Quarterly Percent
1999-01-01 17.5
1999-04-01 19.8
1999-07-01 16.6
1999-10-01 18.5
2000-01-01 21.4
2000-04-01 18.5
2000-07-01 16.3
2000-10-01 18.4
2001-01-01 19.1
2001-04-01 16.6
2001-07-01 20.5
2001-10-01 25.4
2002-01-01 19.3
2002-04-01 16.7
2002-07-01 19
2002-10-01 19.2
2003-01-01 21.4
2003-04-01 18.4
2003-07-01 19
2003-10-01 20.3
2004-01-01 22
2004-04-01 17.7
2004-07-01 16.3
2004-10-01 21.1
2005-01-01 21.3
2005-04-01 15.5
2005-07-01 16
2005-10-01 18.1
2006-01-01 24
2006-04-01 15.7
2006-07-01 14.8
2006-10-01 12.8
2007-01-01 13.4
2007-04-01 8.8
2007-07-01 9.5
2007-10-01 13.4
2008-01-01 13.5
2008-04-01 11.3
2008-07-01 9.3
2008-10-01 11.6
2009-01-01 13.7
2009-04-01 14.4
2009-07-01 12.4
2009-10-01 13.2
2010-01-01 11.7
2010-04-01 14.6
2010-07-01 12.9
2010-10-01 16.2
2011-01-01 20.2
2011-04-01 14.3
2011-07-01 14.2
2011-10-01 18.4
2012-01-01 21.3
2012-04-01 17.8
2012-07-01 20.9
2012-10-01 23.6
2013-01-01 25.5
2013-04-01 28.8
2013-07-01 18.8
2013-10-01 22.1
2014-01-01 23.4
2014-04-01 20.8
2014-07-01 20.1
2014-10-01 21.1
2015-01-01 20.9
2015-04-01 11.8
2015-07-01 12.6
2015-10-01 14.0
2016-01-01 14.9
2016-04-01 13.5
2016-07-01 13.9
2016-10-01 16.7
2017-01-01 10.5
2017-04-01 10.8
2017-07-01 16.5
2017-10-01 13.5
2018-01-01 12.9
2018-04-01 9.4