Quarter	Percent
1999-04-01	7.7
2000-04-01	7.4
2001-04-01	6.4
2002-04-01	7.2
2003-04-01	8.1
2004-04-01	10.2
2005-01-01	13.2
2005-04-01	13.6
2005-07-01	16.3
2005-10-01	13.1
2006-01-01	12
2006-04-01	12.1
2006-07-01	14.3
2006-10-01	11.9
2007-01-01	10.9
2007-04-01	11.3
2007-07-01	11.8
2007-10-01	10.3
2008-01-01	9.5
2008-04-01	10.2
2008-07-01	11.7
2008-10-01	8.6
2009-01-01	9.0
2009-04-01	9.9
2009-07-01	11.5
2009-10-01	8.8
2010-01-01	9.3
2010-04-01	8.5
2010-07-01	9.7
2010-10-01	7.7
2011-01-01	8.2
2011-04-01	7.4
2011-07-01	8.9
2011-10-01	6.6
2012-01-01	6.9
2012-04-01	6.7
2012-07-01	9.1
2012-10-01	6.5
2013-01-01	6.7
2013-04-01	6.7
2013-07-01	8.2
2013-10-01	6.7
2014-01-01	6.9
2014-04-01	6.7
2014-07-01	8.4
2014-10-01	6.2
2015-01-01	6.9
2015-04-01	5.7
2015-07-01	7.8
2015-10-01	5.6
2016-01-01	6.4
2016-04-01	5.9
2016-07-01	6.9
2016-10-01	5.2
2017-01-01	5.8
2017-04-01	5.8
2017-07-01	6.1
2017-10-01	5.4
2018-01-01	5.5
2018-04-01	5.2