Quarter	Percent, Seasonally Adjusted
1999-01-01	66.2545116006043
1999-04-01	62.6199023294724
1999-07-01	64.5317769751459
1999-10-01	68.5523102411027
2000-01-01	67.3146672561077
2000-04-01	64.8388935823435
2000-07-01	66.8637264646733
2000-10-01	68.0371722922413
2001-01-01	65.8080169275674
2001-04-01	65.7557923045627
2001-07-01	69.0715801899866
2001-10-01	72.6555041501976
2002-01-01	68.1823686358386
2002-04-01	67.4399087858877
2002-07-01	67.5183726533067
2002-10-01	65.2661113862734
2003-01-01	69.0379728098956
2003-04-01	70.4211156952041
2003-07-01	73.4462135001668
2003-10-01	68.8161418386200
2004-01-01	69.0477487859778
2004-04-01	72.8390102256969
2004-07-01	72.7210847032518
2004-10-01	70.5130843896771
2005-01-01	69.9608153843715
2005-04-01	69.6983705959244
2005-07-01	68.3932470735099
2005-10-01	66.9557193063193
2006-01-01	68.3551734777520
2006-04-01	70.1338814797316
2006-07-01	69.2522657694312
2006-10-01	70.4792104985127
2007-01-01	68.5130906144677
2007-04-01	66.6645143271153
2007-07-01	66.9301357278667
2007-10-01	65.6454113568983
2008-01-01	66.4193263642624
2008-04-01	66.1503095629162
2008-07-01	67.2826369065753
2008-10-01	67.5887419174788
2009-01-01	66.4048094357401
2009-04-01	68.0112429585154
2009-07-01	69.2954422528976
2009-10-01	68.6423432086538
2010-01-01	67.9198592750916
2010-04-01	67.1251935169516
2010-07-01	68.3971607880333
2010-10-01	67.8252947277941
2011-01-01	67.7087873676584
2011-04-01	68.1238428722922
2011-07-01	68.4717295839421
2011-10-01	69.0891021398732
2012-01-01	69.1030095819763
2012-04-01	69.6514326806847
2012-07-01	69.2186197573238
2012-10-01	71.4972408439210
2013-01-01	70.1646341107462
2013-04-01	69.6623862685839
2013-07-01	70.3888298621997
2013-10-01	70.5021870424152
2014-01-01	71.0589600830122
2014-04-01	72.0274558968866
2014-07-01	73.5021384781306
2014-10-01	73.7487782275060
2015-01-01	73.2730747257181
2015-04-01	72.7429041011851
2015-07-01	72.2391542314454
2015-10-01	72.7295586927910
2016-01-01	73.7042025974575
2016-04-01	74.5474388092424
2016-07-01	76.3964670969312
2016-10-01	75.0113041974018
2017-01-01	73.6185506055162
2017-04-01	76.3037647041348
2017-07-01	76.7384260948338
2017-10-01	75.9838221492523
2018-01-01	76.3247954761110
2018-04-01	78.4392010695661