Quarterly Percent
1998-04-01 13.7
1998-10-01 13.9
1999-04-01 13.6
1999-10-01 13.3
2000-04-01 13.6
2000-10-01 13.2
2001-04-01 12.8
2001-10-01 12.9
2002-01-01 12.7
2002-04-01 12.8
2002-07-01 10.7
2002-10-01 10.8
2003-01-01 12.0
2003-04-01 12.1
2003-07-01 11.6
2003-10-01 11.7
2004-01-01 12.6
2004-04-01 12.7
2004-07-01 11.4
2004-10-01 12.3
2005-01-01 12.6
2005-04-01 10.0
2005-07-01 9.4
2005-10-01 8.5
2006-01-01 8.8
2006-04-01 6.7
2006-07-01 5.7
2006-10-01 6.6
2007-01-01 6.2
2007-04-01 6.0
2007-07-01 5.5
2007-10-01 5.0
2008-01-01 6.2
2008-04-01 6.9
2008-07-01 7.2
2008-10-01 8.9
2009-01-01 11.5
2009-04-01 14.3
2009-07-01 15.9
2009-10-01 16.7
2010-01-01 16.0
2010-04-01 17.5
2010-07-01 16.5
2010-10-01 16.5
2011-01-01 15.4
2011-04-01 14.4
2011-07-01 13.3
2011-10-01 13.2
2012-01-01 15.3
2012-04-01 15.5
2012-07-01 13.6
2012-10-01 12.5
2013-01-01 11.7
2013-04-01 11.0
2013-07-01 11.8
2013-10-01 11.0
2014-01-01 10.3
2014-04-01 9.3
2014-07-01 10.4
2014-10-01 10.4
2015-01-01 9.7
2015-04-01 8.2
2015-07-01 8.5
2015-10-01 8.7
2016-01-01 9.7
2016-04-01 8.6
2016-07-01 8.1
2016-10-01 8.1
2017-01-01 8.5
2017-04-01 7.5
2017-07-01 8.2
2017-10-01 7.5
2018-01-01 7.6
2018-04-01 6.4