Quarter	Percent
2000-04-01	7.1
2001-04-01	7.4
2002-04-01	7.4
2003-04-01	7.2
2004-04-01	7.3
2005-01-01	7.3
2005-04-01	7.1
2005-07-01	7.2
2005-10-01	7.1
2006-01-01	7.1
2006-04-01	7.0
2006-07-01	7.1
2006-10-01	7.1
2007-01-01	7.2
2007-04-01	7.0
2007-07-01	7.0
2007-10-01	7.1
2008-01-01	7.2
2008-04-01	7.0
2008-07-01	7.1
2008-10-01	7.1
2009-01-01	7.4
2009-04-01	7.4
2009-07-01	7.7
2009-10-01	7.5
2010-01-01	7.7
2010-04-01	7.5
2010-07-01	7.7
2010-10-01	7.7
2011-01-01	7.9
2011-04-01	7.7
2011-07-01	7.9
2011-10-01	7.8
2012-01-01	7.9
2012-04-01	7.7
2012-07-01	7.9
2012-10-01	7.8
2013-01-01	8.1
2013-04-01	8.0
2013-07-01	8.3
2013-10-01	8.3
2014-01-01	8.5
2014-04-01	8.5
2014-07-01	8.6
2014-10-01	8.3
2015-01-01	8.7
2015-04-01	8.5
2015-07-01	8.6
2015-10-01	8.5
2016-01-01	8.8
2016-04-01	8.5
2016-07-01	8.6
2016-10-01	8.6
2017-01-01	8.8
2017-04-01	8.5
2017-07-01	8.6
2017-10-01	8.6
2018-01-01	8.7
2018-04-01	8.4