Quarter	Percent, Seasonally Adjusted
1998-01-01	55.0088761806729
1998-04-01	55.3918336256309
1998-07-01	54.8477643870746
1998-10-01	55.1058358243260
1999-01-01	55.6468989704093
1999-04-01	55.8567523891393
1999-07-01	56.5470907443478
1999-10-01	56.6833419627894
2000-01-01	55.2669524957694
2000-04-01	54.4825452130609
2000-07-01	54.6325111322264
2000-10-01	53.5411983236087
2001-01-01	54.0518066928974
2001-04-01	54.6835285531017
2001-07-01	54.8252139599103
2001-10-01	56.3320810799097
2002-01-01	57.7685658461063
2002-04-01	58.2961450721544
2002-07-01	60.2191274890920
2002-10-01	60.7176253275224
2003-01-01	60.2511691030183
2003-04-01	59.4914936048693
2003-07-01	60.3167731216812
2003-10-01	59.5989760322695
2004-01-01	59.7234607005072
2004-04-01	59.7042677867286
2004-07-01	60.5074794799335
2004-10-01	60.6965164348059
2005-01-01	61.6251509858524
2005-04-01	61.9134673918312
2005-07-01	63.1013945437016
2005-10-01	61.9084907844803
2006-01-01	63.3913322141491
2006-04-01	62.6736802230125
2006-07-01	62.8466131551592
2006-10-01	62.0293957304603
2007-01-01	61.7433067273762
2007-04-01	61.7500366082637
2007-07-01	63.3063731273396
2007-10-01	62.9938163744966
2008-01-01	63.4633954417715
2008-04-01	64.2911020106381
2008-07-01	64.2723000209493
2008-10-01	64.5899994955045
2009-01-01	64.0319192014951
2009-04-01	63.6872680421335
2009-07-01	62.9228418747435
2009-10-01	61.9780180639583
2010-01-01	62.0974839318793
2010-04-01	62.2946441924690
2010-07-01	62.8275265616273
2010-10-01	62.6074031445004
2011-01-01	62.4295653755315
2011-04-01	63.8074728147923
2011-07-01	62.7210237721589
2011-10-01	61.4212410487439
2012-01-01	61.8481680175863
2012-04-01	63.6464268320011
2012-07-01	65.3287062738744
2012-10-01	65.2248429608275
2013-01-01	65.2252695137517
2013-04-01	66.0367956604178
2013-07-01	66.5436232039485
2013-10-01	66.5404090397530
2014-01-01	66.6785599645073
2014-04-01	67.2392183015132
2014-07-01	68.7253207925546
2014-10-01	69.0488450427443
2015-01-01	67.6257386866277
2015-04-01	68.4007448586318
2015-07-01	68.4002568536128
2015-10-01	68.6291034505100
2016-01-01	69.4925827987680
2016-04-01	70.6339576364934
2016-07-01	71.3894411788963
2016-10-01	72.2175211068304
2017-01-01	71.8337839495566
2017-04-01	73.2172313832518
2017-07-01	73.3775267486949
2017-10-01	74.1708800669901
2018-01-01	74.7808047881026
2018-04-01	75.4350409040136