Quarter	Percent
2004-01-01	5.5
2004-04-01	4.9
2004-07-01	4.4
2004-10-01	5.1
2005-01-01	5.3
2005-04-01	4.8
2005-07-01	4.2
2005-10-01	4.9
2006-01-01	4.7
2006-04-01	4.1
2006-07-01	3.8
2006-10-01	4.4
2007-01-01	4.2
2007-04-01	3.6
2007-07-01	3.4
2007-10-01	4.0
2008-01-01	4.7
2008-04-01	4.4
2008-07-01	3.8
2008-10-01	4.8
2009-01-01	5.6
2009-04-01	5.2
2009-07-01	5.2
2009-10-01	5.9
2010-01-01	6.5
2010-04-01	6.0
2010-07-01	5.5
2010-10-01	6.2
2011-01-01	6.4
2011-04-01	5.7
2011-07-01	5.4
2011-10-01	7.0
2012-01-01	8.2
2012-04-01	8.0
2012-07-01	7.2
2012-10-01	8.8
2013-01-01	9.8
2013-04-01	9.7
2013-07-01	8.9
2013-10-01	9.9
2014-01-01	10.7
2014-04-01	9.4
2014-07-01	9.0
2014-10-01	10.2
2015-01-01	10.4
2015-04-01	9.8
2015-07-01	8.3
2015-10-01	9.3
2016-01-01	9.7
2016-04-01	9.0
2016-07-01	8.7
2016-10-01	9.4
2017-01-01	9.7
2017-04-01	8.7
2017-07-01	8.2
2017-10-01	8.9
2018-01-01	9.3
2018-04-01	8.6