Quarter	Percent, Seasonally Adjusted
1999-01-01	30.2328852041863
1999-04-01	30.1959586005654
1999-07-01	29.7425915499821
1999-10-01	29.7380662280601
2000-01-01	29.8495291644737
2000-04-01	29.5496045095592
2000-07-01	29.6303672445328
2000-10-01	29.3803202718018
2001-01-01	29.4421514693761
2001-04-01	29.7936042041102
2001-07-01	29.9061935782777
2001-10-01	30.3034946154694
2002-01-01	30.0980472988308
2002-04-01	30.0991141162625
2002-07-01	30.1373822807040
2002-10-01	30.2412293232417
2003-01-01	29.6677431101570
2003-04-01	28.8770301528046
2003-07-01	28.8264530332206
2003-10-01	28.5897534645001
2004-01-01	29.0948081974488
2004-04-01	29.2233020516416
2004-07-01	29.1577787262201
2004-10-01	28.7321491074470
2005-01-01	28.3332482853005
2005-04-01	27.8836079305944
2005-07-01	27.6579858961319
2005-10-01	27.6622289588355
2006-01-01	26.9408678392444
2006-04-01	26.9379761953157
2006-07-01	27.0214783131533
2006-10-01	26.5202537829459
2007-01-01	26.8573688894937
2007-04-01	27.0757834025082
2007-07-01	26.8608415574650
2007-10-01	26.3062853561031
2008-01-01	26.7985680505882
2008-04-01	26.8813584307557
2008-07-01	26.5179767163768
2008-10-01	26.3618535940453
2009-01-01	26.4188200265872
2009-04-01	26.6076097694623
2009-07-01	26.4518539237989
2009-10-01	26.2128940287531
2010-01-01	25.2105013557316
2010-04-01	25.2748338820713
2010-07-01	25.3122496297093
2010-10-01	25.9703424512730
2011-01-01	26.1253939311920
2011-04-01	25.5615115908502
2011-07-01	25.7353518266413
2011-10-01	25.0382239941240
2012-01-01	24.4793411542271
2012-04-01	23.7371019483704
2012-07-01	23.0047684472824
2012-10-01	22.9691893430646
2013-01-01	23.3475762035750
2013-04-01	22.9996446971074
2013-07-01	22.9907416522092
2013-10-01	22.2777071709754
2014-01-01	21.2296109028714
2014-04-01	21.3973831400912
2014-07-01	21.0997104139837
2014-10-01	21.0058405339708
2015-01-01	20.3504542684801
2015-04-01	20.4695397562810
2015-07-01	20.3246753981854
2015-10-01	20.3925488259286
2016-01-01	20.4375320085315
2016-04-01	20.2393639160972
2016-07-01	20.1369052427914
2016-10-01	19.9062658336491
2017-01-01	19.9530412347205
2017-04-01	19.7189127930129
2017-07-01	19.3566166161814
2017-10-01	19.4399300343592
2018-01-01	19.3636166739463
2018-04-01	18.9937547213370