Quarter	Percent, Seasonally Adjusted
1999-04-01	50.4756521211120
1999-07-01	50.5684135876263
1999-10-01	50.3541654897642
2000-01-01	50.2072979303603
2000-04-01	50.4831260520628
2000-07-01	49.9952965591079
2000-10-01	49.6941083214943
2001-01-01	49.2361413845266
2001-04-01	48.5746227696907
2001-07-01	48.8598414894284
2001-10-01	48.4406531746630
2002-01-01	48.7219569098903
2002-04-01	47.9933411503058
2002-07-01	47.8718350031322
2002-10-01	47.9280433733845
2003-01-01	47.8988950258934
2003-04-01	48.8469432367954
2003-07-01	48.6629213169274
2003-10-01	48.4627520384265
2004-01-01	48.7994189196785
2004-04-01	47.9166144451222
2004-07-01	48.7076361795265
2004-10-01	49.8595781098569
2005-01-01	49.4642595381488
2005-04-01	50.1569067806194
2005-07-01	49.9052557204982
2005-10-01	49.9520413546592
2006-01-01	50.2200241297144
2006-04-01	49.9868975433970
2006-07-01	51.3615108490170
2006-10-01	50.6982964138789
2007-01-01	63.9562039852627
2007-04-01	65.1640720130498
2007-07-01	63.5802253683088
2007-10-01	64.0202316507438
2008-01-01	63.1227331102018
2008-04-01	62.4962137109888
2008-07-01	62.1385164992537
2008-10-01	59.6436565480896
2009-01-01	59.9495819257845
2009-04-01	58.6769582851888
2009-07-01	55.8781803332873
2009-10-01	54.9554977585554
2010-01-01	52.0350319467209
2010-04-01	51.7803577961366
2010-07-01	51.1759402550326
2010-10-01	51.7411712070220
2011-01-01	50.6246158782806
2011-04-01	49.2538249919985
2011-07-01	48.1042951754251
2011-10-01	48.5150387778094
2012-01-01	49.1239559265984
2012-04-01	48.6346595449175
2012-07-01	48.6303306974931
2012-10-01	48.1126188757693
2013-01-01	48.1706082405132
2013-04-01	49.0410944017872
2013-07-01	48.1090415544102
2013-10-01	47.0678407067697
2014-01-01	46.3422958504765
2014-04-01	44.8702339449270
2014-07-01	46.3490049481631
2014-10-01	45.7667935663632
2015-01-01	45.0025770071801
2015-04-01	44.1486271020004
2015-07-01	44.7436788417628
2015-10-01	44.4280522230639
2016-01-01	44.7058372918027
2016-04-01	50.5409956244640
2016-07-01	49.4565527455739
2016-10-01	48.8306704975705
2017-01-01	48.1602286944540
2017-04-01	47.1673849273372
2017-07-01	43.0446292824688
2017-10-01	43.6316321939269
2018-01-01	43.8083087373977
2018-04-01	44.5600053944089