Quarterly Percent
1999-01-01 12.6
2000-01-01 17
2000-04-01 16.6
2000-07-01 15.7
2000-10-01 16.2
2001-01-01 18.6
2001-04-01 18.7
2001-07-01 18.2
2001-10-01 18.8
2002-01-01 20.6
2002-04-01 20.2
2002-07-01 20.2
2002-10-01 20.1
2003-01-01 20.8
2003-04-01 19.7
2003-07-01 19.7
2003-10-01 19.6
2004-01-01 21
2004-04-01 19.4
2004-07-01 18.5
2004-10-01 18.3
2005-01-01 19.1
2005-04-01 18.3
2005-07-01 17.6
2005-10-01 17
2006-01-01 16.3
2006-04-01 14.3
2006-07-01 13.2
2006-10-01 12.4
2007-01-01 11.4
2007-04-01 9.7
2007-07-01 9.1
2007-10-01 8.6
2008-01-01 8.2
2008-04-01 7.2
2008-07-01 6.7
2008-10-01 6.8
2009-01-01 8.4
2009-04-01 8.0
2009-07-01 8.2
2009-10-01 8.6
2010-01-01 10.7
2010-04-01 9.6
2010-07-01 9.2
2010-10-01 9.4
2011-01-01 10.2
2011-04-01 9.6
2011-07-01 9.4
2011-10-01 9.9
2012-01-01 10.6
2012-04-01 10
2012-07-01 10
2012-10-01 10.2
2013-01-01 11.4
2013-04-01 10.6
2013-07-01 9.9
2013-10-01 9.9
2014-01-01 10.7
2014-04-01 9.2
2014-07-01 8.3
2014-10-01 8.2
2015-01-01 8.7
2015-04-01 7.5
2015-07-01 7.1
2015-10-01 7.0
2016-01-01 7.1
2016-04-01 6.3
2016-07-01 6.0
2016-10-01 5.6
2017-01-01 5.5
2017-04-01 5.0
2017-07-01 4.8
2017-10-01 4.5
2018-01-01 4.2
2018-04-01 3.6