Quarter	Percent, Seasonally Adjusted
1998-01-01	16.25704384000720
1998-04-01	16.34923750569660
1998-07-01	16.27150915435830
1998-10-01	16.44334068672650
1999-01-01	16.07082614354150
1999-04-01	16.09916932614660
1999-07-01	15.66240154307910
1999-10-01	15.12210442971360
2000-01-01	15.09847589125410
2000-04-01	14.72274709212560
2000-07-01	14.48436695358920
2000-10-01	13.73149451595930
2001-01-01	13.48541089712160
2001-04-01	12.97368866403240
2001-07-01	12.94806384665230
2001-10-01	12.56657942877580
2002-01-01	12.26100497123580
2002-04-01	12.59041352873650
2002-07-01	12.18099496872800
2002-10-01	11.91131164163250
2003-01-01	11.62323133873020
2003-04-01	12.00769931357410
2003-07-01	11.73952547264650
2003-10-01	11.16481394150600
2004-01-01	11.09319388977370
2004-04-01	10.39046864699610
2004-07-01	10.27874062000500
2004-10-01	10.19102664498710
2005-01-01	10.08337273443340
2005-04-01	9.91036257390239
2005-07-01	10.00185429174800
2005-10-01	10.21410685907430
2006-01-01	9.48706104905229
2006-04-01	8.75616400477647
2006-07-01	8.47356677513527
2006-10-01	8.41962977151963
2007-01-01	7.61327843678434
2007-04-01	7.60679138798505
2007-07-01	7.96445737284659
2007-10-01	8.19742702147542
2008-01-01	8.49173959684879
2008-04-01	8.84884808960982
2008-07-01	8.49157135809632
2008-10-01	8.17851701346099
2009-01-01	8.93609345666600
2009-04-01	9.01628518947682
2009-07-01	9.25255722080595
2009-10-01	9.71981414721144
2010-01-01	9.84228878974316
2010-04-01	9.67646170868366
2010-07-01	9.40717309512628
2010-10-01	9.50609502066568
2011-01-01	8.98738382686500
2011-04-01	9.15224510876680
2011-07-01	9.73962716228805
2011-10-01	10.32130052539620
2012-01-01	11.34795344280410
2012-04-01	11.70427843282630
2012-07-01	11.98969857529420
2012-10-01	12.30438929968060
2013-01-01	13.01099651970740
2013-04-01	13.02402862110140
2013-07-01	13.07425488272050
2013-10-01	13.20246996069620
2014-01-01	13.61731266719290
2014-04-01	13.56186579438420
2014-07-01	13.90269826606180
2014-10-01	14.15854621082880
2015-01-01	13.08876340503020
2015-04-01	13.05365813239580
2015-07-01	12.32259728661860
2015-10-01	12.35292737342250
2016-01-01	12.30907931268380
2016-04-01	13.00155662763130
2016-07-01	12.88701958954540
2016-10-01	12.95528344786610
2017-01-01	12.67443962971840
2017-04-01	12.32668995083870
2017-07-01	12.65238799802250
2017-10-01	11.95676298430280
2018-01-01	12.22615208525950
2018-04-01	12.02830476096910