Quarterly Percent
1999-04-01 28.8
2000-04-01 29
2001-04-01 28.7
2002-04-01 28.5
2003-04-01 27.9
2004-04-01 27.9
2005-01-01 26.6
2005-04-01 26.3
2005-07-01 26
2005-10-01 26
2006-01-01 25.4
2006-04-01 25.3
2006-07-01 24.8
2006-10-01 24.6
2007-01-01 24.7
2007-04-01 24.8
2007-07-01 24
2007-10-01 24.1
2008-01-01 24.3
2008-04-01 24.3
2008-07-01 23.8
2008-10-01 23.9
2009-01-01 24.1
2009-04-01 23.8
2009-07-01 23.6
2009-10-01 23.3
2010-01-01 23.5
2010-04-01 23.5
2010-07-01 23.2
2010-10-01 23.1
2011-01-01 23.1
2011-04-01 22.9
2011-07-01 22.5
2011-10-01 22.3
2012-01-01 23.1
2012-04-01 23
2012-07-01 22.5
2012-10-01 22.5
2013-01-01 22.6
2013-04-01 22.4
2013-07-01 22.2
2013-10-01 22.2
2014-01-01 22.5
2014-04-01 22.5
2014-07-01 22
2014-10-01 22.1
2015-01-01 22.4
2015-04-01 22.7
2015-07-01 22.4
2015-10-01 22.0
2016-01-01 22.4
2016-04-01 22.5
2016-07-01 21.7
2016-10-01 21.7
2017-01-01 22.1
2017-04-01 22.1
2017-07-01 21.5
2017-10-01 21.2
2018-01-01 21.7
2018-04-01 21.8