Quarter	Percent, Seasonally Adjusted
1998-04-01	80.6603059215508
1999-04-01	80.8153567657264
2000-04-01	81.0007877264714
2001-04-01	81.1912926792903
2002-04-01	79.9165034913363
2003-04-01	78.9577619308832
2004-04-01	78.2054531629069
2005-04-01	77.5303861460686
2006-04-01	78.2061760420738
2007-04-01	79.2145931832616
2008-04-01	78.9950691020210
2009-04-01	77.9443327768882
2010-01-01	76.0492902793261
2010-04-01	76.5323797492703
2010-07-01	76.7788442899126
2010-10-01	76.6911021621132
2011-01-01	77.3262507974816
2011-04-01	77.1616257525460
2011-07-01	77.4575656839454
2011-10-01	77.0296789135604
2012-01-01	77.0881420290572
2012-04-01	77.0503726833490
2012-07-01	76.9679703654949
2012-10-01	76.7908887485513
2013-01-01	76.7394635716914
2013-04-01	76.3407895332023
2013-07-01	76.1276543091974
2013-10-01	76.2420845996569
2014-01-01	76.0680226694051
2014-04-01	76.3494865301446
2014-07-01	76.2032602062971
2014-10-01	76.6098423632054
2015-01-01	76.5949203473464
2015-04-01	76.3595585644866
2015-07-01	76.3432464365564
2015-10-01	76.6661284746598
2016-01-01	76.5611605292845
2016-04-01	76.3331237414597
2016-07-01	76.7192124259128
2016-10-01	76.9336288380946
2017-01-01	76.9237642777988
2017-04-01	77.3080329430359
2017-07-01	77.2185294428800
2017-10-01	77.1635887877452
2018-01-01	77.2514239422027
2018-04-01	77.5379233471591