Quarter	Percent, Seasonally Adjusted
1999-01-01	16.62416627716680
1999-04-01	19.67877972438680
1999-07-01	17.73414456216720
1999-10-01	16.20086628290060
2000-01-01	16.96127801950760
2000-04-01	17.55034312077730
2000-07-01	16.15573456039360
2000-10-01	14.73103028962490
2001-01-01	16.38699716118250
2001-04-01	17.05127619790000
2001-07-01	17.70679581598520
2001-10-01	20.16421814901480
2002-01-01	16.54719714702320
2002-04-01	16.08635286402140
2002-07-01	17.67100149833060
2002-10-01	15.88026031208200
2003-01-01	17.82594813748990
2003-04-01	16.60251407538250
2003-07-01	19.14765776278230
2003-10-01	16.01868163342490
2004-01-01	16.62755050026240
2004-04-01	15.30156917661150
2004-07-01	15.32779736123100
2004-10-01	17.21459129569650
2005-01-01	16.21693344289990
2005-04-01	14.16971214735800
2005-07-01	17.10727748375030
2005-10-01	16.26019656919790
2006-01-01	16.35513652295010
2006-04-01	15.61184220953550
2006-07-01	11.97000602999060
2006-10-01	11.27060053676310
2007-01-01	10.43513125513100
2007-04-01	8.70906738980734
2007-07-01	9.65464701501367
2007-10-01	11.60396448639690
2008-01-01	11.64979322718040
2008-04-01	10.17534108637120
2008-07-01	10.03594651632840
2008-10-01	9.95330184678474
2009-01-01	12.96892791357060
2009-04-01	13.29703354019990
2009-07-01	14.12931548743900
2009-10-01	13.87311438131620
2010-01-01	13.29813194825310
2010-04-01	16.95716167966940
2010-07-01	14.18941160363280
2010-10-01	14.11882745369460
2011-01-01	17.08092716978210
2011-04-01	14.38333453144500
2011-07-01	15.16937769900600
2011-10-01	16.19531839443690
2012-01-01	17.40094270330540
2012-04-01	19.08713693160140
2012-07-01	23.42760122114520
2012-10-01	22.58447509771880
2013-01-01	21.35608947020760
2013-04-01	25.74311206858170
2013-07-01	20.32810905467940
2013-10-01	18.60674242196440
2014-01-01	21.90138670897980
2014-04-01	20.58774385300860
2014-07-01	20.09878056921440
2014-10-01	18.37880847675360
2015-01-01	17.55594904061570
2015-04-01	16.83974150391320
2015-07-01	14.19010743527810
2015-10-01	16.51208365001100
2016-01-01	16.23572628317900
2016-04-01	14.97723982983200
2016-07-01	14.99023395342790
2016-10-01	14.54436582684730
2017-01-01	10.42750261695580
2017-04-01	10.99945645231870
2017-07-01	11.83152349765640
2017-10-01	11.55497609841070
2018-01-01	9.68494317350856
2018-04-01	8.90361384363061