Quarter	Percent, Seasonally Adjusted
1998-04-01	41.8226307783877
1999-04-01	41.8161471875720
2000-04-01	42.3659502077404
2001-04-01	41.1726490173786
2002-04-01	40.6979357282738
2003-04-01	40.5381337065072
2004-04-01	40.8870255957635
2005-04-01	40.6605424321960
2006-04-01	40.2374015992066
2007-04-01	40.0589916121302
2008-04-01	38.7059573305818
2009-04-01	38.4343661128574
2010-01-01	40.0335058396024
2010-04-01	40.1277366292048
2010-07-01	39.8352625451669
2010-10-01	40.0959933307470
2011-01-01	39.6136346721126
2011-04-01	39.5794443120021
2011-07-01	39.6532359108083
2011-10-01	39.0049364741273
2012-01-01	39.2219613448094
2012-04-01	39.2696342327324
2012-07-01	38.9450821439061
2012-10-01	39.2299609923626
2013-01-01	39.0461000955780
2013-04-01	38.9675628398849
2013-07-01	38.8222284966197
2013-10-01	38.5939130280260
2014-01-01	38.8176518843241
2014-04-01	38.3221014135909
2014-07-01	38.2045385536315
2014-10-01	37.0502871735834
2015-01-01	37.8151986884847
2015-04-01	37.9903823672637
2015-07-01	37.8811252539893
2015-10-01	37.1849686919689
2016-01-01	36.8853981336537
2016-04-01	37.3932256368621
2016-07-01	37.4332141788004
2016-10-01	36.9429235754636
2017-01-01	37.1266915466955
2017-04-01	37.5294964489426
2017-07-01	37.5862136316288
2017-10-01	37.3133489053788
2018-01-01	37.0237407536700
2018-04-01	37.3109120286462