Quarterly Percent
1999-01-01 34.2
2000-01-01 34.1
2000-04-01 33.9
2000-07-01 34.2
2000-10-01 34.7
2001-01-01 34.5
2001-04-01 34
2001-07-01 34.2
2001-10-01 35.2
2002-01-01 35.4
2002-04-01 35.1
2002-07-01 35.2
2002-10-01 35.9
2003-01-01 36.4
2003-04-01 36
2003-07-01 35.7
2003-10-01 36.1
2004-01-01 36
2004-04-01 36.3
2004-07-01 35.9
2004-10-01 35.9
2005-01-01 36.3
2005-04-01 36.1
2005-07-01 34.8
2005-10-01 35.4
2006-01-01 37.2
2006-04-01 37.1
2006-07-01 35.9
2006-10-01 36.4
2007-01-01 37.4
2007-04-01 37.1
2007-07-01 36.4
2007-10-01 36.4
2008-01-01 36.8
2008-04-01 36.5
2008-07-01 35.7
2008-10-01 35.7
2009-01-01 35.8
2009-04-01 35.6
2009-07-01 34.8
2009-10-01 35.1
2010-01-01 35.2
2010-04-01 34.7
2010-07-01 34.2
2010-10-01 34.6
2011-01-01 34.9
2011-04-01 34.4
2011-07-01 33.9
2011-10-01 33.9
2012-01-01 34.2
2012-04-01 33.6
2012-07-01 33.1
2012-10-01 33.2
2013-01-01 33.7
2013-04-01 33.2
2013-07-01 32.6
2013-10-01 32.6
2014-01-01 32.5
2014-04-01 32.4
2014-07-01 31.8
2014-10-01 31.8
2015-01-01 32.1
2015-04-01 32.4
2015-07-01 31.6
2015-10-01 31.5
2016-01-01 31.5
2016-04-01 31.4
2016-07-01 30.9
2016-10-01 31.0
2017-01-01 30.9
2017-04-01 30.3
2017-07-01 30.1
2017-10-01 30.5
2018-01-01 30.5
2018-04-01 29.8