Quarterly Percent
1999-01-01 21.3
2000-01-01 21.4
2001-01-01 21.6
2002-01-01 21.4
2003-01-01 19.6
2003-04-01 20.1
2003-07-01 20.5
2003-10-01 19.9
2004-01-01 19.5
2004-04-01 19.5
2004-07-01 20.0
2004-10-01 19.1
2005-01-01 18.8
2005-04-01 19.2
2005-07-01 19.5
2005-10-01 18.9
2006-01-01 18.8
2006-04-01 19.0
2006-07-01 18.9
2006-10-01 18.1
2007-01-01 18.2
2007-04-01 18.2
2007-07-01 18.2
2007-10-01 17.5
2008-01-01 17.2
2008-04-01 17.1
2008-07-01 17.6
2008-10-01 17.0
2009-01-01 17.1
2009-04-01 16.8
2009-07-01 17.2
2009-10-01 16.6
2010-01-01 16.4
2010-04-01 16.7
2010-07-01 17.0
2010-10-01 16.5
2011-01-01 16.6
2011-04-01 17.2
2011-07-01 17.5
2011-10-01 16.8
2012-01-01 16.9
2012-04-01 16.9
2012-07-01 17.4
2012-10-01 16.7
2013-01-01 16.9
2013-04-01 16.5
2013-07-01 16.8
2013-10-01 16.0
2014-01-01 16.6
2014-04-01 17.1
2014-07-01 17.5
2014-10-01 16.8
2015-01-01 17.4
2015-04-01 17.5
2015-07-01 17.5
2015-10-01 16.9
2016-01-01 16.8
2016-04-01 17.5
2016-07-01 17.5
2016-10-01 17.3
2017-01-01 17.8
2017-04-01 17.5
2017-07-01 17.6
2017-10-01 17.3
2018-01-01 17.0
2018-04-01 16.8
