Quarterly Percent
1999-01-01 24.2
1999-04-01 22.9
1999-07-01 23
1999-10-01 22.5
2000-01-01 21.7
2000-04-01 20.4
2000-07-01 20.4
2000-10-01 19.8
2001-01-01 15.7
2001-04-01 15.1
2001-07-01 15
2001-10-01 15.3
2002-01-01 16.4
2002-04-01 16.1
2002-07-01 16.3
2002-10-01 16.1
2003-01-01 16.8
2003-04-01 15.7
2003-07-01 15.6
2003-10-01 15.5
2004-01-01 15.6
2004-04-01 15.1
2004-07-01 14.4
2004-10-01 14.4
2005-01-01 13.5
2005-04-01 12
2005-07-01 11.1
2005-10-01 11.5
2006-01-01 12.1
2006-04-01 11.3
2006-07-01 11
2006-10-01 11.2
2007-01-01 11.3
2007-04-01 10.4
2007-07-01 10.4
2007-10-01 10.9
2008-01-01 11.9
2008-04-01 12.1
2008-07-01 12.5
2008-10-01 14.9
2009-01-01 17.8
2009-04-01 18.1
2009-07-01 18
2009-10-01 18.9
2010-01-01 20
2010-04-01 20.4
2010-07-01 20.3
2010-10-01 20.6
2011-01-01 21.8
2011-04-01 21
2011-07-01 21.9
2011-10-01 23
2012-01-01 24.6
2012-04-01 24.5
2012-07-01 25.2
2012-10-01 26.4
2013-01-01 27.4
2013-04-01 26.9
2013-07-01 26.3
2013-10-01 26.6
2014-01-01 26.7
2014-04-01 25.5
2014-07-01 25.1
2014-10-01 24.9
2015-01-01 25.1
2015-04-01 24.1
2015-07-01 22.8
2015-10-01 22.6
2016-01-01 22.9
2016-04-01 22.0
2016-07-01 20.8
2016-10-01 20.4
2017-01-01 20.6
2017-04-01 19.2
2017-07-01 18.3
2017-10-01 18.4
2018-01-01 18.7
2018-04-01 17.2
2018-07-01 16.3