Quarterly Percent
1998-01-01 24.5
1999-01-01 23.7
1999-04-01 24.5
1999-07-01 25
1999-10-01 25.1
2000-01-01 23.2
2000-04-01 23.8
2000-07-01 23.5
2000-10-01 23.4
2001-01-01 23.1
2001-04-01 22.8
2001-07-01 22.9
2001-10-01 22.6
2002-01-01 20.9
2002-04-01 21
2002-07-01 21
2002-10-01 20.9
2003-01-01 20.3
2003-04-01 19.9
2003-07-01 19.6
2003-10-01 20.4
2004-01-01 21.4
2004-04-01 21.3
2004-07-01 20.6
2004-10-01 21.3
2005-01-01 20.8
2005-04-01 20.7
2005-07-01 20.1
2005-10-01 20.8
2006-01-01 20.3
2006-04-01 19.8
2006-07-01 19.4
2006-10-01 20.2
2007-01-01 20
2007-04-01 19.6
2007-07-01 18.7
2007-10-01 19.7
2008-01-01 19.5
2008-04-01 18.9
2008-07-01 19
2008-10-01 18.9
2009-01-01 18.2
2009-04-01 17.8
2009-07-01 17.5
2009-10-01 18.3
2010-01-01 18
2010-04-01 17.8
2010-07-01 17.7
2010-10-01 17.1
2011-01-01 17.2
2011-04-01 17.1
2011-07-01 16.8
2011-10-01 16
2012-01-01 16
2012-04-01 15.9
2012-07-01 15.7
2012-10-01 16.4
2013-01-01 15.5
2013-04-01 15.6
2013-07-01 15.1
2013-10-01 15.7
2014-01-01 15
2014-04-01 15.2
2014-07-01 15.6
2014-10-01 16
2015-01-01 15.9
2015-04-01 15.8
2015-07-01 15.6
2015-10-01 15.2
2016-01-01 15.3
2016-04-01 15.1
2016-07-01 14.9
2016-10-01 15.1
2017-01-01 15.1
2017-04-01 15.0
2017-07-01 15.0
2017-10-01 14.7
2018-01-01 15.2
2018-04-01 15.2
