Quarterly Percent
1999-04-01 14.8
2000-04-01 14.6
2001-04-01 14.4
2002-04-01 14.3
2003-04-01 13.9
2004-04-01 14.1
2005-01-01 13.6
2005-04-01 13.5
2005-07-01 13.7
2005-10-01 13.7
2006-01-01 13
2006-04-01 12.9
2006-07-01 12.8
2006-10-01 13
2007-01-01 12.7
2007-04-01 12.9
2007-07-01 12.7
2007-10-01 12.7
2008-01-01 13.1
2008-04-01 13.1
2008-07-01 12.7
2008-10-01 12.8
2009-01-01 13.1
2009-04-01 12.9
2009-07-01 12.9
2009-10-01 12.5
2010-01-01 13
2010-04-01 12.6
2010-07-01 12.7
2010-10-01 12.6
2011-01-01 12.7
2011-04-01 12.3
2011-07-01 12.2
2011-10-01 12
2012-01-01 12.4
2012-04-01 12.3
2012-07-01 12.3
2012-10-01 12.2
2013-01-01 12.4
2013-04-01 12.1
2013-07-01 12.3
2013-10-01 12.4
2014-01-01 12.6
2014-04-01 12.4
2014-07-01 12.3
2014-10-01 12.5
2015-01-01 12.4
2015-04-01 12.4
2015-07-01 12.6
2015-10-01 12.4
2016-01-01 12.7
2016-04-01 12.8
2016-07-01 12.5
2016-10-01 12.5
2017-01-01 12.8
2017-04-01 12.9
2017-07-01 12.6
2017-10-01 12.5
2018-01-01 12.4
2018-04-01 12.5