 1.92930e+00 384 2017 5 6.14015e+01 7.00311e-01 506 2017 6 6.16215e+01 9.37095e-02 365 2017 7 6.19948e+01 6.15774e-01 261 2017 8 5.90016e+01 1.03080e+00 444 2017 9 5.33439e+01 2.00872e+00 272 2017 10 4.61399e+01 2.29483e+00 139 2017 11 3.64738e+01 6.31291e-01 349 2017 12 3.42782e+01 3.86137e-01 622 2018 1 3.63988e+01 8.86863e-01 134 2018 2 4.53643e+01 9.47400e-01 286 2018 3 5.09626e+01 2.73376e+00 717 2018 4 5.80825e+01 1.36850e+00 310 2018 5 6.16920e+01 2.32908e-01 119 2018 6 6.17325e+01 3.14811e-01 438 2018 7 6.17147e+01 8.47665e-01 360 2018 8 5.90695e+01 1.45627e+00 162 2018 9 5.26481e+01 1.54821e+00 493 2018 10 4.35381e+01 1.74972e+00 289 2018 11 3.87311e+01 4.79767e-01 120 2018 12 3.45998e+01 4.20067e-01 606 2019 1 3.57644e+01 1.00082e+00 408 2019 2 4.39548e+01 2.18604e+00 880 2019 3 5.14841e+01 2.65195e+00 749 2019 4 5.77989e+01 1.28860e+00 356 2019 5 6.15300e+01 6.12458e-01 208 2019 6 6.16867e+01 2.91659e-01 498 2019 7 6.15949e+01 3.61589e-01 588 2019 8 5.88871e+01 1.01985e+00 308 2019 9 5.30136e+01 2.45377e+00 403 2019 10 4.47329e+01 1.72683e+00 533 2019 11 3.82921e+01 2.02001e+00 700 2019 12 3.44997e+01 5.30820e-01 555 2020 1 3.60047e+01 1.69546e+00 508 2020 2 4.60978e+01 1.46434e+00 107 2020 3 5.23851e+01 2.04589e+00 676 2020 4 5.75907e+01 1.31945e+00 398 2020 5 6.12667e+01 4.04753e-01 331 2020 6 6.16593e+01 1.07618e-01 399 2020 7 6.19702e+01 4.42304e-01 316 2020 8 5.86319e+01 1.71565e+00 284 2020 9 5.27490e+01 2.47582e+00 363 2020 10 4.51812e+01 2.69600e+00 184 2020 11 3.62356e+01 7.15458e-01 315 2020 12 3.43517e+01 4.03695e-01 563 2021 1 3.74736e+01 1.70667e+00 271 2021 2 4.61737e+01 1.15848e+00 447 2021 3 5.02394e+01 1.82811e+00 483 2021 4 5.85979e+01 1.50432e+00 576 2021 5 6.15421e+01 6.81859e-01 419 2021 6 6.16881e+01 3.58134e-01 188 2021 7 6.13713e+01 4.62943e-01 414 2021 8 5.98083e+01 9.27629e-01 337 2021 9 5.15612e+01 1.03508e+00 437 2021 10 4.63383e+01 1.92797e+00 315 2021 11 3.70255e+01 1.55695e+00 321 2021 12 3.44022e+01 3.31905e-01 881 2022 1 3.59439e+01 1.80406e+00 622 2022 2 4.49365e+01 2.61342e+00 721 2022 3 5.21412e+01 2.49727e+00 582 2022 4 5.95440e+01 6.60109e-01 256 2022 5 6.11036e+01 4.51318e-01 438 2022 6 6.16375e+01 1.21269e-01 365 2022 7 6.19559e+01 2.00789e-01 82 2022 8 5.85285e+01 6.14202e-01 365 2022 9 5.36472e+01 1.89405e+00 330 2022 10 4.50481e+01 2.76906e+00 686 2022 11 3.84299e+01 1.87822e+00 666 2022 12 3.44728e+01 3.70244e-01 712 2023 1 3.59955e+01 1.48477e+00 703 2023 2 4.43689e+01 2.51671e+00 1012 2023 3 5.16456e+01 2.39110e+00 486 2023 4 5.66849e+01 7.48798e-01 139 2023 5 6.13113e+01 4.99924e-01 544 2023 6 6.15913e+01 1.66551e-01 541 2023 7 6.19213e+01 5.35506e-01 556 2023 8 5.94100e+01 1.19696e+00 314 2023 9 5.39159e+01 1.24014e+00 521 2023 10 4.41311e+01 2.13831e+00 429 2023 11 3.78874e+01 1.29335e+00 270 2023 12 3.41616e+01 7.28532e-01 268 2024 1 3.65650e+01 1.57727e+00 440 2024 2 4.41347e+01 1.85149e+00 728 2024 3 5.22887e+01 2.23285e+00 502 2024 4 5.61620e+01 9.34661e-02 64