Quarterly Percent
1999-01-01 16.2
1999-04-01 16.3
1999-07-01 16.5
1999-10-01 17.3
2000-01-01 16
2000-04-01 15.3
2000-07-01 15.6
2000-10-01 16.3
2001-01-01 16
2001-04-01 15.8
2001-07-01 15
2001-10-01 14.5
2002-01-01 14.4
2002-04-01 14.3
2002-07-01 15
2002-10-01 16.7
2003-01-01 16.1
2003-04-01 15.4
2003-07-01 15.6
2003-10-01 15.5
2004-01-01 15
2004-04-01 13.6
2004-07-01 13
2004-10-01 13.7
2005-01-01 13.4
2005-04-01 13.5
2005-07-01 14.2
2005-10-01 13.2
2006-01-01 12.5
2006-04-01 12.1
2006-07-01 13.8
2006-10-01 13.7
2007-01-01 13.1
2007-04-01 12
2007-07-01 13.2
2007-10-01 12.5
2008-01-01 12.2
2008-04-01 11.6
2008-07-01 11.6
2008-10-01 10.5
2009-01-01 11.5
2009-04-01 12.4
2009-07-01 12.6
2009-10-01 11.8
2010-01-01 11.6
2010-04-01 11.3
2010-07-01 13.1
2010-10-01 11.6
2011-01-01 11.4
2011-04-01 11.4
2011-07-01 12.2
2011-10-01 11.5
2012-01-01 10.5
2012-04-01 11.3
2012-07-01 10.5
2012-10-01 11.4
2013-01-01 11.2
2013-04-01 11.7
2013-07-01 11.1
2013-10-01 11.3
2014-01-01 10.5
2014-04-01 11
2014-07-01 12.5
2014-10-01 12.9
2015-01-01 12.0
2015-04-01 11.1
2015-07-01 10.8
2015-10-01 11.8
2016-01-01 12.0
2016-04-01 10.9
2016-07-01 11.3
2016-10-01 10.2
2017-01-01 10.3
2017-04-01 10.2
2017-07-01 9.2
2017-10-01 9.2
2018-01-01 10.3
2018-04-01 10.6