Quarter	Percent
2005-01-01	9.5
2005-04-01	8.6
2005-10-01	6.0
2008-10-01	7.8
2009-01-01	9.8
2009-04-01	10.8
2009-07-01	15.1
2009-10-01	14.0
2010-01-01	18.9
2010-04-01	19.8
2010-07-01	15.0
2010-10-01	13.7
2011-01-01	17.3
2011-04-01	16.6
2011-07-01	14.0
2011-10-01	15.8
2012-01-01	15.5
2012-04-01	11.4
2012-07-01	12.5
2012-10-01	14.5
2013-01-01	14.6
2013-04-01	13.6
2013-07-01	12.6
2013-10-01	14.9
2014-01-01	16.0
2014-04-01	12.8
2014-07-01	11.8
2014-10-01	14.4
2015-01-01	9.9
2015-04-01	12.0
2015-07-01	10.3
2015-10-01	10.1
2016-01-01	9.9
2016-04-01	9.9
2016-07-01	8.5
2016-10-01	8.6
2017-01-01	9.7
2017-04-01	8.5
2017-07-01	7.3
2017-10-01	8.1
2018-01-01	8.6
2018-04-01	8.4