Quarter	Percent, Seasonally Adjusted
1999-04-01	58.5101482258832
1999-07-01	58.9347383576728
1999-10-01	59.1812383998735
2000-01-01	59.3585446896671
2000-04-01	59.5657692636092
2000-07-01	59.5714244393236
2000-10-01	59.5783086406215
2001-01-01	59.6996245780934
2001-04-01	59.7685538557242
2001-07-01	60.1599949525126
2001-10-01	60.0634715938996
2002-01-01	60.1445573318441
2002-04-01	60.0800288139463
2002-07-01	59.8973665876849
2002-10-01	60.0058037833569
2003-01-01	60.0421145750906
2003-04-01	60.1950474291020
2003-07-01	60.2654416784962
2003-10-01	60.4134224390811
2004-01-01	60.5993252037646
2004-04-01	60.5198595781711
2004-07-01	60.8067348968151
2004-10-01	61.2073602993570
2005-01-01	61.4042665122311
2005-04-01	61.8241940857782
2005-07-01	62.1938785461166
2005-10-01	62.4033730174177
2006-01-01	62.8011898334523
2006-04-01	62.9688760276223
2006-07-01	63.3789882651759
2006-10-01	63.5410185979655
2007-01-01	66.6254200342436
2007-04-01	66.7739209117937
2007-07-01	66.5828481120188
2007-10-01	66.5265134097391
2008-01-01	66.3919215213892
2008-04-01	66.0813000227693
2008-07-01	65.9598507468965
2008-10-01	65.3406471996277
2009-01-01	64.7436572331695
2009-04-01	64.4364115663323
2009-07-01	63.8185144479452
2009-10-01	63.3497363326862
2010-01-01	62.9192885997965
2010-04-01	62.7638104742177
2010-07-01	62.4476594087369
2010-10-01	62.2840922119944
2011-01-01	62.0603058766747
2011-04-01	62.0303435230633
2011-07-01	61.7584448773121
2011-10-01	62.0182891749327
2012-01-01	61.9150353202114
2012-04-01	61.5861601249730
2012-07-01	61.5850441568074
2012-10-01	61.4551106877905
2013-01-01	61.7394148728618
2013-04-01	62.0941714804202
2013-07-01	61.9951211528050
2013-10-01	62.0380976977146
2014-01-01	61.9274539369564
2014-04-01	61.5551326332478
2014-07-01	61.7912430379015
2014-10-01	61.7339135989251
2015-01-01	61.7545026838406
2015-04-01	61.8397951560101
2015-07-01	61.8141678713580
2015-10-01	61.9043160475762
2016-01-01	61.9854112779134
2016-04-01	62.4368612208200
2016-07-01	62.3231045038889
2016-10-01	62.0685232117361
2017-01-01	62.1028736821191
2017-04-01	61.7758617559992
2017-07-01	61.9182657642461
2017-10-01	62.1639658474564
2018-01-01	62.1434445476847
2018-04-01	62.2793789475454