Quarter	Percent, Seasonally Adjusted
1999-01-01	67.1746766648311
1999-04-01	66.9116311097509
1999-07-01	66.9046083206994
1999-10-01	66.7680004247275
2000-01-01	66.6204327180310
2000-04-01	66.8143086228192
2000-07-01	66.5140335112462
2000-10-01	66.3873975664820
2001-01-01	66.1641229676027
2001-04-01	66.0328747231584
2001-07-01	66.0471000826239
2001-10-01	65.8881608357344
2002-01-01	65.4162250955753
2002-04-01	65.4651056014280
2002-07-01	65.5092935390745
2002-10-01	65.5347705467093
2003-01-01	65.8616902204996
2003-04-01	65.6746000087301
2003-07-01	65.3766038226610
2003-10-01	65.2812817622901
2004-01-01	63.0118112462464
2004-04-01	62.8410136457330
2004-07-01	62.6101329507762
2004-10-01	62.3955274613065
2005-01-01	62.7396922135579
2005-04-01	62.6130054388027
2005-07-01	62.8117632950034
2005-10-01	62.9991963362869
2006-01-01	63.0486908137676
2006-04-01	63.3131811648587
2006-07-01	63.6174218152347
2006-10-01	63.7895167747613
2007-01-01	64.2157456723410
2007-04-01	64.3854811065067
2007-07-01	64.7517361572976
2007-10-01	64.7922738590254
2008-01-01	65.0021464291538
2008-04-01	65.1774611040994
2008-07-01	64.6906890071062
2008-10-01	64.5252309750956
2009-01-01	64.0298182027097
2009-04-01	63.5593347564253
2009-07-01	63.4151188635934
2009-10-01	63.5063959424506
2010-01-01	63.5571158832616
2010-04-01	63.7292729919799
2010-07-01	63.7575385865504
2010-10-01	63.9671884777945
2011-01-01	63.8067624274838
2011-04-01	63.8225084716434
2011-07-01	64.0155120148528
2011-10-01	63.8039914726489
2012-01-01	63.8518037731003
2012-04-01	63.7072247610604
2012-07-01	63.4643632416591
2012-10-01	63.4740349314056
2013-01-01	63.3938519191334
2013-04-01	63.5099819659702
2013-07-01	63.2649858975418
2013-10-01	63.1634532938059
2014-01-01	62.7134818435252
2014-04-01	62.6085017959615
2014-07-01	62.5725737993036
2014-10-01	62.3330307368977
2015-01-01	62.5567341998230
2015-04-01	62.2239625173523
2015-07-01	62.3283601409488
2015-10-01	62.3412131271655
2016-01-01	62.3576741989830
2016-04-01	62.3938414429472
2016-07-01	62.5902146021934
2016-10-01	62.6042406619250
2017-01-01	62.5491920522789
2017-04-01	62.8086905069810
2017-07-01	62.8612699730324
2017-10-01	63.2203460594449
2018-01-01	63.5058301523732
2018-04-01	63.7807004905282