Quarterly Percent
1999-01-01 13.4
1999-04-01 12.3
1999-07-01 13.7
1999-10-01 11.7
2000-01-01 12.4
2000-04-01 12.3
2000-07-01 13
2000-10-01 12.2
2001-01-01 11.7
2001-04-01 10.7
2001-07-01 11.5
2001-10-01 11.3
2002-01-01 11.8
2002-04-01 11.4
2002-07-01 14.2
2002-10-01 13.2
2003-01-01 14.4
2003-04-01 12.9
2003-07-01 13.5
2003-10-01 12.6
2004-01-01 14.1
2004-04-01 14.4
2004-07-01 16.6
2004-10-01 16.8
2005-01-01 18.8
2005-04-01 19.2
2005-07-01 20.5
2005-10-01 19.1
2006-01-01 18.9
2006-04-01 17.4
2006-07-01 20.5
2006-10-01 19.7
2007-01-01 18.5
2007-04-01 16.2
2007-07-01 18.3
2007-10-01 19
2008-01-01 19.6
2008-04-01 18.6
2008-07-01 20.4
2008-10-01 19.4
2009-01-01 25
2009-04-01 25.1
2009-07-01 27.5
2009-10-01 27.9
2010-01-01 27.5
2010-04-01 26.6
2010-07-01 26.5
2010-10-01 25.1
2011-01-01 26.7
2011-04-01 24.1
2011-07-01 26.3
2011-10-01 26.7
2012-01-01 28.4
2012-04-01 28.2
2012-07-01 29.1
2012-10-01 27.2
2013-01-01 29.8
2013-04-01 25.7
2013-07-01 26.8
2013-10-01 24.1
2014-01-01 21
2014-04-01 20.7
2014-07-01 21.6
2014-10-01 18.3
2015-01-01 19.4
2015-04-01 17.8
2015-07-01 16.7
2015-10-01 15.3
2016-01-01 14.2
2016-04-01 13.3
2016-07-01 12.7
2016-10-01 11.6
2017-01-01 10.3
2017-04-01 11.0
2017-07-01 11.3
2017-10-01 10.2
2018-01-01 10.4
2018-04-01 9.5