Quarter	Percent, Seasonally Adjusted
1999-01-01	78.9800572816935
1999-04-01	78.8852105166583
1999-07-01	78.6954828676121
1999-10-01	78.7253658417953
2000-01-01	78.3574651581908
2000-04-01	77.5814811078430
2000-07-01	76.8800849779591
2000-10-01	76.3727270379239
2001-01-01	76.7341881663907
2001-04-01	76.6776533597375
2001-07-01	76.0599187167718
2001-10-01	75.8120826999129
2002-01-01	75.6707305060045
2002-04-01	75.0629127331175
2002-07-01	75.1730201631013
2002-10-01	74.7908395639185
2003-01-01	74.7280120535221
2003-04-01	74.0072214130964
2003-07-01	73.3847324630118
2003-10-01	73.2327371388696
2004-01-01	72.9365042192797
2004-04-01	72.5019253271794
2004-07-01	72.2807987953546
2004-10-01	72.1435476254848
2005-01-01	70.7701324448481
2005-04-01	70.1289750521114
2005-07-01	70.1732962417937
2005-10-01	69.3258696595654
2006-01-01	68.8542502828030
2006-04-01	69.0536272977089
2006-07-01	69.2578611942525
2006-10-01	68.1627989013250
2007-01-01	67.6410627690501
2007-04-01	67.2438724286308
2007-07-01	67.5298591373813
2007-10-01	66.7150577978141
2008-01-01	66.4760319407053
2008-04-01	66.1147503816540
2008-07-01	65.9569463950740
2008-10-01	64.5055932760865
2009-01-01	63.8412385185608
2009-04-01	62.6026661877415
2009-07-01	62.8278783588606
2009-10-01	62.4842152177711
2010-01-01	62.0266610735438
2010-04-01	62.3790145131399
2010-07-01	61.3968228995160
2010-10-01	60.4538146733351
2011-01-01	59.6907329857795
2011-04-01	58.4165190126268
2011-07-01	57.5013073541667
2011-10-01	57.2833734597315
2012-01-01	57.0002130373502
2012-04-01	55.9636270223198
2012-07-01	55.6631944161910
2012-10-01	55.9238552815997
2013-01-01	55.2227177968704
2013-04-01	55.0429492136164
2013-07-01	54.8331220346229
2013-10-01	54.0759779402116
2014-01-01	53.7288549893979
2014-04-01	53.0559113271743
2014-07-01	53.2920820341174
2014-10-01	52.3486643307309
2015-01-01	51.9590191264625
2015-04-01	50.9537906341175
2015-07-01	50.5128294001566
2015-10-01	49.0400293933724
2016-01-01	48.6983429220033
2016-04-01	48.6275984167838
2016-07-01	47.8963695750274
2016-10-01	48.1070260511042
2017-01-01	48.4687813755638
2017-04-01	48.0721151447209
2017-07-01	48.3921628843116
2017-10-01	47.8989435608778
2018-01-01	47.3393992084414
2018-04-01	47.2789066610811
2018-07-01	47.4717728817957