Quarter	Percent, Seasonally Adjusted
1999-01-01	58.8397388472994
1999-04-01	58.6172366146053
1999-07-01	59.3652052882384
1999-10-01	60.1373973108921
2000-01-01	56.0863269479909
2000-04-01	55.5465739837329
2000-07-01	55.2953062044128
2000-10-01	54.6500867839607
2001-01-01	54.6301284731588
2001-04-01	54.6520770204936
2001-07-01	54.1027719730196
2001-10-01	54.5019325349832
2002-01-01	55.6330825670129
2002-04-01	54.9413638062802
2002-07-01	54.7206060121744
2002-10-01	54.9601155942142
2003-01-01	55.0093349566211
2003-04-01	55.4341556475334
2003-07-01	54.5745150999324
2003-10-01	55.0160246502018
2004-01-01	56.0767569232863
2004-04-01	56.3231447970071
2004-07-01	56.8636425601882
2004-10-01	57.4845563288474
2005-01-01	57.3566627492342
2005-04-01	58.2291348174197
2005-07-01	58.4448365818024
2005-10-01	57.9698901119821
2006-01-01	57.5154934374881
2006-04-01	57.6902121597272
2006-07-01	58.3396944142669
2006-10-01	58.1767903794049
2007-01-01	58.9093233721402
2007-04-01	59.7489014174229
2007-07-01	60.0560824069471
2007-10-01	58.9526833921923
2008-01-01	59.3515290838416
2008-04-01	59.0866187000045
2008-07-01	59.2249323125807
2008-10-01	60.3985063006379
2009-01-01	59.4586205050445
2009-04-01	59.7999205236123
2009-07-01	59.9038155243312
2009-10-01	58.8540111308351
2010-01-01	58.1858730341408
2010-04-01	57.8309770356326
2010-07-01	58.0604089768651
2010-10-01	59.0176154723879
2011-01-01	59.5067417900606
2011-04-01	59.4173420450878
2011-07-01	59.0476333473875
2011-10-01	58.8111980130275
2012-01-01	58.9613640325016
2012-04-01	59.3291523159281
2012-07-01	59.3776068066181
2012-10-01	59.2953346464894
2013-01-01	58.8259731498046
2013-04-01	59.1750357965493
2013-07-01	58.7557414630378
2013-10-01	58.3454477688900
2014-01-01	58.8132121042881
2014-04-01	57.8113557374341
2014-07-01	57.3268910877631
2014-10-01	58.1575445866981
2015-01-01	57.3767588313401
2015-04-01	57.4983598850320
2015-07-01	57.6954405097843
2015-10-01	57.1491553550505
2016-01-01	57.3828433678874
2016-04-01	57.0926065444615
2016-07-01	58.2405029556355
2016-10-01	57.1568241433769
2017-01-01	56.6399119994144
2017-04-01	56.3761872211651
2017-07-01	55.4437207147218
2017-10-01	55.8838777607491
2018-01-01	55.6442789106937
2018-04-01	56.0451712801664