Quarter	Percent, Seasonally Adjusted
1998-04-01	83.3000000000000
1999-04-01	83.1000000000000
2000-04-01	82.9000000000000
2001-04-01	82.6000000000000
2002-04-01	82.2000000000000
2003-04-01	82.1000000000000
2004-04-01	81.4000000000000
2005-04-01	80.7000000000000
2006-04-01	81.0000000000000
2007-04-01	81.6000000000000
2008-04-01	81.3000000000000
2009-04-01	81.0000000000000
2010-01-01	79.9296479053314
2010-04-01	80.2677859467193
2010-07-01	80.2529872384097
2010-10-01	80.0640930525930
2011-01-01	80.5602299533622
2011-04-01	80.5353114033882
2011-07-01	80.6051431559429
2011-10-01	80.4844537429630
2012-01-01	80.2921364924301
2012-04-01	80.2587608942166
2012-07-01	80.5474718196271
2012-10-01	80.6409497210610
2013-01-01	80.4237047686324
2013-04-01	80.0609907642424
2013-07-01	79.8925021154830
2013-10-01	79.9068706531488
2014-01-01	79.9553167431682
2014-04-01	80.3638242057018
2014-07-01	80.0139657355871
2014-10-01	80.0289885659249
2015-01-01	80.1857419345649
2015-04-01	80.1415536779501
2015-07-01	80.2076633396533
2015-10-01	80.6568188680537
2016-01-01	80.5651804539738
2016-04-01	80.2969620598002
2016-07-01	80.6786220563015
2016-10-01	80.7419642639318
2017-01-01	80.8378280402335
2017-04-01	80.8912898409999
2017-07-01	80.9365317502886
2017-10-01	80.8559534335619
2018-01-01	80.9497810233871
2018-04-01	81.1800084486880