YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 2.10794e+01 6.06208e-01 32 2000 3 2.32239e+01 7.94510e-01 85 2000 4 2.50644e+01 1.52204e+00 78 2000 5 2.67479e+01 1.98277e+00 71 2000 6 2.68831e+01 1.75473e+00 66 2000 7 2.87457e+01 1.54427e+00 45 2000 8 2.86902e+01 1.38875e+00 66 2000 9 2.89090e+01 2.94347e+00 44 2000 10 2.61436e+01 2.66651e+00 61 2000 11 2.46358e+01 1.78630e+00 20 2000 12 2.39070e+01 1.21975e+00 25 2001 1 2.11674e+01 8.59009e-01 25 2001 2 2.22023e+01 1.66987e+00 85 2001 3 2.06120e+01 1.15343e+00 32 2001 4 2.55432e+01 2.17073e+00 80 2001 5 2.54335e+01 2.07974e+00 71 2001 6 2.87968e+01 2.07841e+00 51 2001 7 2.90062e+01 2.27332e+00 69 2001 8 2.98927e+01 2.31153e+00 75 2001 9 2.90509e+01 3.09651e+00 34 2001 10 2.58614e+01 1.44046e+00 32 2001 11 2.38859e+01 8.17011e-01 27 2001 12 2.37748e+01 7.89262e-01 62 2002 1 2.28004e+01 1.83718e+00 94 2002 2 2.03344e+01 7.03462e-01 8 2002 3 2.37401e+01 9.70507e-01 55 2002 4 2.83051e+01 6.54460e-01 52 2002 5 2.69860e+01 2.44954e+00 107 2002 6 2.79575e+01 6.09821e-02 16 2002 7 2.90770e+01 2.33335e+00 348 2002 8 3.03233e+01 1.34124e+00 353 2002 9 2.93824e+01 1.47729e+00 324 2002 10 2.86229e+01 1.52746e+00 660 2002 11 2.54990e+01 2.16581e+00 303 2002 12 2.16472e+01 1.54732e+00 306 2003 1 1.88177e+01 2.67705e+00 202 2003 2 2.23326e+01 1.73340e+00 418 2003 3 2.65281e+01 1.50636e+00 344 2003 4 2.45467e+01 2.45539e+00 310 2003 5 2.83690e+01 2.21368e+00 452 2003 6 2.95258e+01 1.73181e+00 183 2003 7 3.00156e+01 1.51774e+00 379 2003 8 3.03273e+01 1.78495e+00 312 2003 9 2.98242e+01 1.41718e+00 344 2003 10 2.80495e+01 1.69366e+00 521 2003 11 2.39913e+01 1.29990e+00 373 2003 12 1.98014e+01 1.88777e+00 236 2004 1 2.03231e+01 1.80684e+00 292 2004 2 2.21677e+01 2.17030e+00 265 2004 3 2.28616e+01 1.86826e+00 271 2004 4 2.40225e+01 1.94696e+00 377 2004 5 2.73162e+01 2.18907e+00 474 2004 6 3.06489e+01 2.00218e+00 461 2004 7 3.05526e+01 1.69252e+00 515 2004 8 3.05752e+01 1.99307e+00 309 2004 9 2.81666e+01 1.96037e+00 290 2004 10 2.68586e+01 1.53849e+00 486 2004 11 2.40167e+01 1.50464e+00 451 2004 12 2.15798e+01 2.09994e+00 273 2005 1 2.03843e+01 2.20371e+00 487 2005 2 2.05316e+01 2.03145e+00 293 2005 3 2.28948e+01 2.92020e+00 272 2005 4 2.37685e+01 1.66490e+00 478 2005 5 2.66712e+01 2.23336e+00 408 2005 6 2.90941e+01 1.18775e+00 205 2005 7 3.04461e+01 1.62629e+00 382 2005 8 3.13730e+01 1.61528e+00 484 2005 9 3.00029e+01 1.93735e+00 410 2005 10 2.73327e+01 2.76370e+00 225 2005 11 2.38571e+01 1.56239e+00 465 2005 12 2.12270e+01 1.80444e+00 354 2006 1 2.02660e+01 1.91396e+00 358 2006 2 