Quarter	Percent, Seasonally Adjusted
1999-01-01	38.3788201545132
1999-04-01	36.6078927775214
1999-07-01	35.9786135433117
1999-10-01	36.3518004661380
2000-01-01	34.9907156260015
2000-04-01	35.3267215427304
2000-07-01	35.4972447306719
2000-10-01	35.9785885711658
2001-01-01	36.4462823627696
2001-04-01	37.8043408646246
2001-07-01	37.8279584534396
2001-10-01	38.8813819271757
2002-01-01	38.6412106444222
2002-04-01	38.2651987266457
2002-07-01	38.9378601070706
2002-10-01	40.4221224722736
2003-01-01	38.5809259337041
2003-04-01	41.3679704112575
2003-07-01	42.3240453753327
2003-10-01	41.9162730534703
2004-01-01	42.1153176130125
2004-04-01	43.1358318273580
2004-07-01	44.4732277987997
2004-10-01	45.5123503018591
2005-01-01	45.9053394366237
2005-04-01	47.4534272825676
2005-07-01	48.4917837301283
2005-10-01	49.2800042143274
2006-01-01	49.3486287308457
2006-04-01	49.1316406519064
2006-07-01	50.0826293619540
2006-10-01	50.4512453672584
2007-01-01	51.0400862882023
2007-04-01	52.0799158951554
2007-07-01	53.3810717936894
2007-10-01	53.6721777459452
2008-01-01	54.9712622000335
2008-04-01	55.9098582617975
2008-07-01	57.7070137815179
2008-10-01	57.9765053750921
2009-01-01	55.9802729272307
2009-04-01	54.9135410256054
2009-07-01	54.8085451446452
2009-10-01	54.0156345091459
2010-01-01	54.5699250824804
2010-04-01	54.6286909262828
2010-07-01	53.8931560239066
2010-10-01	52.9883402407750
2011-01-01	52.0181532810829
2011-04-01	52.2423566626463
2011-07-01	53.0664459965049
2011-10-01	52.5525625142776
2012-01-01	52.3149226645023
2012-04-01	53.9692337634005
2012-07-01	53.3086270237273
2012-10-01	54.9942801972359
2013-01-01	53.9855138130764
2013-04-01	53.4456226626887
2013-07-01	53.5209329849178
2013-10-01	52.0660697659801
2014-01-01	51.3814703824583
2014-04-01	53.0581620308612
2014-07-01	54.2848023613085
2014-10-01	53.8935024077341
2015-01-01	53.3512392084263
2015-04-01	53.1927744080901
2015-07-01	53.6925738333138
2015-10-01	54.1016117684361
2016-01-01	54.4311159626017
2016-04-01	55.4542256982177
2016-07-01	54.9432718379373
2016-10-01	55.5246315852654
2017-01-01	55.5871769290810
2017-04-01	56.1207889975513
2017-07-01	57.2021843322704
2017-10-01	57.5885206665141
2018-01-01	58.4099110921845
2018-04-01	57.6535197480197