Quarterly Percent
1999-01-01 39.8
1999-04-01 38.8
1999-07-01 38.9
1999-10-01 39.5
2000-01-01 39.8
2000-04-01 39.3
2000-07-01 37.9
2000-10-01 39
2001-01-01 38.8
2001-04-01 38.9
2001-07-01 37.5
2001-10-01 38.7
2002-01-01 37.9
2002-04-01 38.2
2002-07-01 39.1
2002-10-01 40.2
2003-01-01 40.1
2003-04-01 39.7
2003-07-01 39.9
2003-10-01 38.9
2004-01-01 38.2
2004-04-01 37.1
2004-07-01 36
2004-10-01 37.4
2005-01-01 37
2005-04-01 37.2
2005-07-01 35.9
2005-10-01 35.8
2006-01-01 36.5
2006-04-01 35.7
2006-07-01 35.9
2006-10-01 36.9
2007-01-01 36.9
2007-04-01 35.2
2007-07-01 35
2007-10-01 36.2
2008-01-01 36.6
2008-04-01 35.9
2008-07-01 34.5
2008-10-01 35.8
2009-01-01 37
2009-04-01 35.7
2009-07-01 34.6
2009-10-01 35.3
2010-01-01 35.8
2010-04-01 35.7
2010-07-01 35.8
2010-10-01 35.5
2011-01-01 37.5
2011-04-01 37
2011-07-01 36.4
2011-10-01 36.6
2012-01-01 37
2012-04-01 37.8
2012-07-01 36.7
2012-10-01 36.6
2013-01-01 37.8
2013-04-01 37
2013-07-01 36.3
2013-10-01 37.3
2014-01-01 37.1
2014-04-01 36
2014-07-01 36.4
2014-10-01 36.8
2015-01-01 37.5
2015-04-01 36.3
2015-07-01 35.6
2015-10-01 37.3
2016-01-01 38.2
2016-04-01 37.1
2016-07-01 37.1
2016-10-01 36.5
2017-01-01 36.0
2017-04-01 35.6
2017-07-01 34.3
2017-10-01 34.6
2018-01-01 35.0
2018-04-01 34.2