2.09961e+01 2.00316e+00 394 2006 3 2.28066e+01 1.77227e+00 466 2006 4 2.53818e+01 2.29877e+00 427 2006 5 2.68996e+01 2.40204e+00 467 2006 6 2.95813e+01 2.08574e+00 340 2006 7 2.97585e+01 1.68225e+00 390 2006 8 2.99272e+01 1.91714e+00 251 2006 9 2.96806e+01 1.24825e+00 344 2006 10 2.79171e+01 2.08716e+00 531 2006 11 2.23696e+01 1.91066e+00 240 2006 12 2.29333e+01 1.46283e+00 209 2007 1 2.23997e+01 1.62754e+00 386 2007 2 2.03278e+01 1.89359e+00 212 2007 3 2.25651e+01 1.50847e+00 317 2007 4 2.42817e+01 2.19035e+00 462 2007 5 2.61714e+01 1.98307e+00 332 2007 6 2.87000e+01 1.97379e+00 382 2007 7 3.10750e+01 1.92608e+00 408 2007 8 3.08132e+01 1.66267e+00 612 2007 9 2.95776e+01 1.88476e+00 385 2007 10 2.74733e+01 1.69071e+00 322 2007 11 2.38421e+01 1.71719e+00 461 2007 12 2.35820e+01 1.47427e+00 505 2008 1 2.16081e+01 1.59262e+00 287 2008 2 2.36562e+01 1.62405e+00 301 2008 3 2.32646e+01 1.81400e+00 229 2008 4 2.50000e+01 2.03372e+00 452 2008 5 2.75208e+01 1.61018e+00 595 2008 6 2.87207e+01 1.84427e+00 402 2008 7 3.04864e+01 1.82511e+00 415 2008 8 3.01868e+01 2.13931e+00 448 2008 9 2.88071e+01 1.38313e+00 293 2008 10 2.66515e+01 1.90250e+00 369 2008 11 2.27427e+01 2.20352e+00 363 2008 12 2.17953e+01 1.68251e+00 370 2009 1 2.07105e+01 1.70613e+00 431 2009 2 2.08398e+01 1.90164e+00 344 2009 3 2.24231e+01 2.01585e+00 303 2009 4 2.49806e+01 1.76892e+00 358 2009 5 2.73456e+01 2.30625e+00 517 2009 6 3.03967e+01 1.89690e+00 282 2009 7 3.02758e+01 1.63267e+00 325 2009 8 3.08279e+01 1.52256e+00 649 2009 9 2.95931e+01 1.64707e+00 289 2009 10 2.92011e+01 2.24098e+00 560 2009 11 2.55997e+01 2.70180e+00 332 2009 12 2.43949e+01 2.06970e+00 210 2010 1 1.94709e+01 1.86940e+00 180 2010 2 1.93742e+01 1.86702e+00 233 2010 3 1.98722e+01 2.48990e+00 268 2010 4 2.41007e+01 1.98965e+00 328 2010 5 2.82583e+01 2.01750e+00 537 2010 6 3.12960e+01 1.70074e+00 469 2010 7 3.00613e+01 2.27913e+00 355 2010 8 3.14260e+01 1.84142e+00 396 2010 9 2.91766e+01 1.44228e+00 498 2010 10 2.67179e+01 1.83531e+00 464 2010 11 2.43416e+01 1.64626e+00 345 2010 12 1.95766e+01 2.27797e+00 336 2011 1 1.96743e+01 1.97830e+00 309 2011 2 2.22301e+01 1.79710e+00 477 2011 3 2.37213e+01 2.01332e+00 466 2011 4 2.72242e+01 1.64441e+00 556 2011 5 2.84703e+01 2.08395e+00 439 2011 6 2.92021e+01 2.45501e+00 448 2011 7 3.03098e+01 1.97875e+00 369 2011 8 3.00523e+01 1.97228e+00 438 2011 9 2.99326e+01 1.74035e+00 482 2011 10 2.67359e+01 2.25659e+00 175 2011 11 2.35233e+01 1.57712e+00 498 2011 12 2.26490e+01 1.48031e+00 328 2012 1 2.03530e+01 1.97623e+00 315 2012 2 2.32179e+01 2.06317e+00 256 2012 3 