Quarterly Percent
1999-04-01 13.6
2000-04-01 11.8
2001-04-01 11.4
2002-04-01 10.6
2003-04-01 12.4
2004-04-01 12.9
2005-01-01 12.3
2005-04-01 13.1
2005-07-01 12.5
2005-10-01 12.2
2006-01-01 13.4
2006-04-01 11.5
2006-07-01 11
2006-10-01 11.8
2007-01-01 10.9
2007-04-01 9.8
2007-07-01 8.9
2007-10-01 9.1
2008-01-01 9.2
2008-04-01 8.3
2008-07-01 7.4
2008-10-01 7.6
2009-01-01 8.8
2009-04-01 7.5
2009-07-01 7.9
2009-10-01 7.7
2010-01-01 8.5
2010-04-01 8.3
2010-07-01 7.5
2010-10-01 7.4
2011-01-01 7.8
2011-04-01 6.7
2011-07-01 6.0
2011-10-01 5.5
2012-01-01 7.0
2012-04-01 6.1
2012-07-01 6.0
2012-10-01 5.6
2013-01-01 6.8
2013-04-01 6.1
2013-07-01 5.6
2013-10-01 5.9
2014-01-01 6.2
2014-04-01 5.6
2014-07-01 4.9
2014-10-01 5.4
2015-01-01 6.0
2015-04-01 5.5
2015-07-01 4.6
2015-10-01 4.9
2016-01-01 4.4
2016-04-01 4.1
2016-07-01 4.0
2016-10-01 4.0
2017-01-01 4.0
2017-04-01 3.6
2017-07-01 3.5
2017-10-01 3.5
2018-01-01 3.7
2018-04-01 3.2