Quarter	Percent, Seasonally Adjusted
1999-01-01	61.1941615688393
1999-04-01	60.8565429850529
1999-07-01	60.3913799629178
1999-10-01	59.7864726076522
2000-01-01	59.6012865182574
2000-04-01	59.2875886430458
2000-07-01	58.9528273791586
2000-10-01	58.7868442991837
2001-01-01	60.4492513450026
2001-04-01	60.4456899696410
2001-07-01	59.9192014010752
2001-10-01	59.5679898142849
2002-01-01	58.5296578301399
2002-04-01	57.9002206381537
2002-07-01	57.4547258786048
2002-10-01	57.2422591508073
2003-01-01	56.8257565338410
2003-04-01	56.4167434304478
2003-07-01	55.8269550751162
2003-10-01	55.5545612458502
2004-01-01	55.3684101917627
2004-04-01	55.0418695111850
2004-07-01	54.5949056231122
2004-10-01	54.2042872174552
2005-01-01	54.0202745658374
2005-04-01	53.4581253742396
2005-07-01	53.4729975740036
2005-10-01	53.0816440868164
2006-01-01	52.6001027555128
2006-04-01	52.1652701066044
2006-07-01	52.0805969147621
2006-10-01	51.5378709056026
2007-01-01	51.4276738530301
2007-04-01	51.2811308888929
2007-07-01	50.8099965518414
2007-10-01	50.6503243982722
2008-01-01	50.3380274049017
2008-04-01	49.8874670213717
2008-07-01	49.5228511492746
2008-10-01	48.8547995344890
2009-01-01	48.6560914910861
2009-04-01	48.6436462922482
2009-07-01	48.4653044348091
2009-10-01	48.4478259705157
2010-01-01	48.1102846647011
2010-04-01	47.9874379538262
2010-07-01	47.7158402889876
2010-10-01	47.5659653167115
2011-01-01	47.4804086753353
2011-04-01	47.0700013949299
2011-07-01	47.0424655166914
2011-10-01	47.1426070694254
2012-01-01	46.6389295006845
2012-04-01	46.6591823744936
2012-07-01	46.4126133522114
2012-10-01	46.5429373393215
2013-01-01	46.4630512027278
2013-04-01	46.6807749812838
2013-07-01	46.6561962569281
2013-10-01	46.6605140088908
2014-01-01	46.7997485238783
2014-04-01	46.9789750182160
2014-07-01	47.0800708819992
2014-10-01	46.7085356846710
2015-01-01	46.9957930942527
2015-04-01	46.6727537955148
2015-07-01	47.0152169419644
2015-10-01	46.8450501591777
2016-01-01	46.8886810229140
2016-04-01	46.8088875337071
2016-07-01	46.8581243311303
2016-10-01	47.2687911523506
2017-01-01	47.3047039668428
2017-04-01	47.4744713995087
2017-07-01	47.3606607930527
2017-10-01	47.3562462619578
2018-01-01	47.6123477727512
2018-04-01	47.4957337106544
2018-07-01	47.5777315966239