2.32074e+01 1.85535e+00 389 2012 4 2.48794e+01 2.66540e+00 371 2012 5 2.70002e+01 2.27023e+00 430 2012 6 2.87984e+01 2.03181e+00 309 2012 7 2.96578e+01 1.81495e+00 502 2012 8 3.01708e+01 1.56107e+00 394 2012 9 2.95976e+01 1.52868e+00 290 2012 10 2.70443e+01 2.17707e+00 437 2012 11 2.21217e+01 1.73320e+00 309 2012 12 2.21855e+01 1.65936e+00 339 2013 1 2.26409e+01 1.52789e+00 450 2013 2 2.22997e+01 1.99474e+00 317 2013 3 2.07899e+01 1.44174e+00 280 2013 4 2.56026e+01 2.05735e+00 390 2013 5 2.70774e+01 2.19143e+00 514 2013 6 2.95644e+01 1.88937e+00 291 2013 7 2.92626e+01 1.83546e+00 291 2013 8 2.99887e+01 1.71798e+00 382 2013 9 2.92256e+01 1.49295e+00 352 2013 10 2.75293e+01 2.12422e+00 449 2013 11 2.47163e+01 2.16280e+00 242 2013 12 2.30715e+01 1.45084e+00 391 2014 1 2.10654e+01 2.23789e+00 306 2014 2 2.36874e+01 1.95786e+00 460 2014 3 2.41603e+01 1.62431e+00 281 2014 4 2.61760e+01 2.47025e+00 415 2014 5 2.71380e+01 1.97083e+00 506 2014 6 2.97954e+01 2.29522e+00 410 2014 7 2.98028e+01 1.61093e+00 368 2014 8 3.15543e+01 1.66915e+00 602 2014 9 2.94387e+01 1.61725e+00 227 2014 10 2.76338e+01 1.77141e+00 471 2014 11 2.35640e+01 2.06739e+00 475 2014 12 2.19840e+01 1.69977e+00 374 2015 1 2.22081e+01 2.31845e+00 344 2015 2 1.99036e+01 1.39080e+00 262 2015 3 2.51050e+01 1.92634e+00 569 2015 4 2.66252e+01 2.46763e+00 476 2015 5 2.79637e+01 2.08850e+00 590 2015 6 3.01625e+01 1.80985e+00 375 2015 7 3.04379e+01 1.95589e+00 373 2015 8 3.07862e+01 1.60954e+00 421 2015 9 2.92816e+01 1.89037e+00 169 2015 10 2.77547e+01 1.99546e+00 391 2015 11 2.70710e+01 2.33770e+00 498 2015 12 2.45119e+01 1.31782e+00 272 2016 1 2.18750e+01 2.33069e+00 80 2016 2 2.13475e+01 1.88879e+00 230 2016 3 2.32159e+01 2.05722e+00 205 2016 4 2.50661e+01 1.74099e+00 493 2016 5 2.73744e+01 1.74641e+00 347 2016 6 3.02552e+01 1.72381e+00 347 2016 7 3.14367e+01 1.68542e+00 535 2016 8 3.13745e+01 2.02347e+00 313 2016 9 3.03052e+01 1.65121e+00 460 2016 10 2.73532e+01 1.96295e+00 289 2016 11 2.41191e+01 1.61228e+00 387 2016 12 2.45802e+01 1.20115e+00 485 2017 1 2.24822e+01 1.51593e+00 347 2017 2 2.27654e+01 1.75555e+00 490 2017 3 2.30921e+01 2.02736e+00 434 2017 4 2.55163e+01 1.64797e+00 206 2017 5 2.80386e+01 2.09781e+00 584 2017 6 2.91739e+01 1.90458e+00 234 2017 7 3.08131e+01 1.45547e+00 499 2017 8 3.12985e+01 2.31478e+00 512 2017 9 2.95651e+01 1.76985e+00 450 2017 10 2.77569e+01 1.66879e+00 286 2017 11 2.49959e+01 1.72909e+00 610 2017 12 2.34877e+01 1.69124e+00 511 2018 1 2.10950e+01 1.51259e+00 225 2018 2 2.36587e+01 2.00990e+00 384 2018 3 2.26989e+01 1.70768e+00 508 2018 