Quarter	Percent, Seasonally Adjusted
1999-01-01	57.1198300562758
1999-04-01	57.0710291692335
1999-07-01	56.9443132438501
1999-10-01	56.6005175851981
2000-01-01	56.7860190289265
2000-04-01	57.5588406402980
2000-07-01	57.4576728478308
2000-10-01	56.6679883251648
2001-01-01	56.3844751893730
2001-04-01	56.2219931005213
2001-07-01	56.4282595838860
2001-10-01	56.3605388618748
2002-01-01	56.6532496165741
2002-04-01	56.6265840539676
2002-07-01	57.0674034651190
2002-10-01	57.2187541954228
2003-01-01	56.6562267544777
2003-04-01	56.8733661920120
2003-07-01	56.9176890295378
2003-10-01	57.8888286171544
2004-01-01	57.8228519558806
2004-04-01	57.8391302217118
2004-07-01	58.1955584573094
2004-10-01	58.0815162701202
2005-01-01	58.9253624584839
2005-04-01	58.8656411215333
2005-07-01	58.8943919158500
2005-10-01	58.8051944584173
2006-01-01	58.5088589411246
2006-04-01	58.7460435865499
2006-07-01	58.6625703875242
2006-10-01	59.6053889573047
2007-01-01	59.6870042100090
2007-04-01	59.6282789621868
2007-07-01	59.2345858054671
2007-10-01	59.8297064413243
2008-01-01	60.0523774429172
2008-04-01	59.2855977957181
2008-07-01	60.2500962906659
2008-10-01	59.3949951095434
2009-01-01	59.8588993915942
2009-04-01	59.4542020699127
2009-07-01	59.4498201232056
2009-10-01	59.7192680625799
2010-01-01	60.4774155033168
2010-04-01	59.9858960834538
2010-07-01	60.2188067540568
2010-10-01	60.4919553877847
2011-01-01	58.9360317910071
2011-04-01	59.8584723194766
2011-07-01	59.3375750712049
2011-10-01	59.3888276063402
2012-01-01	59.1427331109590
2012-04-01	59.3630784616168
2012-07-01	59.5716598841135
2012-10-01	59.7592336258985
2013-01-01	59.5443461034647
2013-04-01	60.1111474683399
2013-07-01	60.1785340430489
2013-10-01	59.5325121054110
2014-01-01	59.7577157530584
2014-04-01	60.0081955538816
2014-07-01	59.9161000748402
2014-10-01	59.9395042012724
2015-01-01	60.1577696806070
2015-04-01	59.4693074360424
2015-07-01	59.4756953681385
2015-10-01	59.5296304063028
2016-01-01	59.2405766573186
2016-04-01	59.4186827606990
2016-07-01	59.1530770445699
2016-10-01	59.8724114233516
2017-01-01	59.3567510541190
2017-04-01	59.5672106481808
2017-07-01	59.7040867722853
2017-10-01	59.8065516389473
2018-01-01	59.7538850993541
2018-04-01	59.6345514571494