Quarter	Percent, Seasonally Adjusted
1999-01-01	80.8242175731767
1999-04-01	80.6144058323204
1999-07-01	80.4120352209152
1999-10-01	80.3314810378114
2000-01-01	80.6404207189573
2000-04-01	80.0578904625897
2000-07-01	79.7625862562040
2000-10-01	79.7534644457101
2001-01-01	79.5327247388149
2001-04-01	79.4238766488136
2001-07-01	79.4566319218909
2001-10-01	79.3840864243950
2002-01-01	79.8946014700207
2002-04-01	79.5127846034399
2002-07-01	79.3315873761406
2002-10-01	79.5871859541814
2003-01-01	80.2810525218780
2003-04-01	79.8221518064535
2003-07-01	79.5057952881544
2003-10-01	79.8262484747596
2004-01-01	77.3306969850136
2004-04-01	77.4538678171450
2004-07-01	77.3877590054181
2004-10-01	77.2181771168656
2005-01-01	77.2324612839922
2005-04-01	78.0057074168657
2005-07-01	78.4168493448870
2005-10-01	78.4802814838721
2006-01-01	78.5679865757030
2006-04-01	78.8138867192754
2006-07-01	79.1587529374959
2006-10-01	78.9742108049129
2007-01-01	79.5492302554833
2007-04-01	80.0556809567184
2007-07-01	80.3953670070409
2007-10-01	79.8494129763095
2008-01-01	80.4928778571683
2008-04-01	80.0672336504019
2008-07-01	79.6402236115448
2008-10-01	79.8214707080104
2009-01-01	79.6151468713425
2009-04-01	79.8244695062288
2009-07-01	80.1260252357067
2009-10-01	80.4211616428499
2010-01-01	79.8958992645664
2010-04-01	79.8592339067014
2010-07-01	80.1475213883960
2010-10-01	80.1716631126948
2011-01-01	79.9648759408096
2011-04-01	80.0142281029293
2011-07-01	79.8028009351559
2011-10-01	79.8581803605887
2012-01-01	79.8615388729589
2012-04-01	80.4654137777436
2012-07-01	80.2898173030833
2012-10-01	80.3387896521772
2013-01-01	80.5875148878749
2013-04-01	80.4929116598756
2013-07-01	80.4022249491337
2013-10-01	80.1861631128587
2014-01-01	79.8861354544128
2014-04-01	79.8785251282078
2014-07-01	80.1397193868602
2014-10-01	80.0903855764494
2015-01-01	80.2362209774456
2015-04-01	79.9905777945039
2015-07-01	80.0707986696806
2015-10-01	80.1920014864407
2016-01-01	80.5891196800573
2016-04-01	80.6641578237681
2016-07-01	80.9668600028146
2016-10-01	80.5962585168346
2017-01-01	80.7265721216310
2017-04-01	80.9600824307870
2017-07-01	80.8924456921407
2017-10-01	81.5157176459644
2018-01-01	81.5552134998810
2018-04-01	81.6369942705478