Quarterly Percent
1999-01-01 23.6
2000-01-01 23
2000-04-01 22.9
2000-07-01 23.9
2000-10-01 24.3
2001-01-01 24
2001-04-01 23
2001-07-01 23.5
2001-10-01 24.5
2002-01-01 24.4
2002-04-01 23.8
2002-07-01 23.9
2002-10-01 24.8
2003-01-01 24.4
2003-04-01 23.8
2003-07-01 24.3
2003-10-01 24.5
2004-01-01 23.9
2004-04-01 24.1
2004-07-01 24.2
2004-10-01 23.8
2005-01-01 24.3
2005-04-01 24
2005-07-01 23.1
2005-10-01 22.9
2006-01-01 24.9
2006-04-01 25
2006-07-01 24
2006-10-01 24.5
2007-01-01 25.4
2007-04-01 24.5
2007-07-01 23.9
2007-10-01 23.8
2008-01-01 24.7
2008-04-01 24.3
2008-07-01 23.1
2008-10-01 22.8
2009-01-01 23.1
2009-04-01 22.7
2009-07-01 22.4
2009-10-01 22
2010-01-01 21.7
2010-04-01 21.1
2010-07-01 21.4
2010-10-01 21.5
2011-01-01 21.3
2011-04-01 21.4
2011-07-01 21.5
2011-10-01 21.1
2012-01-01 21.1
2012-04-01 20.9
2012-07-01 20.7
2012-10-01 20.8
2013-01-01 21.4
2013-04-01 21.2
2013-07-01 20.6
2013-10-01 20.4
2014-01-01 20.2
2014-04-01 20.9
2014-07-01 20.4
2014-10-01 19.9
2015-01-01 20.3
2015-04-01 20.4
2015-07-01 20.5
2015-10-01 20.5
2016-01-01 20.8
2016-04-01 20.8
2016-07-01 21.0
2016-10-01 21.5
2017-01-01 21.0
2017-04-01 20.6
2017-07-01 21.7
2017-10-01 21.7
2018-01-01 21.0
2018-04-01 20.6