Quarterly Percent
1999-01-01 11.8
2000-01-01 15.5
2000-04-01 14.8
2000-07-01 13.8
2000-10-01 14.4
2001-01-01 17.3
2001-04-01 17.3
2001-07-01 16.6
2001-10-01 17.6
2002-01-01 20
2002-04-01 19.6
2002-07-01 18.9
2002-10-01 19.4
2003-01-01 20.6
2003-04-01 19.2
2003-07-01 18.6
2003-10-01 18.7
2004-01-01 20.5
2004-04-01 18.8
2004-07-01 17.7
2004-10-01 17
2005-01-01 18.2
2005-04-01 17.4
2005-07-01 16.2
2005-10-01 15.6
2006-01-01 15.8
2006-04-01 13.6
2006-07-01 12.1
2006-10-01 11.1
2007-01-01 10.8
2007-04-01 9.3
2007-07-01 8.5
2007-10-01 7.8
2008-01-01 7.6
2008-04-01 6.6
2008-07-01 5.7
2008-10-01 6.1
2009-01-01 7.8
2009-04-01 7.6
2009-07-01 7.7
2009-10-01 8.3
2010-01-01 10.7
2010-04-01 9.4
2010-07-01 8.8
2010-10-01 9.0
2011-01-01 10.1
2011-04-01 9.1
2011-07-01 8.4
2011-10-01 9.0
2012-01-01 10.3
2012-04-01 9.3
2012-07-01 9.1
2012-10-01 9.5
2013-01-01 10.9
2013-04-01 9.9
2013-07-01 9.1
2013-10-01 9.3
2014-01-01 10.4
2014-04-01 8.8
2014-07-01 7.6
2014-10-01 7.7
2015-01-01 8.6
2015-04-01 7.5
2015-07-01 6.8
2015-10-01 6.9
2016-01-01 7.1
2016-04-01 6.4
2016-07-01 5.8
2016-10-01 5.5
2017-01-01 5.5
2017-04-01 5.3
2017-07-01 4.6
2017-10-01 4.5
2018-01-01 4.1
2018-04-01 3.8