Quarterly Percent
1999-01-01 15.1
1999-04-01 13.5
1999-07-01 14.6
1999-10-01 12.3
2000-01-01 14.2
2000-04-01 13.7
2000-07-01 13.6
2000-10-01 13.1
2001-01-01 13
2001-04-01 11.6
2001-07-01 11.8
2001-10-01 12.6
2002-01-01 13.2
2002-04-01 12.3
2002-07-01 14
2002-10-01 13.5
2003-01-01 15.6
2003-04-01 13.5
2003-07-01 13.2
2003-10-01 12.6
2004-01-01 15.5
2004-04-01 14.6
2004-07-01 17.2
2004-10-01 17.6
2005-01-01 20.2
2005-04-01 20.2
2005-07-01 19.2
2005-10-01 18.9
2006-01-01 19.4
2006-04-01 16.5
2006-07-01 19.7
2006-10-01 18.9
2007-01-01 18.7
2007-04-01 15.5
2007-07-01 16.7
2007-10-01 18.7
2008-01-01 19.5
2008-04-01 17.2
2008-07-01 19.2
2008-10-01 19.5
2009-01-01 25.7
2009-04-01 26.5
2009-07-01 29.4
2009-10-01 29.7
2010-01-01 30.2
2010-04-01 28.6
2010-07-01 26.9
2010-10-01 25.3
2011-01-01 28.9
2011-04-01 25
2011-07-01 27.4
2011-10-01 26.6
2012-01-01 29.8
2012-04-01 30.1
2012-07-01 29.8
2012-10-01 26.9
2013-01-01 29.5
2013-04-01 24.4
2013-07-01 26
2013-10-01 22.7
2014-01-01 19.4
2014-04-01 20
2014-07-01 20.8
2014-10-01 19.7
2015-01-01 20.6
2015-04-01 19.1
2015-07-01 17.5
2015-10-01 16.1
2016-01-01 15.3
2016-04-01 13.0
2016-07-01 12.3
2016-10-01 11.3
2017-01-01 11.0
2017-04-01 10.8
2017-07-01 8.5
2017-10-01 8.6
2018-01-01 9.4
2018-04-01 8.5