Quarter	Percent, Seasonally Adjusted
1999-04-01	45.6612089575958
1999-07-01	45.6275869330276
1999-10-01	46.0890311090348
2000-01-01	46.2755170344177
2000-04-01	46.2719512506802
2000-07-01	46.5310680147889
2000-10-01	47.0296665784773
2001-01-01	47.5585144012129
2001-04-01	47.8571663119929
2001-07-01	48.1537728956953
2001-10-01	48.5556439700647
2002-01-01	48.6822763702294
2002-04-01	49.0610214519384
2002-07-01	49.4600688846682
2002-10-01	49.8917773980946
2003-01-01	49.8059808411051
2003-04-01	50.3069800114078
2003-07-01	50.3730665489860
2003-10-01	50.5200612666140
2004-01-01	51.0538487657718
2004-04-01	50.5259015765656
2004-07-01	50.1821608636365
2004-10-01	51.4628756670454
2005-01-01	52.2742516593342
2005-04-01	52.9752989460753
2005-07-01	53.2913039773940
2005-10-01	53.7477806430633
2006-01-01	54.2978659993539
2006-04-01	54.4399586340550
2006-07-01	54.4565489913549
2006-10-01	54.5184901603094
2007-01-01	54.9186040590692
2007-04-01	55.2083614771246
2007-07-01	55.3936424430230
2007-10-01	55.4547539507418
2008-01-01	55.3738003311597
2008-04-01	55.5845108046100
2008-07-01	55.9806033501680
2008-10-01	55.8873155864282
2009-01-01	55.4599545609471
2009-04-01	54.9324531567905
2009-07-01	54.8444732120488
2009-10-01	54.1381168742408
2010-01-01	54.6372332333567
2010-04-01	55.1615768041339
2010-07-01	55.5541302285446
2010-10-01	54.9536016593073
2011-01-01	55.0669635359106
2011-04-01	55.6904045356867
2011-07-01	55.4890587499821
2011-10-01	55.6407654704027
2012-01-01	54.8019604962799
2012-04-01	55.1324346611281
2012-07-01	55.0617094860469
2012-10-01	55.6661438822270
2013-01-01	56.8350516488812
2013-04-01	57.0716731882825
2013-07-01	57.4961626966494
2013-10-01	58.7423022161352
2014-01-01	58.2322745288142
2014-04-01	58.1774546094923
2014-07-01	58.9289148312746
2014-10-01	58.8777301997546
2015-01-01	59.3585030862032
2015-04-01	60.3002254822643
2015-07-01	60.4787144751316
2015-10-01	61.0303379188726
2016-01-01	61.1053329600621
2016-04-01	61.1382004496034
2016-07-01	60.8143654775526
2016-10-01	61.3605441488997
2017-01-01	61.7006149305173
2017-04-01	62.1850703247697
2017-07-01	62.4286570073115
2017-10-01	62.5041645921303
2018-01-01	62.4722261403437
2018-04-01	63.3079187886012