Quarter	Percent, Seasonally Adjusted
1999-01-01	16.8672263105519
1999-04-01	16.6599291399382
1999-07-01	16.1361748317122
1999-10-01	16.2566744911852
2000-01-01	15.4529163600373
2000-04-01	15.3920870044232
2000-07-01	15.3737218090894
2000-10-01	14.9681587115920
2001-01-01	15.4400325968226
2001-04-01	16.0100513149609
2001-07-01	16.3798238221960
2001-10-01	16.4769023323528
2002-01-01	16.6717333074752
2002-04-01	16.4153433679417
2002-07-01	16.4063360355762
2002-10-01	16.6476185233350
2003-01-01	16.3851028318243
2003-04-01	16.0903181681935
2003-07-01	16.6446445830304
2003-10-01	16.4787958315392
2004-01-01	16.6181034229029
2004-04-01	16.3436696802227
2004-07-01	16.0249169245042
2004-10-01	15.8446933430166
2005-01-01	15.7731002014675
2005-04-01	15.3959093482623
2005-07-01	15.1342206425534
2005-10-01	14.7128165234840
2006-01-01	14.6338269627824
2006-04-01	14.3231322409808
2006-07-01	14.2042576821578
2006-10-01	14.5494410308636
2007-01-01	14.3132668450220
2007-04-01	14.3801757797834
2007-07-01	14.4481294666955
2007-10-01	14.4271667839566
2008-01-01	14.5318738485096
2008-04-01	14.5385433351971
2008-07-01	14.3931447156960
2008-10-01	15.5999958608576
2009-01-01	17.2586381393282
2009-04-01	17.5062345856907
2009-07-01	17.1684383742456
2009-10-01	16.7093156328715
2010-01-01	16.4176839965525
2010-04-01	16.1018002818603
2010-07-01	15.8369077981518
2010-10-01	15.7922046475955
2011-01-01	15.1791662316146
2011-04-01	15.1103152017690
2011-07-01	15.1718629182813
2011-10-01	15.2305912791801
2012-01-01	15.2090963404735
2012-04-01	15.5250104711408
2012-07-01	15.7190263304874
2012-10-01	15.7630268709575
2013-01-01	15.8878107142998
2013-04-01	16.0899310903902
2013-07-01	16.0076054778996
2013-10-01	16.1491327593746
2014-01-01	16.2522324115239
2014-04-01	16.3473697129762
2014-07-01	16.4539353435470
2014-10-01	16.4118072365106
2015-01-01	16.7447755522918
2015-04-01	16.8404675621289
2015-07-01	17.0274705198889
2015-10-01	17.5412811026049
2016-01-01	17.6657506290125
2016-04-01	17.6228663492220
2016-07-01	17.5212076124265
2016-10-01	17.5902637696659
2017-01-01	17.3299124203465
2017-04-01	17.1821726308397
2017-07-01	17.3430875324624
2017-10-01	17.0603837718779
2018-01-01	16.9298294910480