Quarter	Percent, Seasonally Adjusted
1999-01-01	15.62500000000000
1999-04-01	15.89863750759350
1999-07-01	16.79435310321080
1999-10-01	17.30950949231170
2000-01-01	18.08124313824850
2000-04-01	18.61512319456240
2000-07-01	19.07455881111200
2000-10-01	18.42260153031190
2001-01-01	18.76194432904030
2001-04-01	18.55893377759270
2001-07-01	18.88511554708850
2001-10-01	18.66144357392900
2002-01-01	19.21298242663750
2002-04-01	18.78257945182440
2002-07-01	18.54448339175430
2002-10-01	18.27831174258250
2003-01-01	17.80867817054780
2003-04-01	17.28291785176510
2003-07-01	17.85033562608770
2003-10-01	18.05209888833580
2004-01-01	19.66506383684300
2004-04-01	19.63307321932590
2004-07-01	19.06525137826050
2004-10-01	18.39966832504150
2005-01-01	18.22515891602540
2005-04-01	17.11184601034510
2005-07-01	16.99561403508770
2005-10-01	16.59238079219580
2006-01-01	16.13231552162850
2006-04-01	15.02792350651550
2006-07-01	14.30972187211160
2006-10-01	13.49099478202320
2007-01-01	12.72742658881270
2007-04-01	12.68764311763210
2007-07-01	13.08891698272230
2007-10-01	12.23039625480690
2008-01-01	12.09589842118450
2008-04-01	11.29248283944420
2008-07-01	10.42216358839050
2008-10-01	9.93079296256149
2009-01-01	11.39979688557890
2009-04-01	12.26828446242000
2009-07-01	13.30833333333330
2009-10-01	14.32135728542910
2010-01-01	15.36926147704590
2010-04-01	14.67386788533440
2010-07-01	14.33388157894740
2010-10-01	14.04808959156790
2011-01-01	13.90885262534880
2011-04-01	12.87196055092670
2011-07-01	13.35466487032670
2011-10-01	14.37562940584090
2012-01-01	14.46325798648760
2012-04-01	14.04152422246310
2012-07-01	14.58575460733850
2012-10-01	15.01087138317440
2013-01-01	15.04505249235350
2013-04-01	14.43917062203350
2013-07-01	14.52610739915860
2013-10-01	14.11154131312300
2014-01-01	13.93022486772490
2014-04-01	13.44014610659140
2014-07-01	13.62474226804120
2014-10-01	13.54252007209570
2015-01-01	13.34040469973890
2015-04-01	12.69620667102680
2015-07-01	12.86880607873250
2015-10-01	12.67729786040550
2016-01-01	11.63052208835340
2016-04-01	11.01837733729240
2016-07-01	10.57092595554130
2016-10-01	9.81992797118848
2017-01-01	8.74729154963486
2017-04-01	8.29652236768131
2017-07-01	8.18341028498647
2017-10-01	8.41374910279927
2018-01-01	7.36230949117007
2018-04-01	7.18285853420989