Quarterly Percent
1999-04-01 37.1
1999-07-01 37.2
1999-10-01 36.4
2000-01-01 36
2000-04-01 35.1
2000-07-01 35.4
2000-10-01 34.8
2001-01-01 34.7
2001-04-01 34
2001-07-01 33.7
2001-10-01 33.4
2002-01-01 32.9
2002-04-01 32.4
2002-07-01 33.5
2002-10-01 33.4
2003-01-01 33
2003-04-01 32.8
2003-07-01 33
2003-10-01 32.5
2004-01-01 32.4
2004-04-01 32
2004-07-01 32.2
2004-10-01 31.5
2005-01-01 30.8
2005-04-01 30.4
2005-07-01 30.3
2005-10-01 30.1
2006-01-01 29.7
2006-04-01 29.8
2006-07-01 29.5
2006-10-01 29.1
2007-01-01 27.8
2007-04-01 27.5
2007-07-01 27.5
2007-10-01 27.8
2008-01-01 27.4
2008-04-01 27.8
2008-07-01 27.6
2008-10-01 27.3
2009-01-01 27.9
2009-04-01 27.5
2009-07-01 26.8
2009-10-01 27.5
2010-01-01 27.4
2010-04-01 27.1
2010-07-01 27.6
2010-10-01 27.7
2011-01-01 28.0
2011-04-01 27.1
2011-07-01 27.1
2011-10-01 27.1
2012-01-01 27.0
2012-04-01 27.2
2012-07-01 27.1
2012-10-01 26.9
2013-01-01 26.5
2013-04-01 25.7
2013-07-01 25.9
2013-10-01 25.8
2014-01-01 25.7
2014-04-01 25.9
2014-07-01 25.6
2014-10-01 25.8
2015-01-01 26.0
2015-04-01 25.2
2015-07-01 25.8
2015-10-01 25.0
2016-01-01 25.4
2016-04-01 25.1
2016-07-01 25.1
2016-10-01 25.4
2017-01-01 24.9
2017-04-01 25.3
2017-07-01 23.4
2017-10-01 23.3
2018-01-01 23.7
2018-04-01 23.1