Quarter	Percent, Seasonally Adjusted
1999-01-01	58.7602459016394
1999-04-01	57.7217776264260
1999-07-01	58.8534599728630
1999-10-01	58.8536335721597
2000-01-01	57.5470099949178
2000-04-01	56.9399830938292
2000-07-01	58.5144012127337
2000-10-01	59.5209984820374
2001-01-01	59.0679676985195
2001-04-01	58.2144655143480
2001-07-01	58.6270560590802
2001-10-01	57.8020134228188
2002-01-01	55.7695528387205
2002-04-01	56.2019391507857
2002-07-01	55.8651760387118
2002-10-01	56.6550058304181
2003-01-01	54.9817336433079
2003-04-01	56.0495867768595
2003-07-01	56.4702008561080
2003-10-01	56.1987536897343
2004-01-01	56.8230102958000
2004-04-01	55.4342512628320
2004-07-01	54.7433398310591
2004-10-01	54.2597991577583
2005-01-01	54.3488784895917
2005-04-01	53.3815261044177
2005-07-01	53.9740924356309
2005-10-01	54.2993630573248
2006-01-01	55.0554675118859
2006-04-01	54.4509216952891
2006-07-01	54.7249647390691
2006-10-01	55.0740452065472
2007-01-01	54.0310077519380
2007-04-01	53.3364154723378
2007-07-01	51.9687452121955
2007-10-01	52.6893189090355
2008-01-01	53.5437850963727
2008-04-01	52.4637243047158
2008-07-01	53.1315868714243
2008-10-01	54.2372881355932
2009-01-01	53.6114849708389
2009-04-01	54.1946058709581
2009-07-01	54.0986040986041
2009-10-01	54.1888691533452
2010-01-01	52.8934160023620
2010-04-01	52.7229908743009
2010-07-01	52.5975931904902
2010-10-01	52.0848573518654
2011-01-01	53.2107413893754
2011-04-01	53.0208181685835
2011-07-01	53.3323653259765
2011-10-01	54.6494785631518
2012-01-01	53.4594828831431
2012-04-01	52.8937517995969
2012-07-01	52.1664275466284
2012-10-01	53.5964535964536
2013-01-01	53.9823008849558
2013-04-01	52.6225769669327
2013-07-01	53.2593225163678
2013-10-01	52.7138391588519
2014-01-01	53.2557809618386
2014-04-01	52.9861307670535
2014-07-01	51.8068887634105
2014-10-01	52.0000000000000
2015-01-01	50.4432249894470
2015-04-01	49.8807352322155
2015-07-01	49.6502518186905
2015-10-01	50.4324776785714
2016-01-01	50.3339827442249
2016-04-01	49.0772859719717
2016-07-01	49.0038738240177
2016-10-01	47.7583114912402
2017-01-01	47.2989690721650
2017-04-01	45.3187114461960
2017-07-01	44.4019138755981
2017-10-01	44.4929116684842
2018-01-01	42.3249490142760
2018-04-01	41.6474732421081