Quarterly Percent
1998-01-01 14.5
1998-04-01 14
1998-07-01 13.8
1998-10-01 14.6
1999-01-01 15.6
1999-04-01 15.5
1999-07-01 15.3
1999-10-01 16.2
2000-01-01 16.4
2000-04-01 15
2000-07-01 14.5
2000-10-01 14.5
2001-01-01 15.1
2001-04-01 14
2001-07-01 13.7
2001-10-01 15
2002-01-01 15.1
2002-04-01 13.7
2002-07-01 13.6
2002-10-01 14
2003-01-01 14.3
2003-04-01 12.9
2003-07-01 13.1
2003-10-01 14.1
2004-01-01 15.5
2004-04-01 14.4
2004-07-01 14.6
2004-10-01 14.8
2005-01-01 15.1
2005-04-01 14.2
2005-07-01 14.1
2005-10-01 13.9
2006-01-01 13.5
2006-04-01 12.4
2006-07-01 11.9
2006-10-01 12.4
2007-01-01 13.2
2007-04-01 11.9
2007-07-01 11.3
2007-10-01 11.7
2008-01-01 11.7
2008-04-01 10.4
2008-07-01 10.3
2008-10-01 11.1
2009-01-01 12.3
2009-04-01 11.8
2009-07-01 12.3
2009-10-01 13.2
2010-01-01 14.9
2010-04-01 14.5
2010-07-01 15.4
2010-10-01 17.4
2011-01-01 18.9
2011-04-01 19.1
2011-07-01 20.7
2011-10-01 23.8
2012-01-01 25.6
2012-04-01 26.3
2012-07-01 27.8
2012-10-01 28.9
2013-01-01 30.3
2013-04-01 30.6
2013-07-01 31.1
2013-10-01 31.4
2014-01-01 30.9
2014-04-01 29.9
2014-07-01 29
2014-10-01 29.3
2015-01-01 30.4
2015-04-01 28.2
2015-07-01 28.0
2015-10-01 28.2
2016-01-01 29.5
2016-04-01 27.3
2016-07-01 27.3
2016-10-01 28.1
2017-01-01 27.5
2017-04-01 24.9
2017-07-01 24.5
2017-10-01 25.6
2018-01-01 25.9
2018-04-01 23.5