Quarterly Percent
1999-04-01 35.6
2000-01-01 35.4
2000-04-01 34.3
2000-07-01 33.4
2000-10-01 33
2001-01-01 33.2
2001-04-01 33.1
2001-07-01 32.8
2001-10-01 32.4
2002-01-01 32.2
2002-04-01 32.1
2002-07-01 31.3
2002-10-01 31.1
2003-01-01 31.2
2003-04-01 31.4
2003-07-01 31.1
2003-10-01 31.5
2004-01-01 31.1
2004-04-01 30.8
2004-07-01 30.8
2004-10-01 30.6
2005-01-01 30.4
2005-04-01 30.1
2005-07-01 30
2005-10-01 29.6
2006-01-01 29.5
2006-04-01 29.5
2006-07-01 29.3
2006-10-01 28.8
2007-01-01 28.5
2007-04-01 27.8
2007-07-01 27.4
2007-10-01 27.3
2008-01-01 27.3
2008-04-01 26.8
2008-07-01 26.5
2008-10-01 26.1
2009-01-01 25.7
2009-04-01 26.2
2009-07-01 26
2009-10-01 25.9
2010-01-01 27.6
2010-04-01 27.4
2010-07-01 27.4
2010-10-01 27.1
2011-01-01 27.5
2011-04-01 27.5
2011-07-01 27.2
2011-10-01 26.3
2012-01-01 26.4
2012-04-01 26.2
2012-07-01 25.8
2012-10-01 25.5
2013-01-01 25.7
2013-04-01 25.6
2013-07-01 25.4
2013-10-01 25.6
2014-01-01 26.3
2014-04-01 26.4
2014-07-01 26.2
2014-10-01 25.7
2015-01-01 25.5
2015-04-01 25.2
2015-07-01 25.3
2015-10-01 25.3
2016-01-01 25.5
2016-04-01 24.9
2016-07-01 24.8
2016-10-01 24.9
2017-01-01 25.0
2017-04-01 24.7
2017-07-01 24.6
2017-10-01 24.8
2018-01-01 24.9
2018-04-01 24.4