Quarter	Percent, Seasonally Adjusted
1998-01-01	59.5121323149181
1998-04-01	58.8882923876670
1998-07-01	58.3192147581732
1998-10-01	58.2296158771463
1999-01-01	57.7884843837058
1999-04-01	57.3529062919454
1999-07-01	57.0591687874488
1999-10-01	57.2856392932306
2000-01-01	56.9994867964864
2000-04-01	56.7717080019108
2000-07-01	56.9236601758972
2000-10-01	56.8801473067079
2001-01-01	57.3785142549666
2001-04-01	56.8807265673569
2001-07-01	56.7796062374784
2001-10-01	56.6712960408314
2002-01-01	56.7881491141429
2002-04-01	57.1027402123627
2002-07-01	57.1338785005299
2002-10-01	57.0917800979370
2003-01-01	56.8474720974637
2003-04-01	56.5238621664802
2003-07-01	56.0819384570824
2003-10-01	55.8475426306010
2004-01-01	55.9653311353764
2004-04-01	56.0651739933761
2004-07-01	56.0090186773572
2004-10-01	55.9307570269986
2005-01-01	56.0001248667492
2005-04-01	56.0121753049985
2005-07-01	56.4906977154337
2005-10-01	56.5548273785411
2006-01-01	56.7466185009006
2006-04-01	56.8208485420750
2006-07-01	56.8023966073483
2006-10-01	56.7973705210993
2007-01-01	57.1498134648357
2007-04-01	57.4589695548169
2007-07-01	57.3069126345725
2007-10-01	57.2472460531752
2008-01-01	57.3899013765325
2008-04-01	57.8599530952366
2008-07-01	57.5619615329994
2008-10-01	57.4930584756079
2009-01-01	57.0050624949790
2009-04-01	56.7379488185291
2009-07-01	56.5077008204958
2009-10-01	56.4639824292278
2010-01-01	55.9769266486849
2010-04-01	56.1170175047613
2010-07-01	56.3653527044301
2010-10-01	56.6056372786952
2011-01-01	56.9187737292109
2011-04-01	57.0968098195828
2011-07-01	57.4933978735889
2011-10-01	57.4824819928945
2012-01-01	57.6007114185760
2012-04-01	58.0925641673052
2012-07-01	58.5812172455716
2012-10-01	58.6844791826753
2013-01-01	59.0295417341448
2013-04-01	59.6248846428277
2013-07-01	59.7551716671225
2013-10-01	59.9761402739946
2014-01-01	60.1485793531836
2014-04-01	60.1991869231829
2014-07-01	60.8102267465269
2014-10-01	61.5880703069246
2015-01-01	61.8905038448018
2015-04-01	62.3178827835760
2015-07-01	62.5876279442795
2015-10-01	62.6439610653490
2016-01-01	63.5396420227684
2016-04-01	64.2124212872517
2016-07-01	64.4980561515662
2016-10-01	65.4053680691341
2017-01-01	65.5539925758030
2017-04-01	65.7344137769087
2017-07-01	66.6422124212939
2017-10-01	66.7193551710911
2018-01-01	67.0869733824366
2018-04-01	67.4989642700188