Quarter	Percent, Seasonally Adjusted
1999-01-01	50.2636285164408
1999-04-01	50.2883960730864
1999-07-01	50.7193857580428
1999-10-01	50.2188522137879
2000-01-01	50.6949793319926
2000-04-01	51.9818513654195
2000-07-01	51.9369496227533
2000-10-01	51.2610651807202
2001-01-01	51.3034245011127
2001-04-01	50.8404007283535
2001-07-01	50.8977588868356
2001-10-01	50.7629138082839
2002-01-01	50.8865222377860
2002-04-01	51.2189935356038
2002-07-01	51.7122356407209
2002-10-01	51.7619569512704
2003-01-01	51.6785725573702
2003-04-01	51.4706891337913
2003-07-01	51.4458402103695
2003-10-01	52.6211390576289
2004-01-01	52.1237509544606
2004-04-01	53.0375924403968
2004-07-01	52.2873051942689
2004-10-01	53.1363760902771
2005-01-01	53.8130291596110
2005-04-01	54.1918122583366
2005-07-01	53.3349056359830
2005-10-01	53.8468714644162
2006-01-01	53.4797875265035
2006-04-01	53.6973913223672
2006-07-01	54.1610892407468
2006-10-01	54.5230162541839
2007-01-01	54.6316917394596
2007-04-01	54.9522909124037
2007-07-01	55.2531793902004
2007-10-01	56.4157027874149
2008-01-01	56.5088101535922
2008-04-01	55.8480967844294
2008-07-01	56.5185079786524
2008-10-01	55.7703356326315
2009-01-01	56.0562543416668
2009-04-01	56.1095995214686
2009-07-01	55.6909091026806
2009-10-01	56.0884579446017
2010-01-01	56.9276747383831
2010-04-01	55.5953925636121
2010-07-01	56.2572814990478
2010-10-01	57.3316863758610
2011-01-01	56.1628412647477
2011-04-01	57.2763836952304
2011-07-01	56.6616261460272
2011-10-01	56.6346362292550
2012-01-01	56.2380419780219
2012-04-01	56.3482188861343
2012-07-01	57.1644315449296
2012-10-01	57.3360447781346
2013-01-01	56.7615643860352
2013-04-01	56.8642589903046
2013-07-01	58.1570537737472
2013-10-01	56.9317088061812
2014-01-01	57.2931724849728
2014-04-01	58.1730336313960
2014-07-01	58.2857806921024
2014-10-01	57.9725245690336
2015-01-01	58.2444209406566
2015-04-01	57.7031516512618
2015-07-01	58.0174715289642
2015-10-01	58.1604723942031
2016-01-01	57.8019469859267
2016-04-01	57.3739277202585
2016-07-01	57.6950210877212
2016-10-01	59.4665083630843
2017-01-01	57.7342092407676
2017-04-01	58.5530889403317
2017-07-01	58.9914729365348
2017-10-01	59.5352879833263
2018-01-01	60.0342134736645
2018-04-01	59.6818952423801