Quarterly Percent
1998-01-01 16.5
1998-04-01 16.7
1998-07-01 15.9
1998-10-01 16.6
1999-01-01 16.4
1999-04-01 16.4
1999-07-01 15.3
1999-10-01 15.3
2000-01-01 15.4
2000-04-01 14.9
2000-07-01 14.1
2000-10-01 13.9
2001-01-01 13.8
2001-04-01 13.1
2001-07-01 12.6
2001-10-01 12.7
2002-01-01 12.5
2002-04-01 12.7
2002-07-01 11.8
2002-10-01 12.2
2003-01-01 12
2003-04-01 12
2003-07-01 11.3
2003-10-01 11.5
2004-01-01 11.5
2004-04-01 10.3
2004-07-01 9.8
2004-10-01 10.6
2005-01-01 10.5
2005-04-01 9.7
2005-07-01 9.5
2005-10-01 10.7
2006-01-01 9.9
2006-04-01 8.5
2006-07-01 8.0
2006-10-01 8.9
2007-01-01 8.0
2007-04-01 7.4
2007-07-01 7.5
2007-10-01 8.6
2008-01-01 9.0
2008-04-01 8.7
2008-07-01 7.9
2008-10-01 8.6
2009-01-01 9.5
2009-04-01 8.8
2009-07-01 8.6
2009-10-01 10.2
2010-01-01 10.5
2010-04-01 9.5
2010-07-01 8.7
2010-10-01 10
2011-01-01 9.6
2011-04-01 9.0
2011-07-01 9.0
2011-10-01 10.8
2012-01-01 12.2
2012-04-01 11.5
2012-07-01 11.1
2012-10-01 12.9
2013-01-01 13.9
2013-04-01 12.8
2013-07-01 12.1
2013-10-01 13.8
2014-01-01 14.5
2014-04-01 13.4
2014-07-01 12.9
2014-10-01 14.9
2015-01-01 13.9
2015-04-01 13.0
2015-07-01 11.5
2015-10-01 12.9
2016-01-01 13.0
2016-04-01 12.9
2016-07-01 12.1
2016-10-01 13.6
2017-01-01 13.5
2017-04-01 12.2
2017-07-01 12.0
2017-10-01 12.5
2018-01-01 13.0
2018-04-01 11.9