Quarter	Percent, Seasonally Adjusted
2004-01-01	5.1
2004-04-01	5.0
2004-07-01	4.9
2004-10-01	5.0
2005-01-01	4.9
2005-04-01	4.9
2005-07-01	4.7
2005-10-01	4.7
2006-01-01	4.4
2006-04-01	4.3
2006-07-01	4.2
2006-10-01	4.1
2007-01-01	3.8
2007-04-01	3.7
2007-07-01	3.9
2007-10-01	3.9
2008-01-01	4.2
2008-04-01	4.4
2008-07-01	4.3
2008-10-01	4.7
2009-01-01	5.1
2009-04-01	5.2
2009-07-01	5.7
2009-10-01	5.8
2010-01-01	6.0
2010-04-01	6.1
2010-07-01	6.0
2010-10-01	6.0
2011-01-01	5.9
2011-04-01	5.8
2011-07-01	6.1
2011-10-01	6.8
2012-01-01	7.5
2012-04-01	8.0
2012-07-01	8.1
2012-10-01	8.7
2013-01-01	9.1
2013-04-01	9.7
2013-07-01	9.7
2013-10-01	9.7
2014-01-01	10.0
2014-04-01	9.5
2014-07-01	9.7
2014-10-01	10.0
2015-01-01	9.8
2015-04-01	9.8
2015-07-01	9.1
2015-10-01	9.1
2016-01-01	9.1
2016-04-01	9.1
2016-07-01	9.3
2016-10-01	9.2
2017-01-01	9.0
2017-04-01	8.8
2017-07-01	8.9
2017-10-01	8.8
2018-01-01	8.7
2018-04-01	8.5