Quarter	Percent, Seasonally Adjusted
1999-01-01	56.2702754011119
1999-04-01	56.4517413872722
1999-07-01	56.7103285261660
1999-10-01	55.9469821970998
2000-01-01	57.5246254092578
2000-04-01	57.1919172610050
2000-07-01	56.2463062968554
2000-10-01	56.7868421991515
2001-01-01	57.2338704558453
2001-04-01	56.7851746052086
2001-07-01	57.7260000012143
2001-10-01	58.0567505581113
2002-01-01	57.4038053527564
2002-04-01	57.6220979662126
2002-07-01	56.5414377147262
2002-10-01	56.9132925055653
2003-01-01	55.6959254126962
2003-04-01	56.2443984047889
2003-07-01	56.5345943657272
2003-10-01	56.2864346159560
2004-01-01	56.3974823169593
2004-04-01	57.0659806633898
2004-07-01	57.7256690606644
2004-10-01	56.8818547692284
2005-01-01	57.0737107909093
2005-04-01	56.3058829928636
2005-07-01	57.0614211920517
2005-10-01	58.3773776241104
2006-01-01	57.9692609445045
2006-04-01	57.9686175395782
2006-07-01	58.4519106804610
2006-10-01	58.2915402500769
2007-01-01	58.3774643224649
2007-04-01	58.2148991176901
2007-07-01	57.7904315076613
2007-10-01	58.0833403793999
2008-01-01	58.3877088332375
2008-04-01	58.6761691584184
2008-07-01	58.5530864111968
2008-10-01	59.0754330704658
2009-01-01	58.3506559074264
2009-04-01	57.7672013997107
2009-07-01	57.4378527521951
2009-10-01	56.0754941051972
2010-01-01	56.3891859051909
2010-04-01	56.4564967708079
2010-07-01	55.8943131664911
2010-10-01	55.0143335473197
2011-01-01	55.2789772151271
2011-04-01	55.5251469046462
2011-07-01	55.2323873157078
2011-10-01	54.6392480673530
2012-01-01	54.8997007613700
2012-04-01	54.7584799950206
2012-07-01	54.5424531992130
2012-10-01	54.1837288394812
2013-01-01	54.1134928935590
2013-04-01	54.4963820175892
2013-07-01	54.7397657860182
2013-10-01	53.9542141717863
2014-01-01	53.3139698338174
2014-04-01	53.6861700660294
2014-07-01	54.3956387409144
2014-10-01	54.9716199021046
2015-01-01	54.5108249060407
2015-04-01	53.8179337416962
2015-07-01	53.6731393435833
2015-10-01	54.3247560031348
2016-01-01	55.8559764967464
2016-04-01	55.9623157134120
2016-07-01	55.0470168547416
2016-10-01	55.0858205718759
2017-01-01	54.7321244434324
2017-04-01	54.5086535279840
2017-07-01	54.9910771212702
2017-10-01	54.9055960623650
2018-01-01	55.3332247865834
2018-04-01	55.5983285805055