4 2.56159e+01 1.67310e+00 408 2018 5 2.70287e+01 2.00352e+00 168 2018 6 2.99986e+01 1.70485e+00 239 2018 7 3.06984e+01 2.08969e+00 414 2018 8 3.05629e+01 1.36369e+00 566 2018 9 3.06490e+01 1.85134e+00 507 2018 10 2.84530e+01 1.71639e+00 536 2018 11 2.64478e+01 1.68942e+00 398 2018 12 2.25068e+01 2.15612e+00 242 2019 1 2.18041e+01 1.82614e+00 383 2019 2 2.43423e+01 2.32795e+00 455 2019 3 2.45426e+01 1.83609e+00 379 2019 4 2.65952e+01 1.62514e+00 521 2019 5 2.83387e+01 1.93458e+00 616 2019 6 3.04315e+01 1.69414e+00 456 2019 7 3.07353e+01 1.90718e+00 345 2019 8 3.04432e+01 1.53991e+00 395 2019 9 2.92591e+01 1.72329e+00 465 2019 10 2.83487e+01 1.40230e+00 490 2019 11 2.61770e+01 2.49964e+00 379 2019 12 2.31722e+01 1.26484e+00 415 2020 1 2.28073e+01 1.38581e+00 398 2020 2 2.33372e+01 1.90256e+00 307 2020 3 2.55051e+01 2.31025e+00 508 2020 4 2.76161e+01 1.70335e+00 310 2020 5 2.72342e+01 2.59487e+00 385 2020 6 3.06031e+01 1.93915e+00 443 2020 7 3.12296e+01 1.72206e+00 485 2020 8 3.13286e+01 1.57660e+00 458 2020 9 3.05150e+01 1.40119e+00 480 2020 10 2.93277e+01 1.72874e+00 390 2020 11 2.54384e+01 1.79273e+00 302 2020 12 2.27768e+01 1.41013e+00 237 2021 1 2.20784e+01 1.52309e+00 327 2021 2 2.34802e+01 2.72841e+00 483 2021 3 2.53075e+01 1.89659e+00 401 2021 4 2.62000e+01 2.05693e+00 462 2021 5 2.80334e+01 2.00316e+00 549 2021 6 2.95427e+01 2.26687e+00 196 2021 7 3.06034e+01 1.47083e+00 498 2021 8 3.11914e+01 1.61580e+00 424 2021 9 3.00893e+01 1.30859e+00 403 2021 10 2.77897e+01 1.62195e+00 426 2021 11 2.36398e+01 1.42463e+00 298 2021 12 2.43540e+01 1.61974e+00 567 2022 1 2.18402e+01 1.86292e+00 232 2022 2 2.30836e+01 1.87316e+00 384 2022 3 2.52015e+01 1.83572e+00 499 2022 4 2.66712e+01 1.79386e+00 268 2022 5 2.92626e+01 1.81961e+00 551 2022 6 3.03486e+01 2.03472e+00 493 2022 7 3.10468e+01 1.51392e+00 553 2022 8 3.07259e+01 1.59924e+00 541 2022 9 3.08402e+01 1.90805e+00 480 2022 10 2.69603e+01 1.78068e+00 513 2022 11 2.66134e+01 1.35704e+00 525 2022 12 2.41975e+01 1.40027e+00 376 2023 1 2.25212e+01 2.00386e+00 644 2023 2 2.47003e+01 1.64746e+00 590 2023 3 2.51163e+01 1.80158e+00 506 2023 4 2.78742e+01 1.53867e+00 348 2023 5 2.84405e+01 1.90925e+00 507 2023 6 2.99698e+01 1.34742e+00 376 2023 7 3.18074e+01 1.47019e+00 346 2023 8 3.10025e+01 1.60275e+00 457 2023 9 3.05988e+01 1.77905e+00 461 2023 10 2.75885e+01 2.36582e+00 573 2023 11 2.53509e+01 1.76496e+00 322 2023 12 2.23215e+01 1.62659e+00 184 2024 1 2.17930e+01 2.07733e+00 281 2024 2 2.13568e+01 1.27594e+00 396 2024 3 2.48070e+01 1.57494e+00 348 2024 4 2.54564e+01 5.61300e-01 32