Quarter	Percent, Seasonally Adjusted
1999-04-01	56.7169681217838
1999-07-01	57.3897232072238
1999-10-01	57.7418649992793
2000-01-01	57.8654780406787
2000-04-01	58.3425839197041
2000-07-01	58.1804448068271
2000-10-01	58.1216790176315
2001-01-01	58.0348994261640
2001-04-01	57.4488272776705
2001-07-01	57.3780310066917
2001-10-01	56.3989522488745
2002-01-01	56.0542710279794
2002-04-01	55.6838134595880
2002-07-01	55.3741193799499
2002-10-01	55.7026710452892
2003-01-01	55.9262786520017
2003-04-01	55.9898604597111
2003-07-01	55.9818439147797
2003-10-01	56.1323138813211
2004-01-01	55.9226397426519
2004-04-01	55.8724599140980
2004-07-01	56.0246401008886
2004-10-01	55.8047766699659
2005-01-01	55.9090087814762
2005-04-01	56.0511559408066
2005-07-01	56.8886721182257
2005-10-01	57.6030722346581
2006-01-01	58.4065602136697
2006-04-01	59.2515038722523
2006-07-01	60.1177009383252
2006-10-01	59.3703052720476
2007-01-01	76.2783777477632
2007-04-01	76.0212125094384
2007-07-01	72.9121679088605
2007-10-01	72.7015616643899
2008-01-01	72.1702661881500
2008-04-01	71.3231679661507
2008-07-01	70.6212439673460
2008-10-01	66.0245988026082
2009-01-01	64.8257848003953
2009-04-01	63.9965048308979
2009-07-01	61.3570130458228
2009-10-01	60.6331261973903
2010-01-01	58.1288267685588
2010-04-01	56.5311003456538
2010-07-01	55.1891418275008
2010-10-01	54.1547063001180
2011-01-01	53.7869253689366
2011-04-01	52.5131907091971
2011-07-01	52.4669413200360
2011-10-01	55.4910684006063
2012-01-01	51.8381787777608
2012-04-01	52.0999624644188
2012-07-01	51.9684292690122
2012-10-01	51.7805692669651
2013-01-01	51.6004757987473
2013-04-01	52.0062976857601
2013-07-01	51.6791844768075
2013-10-01	51.1526489273004
2014-01-01	50.6882087708820
2014-04-01	50.0697142411778
2014-07-01	49.8680042734906
2014-10-01	50.0669513108332
2015-01-01	50.6527290042284
2015-04-01	49.7054268811392
2015-07-01	49.9704452395222
2015-10-01	50.3473922206821
2016-01-01	51.0263290730970
2016-04-01	53.7073625220060
2016-07-01	53.8745190747042
2016-10-01	52.2377074282969
2017-01-01	49.6112783641180
2017-04-01	49.0105414219525
2017-07-01	44.8810560001915
2017-10-01	48.1626576675829
2018-01-01	47.9308879816019
2018-04-01	47.9646703316094