Quarter	Percent, Seasonally Adjusted
1999-07-01	51.3963418582130
1999-10-01	51.7142116351595
2000-01-01	51.7366606188583
2000-04-01	51.8079196333316
2000-07-01	52.3535762104868
2000-10-01	52.3553537707258
2001-01-01	52.3252096710331
2001-04-01	52.8820524340180
2001-07-01	52.9153315692900
2001-10-01	53.2860109924882
2002-01-01	53.5805866946610
2002-04-01	53.7060175793835
2002-07-01	53.5815687862009
2002-10-01	53.3348717855645
2003-01-01	52.7679942011758
2003-04-01	52.8315659688754
2003-07-01	53.0686826472716
2003-10-01	53.3286344460520
2004-01-01	54.2544164656057
2004-04-01	54.2065730229360
2004-07-01	54.2511394466024
2004-10-01	54.3335885683389
2005-01-01	54.2974506808592
2005-04-01	54.3733592537310
2005-07-01	54.6275327937670
2005-10-01	54.8686559780116
2006-01-01	54.9706271786258
2006-04-01	54.8899199716063
2006-07-01	54.8495767038012
2006-10-01	54.9753103337574
2007-01-01	54.9406945418475
2007-04-01	54.8578737830123
2007-07-01	54.8370145062323
2007-10-01	55.0390916950454
2008-01-01	54.9753400450949
2008-04-01	55.0052256355601
2008-07-01	54.6896166684780
2008-10-01	54.6494160172937
2009-01-01	54.0930726941929
2009-04-01	53.9213616116926
2009-07-01	54.0213843147194
2009-10-01	53.9913066207397
2010-01-01	54.5279833002142
2010-04-01	54.4403078188300
2010-07-01	54.6430540130509
2010-10-01	54.5684991510897
2011-01-01	54.7663254640564
2011-04-01	55.0375600490496
2011-07-01	54.7552166005858
2011-10-01	55.0150285369446
2012-01-01	55.2107334331507
2012-04-01	55.3950577878632
2012-07-01	55.1873474093341
2012-10-01	55.1518745852491
2013-01-01	55.0245664669310
2013-04-01	55.4902780050134
2013-07-01	55.8400735513145
2013-10-01	56.1665608002987
2014-01-01	56.7505089101801
2014-04-01	57.0151780274468
2014-07-01	57.1843844156080
2014-10-01	57.3171581073730
2015-01-01	57.5917706188421
2015-04-01	57.7021525674987
2015-07-01	57.9370090285372
2015-10-01	58.1731197217521
2016-01-01	58.1531844568541
2016-04-01	58.0789146735757
2016-07-01	58.3985001782892
2016-10-01	58.5693656010343
2017-01-01	58.8526000763466
2017-04-01	58.9436854677744
2017-07-01	59.0463341060540
2017-10-01	59.1557528391114
2018-01-01	59.2452809265709
2018-04-01	59.4052500031994
2018-07-01	59.5297916262895