Quarterly Percent
1998-04-01 31.8
1999-04-01 35
2000-04-01 37.1
2001-01-01 39.8
2001-04-01 47
2001-07-01 49.7
2001-10-01 42.2
2002-01-01 40.9
2002-04-01 44.3
2002-07-01 48.8
2002-10-01 41.4
2003-01-01 40.1
2003-04-01 44.1
2003-07-01 45.8
2003-10-01 38.4
2004-01-01 36.6
2004-04-01 39.9
2004-07-01 44.9
2004-10-01 37.4
2005-01-01 34.4
2005-04-01 41.2
2005-07-01 45
2005-10-01 38.3
2006-01-01 34.5
2006-04-01 40.6
2006-07-01 47.7
2006-10-01 38.8
2007-01-01 37.4
2007-04-01 42.6
2007-07-01 48.5
2007-10-01 40.6
2008-01-01 39
2008-04-01 43.3
2008-07-01 47.2
2008-10-01 38.8
2009-01-01 36.8
2009-04-01 41.2
2009-07-01 41.4
2009-10-01 36.1
2010-01-01 34.8
2010-04-01 40.2
2010-07-01 44.1
2010-10-01 37.6
2011-01-01 36.9
2011-04-01 41.5
2011-07-01 46.1
2011-10-01 39.6
2012-01-01 38.2
2012-04-01 42.9
2012-07-01 46.3
2012-10-01 38.9
2013-01-01 38.1
2013-04-01 43.7
2013-07-01 47.4
2013-10-01 42.3
2014-01-01 39.4
2014-04-01 44.4
2014-07-01 50.5
2014-10-01 41.8
2015-01-01 41.2
2015-04-01 45.8
2015-07-01 51.4
2015-10-01 43.6
2016-01-01 43.5
2016-04-01 47.9
2016-07-01 49.3
2016-10-01 43.1
2017-01-01 43.0
2017-04-01 46.5
2017-07-01 49.9
2017-10-01 44.5
2018-01-01 43.0
2018-04-01 48.5