Quarterly Percent
1999-01-01 23.4
1999-04-01 23
1999-07-01 22.6
1999-10-01 22.7
2000-01-01 23.2
2000-04-01 22.7
2000-07-01 22.4
2000-10-01 22.4
2001-01-01 22.9
2001-04-01 22.9
2001-07-01 22.7
2001-10-01 23.2
2002-01-01 23.3
2002-04-01 23
2002-07-01 22.7
2002-10-01 23
2003-01-01 23.1
2003-04-01 22.1
2003-07-01 21.7
2003-10-01 21.8
2004-01-01 22.4
2004-04-01 22.2
2004-07-01 22
2004-10-01 22
2005-01-01 22.1
2005-04-01 21.4
2005-07-01 20.7
2005-10-01 20.9
2006-01-01 20.7
2006-04-01 20
2006-07-01 19.9
2006-10-01 19.7
2007-01-01 20.3
2007-04-01 19.9
2007-07-01 19.6
2007-10-01 19.6
2008-01-01 20.2
2008-04-01 19.8
2008-07-01 19.2
2008-10-01 19.6
2009-01-01 20
2009-04-01 19.7
2009-07-01 19.6
2009-10-01 19.6
2010-01-01 19.4
2010-04-01 19
2010-07-01 18.8
2010-10-01 19.3
2011-01-01 19.7
2011-04-01 18.7
2011-07-01 18.4
2011-10-01 18.2
2012-01-01 17.9
2012-04-01 17.2
2012-07-01 16.6
2012-10-01 16.8
2013-01-01 17.6
2013-04-01 16.6
2013-07-01 16.3
2013-10-01 16.3
2014-01-01 15.5
2014-04-01 15.1
2014-07-01 14.6
2014-10-01 14.8
2015-01-01 14.6
2015-04-01 14.2
2015-07-01 13.9
2015-10-01 14.1
2016-01-01 14.4
2016-04-01 13.8
2016-07-01 13.6
2016-10-01 13.7
2017-01-01 13.8
2017-04-01 13.1
2017-07-01 12.8
2017-10-01 13.0
2018-01-01 13.0
2018-04-01 12.6
