Quarter	Percent, Seasonally Adjusted
1998-04-01	71.9000000000000
1999-04-01	72.2000000000000
2000-04-01	71.6000000000000
2001-04-01	73.2000000000000
2002-04-01	73.9000000000000
2003-04-01	74.1000000000000
2004-04-01	73.9000000000000
2005-04-01	74.3000000000000
2006-04-01	74.7000000000000
2007-04-01	75.0000000000000
2008-04-01	76.6000000000000
2009-04-01	77.1000000000000
2010-01-01	75.3005660511209
2010-04-01	74.9808982449014
2010-07-01	75.5657521817171
2010-10-01	75.3239891900007
2011-01-01	76.1190576983797
2011-04-01	75.9979275440408
2011-07-01	76.1078723543345
2011-10-01	76.8521767414306
2012-01-01	76.6097266050087
2012-04-01	76.5000541468201
2012-07-01	77.0988633029265
2012-10-01	76.6326127071110
2013-01-01	76.9357152634310
2013-04-01	76.9363353207622
2013-07-01	77.0778747993592
2013-10-01	77.3620815284068
2014-01-01	77.3080091638334
2014-04-01	77.8151268667914
2014-07-01	77.9003246071876
2014-10-01	79.2317086052398
2015-01-01	78.4163746062823
2015-04-01	78.2848745107464
2015-07-01	78.4880785838724
2015-10-01	79.3870296690558
2016-01-01	80.0369133272589
2016-04-01	79.0785047774922
2016-07-01	79.0763087315120
2016-10-01	79.8142066819766
2017-01-01	79.5358086354591
2017-04-01	78.7673513204500
2017-07-01	79.3396344494124
2017-10-01	79.7016256797859
2018-01-01	79.7129084648959
2018-04-01	79.3354699101656