Quarter	Percent, Seasonally Adjusted
1999-01-01	22.4500281901192
1999-04-01	24.0949446519250
1999-07-01	20.2340649651092
1999-10-01	17.0846384267946
2000-01-01	16.9127861840468
2000-04-01	17.3644979049972
2000-07-01	19.2268303799808
2000-10-01	16.4114187314031
2001-01-01	15.4462984045837
2001-04-01	17.2006257161742
2001-07-01	16.2791363039465
2001-10-01	19.1375096542880
2002-01-01	18.2020984842290
2002-04-01	17.3695615735888
2002-07-01	17.2283841315791
2002-10-01	18.3208629616460
2003-01-01	21.5475498183963
2003-04-01	20.4877519101660
2003-07-01	22.0946043504811
2003-10-01	22.4873198707481
2004-01-01	20.6909669710014
2004-04-01	19.7553375040930
2004-07-01	22.5761532336513
2004-10-01	21.6972346314333
2005-01-01	21.3903931648259
2005-04-01	21.8804181566772
2005-07-01	20.7987771381379
2005-10-01	22.1447972729994
2006-01-01	20.9969526609665
2006-04-01	20.5441998669021
2006-07-01	20.4940655284319
2006-10-01	20.0742427559198
2007-01-01	19.0894986470006
2007-04-01	20.8698111070034
2007-07-01	18.0645966595607
2007-10-01	17.2255950817329
2008-01-01	17.0506124386622
2008-04-01	16.0445990945428
2008-07-01	21.0785463653974
2008-10-01	17.8912261458277
2009-01-01	20.9044421106887
2009-04-01	21.5984731365107
2009-07-01	22.3565495724490
2009-10-01	22.8810754939490
2010-01-01	24.8052514716016
2010-04-01	22.5650810656276
2010-07-01	20.9953697178704
2010-10-01	21.3034799362463
2011-01-01	18.9444875434381
2011-04-01	17.9438447906530
2011-07-01	21.2651133167370
2011-10-01	16.7925112065745
2012-01-01	18.9195605222327
2012-04-01	17.6038948924045
2012-07-01	20.2121711709371
2012-10-01	22.2268621256991
2013-01-01	23.2675254780955
2013-04-01	23.8438711868584
2013-07-01	23.1537251535017
2013-10-01	24.5292215351934
2014-01-01	26.1085387271137
2014-04-01	24.6629660982052
2014-07-01	19.9664669459975
2014-10-01	22.1492249153999
2015-01-01	20.4914144159987
2015-04-01	21.5794635914135
2015-07-01	20.9480325657382
2015-10-01	25.5834238611248
2016-01-01	19.9892547435298
2016-04-01	20.4031247438825
2016-07-01	20.4192952890021
2016-10-01	19.7144910912553
2017-01-01	21.5603501193205
2017-04-01	21.0195146811847
2017-07-01	17.8825537796209
2017-10-01	16.6958322850173
2018-01-01	17.0909553888012
2018-04-01	18.9636332802437