Quarter	Percent, Seasonally Adjusted
1999-01-01	39.3586601003622
1999-04-01	38.8647400910161
1999-07-01	39.4067275824490
1999-10-01	39.3455918451200
2000-01-01	39.3731583580265
2000-04-01	39.4055354834278
2000-07-01	38.4188993083442
2000-10-01	38.7652374779359
2001-01-01	38.4267142532353
2001-04-01	38.9241432326956
2001-07-01	38.0407629447539
2001-10-01	38.4706618599279
2002-01-01	37.5220330455259
2002-04-01	38.3020555044966
2002-07-01	39.6405578321666
2002-10-01	39.9946750112874
2003-01-01	39.6543152618207
2003-04-01	39.7146074018706
2003-07-01	40.4649029387959
2003-10-01	38.7530180946174
2004-01-01	37.7351052632955
2004-04-01	37.1528145401216
2004-07-01	36.4676202421408
2004-10-01	37.2298060613168
2005-01-01	36.5889090121963
2005-04-01	37.2723128747402
2005-07-01	36.4578641983762
2005-10-01	35.6283079111717
2006-01-01	36.0497218582732
2006-04-01	35.7227025582299
2006-07-01	36.4413247067125
2006-10-01	36.7746340408592
2007-01-01	36.4031270929167
2007-04-01	35.2990719028279
2007-07-01	35.5124292604265
2007-10-01	36.0522019790949
2008-01-01	36.0906209846578
2008-04-01	35.9819367796407
2008-07-01	35.1017369647210
2008-10-01	35.7112741825631
2009-01-01	36.4078866208382
2009-04-01	35.7085328944978
2009-07-01	35.1413593163448
2009-10-01	35.2844502368195
2010-01-01	35.3186375996797
2010-04-01	35.6837507023778
2010-07-01	36.3141778708456
2010-10-01	35.4743858712286
2011-01-01	36.9766753092822
2011-04-01	37.0654363613536
2011-07-01	36.9663850949910
2011-10-01	36.6006886785770
2012-01-01	36.4660117552736
2012-04-01	37.7838080993523
2012-07-01	37.2436978717572
2012-10-01	36.5985312059958
2013-01-01	37.3422747577455
2013-04-01	37.0417188756349
2013-07-01	36.8086458982606
2013-10-01	37.2173771245804
2014-01-01	36.5830075778908
2014-04-01	36.1067884843930
2014-07-01	36.9621127540187
2014-10-01	36.7537107791469
2015-01-01	37.0265036796231
2015-04-01	36.4123821576731
2015-07-01	36.1530620123007
2015-10-01	37.1766528948849
2016-01-01	37.6949672948825
2016-04-01	37.1453956176405
2016-07-01	37.6289124199756
2016-10-01	36.4022585800396
2017-01-01	35.4441816248246
2017-04-01	35.6960044604459
2017-07-01	34.8369224084942
2017-10-01	34.4848153436928
2018-01-01	34.4481191915977
2018-04-01	34.2984495777030