Quarter	Percent, Seasonally Adjusted
2005-01-01	19.6108143502967
2005-04-01	19.5204341539932
2005-07-01	19.4256284667169
2005-10-01	19.3697808227808
2006-01-01	19.2683189956423
2006-04-01	19.2006535347039
2006-07-01	19.1414811431379
2006-10-01	19.0716031380481
2007-01-01	19.0576883614940
2007-04-01	19.0343825690458
2007-07-01	19.0351052276400
2007-10-01	18.8948055558095
2008-01-01	18.8448474308241
2008-04-01	18.7874988865321
2008-07-01	18.7774915394269
2008-10-01	18.7464168222844
2009-01-01	18.7751836703218
2009-04-01	18.8689516731475
2009-07-01	18.7243652036798
2009-10-01	18.7653280186282
2010-01-01	18.7420156106230
2010-04-01	18.6738939874766
2010-07-01	18.7343052796627
2010-10-01	18.8278567797415
2011-01-01	18.7712534554498
2011-04-01	18.6952698891524
2011-07-01	18.7237419959581
2011-10-01	18.6788875213428
2012-01-01	18.6594824548950
2012-04-01	18.5327217453647
2012-07-01	18.4916475464373
2012-10-01	18.5040254024610
2013-01-01	18.5622166930377
2013-04-01	18.4425875042231
2013-07-01	18.5032704544523
2013-10-01	18.4906957881434
2014-01-01	18.4736849695234
2014-04-01	18.5400960128446
2014-07-01	18.4855537457290
2014-10-01	18.4388994335195
2015-01-01	18.4096949201529
2015-04-01	18.3983643226235
2015-07-01	18.4118178673541
2015-10-01	18.2543168261402
2016-01-01	18.1693917735663
2016-04-01	18.1557706329894
2016-07-01	18.0213890159837
2016-10-01	18.0076558551560
2017-01-01	17.9403365831735
2017-04-01	17.9170741513430
2017-07-01	17.8280804547266
2017-10-01	17.7628784202079
2018-01-01	17.6371331182655
2018-04-01	17.5626792464979