Quarter	Percent, Seasonally Adjusted
1999-01-01	23.7586374294924
1999-04-01	23.3307904980381
1999-07-01	22.9011432713572
1999-10-01	22.5569790013962
2000-01-01	22.2628383712550
2000-04-01	22.0799350813041
2000-07-01	21.8430851648738
2000-10-01	21.6570652182106
2001-01-01	23.7577355405357
2001-04-01	23.6547181725876
2001-07-01	23.2998414992825
2001-10-01	22.9660023756730
2002-01-01	22.1932816651325
2002-04-01	21.5640994419908
2002-07-01	21.1170735893797
2002-10-01	21.0592643685191
2003-01-01	20.6126250497352
2003-04-01	20.2572210391797
2003-07-01	19.7749868647730
2003-10-01	19.5421896108803
2004-01-01	19.6023534029194
2004-04-01	19.2856816632210
2004-07-01	18.9481980846643
2004-10-01	18.6483986543023
2005-01-01	19.0905863669877
2005-04-01	18.7300687716411
2005-07-01	18.7990874761264
2005-10-01	18.4967593796495
2006-01-01	18.0737328387801
2006-04-01	17.8096205060558
2006-07-01	17.6259827301127
2006-10-01	17.3504597764082
2007-01-01	17.1586454622835
2007-04-01	16.9896399254077
2007-07-01	16.8354999990321
2007-10-01	16.6672188131355
2008-01-01	16.3536493310413
2008-04-01	16.0469190696658
2008-07-01	15.9800398895815
2008-10-01	15.5286696049248
2009-01-01	15.1646948061166
2009-04-01	15.2373505599912
2009-07-01	15.2984168515791
2009-10-01	15.0054965557331
2010-01-01	14.6700536557695
2010-04-01	14.2367836525725
2010-07-01	14.1568483733244
2010-10-01	14.1111699777335
2011-01-01	14.1026189239333
2011-04-01	13.7551240771365
2011-07-01	13.7057925225354
2011-10-01	13.6235660462108
2012-01-01	13.3163541853047
2012-04-01	13.2148829820548
2012-07-01	12.9498680791973
2012-10-01	12.9044452834011
2013-01-01	12.8723721990619
2013-04-01	12.9664973431625
2013-07-01	12.7551093287616
2013-10-01	12.7592825296289
2014-01-01	12.9488526377867
2014-04-01	12.6672550185529
2014-07-01	12.7179580476328
2014-10-01	12.4053444101342
2015-01-01	12.6922754826380
2015-04-01	12.3563481417628
2015-07-01	12.7898216805659
2015-10-01	12.7564073544775
2016-01-01	12.6499423709286
2016-04-01	12.5108764522509
2016-07-01	12.4751471015716
2016-10-01	12.7137020468621
2017-01-01	12.8138655490902
2017-04-01	13.0737212358978
2017-07-01	13.0327352669920
2017-10-01	13.0061710251903
2018-01-01	13.1633651748477
2018-04-01	13.0550317944277
2018-07-01	13.0633324191721