Quarter	Percent, Seasonally Adjusted
1999-01-01	50.7400594871224
1999-04-01	50.5794991806977
1999-07-01	50.4799931165180
1999-10-01	50.4338781333594
2000-01-01	50.4847422410946
2000-04-01	50.3254249075267
2000-07-01	50.2029482569662
2000-10-01	49.9224660380514
2001-01-01	50.6891421815909
2001-04-01	51.0240177765369
2001-07-01	51.0047360186420
2001-10-01	51.2466402444689
2002-01-01	51.0831754374359
2002-04-01	50.9935579200073
2002-07-01	50.9114963565609
2002-10-01	50.7476387567039
2003-01-01	50.5124808547832
2003-04-01	50.1800669936892
2003-07-01	50.1335361693473
2003-10-01	50.1202759841147
2004-01-01	50.1896079337015
2004-04-01	50.4287315711343
2004-07-01	50.4778956608311
2004-10-01	50.2295663039612
2005-01-01	50.0110855998013
2005-04-01	49.9041164490120
2005-07-01	49.7050306657559
2005-10-01	49.6925492029313
2006-01-01	49.4258809958574
2006-04-01	49.3162979813142
2006-07-01	49.4033604541276
2006-10-01	49.2361253224917
2007-01-01	49.4642981643198
2007-04-01	49.6424543963351
2007-07-01	49.7678047786555
2007-10-01	49.8312055104393
2008-01-01	50.1457958162344
2008-04-01	50.2458270759826
2008-07-01	49.9160960631241
2008-10-01	50.0567167474686
2009-01-01	50.1818523968163
2009-04-01	50.1272491518595
2009-07-01	50.2641599396350
2009-10-01	50.0053126326574
2010-01-01	49.7290604434245
2010-04-01	49.6592504906507
2010-07-01	49.6066887313481
2010-10-01	49.6307097325727
2011-01-01	49.6051953205240
2011-04-01	49.3837750525132
2011-07-01	49.2578060320820
2011-10-01	49.0445298277313
2012-01-01	48.7976044517425
2012-04-01	48.4036033758185
2012-07-01	48.1290627646370
2012-10-01	48.0291745048628
2013-01-01	48.4017515414904
2013-04-01	47.8778845470061
2013-07-01	47.6650647711559
2013-10-01	47.3337861665731
2014-01-01	46.5835458176538
2014-04-01	46.4604433566120
2014-07-01	46.1834471924708
2014-10-01	46.0467276091662
2015-01-01	45.6227849663199
2015-04-01	45.3336237229974
2015-07-01	45.0730311881179
2015-10-01	44.9405981760387
2016-01-01	44.6278364420944
2016-04-01	44.4251422004258
2016-07-01	44.2288127950037
2016-10-01	43.9353077746483
2017-01-01	44.0137884772051
2017-04-01	43.7111501157154
2017-07-01	43.6395674575740
2017-10-01	43.5371342934729
2018-01-01	43.3197628867672
2018-04-01	43.3075483744897