Quarter	Percent, Seasonally Adjusted
1999-01-01	19.7784438362428
1999-04-01	20.0960359313142
1999-07-01	19.9257119519691
1999-10-01	19.3604564138582
2000-01-01	19.4548804899712
2000-04-01	18.9036984280409
2000-07-01	18.9735870243898
2000-10-01	18.8654662769536
2001-01-01	18.9682195696229
2001-04-01	19.7234821394964
2001-07-01	20.1260606289350
2001-10-01	19.8788520124897
2002-01-01	19.9198389424624
2002-04-01	20.0719057092486
2002-07-01	20.6639224845640
2002-10-01	21.1254337093112
2003-01-01	21.7978687236961
2003-04-01	21.4302073144548
2003-07-01	21.0291275863694
2003-10-01	21.2239265920015
2004-01-01	20.3948039280885
2004-04-01	20.6660229589100
2004-07-01	21.1030916273627
2004-10-01	19.9816332791803
2005-01-01	20.2924398030540
2005-04-01	19.9612538804472
2005-07-01	19.9720750779354
2005-10-01	19.8351673980201
2006-01-01	19.2733603222184
2006-04-01	19.0692243758547
2006-07-01	18.6683587936779
2006-10-01	18.4271201207275
2007-01-01	18.8276040556587
2007-04-01	18.6837032386720
2007-07-01	18.9646305678441
2007-10-01	19.1864343716072
2008-01-01	19.1079582375378
2008-04-01	19.1053817628463
2008-07-01	19.0528253862739
2008-10-01	20.1569735693284
2009-01-01	21.4656798823627
2009-04-01	21.2736878859807
2009-07-01	21.0569452415175
2009-10-01	20.7017851837848
2010-01-01	20.5881884039487
2010-04-01	20.0077845476729
2010-07-01	19.6022603529333
2010-10-01	19.4408064054904
2011-01-01	19.0153987172767
2011-04-01	18.8209412021781
2011-07-01	19.0273623220732
2011-10-01	19.2019911027495
2012-01-01	19.4008769846110
2012-04-01	19.3680720191658
2012-07-01	19.4917480950469
2012-10-01	19.6314294620470
2013-01-01	19.6323213886014
2013-04-01	19.9309244705917
2013-07-01	20.2487698029865
2013-10-01	20.4207075702091
2014-01-01	20.5595819188214
2014-04-01	20.9775002487338
2014-07-01	21.3436646285937
2014-10-01	20.9396544620540
2015-01-01	21.9495525627723
2015-04-01	21.4970956242024
2015-07-01	21.3094250193321
2015-10-01	21.6639650167754
2016-01-01	22.3945149650316
2016-04-01	21.8185576345758
2016-07-01	21.7885750752752
2016-10-01	21.4753677043703
2017-01-01	21.9320241833240
2017-04-01	22.0171413944011
2017-07-01	21.7469097293486
2017-10-01	21.7963121736686
2018-01-01	21.8266263176881
2018-04-01	21.4323196067339