Quarter	Percent, Seasonally Adjusted
1999-01-01	80.5994333880946
1999-04-01	80.7099609381701
1999-07-01	80.7742607448784
1999-10-01	80.1408119727002
2000-01-01	80.2794159893314
2000-04-01	80.0443851179430
2000-07-01	79.4522779841936
2000-10-01	80.0682864500973
2001-01-01	79.5663976345991
2001-04-01	79.2282921234233
2001-07-01	80.0703629077142
2001-10-01	80.6414059548713
2002-01-01	79.5757522401015
2002-04-01	79.9375175177806
2002-07-01	79.3627420234408
2002-10-01	79.3981525428740
2003-01-01	79.0841410483344
2003-04-01	79.4854698961736
2003-07-01	79.8819547682638
2003-10-01	79.5025038209419
2004-01-01	79.7783056470146
2004-04-01	80.2521756962862
2004-07-01	80.7396356921350
2004-10-01	79.7974281972018
2005-01-01	80.2146947409595
2005-04-01	79.3986222963627
2005-07-01	79.3887995195600
2005-10-01	80.2205775582032
2006-01-01	80.5615432697661
2006-04-01	80.1425299114710
2006-07-01	80.6136516626735
2006-10-01	80.9025456892594
2007-01-01	80.8204880066656
2007-04-01	80.1758724655560
2007-07-01	79.6435336243247
2007-10-01	79.6918815115959
2008-01-01	79.9553702900969
2008-04-01	80.6994114505584
2008-07-01	80.9731703586128
2008-10-01	81.0495455056484
2009-01-01	80.6641272595167
2009-04-01	80.5977979808348
2009-07-01	80.3410646430354
2009-10-01	79.3659321726904
2010-01-01	79.6531321220469
2010-04-01	79.6373263806549
2010-07-01	79.0935415728102
2010-10-01	79.0643184959240
2011-01-01	79.4142733585159
2011-04-01	79.2363838201010
2011-07-01	79.2431757215835
2011-10-01	79.1533336155406
2012-01-01	79.1684068639605
2012-04-01	79.1048684605467
2012-07-01	78.1680974085509
2012-10-01	78.1276671529905
2013-01-01	78.5690331774040
2013-04-01	78.3369853498023
2013-07-01	78.0395717751638
2013-10-01	77.5550482398850
2014-01-01	77.5533619881630
2014-04-01	77.6692649449431
2014-07-01	78.3770518772317
2014-10-01	78.7011123130493
2015-01-01	78.6483089598995
2015-04-01	78.3291996997359
2015-07-01	78.1257954942211
2015-10-01	78.7221815859604
2016-01-01	79.9625863783353
2016-04-01	80.2154203952954
2016-07-01	79.8776609865846
2016-10-01	79.7580394139356
2017-01-01	78.8324962032624
2017-04-01	78.5709294473438
2017-07-01	79.0616119466232
2017-10-01	78.8933129183112
2018-01-01	79.0257490565920
2018-04-01	79.6176812455128