Quarterly Percent
1998-04-01 42.9
1999-04-01 43.1
2000-04-01 41.1
2001-01-01 47.2
2001-04-01 52.2
2001-07-01 54.5
2001-10-01 46.2
2002-01-01 44.9
2002-04-01 50.5
2002-07-01 52.7
2002-10-01 45.8
2003-01-01 43.2
2003-04-01 50.5
2003-07-01 51.7
2003-10-01 43.6
2004-01-01 43
2004-04-01 48.9
2004-07-01 51.6
2004-10-01 44.8
2005-01-01 43.7
2005-04-01 54.5
2005-07-01 52.8
2005-10-01 44.9
2006-01-01 45
2006-04-01 55.3
2006-07-01 54.7
2006-10-01 48.2
2007-01-01 49.1
2007-04-01 53.6
2007-07-01 55.9
2007-10-01 48.5
2008-01-01 48.5
2008-04-01 57.3
2008-07-01 56.4
2008-10-01 48.3
2009-01-01 47.2
2009-04-01 56.5
2009-07-01 54
2009-10-01 46.6
2010-01-01 46.3
2010-04-01 56.7
2010-07-01 55.8
2010-10-01 49
2011-01-01 49.1
2011-04-01 57.9
2011-07-01 56.6
2011-10-01 49
2012-01-01 47.2
2012-04-01 55.7
2012-07-01 55.4
2012-10-01 48.7
2013-01-01 49.7
2013-04-01 57.8
2013-07-01 57.4
2013-10-01 50.6
2014-01-01 51.1
2014-04-01 59.1
2014-07-01 58.1
2014-10-01 51.2
2015-01-01 51.0
2015-04-01 57.2
2015-07-01 56.9
2015-10-01 50.3
2016-01-01 51.6
2016-04-01 59.4
2016-07-01 55.7
2016-10-01 50.1
2017-01-01 50.9
2017-04-01 58.0
2017-07-01 57.3
2017-10-01 50.1
2018-01-01 50.3
2018-04-01 56.6