Quarter	Percent, Seasonally Adjusted
1998-04-01	78.0448048148458
1999-04-01	78.4270787711944
2000-04-01	78.3393501805054
2001-04-01	79.1484445911379
2002-04-01	78.8755102040816
2003-04-01	77.9174074672701
2004-04-01	77.3959710040450
2005-04-01	77.1954561703142
2006-04-01	77.9385385661627
2007-04-01	78.5904411476886
2008-04-01	79.5034418748550
2009-04-01	79.0212993358272
2010-01-01	77.0673569931983
2010-04-01	77.0317813067791
2010-07-01	77.4683589261311
2010-10-01	77.6204980905763
2011-01-01	78.2874690140199
2011-04-01	78.4106157220098
2011-07-01	78.2024311977409
2011-10-01	78.4751709085976
2012-01-01	78.6149288968054
2012-04-01	78.5046790645910
2012-07-01	78.7328871370883
2012-10-01	78.1261399581890
2013-01-01	78.3817656183522
2013-04-01	78.2474160969534
2013-07-01	78.3338181922471
2013-10-01	78.5462182158269
2014-01-01	78.2544039530125
2014-04-01	78.5324112552964
2014-07-01	78.6382187712272
2014-10-01	79.5979455167970
2015-01-01	79.4630724653545
2015-04-01	79.0641915194153
2015-07-01	78.8916828743603
2015-10-01	79.3390313065564
2016-01-01	79.8212299585344
2016-04-01	79.3442184635458
2016-07-01	79.3805886563826
2016-10-01	79.8797689378192
2017-01-01	79.7463770096944
2017-04-01	79.6177832186386
2017-07-01	79.7945609052894
2017-10-01	79.9779830562230
2018-01-01	79.9297730275051
2018-04-01	79.6886720161132