Quarter	Percent, Seasonally Adjusted
1999-04-01	20.8433216731003
1999-07-01	20.5539606862752
1999-10-01	20.2879946954642
2000-01-01	20.1670979314363
2000-04-01	20.0293809097991
2000-07-01	20.0279725504199
2000-10-01	20.1430057741368
2001-01-01	20.1014584656085
2001-04-01	20.0708663171137
2001-07-01	19.8903117512818
2001-10-01	20.2717214648960
2002-01-01	20.5354675062348
2002-04-01	20.7086322773090
2002-07-01	20.9673969098342
2002-10-01	20.8111191875125
2003-01-01	20.8104157582137
2003-04-01	20.7842833638992
2003-07-01	20.8029950259430
2003-10-01	20.4785872761021
2004-01-01	20.1887014592599
2004-04-01	20.2341623515485
2004-07-01	20.0292975584893
2004-10-01	19.8772602108947
2005-01-01	19.8460718723864
2005-04-01	19.5541677109972
2005-07-01	19.0902574169793
2005-10-01	18.9682983798171
2006-01-01	18.5133345717727
2006-04-01	18.4308387561412
2006-07-01	18.1602794905546
2006-10-01	18.1881986096923
2007-01-01	14.7891785418227
2007-04-01	15.0962733042229
2007-07-01	15.4615178424141
2007-10-01	15.6145177994055
2008-01-01	15.8203022010500
2008-04-01	16.1745542777117
2008-07-01	16.5023208715840
2008-10-01	17.2831388240272
2009-01-01	18.3602879292110
2009-04-01	18.7354557729380
2009-07-01	19.9030363745742
2009-10-01	20.3000798591967
2010-01-01	20.7936318789623
2010-04-01	21.1701516738133
2010-07-01	21.5048651776074
2010-10-01	21.8189192661850
2011-01-01	21.9331581675980
2011-04-01	22.0938830888077
2011-07-01	22.4012219087590
2011-10-01	21.5551520974756
2012-01-01	21.9612368735474
2012-04-01	22.2327324338442
2012-07-01	22.1382935385284
2012-10-01	22.3388360848489
2013-01-01	22.0839796024076
2013-04-01	21.6350921115107
2013-07-01	21.5550082365868
2013-10-01	21.3172450369019
2014-01-01	21.3561136848924
2014-04-01	21.6415595967507
2014-07-01	21.5013943526176
2014-10-01	21.2494595129408
2015-01-01	20.9813680004837
2015-04-01	21.0051102666456
2015-07-01	21.1000844230102
2015-10-01	21.0244858679519
2016-01-01	21.0399615337620
2016-04-01	20.6156230908549
2016-07-01	20.5470269340108
2016-10-01	20.9688290248248
2017-01-01	21.0977448153531
2017-04-01	21.3136992352384
2017-07-01	21.3355730242473
2017-10-01	21.1460220755757
2018-01-01	21.0983277050934
2018-04-01	21.1827682553726