Quarter	Percent, Seasonally Adjusted
1999-01-01	56.5326019260998
1999-04-01	56.5089939913428
1999-07-01	56.4779679398826
1999-10-01	56.9735892689438
2000-01-01	57.3262718971697
2000-04-01	56.0576853116867
2000-07-01	56.1312632906511
2000-10-01	56.8451579139873
2001-01-01	57.5528265525937
2001-04-01	57.8677867138769
2001-07-01	57.8750674409233
2001-10-01	57.3153739607586
2002-01-01	57.1696054441961
2002-04-01	57.1402934918822
2002-07-01	56.3618940097483
2002-10-01	56.5368958141968
2003-01-01	56.5040210103356
2003-04-01	56.7622541038724
2003-07-01	56.5926936204669
2003-10-01	55.5543972380246
2004-01-01	55.6530114562689
2004-04-01	55.4519445759408
2004-07-01	55.9327403876707
2004-10-01	54.9938394983296
2005-01-01	54.3389375245741
2005-04-01	54.0561019792002
2005-07-01	54.5484875146267
2005-10-01	54.2873573456474
2006-01-01	54.6008978153503
2006-04-01	54.3195082737936
2006-07-01	53.9728005857157
2006-10-01	53.8246554949028
2007-01-01	53.7450520747383
2007-04-01	53.3448482313055
2007-07-01	54.0264568385155
2007-10-01	52.7713349527646
2008-01-01	52.8521846299836
2008-04-01	53.6074689924684
2008-07-01	52.5503107257160
2008-10-01	53.3480573476406
2009-01-01	52.9351917179020
2009-04-01	53.1370388781992
2009-07-01	53.1213008709787
2009-10-01	53.0064659341657
2010-01-01	51.8008609396339
2010-04-01	53.0672279376408
2010-07-01	52.4563149107176
2010-10-01	51.8313999510766
2011-01-01	53.5861436100086
2011-04-01	52.5163872755828
2011-07-01	52.7321266071613
2011-10-01	53.0379716543877
2012-01-01	53.4180148877902
2012-04-01	53.1566944178225
2012-07-01	52.6507826790853
2012-10-01	52.3791413551524
2013-01-01	52.6970138499595
2013-04-01	52.3976621064079
2013-07-01	51.4168541136143
2013-10-01	52.4150355953684
2014-01-01	52.4297838701582
2014-04-01	51.8318472054754
2014-07-01	51.6302993249207
2014-10-01	51.7979477381720
2015-01-01	51.6601874164655
2015-04-01	52.3865683976074
2015-07-01	52.2449462032630
2015-10-01	51.6742619435842
2016-01-01	52.3841466319339
2016-04-01	52.4365371372548
2016-07-01	52.6352942753779
2016-10-01	51.4420231219633
2017-01-01	51.6061319466980
2017-04-01	51.2581944145074
2017-07-01	51.2891415965238
2017-10-01	50.9666923957201
2018-01-01	50.8416524489619
2018-04-01	51.0074059386250