Quarterly Percent
1998-04-01 27.8
1999-04-01 26
2000-04-01 26.6
2001-01-01 25.2
2001-04-01 24
2001-07-01 23.2
2001-10-01 24.7
2002-01-01 24.8
2002-04-01 23.9
2002-07-01 23.2
2002-10-01 25.1
2003-01-01 25.1
2003-04-01 24
2003-07-01 23.8
2003-10-01 25.5
2004-01-01 25.7
2004-04-01 24.5
2004-07-01 23.5
2004-10-01 25.7
2005-01-01 26.4
2005-04-01 22.8
2005-07-01 23.1
2005-10-01 24.3
2006-01-01 24.7
2006-04-01 22.9
2006-07-01 22.5
2006-10-01 24.8
2007-01-01 24.7
2007-04-01 22.3
2007-07-01 22.1
2007-10-01 23.8
2008-01-01 24
2008-04-01 22
2008-07-01 22.1
2008-10-01 24.2
2009-01-01 24.1
2009-04-01 22.2
2009-07-01 23.2
2009-10-01 24.9
2010-01-01 24.8
2010-04-01 22.8
2010-07-01 22.8
2010-10-01 24.7
2011-01-01 23.7
2011-04-01 21.6
2011-07-01 22
2011-10-01 23.3
2012-01-01 23.2
2012-04-01 21
2012-07-01 21.2
2012-10-01 22.9
2013-01-01 22.5
2013-04-01 20.3
2013-07-01 20.4
2013-10-01 21.8
2014-01-01 21.8
2014-04-01 19.8
2014-07-01 19.4
2014-10-01 21.8
2015-01-01 21.1
2015-04-01 19.2
2015-07-01 19.3
2015-10-01 20.8
2016-01-01 20.6
2016-04-01 18.8
2016-07-01 19.3
2016-10-01 20.6
2017-01-01 20.0
2017-04-01 18.6
2017-07-01 18.5
2017-10-01 20.3
2018-01-01 20.1
2018-04-01 17.9