Quarterly Percent
1999-01-01 48.2
1999-04-01 48
1999-07-01 47.3
1999-10-01 47.3
2000-01-01 47.6
2000-04-01 47.5
2000-07-01 47.1
2000-10-01 46.9
2001-01-01 47.6
2001-04-01 47.9
2001-07-01 47.3
2001-10-01 47.7
2002-01-01 47.7
2002-04-01 47.5
2002-07-01 47
2002-10-01 46.9
2003-01-01 46.6
2003-04-01 46.2
2003-07-01 45.8
2003-10-01 45.7
2004-01-01 46.2
2004-04-01 46.4
2004-07-01 46
2004-10-01 45.5
2005-01-01 45.4
2005-04-01 45
2005-07-01 44.6
2005-10-01 44.7
2006-01-01 44.6
2006-04-01 44.7
2006-07-01 44.3
2006-10-01 44.4
2007-01-01 45.1
2007-04-01 45.3
2007-07-01 44.9
2007-10-01 44.9
2008-01-01 45.6
2008-04-01 45.8
2008-07-01 44.9
2008-10-01 44.8
2009-01-01 45.4
2009-04-01 45.3
2009-07-01 44.9
2009-10-01 44.5
2010-01-01 44.1
2010-04-01 43.9
2010-07-01 43.3
2010-10-01 43.7
2011-01-01 44
2011-04-01 43.5
2011-07-01 43.2
2011-10-01 43
2012-01-01 42.9
2012-04-01 42.1
2012-07-01 41.2
2012-10-01 41.6
2013-01-01 42.2
2013-04-01 41.6
2013-07-01 41.1
2013-10-01 40.8
2014-01-01 40
2014-04-01 39.5
2014-07-01 38.8
2014-10-01 38.8
2015-01-01 38.4
2015-04-01 38.0
2015-07-01 37.3
2015-10-01 37.5
2016-01-01 37.4
2016-04-01 36.8
2016-07-01 36.0
2016-10-01 35.9
2017-01-01 36.4
2017-04-01 35.9
2017-07-01 35.3
2017-10-01 35.4
2018-01-01 35.6
2018-04-01 35.1