Quarterly Percent
1998-04-01 29.5
1999-01-01 27.4
1999-04-01 27.1
1999-07-01 27.8
1999-10-01 28.3
2000-01-01 27.6
2000-04-01 26.8
2000-07-01 26.8
2000-10-01 27.7
2001-01-01 28.3
2001-04-01 29.3
2001-07-01 29.9
2001-10-01 27.9
2002-01-01 27.8
2002-04-01 28
2002-07-01 27.1
2002-10-01 27.4
2003-01-01 26.9
2003-04-01 26.9
2003-07-01 26.8
2003-10-01 25.1
2004-01-01 26.1
2004-04-01 25.7
2004-07-01 25.2
2004-10-01 24.1
2005-01-01 23.1
2005-04-01 23.2
2005-07-01 22.9
2005-10-01 23.6
2006-01-01 23.8
2006-04-01 23
2006-07-01 22.9
2006-10-01 22.5
2007-01-01 22.2
2007-04-01 22.5
2007-07-01 22.3
2007-10-01 20.7
2008-01-01 20.6
2008-04-01 21.3
2008-07-01 20.8
2008-10-01 21.3
2009-01-01 19.5
2009-04-01 21.4
2009-07-01 21.3
2009-10-01 20.8
2010-01-01 19
2010-04-01 20.6
2010-07-01 20.3
2010-10-01 18.4
2011-01-01 22.2
2011-04-01 21.1
2011-07-01 20.8
2011-10-01 21
2012-01-01 21.4
2012-04-01 21.5
2012-07-01 20.6
2012-10-01 20
2013-01-01 20.6
2013-04-01 20.4
2013-07-01 19.4
2013-10-01 20.6
2014-01-01 19.5
2014-04-01 19.9
2014-07-01 19.1
2014-10-01 19.3
2015-01-01 19.0
2015-04-01 20.8
2015-07-01 19.9
2015-10-01 19.5
2016-01-01 20.5
2016-04-01 20.6
2016-07-01 20.5
2016-10-01 19.0
2017-01-01 20.3
2017-04-01 20.1
2017-07-01 21.1
2017-10-01 20.1
2018-01-01 20.2
2018-04-01 20.3