Quarterly Percent
1999-04-01 47.9
1999-07-01 48.3
1999-10-01 48
2000-01-01 47.7
2000-04-01 47.2
2000-07-01 46.8
2000-10-01 46.5
2001-01-01 46.2
2001-04-01 46.1
2001-07-01 45.8
2001-10-01 45.5
2002-01-01 45.3
2002-04-01 44.9
2002-07-01 44.6
2002-10-01 44.1
2003-01-01 43.8
2003-04-01 42.7
2003-07-01 42.4
2003-10-01 42.5
2004-01-01 42.4
2004-04-01 42.1
2004-07-01 42.5
2004-10-01 41.9
2005-01-01 41.6
2005-04-01 41.7
2005-07-01 41.7
2005-10-01 41.4
2006-01-01 41.4
2006-04-01 41
2006-07-01 40.5
2006-10-01 40.7
2007-01-01 41.0
2007-04-01 40.8
2007-07-01 41.0
2007-10-01 40.2
2008-01-01 40.4
2008-04-01 40.2
2008-07-01 40.4
2008-10-01 39.7
2009-01-01 39.5
2009-04-01 39.6
2009-07-01 39.9
2009-10-01 39.9
2010-01-01 39.6
2010-04-01 40.2
2010-07-01 39.7
2010-10-01 40.5
2011-01-01 40.1
2011-04-01 40.4
2011-07-01 40.5
2011-10-01 40.3
2012-01-01 39.5
2012-04-01 39
2012-07-01 38.8
2012-10-01 38.3
2013-01-01 38
2013-04-01 37.4
2013-07-01 36.8
2013-10-01 36.5
2014-01-01 36.3
2014-04-01 36.5
2014-07-01 36.6
2014-10-01 36.4
2015-01-01 36.1
2015-04-01 36.0
2015-07-01 35.4
2015-10-01 34.8
2016-01-01 34.5
2016-04-01 34.1
2016-07-01 34.2
2016-10-01 34.1
2017-01-01 33.6
2017-04-01 33.6
2017-07-01 33.7
2017-10-01 33.3
2018-01-01 32.7
2018-04-01 32.6