Quarter	Percent, Seasonally Adjusted
1999-01-01	11.80816679947240
1999-04-01	12.66505165752830
1999-07-01	13.45921733295010
1999-10-01	14.31003693884490
2000-01-01	15.05563565715050
2000-04-01	15.50276726546510
2000-07-01	15.70548379337510
2000-10-01	15.52010981503320
2001-01-01	16.02214989006150
2001-04-01	15.83714571390880
2001-07-01	15.87767131855980
2001-10-01	15.76712159494810
2002-01-01	15.59587936267970
2002-04-01	15.41592436497690
2002-07-01	15.34541198318960
2002-10-01	15.02380388826880
2003-01-01	15.00460250350960
2003-04-01	14.69268540270590
2003-07-01	15.00643096714860
2003-10-01	15.55310445808830
2004-01-01	16.36915187008160
2004-04-01	16.33326899347820
2004-07-01	15.96288077399890
2004-10-01	15.56142135589140
2005-01-01	15.20172706162880
2005-04-01	14.80478311684520
2005-07-01	14.19116462285850
2005-10-01	13.62406370324820
2006-01-01	12.92472124171860
2006-04-01	12.13084738189510
2006-07-01	11.41736809484890
2006-10-01	11.04155792243420
2007-01-01	10.57953339397540
2007-04-01	10.38605191421650
2007-07-01	10.16965778073390
2007-10-01	9.70484699225005
2008-01-01	9.37032627756825
2008-04-01	9.06055747438679
2008-07-01	8.14056202542729
2008-10-01	8.28574335676518
2009-01-01	9.25657159392492
2009-04-01	10.20864350359020
2009-07-01	11.33051376073770
2009-10-01	12.43327239963770
2010-01-01	13.19933282145390
2010-04-01	13.09226333798660
2010-07-01	12.82908645523410
2010-10-01	12.19022196910330
2011-01-01	12.23182373496730
2011-04-01	11.90185443488880
2011-07-01	12.03160709731690
2011-10-01	12.25374507462350
2012-01-01	12.22918601301820
2012-04-01	12.37560007173520
2012-07-01	12.31353757037390
2012-10-01	12.58048020938810
2013-01-01	12.90436108823150
2013-04-01	12.74738966390210
2013-07-01	12.95373702544580
2013-10-01	12.72583463222340
2014-01-01	12.41991086415970
2014-04-01	12.23500587983750
2014-07-01	11.95752739333390
2014-10-01	11.54737633417380
2015-01-01	11.23959087679720
2015-04-01	10.68554609498100
2015-07-01	10.23272147321720
2015-10-01	9.73781718904751
2016-01-01	9.13499490764076
2016-04-01	8.72430136107138
2016-07-01	8.55416453062099
2016-10-01	8.21298229760929
2017-01-01	8.13542259127466
2017-04-01	7.73415814248722
2017-07-01	7.38686594964936
2017-10-01	7.10361932929775
2018-01-01	6.65035047982246
2018-04-01	6.50952855917463