Quarter	Percent, Seasonally Adjusted
1999-01-01	65.5941600844679
1999-04-01	66.3072420749046
1999-07-01	66.0903633475541
1999-10-01	65.4084433084843
2000-01-01	66.5755200451006
2000-04-01	67.7414005350493
2000-07-01	67.7682231102018
2000-10-01	66.7150192781689
2001-01-01	66.9521118751592
2001-04-01	66.4105552533604
2001-07-01	66.0460141808874
2001-10-01	66.6904150435532
2002-01-01	66.3141876062456
2002-04-01	66.7715782039770
2002-07-01	67.1084914709447
2002-10-01	67.0105064114709
2003-01-01	67.1585272840921
2003-04-01	67.6422813447961
2003-07-01	67.7210247898730
2003-10-01	68.8275740544869
2004-01-01	67.3951721586446
2004-04-01	68.8174557488175
2004-07-01	68.1337458928727
2004-10-01	69.6670271617162
2005-01-01	70.4204237310400
2005-04-01	70.4698129575344
2005-07-01	70.4710297393876
2005-10-01	70.1230629320963
2006-01-01	69.7362323931340
2006-04-01	70.7488708270011
2006-07-01	71.1857051290753
2006-10-01	71.2437799401965
2007-01-01	71.6949734830380
2007-04-01	71.6032165434425
2007-07-01	72.4328453790258
2007-10-01	73.4650555994690
2008-01-01	73.9344217886339
2008-04-01	73.7978458742334
2008-07-01	74.0544103025523
2008-10-01	73.2975418462546
2009-01-01	74.6058383486553
2009-04-01	73.7638629371986
2009-07-01	72.9536555321963
2009-10-01	73.8083311608097
2010-01-01	74.7314726617084
2010-04-01	73.6017209759835
2010-07-01	73.5929277259372
2010-10-01	75.6661035671456
2011-01-01	72.9647471289642
2011-04-01	74.2603985341574
2011-07-01	74.1525024587525
2011-10-01	73.6427907458135
2012-01-01	73.5236648988641
2012-04-01	73.3382637634994
2012-07-01	74.1855902110263
2012-10-01	74.6449390956404
2013-01-01	73.7037864801690
2013-04-01	74.0393696402262
2013-07-01	74.8100505263583
2013-10-01	73.4923145730315
2014-01-01	74.9416712993726
2014-04-01	75.3715311175096
2014-07-01	74.8461890467134
2014-10-01	74.6370100008076
2015-01-01	74.9274762318090
2015-04-01	73.7410121064789
2015-07-01	74.7112992518172
2015-10-01	74.4855731362083
2016-01-01	73.8603394593775
2016-04-01	73.4590923673932
2016-07-01	74.1015983551295
2016-10-01	75.9736125326917
2017-01-01	74.2189235022193
2017-04-01	75.1668097845665
2017-07-01	73.8136259774805
2017-10-01	75.3388976141210
2018-01-01	75.7187510270544
2018-04-01	75.5246566673484