Quarter	Percent
2005-01-01	9.7
2005-07-01	6.3
2008-10-01	6.2
2009-01-01	7.9
2009-04-01	9.8
2009-07-01	8.7
2009-10-01	8.9
2010-01-01	10.8
2010-04-01	14.0
2010-07-01	13.2
2010-10-01	10.5
2011-01-01	10.4
2011-04-01	11.7
2011-07-01	11.5
2011-10-01	10.5
2012-01-01	10.1
2012-04-01	11.4
2012-07-01	10.6
2012-10-01	9.9
2013-01-01	9.0
2013-04-01	9.1
2013-07-01	7.5
2013-10-01	9.1
2014-01-01	8.9
2014-04-01	7.7
2014-07-01	6.7
2014-10-01	8.4
2015-01-01	7.9
2015-04-01	7.0
2015-07-01	5.4
2015-10-01	8.3
2016-01-01	7.2
2016-04-01	6.1
2016-07-01	6.9
2016-10-01	5.7
2017-01-01	5.7
2017-04-01	5.9
2017-07-01	7.1
2017-10-01	6.7
2018-01-01	6.4
2018-04-01	7.6