Quarter	Percent, Seasonally Adjusted
1999-01-01	15.51301363428810
1999-04-01	16.01806438753640
1999-07-01	16.65200107544560
1999-10-01	17.42502667538030
2000-01-01	17.93190208069700
2000-04-01	18.73267037962250
2000-07-01	18.89659326394590
2000-10-01	18.56986633709030
2001-01-01	18.63126578772150
2001-04-01	18.72758407359740
2001-07-01	18.77802029616540
2001-10-01	18.80057911084510
2002-01-01	19.09460739476610
2002-04-01	18.88401707802070
2002-07-01	18.42692096105210
2002-10-01	18.36319615461470
2003-01-01	17.68195214067310
2003-04-01	17.41556428617120
2003-07-01	17.73824961327800
2003-10-01	18.22983809276690
2004-01-01	19.54843760029480
2004-04-01	19.79360026530300
2004-07-01	18.95014412420820
2004-10-01	18.55723778806620
2005-01-01	18.11834650646540
2005-04-01	17.22991187178540
2005-07-01	16.92320831788000
2005-10-01	16.70474734910890
2006-01-01	16.09275921691610
2006-04-01	15.12567386262700
2006-07-01	14.28519708019570
2006-10-01	13.57598301718350
2007-01-01	12.67550415729690
2007-04-01	12.78903372869950
2007-07-01	13.02590067499650
2007-10-01	12.36032935224160
2008-01-01	12.02060748225240
2008-04-01	11.42702630505040
2008-07-01	10.32223085350530
2008-10-01	10.08378102365420
2009-01-01	11.30343284974880
2009-04-01	12.42300977813160
2009-07-01	13.21890602211330
2009-10-01	14.48450583625240
2010-01-01	15.31704008272430
2010-04-01	14.82703999750230
2010-07-01	14.27090257327600
2010-10-01	14.14572288069350
2011-01-01	13.84964467017270
2011-04-01	12.97970162601430
2011-07-01	13.31282203720360
2011-10-01	14.48897729858210
2012-01-01	14.43143760226440
2012-04-01	14.15891688236530
2012-07-01	14.51543372994360
2012-10-01	15.13169290008930
2013-01-01	14.97691907519070
2013-04-01	14.59372535695190
2013-07-01	14.46411612941220
2013-10-01	14.25693111803790
2014-01-01	13.86272947976850
2014-04-01	13.58221119386360
2014-07-01	13.58970148445330
2014-10-01	13.66761786779240
2015-01-01	13.35823576329150
2015-04-01	12.80639424560500
2015-07-01	12.89892848663550
2015-10-01	12.74854565749700
2016-01-01	11.68399049926420
2016-04-01	11.03588856111820
2016-07-01	10.68121351822170
2016-10-01	9.86335163926193
2017-01-01	8.88600258391601
2017-04-01	8.27602822459075
2017-07-01	8.35992385865630
2017-10-01	8.40472814788574
2018-01-01	7.53998835613092
2018-04-01	7.19519476108422