Quarter	Percent, Seasonally Adjusted
1998-01-01	21.62457945342890
1998-04-01	22.06185303867570
1998-07-01	22.20236297205340
1998-10-01	22.09325977265440
1999-01-01	21.85059787847540
1999-04-01	22.03578100565630
1999-07-01	21.93955629700260
1999-10-01	21.84855245145280
2000-01-01	21.83082463861350
2000-04-01	22.28906439322180
2000-07-01	22.24869990176720
2000-10-01	23.08291679418820
2001-01-01	21.69749082400040
2001-04-01	21.75998040837240
2001-07-01	22.30682321605580
2001-10-01	21.47110079002270
2002-01-01	21.64546014831690
2002-04-01	21.62763183996290
2002-07-01	21.99793838833800
2002-10-01	21.11993891892350
2003-01-01	20.56786680606650
2003-04-01	19.90839127075340
2003-07-01	19.75253674485060
2003-10-01	19.42989433449350
2004-01-01	21.27998164826440
2004-04-01	21.75494365091400
2004-07-01	21.72685459415230
2004-10-01	21.44936900867970
2005-01-01	20.83809105470530
2005-04-01	20.01060576094840
2005-07-01	20.20412502212350
2005-10-01	19.05222840302570
2006-01-01	19.71862138887300
2006-04-01	18.66441050203620
2006-07-01	18.80889045494990
2006-10-01	18.03161523362580
2007-01-01	18.42650509209170
2007-04-01	18.74980891458570
2007-07-01	18.72678664597170
2007-10-01	19.27332824701470
2008-01-01	18.19946307599620
2008-04-01	19.26052383489100
2008-07-01	18.34019054899580
2008-10-01	19.02200531512520
2009-01-01	18.82306407662440
2009-04-01	18.38065937719080
2009-07-01	18.56529408817230
2009-10-01	17.38708632782100
2010-01-01	17.09284749629360
2010-04-01	16.41257018964870
2010-07-01	15.88004612752410
2010-10-01	15.17711930319670
2011-01-01	14.19383964055590
2011-04-01	13.10070921544390
2011-07-01	12.49238945901610
2011-10-01	11.69639659033000
2012-01-01	10.80020277084310
2012-04-01	10.42118439821370
2012-07-01	9.39299026613312
2012-10-01	9.32819619381974
2013-01-01	8.76493812966459
2013-04-01	8.92629378074835
2013-07-01	9.14743162867516
2013-10-01	9.69421764845005
2014-01-01	10.10452860876030
2014-04-01	11.04070811375110
2014-07-01	11.19880363206470
2014-10-01	11.38991824591330
2015-01-01	11.04095740913660
2015-04-01	11.15385376107270
2015-07-01	10.68616889738500
2015-10-01	10.87379810635500
2016-01-01	10.40374523643240
2016-04-01	10.99024368854630
2016-07-01	11.75913679350140
2016-10-01	11.96807314008360
2017-01-01	12.28035073035770
2017-04-01	12.54011187268710
2017-07-01	12.39376785875130
2017-10-01	12.38820170741530
2018-01-01	11.83692618596500
2018-04-01	12.62850997720490