Quarter	Percent, Seasonally Adjusted
1999-01-01	52.2212789832864
1999-04-01	52.2640926876436
1999-07-01	52.4476241091421
1999-10-01	52.3074257128859
2000-01-01	52.4729759765613
2000-04-01	52.3426301226514
2000-07-01	52.6305222226723
2000-10-01	52.9262228921216
2001-01-01	52.8957828711712
2001-04-01	53.4603260104448
2001-07-01	53.2594015978281
2001-10-01	53.8535208168049
2002-01-01	54.2060568042762
2002-04-01	54.3499032411493
2002-07-01	54.4960221065750
2002-10-01	54.7050043513533
2003-01-01	54.6850353590014
2003-04-01	54.9887882935244
2003-07-01	55.0410539193470
2003-10-01	54.7544441111810
2004-01-01	53.0329385619900
2004-04-01	52.9750268410616
2004-07-01	53.1123858703245
2004-10-01	53.4024854791817
2005-01-01	53.9101216707290
2005-04-01	53.9224886197719
2005-07-01	54.2506020090449
2005-10-01	54.3926497681422
2006-01-01	54.5567249747299
2006-04-01	54.9156406004338
2006-07-01	55.1616232192646
2006-10-01	55.3053655100632
2007-01-01	55.6596520479736
2007-04-01	55.7092646301197
2007-07-01	56.3164174033480
2007-10-01	56.5361032239708
2008-01-01	56.8795652078793
2008-04-01	57.1385368988574
2008-07-01	57.0721107634460
2008-10-01	57.3764244903535
2009-01-01	57.3599305572430
2009-04-01	57.4263772084769
2009-07-01	57.2880575969526
2009-10-01	57.4491781283666
2010-01-01	57.6231994296666
2010-04-01	57.5431898635762
2010-07-01	57.7654688990802
2010-10-01	57.9780475118218
2011-01-01	57.9660440608911
2011-04-01	58.0725605341633
2011-07-01	58.2931080829139
2011-10-01	57.9991889270215
2012-01-01	58.3090992919052
2012-04-01	58.4177019507807
2012-07-01	58.3841875930893
2012-10-01	58.6325172921859
2013-01-01	58.3452815035206
2013-04-01	58.4935250180659
2013-07-01	58.5928336810413
2013-10-01	58.2566481815429
2014-01-01	58.4556130312588
2014-04-01	58.6540736293550
2014-07-01	58.2393159038678
2014-10-01	58.5832712187006
2015-01-01	58.5495567635288
2015-04-01	58.5832594131458
2015-07-01	59.0675938682800
2015-10-01	59.2103551110222
2016-01-01	59.3312287445837
2016-04-01	59.3287590604910
2016-07-01	59.6031613334585
2016-10-01	59.7136214318599
2017-01-01	59.8660464957600
2017-04-01	60.0339484337786
2017-07-01	59.9417599624363
2017-10-01	60.1267616079108
2018-01-01	60.2043868395779
2018-04-01	60.2050623682403