Quarterly Percent
1998-04-01 16.8
1999-04-01 15.4
2000-04-01 8.1
2001-01-01 13.1
2001-04-01 10.6
2001-07-01 8.8
2001-10-01 11
2002-01-01 13.3
2002-04-01 12.4
2002-07-01 10.1
2002-10-01 11.6
2003-01-01 13.4
2003-04-01 13.1
2003-07-01 11.3
2003-10-01 13.5
2004-01-01 16.4
2004-04-01 17.2
2004-07-01 14.5
2004-10-01 16.3
2005-01-01 20
2005-04-01 27.8
2005-07-01 17.9
2005-10-01 20.7
2006-01-01 25.9
2006-04-01 27.5
2006-07-01 16.5
2006-10-01 18.6
2007-01-01 21.1
2007-04-01 24.7
2007-07-01 14.9
2007-10-01 18.5
2008-01-01 21.5
2008-04-01 25.6
2008-07-01 16.4
2008-10-01 19
2009-01-01 23.8
2009-04-01 28.2
2009-07-01 20.5
2009-10-01 22
2010-01-01 27.5
2010-04-01 27.9
2010-07-01 19.2
2010-10-01 19.8
2011-01-01 25.3
2011-04-01 27.3
2011-07-01 17.3
2011-10-01 19.1
2012-01-01 23.8
2012-04-01 26.1
2012-07-01 18.3
2012-10-01 20.6
2013-01-01 25.4
2013-04-01 26.3
2013-07-01 18.5
2013-10-01 18.8
2014-01-01 24.9
2014-04-01 25.6
2014-07-01 16.7
2014-10-01 18.7
2015-01-01 23.6
2015-04-01 24.5
2015-07-01 14.1
2015-10-01 15.8
2016-01-01 19.5
2016-04-01 21.1
2016-07-01 13.1
2016-10-01 15.1
2017-01-01 18.9
2017-04-01 20.8
2017-07-01 14.0
2017-10-01 14.1
2018-01-01 17.0
2018-04-01 18.3