Quarterly Percent
1998-01-01 9.7
1998-04-01 9.0
1998-07-01 8.7
1998-10-01 9.4
1999-01-01 10.3
1999-04-01 9.9
1999-07-01 9.9
1999-10-01 10.8
2000-01-01 10.7
2000-04-01 9.7
2000-07-01 9.3
2000-10-01 9.4
2001-01-01 9.8
2001-04-01 8.9
2001-07-01 8.8
2001-10-01 9.8
2002-01-01 10
2002-04-01 8.8
2002-07-01 8.7
2002-10-01 9.1
2003-01-01 9.4
2003-04-01 8.4
2003-07-01 8.3
2003-10-01 9.0
2004-01-01 10.1
2004-04-01 9.2
2004-07-01 9.3
2004-10-01 9.5
2005-01-01 9.7
2005-04-01 9.0
2005-07-01 9.0
2005-10-01 9.0
2006-01-01 9.0
2006-04-01 8.1
2006-07-01 7.7
2006-10-01 8.0
2007-01-01 8.5
2007-04-01 7.7
2007-07-01 7.4
2007-10-01 7.7
2008-01-01 7.9
2008-04-01 6.8
2008-07-01 6.7
2008-10-01 7.5
2009-01-01 8.9
2009-04-01 8.5
2009-07-01 8.9
2009-10-01 9.9
2010-01-01 11.3
2010-04-01 11.4
2010-07-01 12
2010-10-01 13.8
2011-01-01 15.6
2011-04-01 15.8
2011-07-01 17.2
2011-10-01 20.3
2012-01-01 22.2
2012-04-01 23.1
2012-07-01 24.2
2012-10-01 25.5
2013-01-01 26.8
2013-04-01 26.7
2013-07-01 26.8
2013-10-01 27.3
2014-01-01 27.2
2014-04-01 26.1
2014-07-01 25.2
2014-10-01 25.6
2015-01-01 26.2
2015-04-01 24.1
2015-07-01 23.6
2015-10-01 23.9
2016-01-01 24.2
2016-04-01 22.1
2016-07-01 22.0
2016-10-01 22.9
2017-01-01 22.6
2017-04-01 20.3
2017-07-01 19.4
2017-10-01 20.6
2018-01-01 20.7
2018-04-01 18.5