Quarter	Percent, Seasonally Adjusted
1999-01-01	71.0391282349838
1999-04-01	69.7621291518102
1999-07-01	68.2390057685585
1999-10-01	67.9493879665314
2000-01-01	66.4854760895678
2000-04-01	65.7767053250812
2000-07-01	65.2984774427127
2000-10-01	64.4992594159014
2001-01-01	65.1526029582636
2001-04-01	64.5968761923212
2001-07-01	64.2720941470702
2001-10-01	64.2389319375068
2002-01-01	63.9714036867872
2002-04-01	63.8616104449885
2002-07-01	63.0802814553327
2002-10-01	61.5739044018526
2003-01-01	61.8221247697406
2003-04-01	60.5902709452482
2003-07-01	60.9366917824174
2003-10-01	60.9520157134536
2004-01-01	60.4830591545304
2004-04-01	61.0046385928770
2004-07-01	60.4898763273244
2004-10-01	59.2548092835870
2005-01-01	58.2952324229268
2005-04-01	57.8943366033807
2005-07-01	57.2756281023481
2005-10-01	57.1344273177408
2006-01-01	56.5628565685020
2006-04-01	56.8585561224246
2006-07-01	57.5706285117197
2006-10-01	57.1040944508091
2007-01-01	57.4493706221876
2007-04-01	57.8655425577727
2007-07-01	57.5812223867312
2007-10-01	58.7212901910012
2008-01-01	60.7312928890288
2008-04-01	60.3585296325772
2008-07-01	60.2370203811472
2008-10-01	59.5375456853419
2009-01-01	58.8721026270496
2009-04-01	58.5377843488674
2009-07-01	58.2951935929758
2009-10-01	58.4424271907809
2010-01-01	58.4637024734065
2010-04-01	57.7382306770114
2010-07-01	57.4822062272044
2010-10-01	57.5184719291112
2011-01-01	56.7275019489341
2011-04-01	56.9129640080646
2011-07-01	56.1984815846760
2011-10-01	55.4411997537004
2012-01-01	55.8682297335450
2012-04-01	54.5367262359573
2012-07-01	54.3370361853413
2012-10-01	53.7946672053398
2013-01-01	52.6733263999382
2013-04-01	51.2872214761494
2013-07-01	50.5448866174815
2013-10-01	49.5548436938442
2014-01-01	48.3808877051017
2014-04-01	47.4957968087778
2014-07-01	46.0191443433516
2014-10-01	45.4496094498336
2015-01-01	44.3371414305927
2015-04-01	42.5213474835088
2015-07-01	41.3944986057335
2015-10-01	40.4978946547314
2016-01-01	38.6072850433242
2016-04-01	38.0203479687394
2016-07-01	37.4969157170215
2016-10-01	36.4098585666645
2017-01-01	36.5036412197533
2017-04-01	35.8130952271941
2017-07-01	35.0056138108505
2017-10-01	34.5862734466004
2018-01-01	34.1365177846006
2018-04-01	34.3721619345230