Quarterly Percent
1999-04-01 27.6
2000-01-01 28
2000-04-01 27
2000-07-01 26.5
2000-10-01 25.8
2001-01-01 25.9
2001-04-01 25.8
2001-07-01 26
2001-10-01 25.1
2002-01-01 24.4
2002-04-01 24.6
2002-07-01 24.4
2002-10-01 23.6
2003-01-01 22.9
2003-04-01 23.4
2003-07-01 23
2003-10-01 22.5
2004-01-01 22.4
2004-04-01 22
2004-07-01 22.2
2004-10-01 21.6
2005-01-01 21.4
2005-04-01 21.2
2005-07-01 21.3
2005-10-01 20.2
2006-01-01 20
2006-04-01 20.2
2006-07-01 20.2
2006-10-01 19.4
2007-01-01 19.2
2007-04-01 18.9
2007-07-01 19
2007-10-01 18.1
2008-01-01 17.8
2008-04-01 17.6
2008-07-01 17.7
2008-10-01 16.8
2009-01-01 16.6
2009-04-01 17.2
2009-07-01 17.3
2009-10-01 16.8
2010-01-01 17.7
2010-04-01 17.6
2010-07-01 17.9
2010-10-01 17.3
2011-01-01 17.7
2011-04-01 18.3
2011-07-01 18.9
2011-10-01 17.9
2012-01-01 17.8
2012-04-01 18.0
2012-07-01 17.8
2012-10-01 17.3
2013-01-01 17.2
2013-04-01 17.5
2013-07-01 17.6
2013-10-01 17.4
2014-01-01 17.9
2014-04-01 18.1
2014-07-01 18.5
2014-10-01 17.7
2015-01-01 17.5
2015-04-01 17.9
2015-07-01 18.2
2015-10-01 17.8
2016-01-01 18.0
2016-04-01 17.8
2016-07-01 17.9
2016-10-01 17.6
2017-01-01 17.7
2017-04-01 17.9
2017-07-01 18.2
2017-10-01 18.1
2018-01-01 18.1
2018-04-01 17.8