Quarter	Percent, Seasonally Adjusted
1999-01-01	17.05125313889650
1999-04-01	18.63003215507200
1999-07-01	17.82688838571790
1999-10-01	14.97423299102700
2000-01-01	14.53930492506930
2000-04-01	16.14380038205170
2000-07-01	15.07742322936280
2000-10-01	12.51992586841690
2001-01-01	15.12666699542430
2001-04-01	16.48454562587330
2001-07-01	14.22984408997080
2001-10-01	16.86813385357610
2002-01-01	15.52436499947770
2002-04-01	14.83515312824480
2002-07-01	15.63485683647570
2002-10-01	13.96432172202730
2003-01-01	16.17143374891620
2003-04-01	14.44475387626000
2003-07-01	18.29631457717780
2003-10-01	13.64614111117120
2004-01-01	13.94165508734590
2004-04-01	12.49462833821070
2004-07-01	13.85334695200110
2004-10-01	15.18440905739080
2005-01-01	13.50624842385630
2005-04-01	12.28369706880180
2005-07-01	17.00606304248620
2005-10-01	15.42940661554360
2006-01-01	11.79653577694840
2006-04-01	14.77651007382910
2006-07-01	9.30240462604929
2006-10-01	10.68000468073250
2007-01-01	9.21455575199221
2007-04-01	8.17676059676920
2007-07-01	9.20408921435472
2007-10-01	10.92729823101480
2008-01-01	11.18365734420040
2008-04-01	8.86462580652579
2008-07-01	10.01233447600460
2008-10-01	9.41909993051652
2009-01-01	13.47431404967840
2009-04-01	11.81908318495880
2009-07-01	14.64537096012330
2009-10-01	14.92024620705070
2010-01-01	15.17335717511220
2010-04-01	17.95500487223940
2010-07-01	14.31374887204330
2010-10-01	13.34003277223750
2011-01-01	16.10938819820730
2011-04-01	13.78449722187980
2011-07-01	14.97102486930700
2011-10-01	15.18215645796810
2012-01-01	15.53884992126740
2012-04-01	19.01033340491110
2012-07-01	23.76596969791980
2012-10-01	22.74249993163420
2013-01-01	19.90904550382790
2013-04-01	22.48967592498540
2013-07-01	20.42186051139490
2013-10-01	17.34750892815560
2014-01-01	22.36619495160670
2014-04-01	19.14250588155360
2014-07-01	18.86110025226860
2014-10-01	17.27797527823950
2015-01-01	16.50383480153510
2015-04-01	20.26502184035210
2015-07-01	14.60261512503360
2015-10-01	19.21537570970320
2016-01-01	18.30202446820000
2016-04-01	15.18084091685600
2016-07-01	15.05399482429700
2016-10-01	13.77503640891680
2017-01-01	11.10976806157640
2017-04-01	10.35891527774960
2017-07-01	7.55601751663542
2017-10-01	10.71916596439680
2018-01-01	8.06535142434898
2018-04-01	7.76946934898598