Quarter	Percent, Seasonally Adjusted
1999-01-01	59.0025508131150
1999-04-01	58.7751256418546
1999-07-01	58.7234273023582
1999-10-01	58.6408293273722
2000-01-01	58.7299750656929
2000-04-01	58.3742327884290
2000-07-01	58.3464958408454
2000-10-01	58.3858651920390
2001-01-01	58.2628854990195
2001-04-01	58.6258997347502
2001-07-01	58.5294104864580
2001-10-01	58.8764460921882
2002-01-01	58.8896313400924
2002-04-01	58.8137569670016
2002-07-01	58.9673742084097
2002-10-01	59.1214956109915
2003-01-01	59.4441125452275
2003-04-01	59.6062805282858
2003-07-01	59.4116019924438
2003-10-01	59.3557986855960
2004-01-01	57.8724741785098
2004-04-01	57.9408947392625
2004-07-01	57.9504515887521
2004-10-01	57.9442193776611
2005-01-01	58.1521466869634
2005-04-01	58.4332373136840
2005-07-01	58.7666177668850
2005-10-01	58.8780951072703
2006-01-01	58.8813366154903
2006-04-01	59.0254677334636
2006-07-01	59.1634244519403
2006-10-01	59.2580571018120
2007-01-01	59.5730157745181
2007-04-01	59.8426369767844
2007-07-01	60.2509102148523
2007-10-01	60.0772518462610
2008-01-01	60.1889837154008
2008-04-01	60.1454224710489
2008-07-01	60.0542165852587
2008-10-01	60.3025020428349
2009-01-01	60.2474952049155
2009-04-01	60.4482560902215
2009-07-01	60.5601138104786
2009-10-01	60.5236194791128
2010-01-01	60.3537319912830
2010-04-01	60.3832526073762
2010-07-01	60.4298960410202
2010-10-01	60.4194897398051
2011-01-01	60.5275649662989
2011-04-01	60.4146184300282
2011-07-01	60.4130790222050
2011-10-01	60.6006463594602
2012-01-01	60.5675047427809
2012-04-01	60.8087432864453
2012-07-01	60.8278392278995
2012-10-01	60.8452779419090
2013-01-01	60.9380759712212
2013-04-01	60.9005925920231
2013-07-01	61.0094681771990
2013-10-01	60.8333214686438
2014-01-01	60.8159780167996
2014-04-01	60.7653984919458
2014-07-01	60.5683967683155
2014-10-01	60.6255814212672
2015-01-01	60.5645884970209
2015-04-01	60.6301805627128
2015-07-01	60.7588450126464
2015-10-01	60.9347344781366
2016-01-01	61.0785878999518
2016-04-01	61.2119304169978
2016-07-01	61.3598532306555
2016-10-01	61.1782056362654
2017-01-01	61.1473053397747
2017-04-01	61.2273287809546
2017-07-01	61.1491502241499
2017-10-01	61.3525679580098
2018-01-01	61.3131931903652
2018-04-01	61.2736061402681