Quarter	Percent, Seasonally Adjusted
1999-01-01	12.62835031347140
1999-04-01	13.06137375147730
1999-07-01	13.58420862455910
1999-10-01	14.40794723787690
2000-01-01	15.17089550782130
2000-04-01	15.80880613491120
2000-07-01	16.28633352701780
2000-10-01	15.80826254612970
2001-01-01	15.94712250111920
2001-04-01	15.69844652916330
2001-07-01	15.71416005198010
2001-10-01	15.70923443295560
2002-01-01	16.28870552867140
2002-04-01	15.78334660541520
2002-07-01	15.80634023536730
2002-10-01	15.42358605891540
2003-01-01	15.34374287806960
2003-04-01	15.23706363496380
2003-07-01	15.73603173605980
2003-10-01	16.42976368062670
2004-01-01	17.72745922186130
2004-04-01	17.91033810526600
2004-07-01	17.58528113211970
2004-10-01	16.99348594250330
2005-01-01	16.55135717917470
2005-04-01	15.99410118785880
2005-07-01	15.50830140655840
2005-10-01	15.10370537173010
2006-01-01	14.64671729777240
2006-04-01	13.88846745320920
2006-07-01	12.91339333636840
2006-10-01	12.59488541628520
2007-01-01	12.19139443253090
2007-04-01	12.25384385517130
2007-07-01	12.09570625836790
2007-10-01	11.55309511412210
2008-01-01	11.14463536967130
2008-04-01	10.42530835674080
2008-07-01	9.73786319077718
2008-10-01	9.53875934687713
2009-01-01	10.39968825786540
2009-04-01	11.31176117795630
2009-07-01	12.22328877490350
2009-10-01	13.10330032547450
2010-01-01	13.91184546491040
2010-04-01	13.56990081410200
2010-07-01	13.27730540159730
2010-10-01	12.51798922240750
2011-01-01	12.65941820150100
2011-04-01	12.16210850947120
2011-07-01	12.42784436275610
2011-10-01	12.82438274484480
2012-01-01	13.19671781091230
2012-04-01	13.27614953500040
2012-07-01	13.54460327315000
2012-10-01	13.74897871782130
2013-01-01	14.28396727128320
2013-04-01	13.64693432827090
2013-07-01	13.56686570276370
2013-10-01	12.91849239725650
2014-01-01	12.70814136020500
2014-04-01	12.49475035553460
2014-07-01	12.73480515242110
2014-10-01	12.77043055440300
2015-01-01	12.56399356797260
2015-04-01	12.48554679467410
2015-07-01	12.11118886453670
2015-10-01	11.54516769054750
2016-01-01	10.72215535535920
2016-04-01	10.02612416241760
2016-07-01	9.62860731282299
2016-10-01	8.85583973783882
2017-01-01	8.55355052635082
2017-04-01	8.07092919352524
2017-07-01	7.62260711981320
2017-10-01	7.55567739614298
2018-01-01	7.10282595329089
2018-04-01	7.07763646242912