Quarter	Percent, Seasonally Adjusted
1999-01-01	56.4258663741075
1999-04-01	56.4204288578170
1999-07-01	56.4143321772122
1999-10-01	55.7448594662075
2000-01-01	55.4807136281358
2000-04-01	57.0259581843314
2000-07-01	56.9110018695124
2000-10-01	56.1147958104951
2001-01-01	55.3367262552949
2001-04-01	54.8887682393167
2001-07-01	54.7113763565954
2001-10-01	55.4889799323338
2002-01-01	55.8773485514907
2002-04-01	55.8692159375055
2002-07-01	56.7204864618566
2002-10-01	56.6001924074365
2003-01-01	56.7661619679808
2003-04-01	56.2788578669143
2003-07-01	56.4825035442882
2003-10-01	57.9067556045067
2004-01-01	57.7343017564717
2004-04-01	58.1759376165406
2004-07-01	58.3141182714313
2004-10-01	58.6704582870677
2005-01-01	59.5141362399246
2005-04-01	59.9217232669959
2005-07-01	59.0682185367583
2005-10-01	59.4025992178590
2006-01-01	59.0053217220164
2006-04-01	59.3812573182659
2006-07-01	59.7777197117369
2006-10-01	59.9681449456036
2007-01-01	60.0909567078892
2007-04-01	60.5695976599099
2007-07-01	59.8393526162965
2007-10-01	61.2621808121370
2008-01-01	61.1313341617241
2008-04-01	60.1470792096496
2008-07-01	61.4517856291570
2008-10-01	60.4712131634366
2009-01-01	61.1465391201278
2009-04-01	60.9168927878454
2009-07-01	60.7646324544522
2009-10-01	60.9434431721150
2010-01-01	62.5086772106392
2010-04-01	60.8801249221885
2010-07-01	61.5203620224462
2010-10-01	62.3637039742940
2011-01-01	60.3284892080162
2011-04-01	61.6721605283836
2011-07-01	61.3515371745725
2011-10-01	60.9980634226850
2012-01-01	60.6241859216003
2012-04-01	60.9994089976703
2012-07-01	61.7452451404831
2012-10-01	61.9895125088157
2013-01-01	61.7493308688691
2013-04-01	62.1359655413779
2013-07-01	63.2712175784980
2013-10-01	62.0144206976906
2014-01-01	62.3467959650634
2014-04-01	63.0552581756619
2014-07-01	63.3096100230741
2014-10-01	63.1083718096460
2015-01-01	63.3712486331591
2015-04-01	62.4975737774772
2015-07-01	62.6770308669901
2015-10-01	63.2707169164643
2016-01-01	62.6693631462778
2016-04-01	62.6898468790968
2016-07-01	62.3824696874803
2016-10-01	63.6822440529432
2017-01-01	62.7637231622509
2017-04-01	63.2945373836886
2017-07-01	63.1748638492740
2017-10-01	63.5286890015262
2018-01-01	63.7165633188541
2018-04-01	63.6603395204030