Quarter	Percent, Seasonally Adjusted
2005-01-01	13.4
2005-04-01	13.3
2005-07-01	13.0
2005-10-01	13.0
2006-01-01	12.7
2006-04-01	12.4
2006-07-01	12.5
2006-10-01	12.4
2007-01-01	12.0
2007-04-01	11.6
2007-07-01	11.8
2007-10-01	11.7
2008-01-01	11.7
2008-04-01	12.2
2008-07-01	12.4
2008-10-01	12.9
2009-01-01	14.3
2009-04-01	15.2
2009-07-01	15.8
2009-10-01	15.7
2010-01-01	15.6
2010-04-01	15.8
2010-07-01	15.8
2010-10-01	16.1
2011-01-01	15.9
2011-04-01	15.7
2011-07-01	15.9
2011-10-01	15.6
2012-01-01	15.8
2012-04-01	15.7
2012-07-01	15.6
2012-10-01	16.1
2013-01-01	16.1
2013-04-01	15.8
2013-07-01	15.4
2013-10-01	15.3
2014-01-01	15.2
2014-04-01	14.3
2014-07-01	14.5
2014-10-01	14.5
2015-01-01	13.9
2015-04-01	13.7
2015-07-01	13.3
2015-10-01	12.8
2016-01-01	12.6
2016-04-01	12.7
2016-07-01	12.4
2016-10-01	12.1
2017-01-01	11.8
2017-04-01	11.7
2017-07-01	11.5