Quarterly Percent
1998-04-01 21.3
1999-04-01 21.2
2000-04-01 22.8
2001-01-01 20.7
2001-04-01 19.8
2001-07-01 19
2001-10-01 20.8
2002-01-01 21.3
2002-04-01 20.2
2002-07-01 19.7
2002-10-01 21.3
2003-01-01 22.1
2003-04-01 20.2
2003-07-01 19.7
2003-10-01 21.4
2004-01-01 21.5
2004-04-01 20.2
2004-07-01 19.8
2004-10-01 21.9
2005-01-01 21.8
2005-04-01 18.1
2005-07-01 18.1
2005-10-01 19.9
2006-01-01 20
2006-04-01 18.1
2006-07-01 17.9
2006-10-01 19.4
2007-01-01 19.3
2007-04-01 18
2007-07-01 17.6
2007-10-01 19.5
2008-01-01 19.3
2008-04-01 17.3
2008-07-01 17.4
2008-10-01 19.3
2009-01-01 19.6
2009-04-01 17.5
2009-07-01 18
2009-10-01 19.4
2010-01-01 19.5
2010-04-01 17
2010-07-01 17.1
2010-10-01 18.8
2011-01-01 18.9
2011-04-01 16.4
2011-07-01 16.7
2011-10-01 18.3
2012-01-01 18.8
2012-04-01 16.5
2012-07-01 16.5
2012-10-01 17.8
2013-01-01 17.7
2013-04-01 15.8
2013-07-01 15.8
2013-10-01 17.3
2014-01-01 17.4
2014-04-01 15.5
2014-07-01 15.5
2014-10-01 17.1
2015-01-01 17.2
2015-04-01 15.6
2015-07-01 16.0
2015-10-01 17.1
2016-01-01 16.9
2016-04-01 15.1
2016-07-01 15.5
2016-10-01 16.9
2017-01-01 16.6
2017-04-01 14.8
2017-07-01 14.9
2017-10-01 16.5
2018-01-01 16.5
2018-04-01 14.8
