Quarter	Percent, Seasonally Adjusted
1998-04-01	78.5000000000000
1999-04-01	78.2000000000000
2000-04-01	77.8000000000000
2001-04-01	77.4000000000000
2002-04-01	76.7000000000000
2003-04-01	76.8000000000000
2004-04-01	76.0000000000000
2005-04-01	75.1000000000000
2006-04-01	75.4000000000000
2007-04-01	75.8000000000000
2008-04-01	75.5000000000000
2009-04-01	75.2000000000000
2010-01-01	74.1120800828968
2010-04-01	74.4255042100258
2010-07-01	74.4385882792662
2010-10-01	74.4134537640163
2011-01-01	74.7257899647406
2011-04-01	74.6388014653288
2011-07-01	74.6898982072011
2011-10-01	74.6813806396679
2012-01-01	74.4197454008432
2012-04-01	74.4057102649542
2012-07-01	74.5913413364314
2012-10-01	74.5506095347054
2013-01-01	74.4160288087668
2013-04-01	74.1808761466368
2013-07-01	74.0509904214345
2013-10-01	74.1114574685382
2014-01-01	74.0407657407487
2014-04-01	74.2943157389862
2014-07-01	74.1574411958536
2014-10-01	74.0814947888798
2015-01-01	74.2285770959267
2015-04-01	74.1576668292732
2015-07-01	74.1135469758768
2015-10-01	74.3906652883767
2016-01-01	74.4866419732214
2016-04-01	74.3967279990453
2016-07-01	74.6239707990346
2016-10-01	74.4908703042951
2017-01-01	74.4699279994439
2017-04-01	74.4967892101856
2017-07-01	74.4889568051331
2017-10-01	74.4387990205611
2018-01-01	74.4176080994907
2018-04-01	74.5264043921889