Quarterly Percent
1998-04-01 40.6
1999-04-01 42.3
2000-04-01 40.7
2001-01-01 46.5
2001-04-01 52.4
2001-07-01 54.5
2001-10-01 46.8
2002-01-01 46
2002-04-01 50.5
2002-07-01 53.5
2002-10-01 46.3
2003-01-01 44.7
2003-04-01 50.6
2003-07-01 51.6
2003-10-01 44
2004-01-01 43.4
2004-04-01 48.5
2004-07-01 52
2004-10-01 44.7
2005-01-01 43.3
2005-04-01 55.8
2005-07-01 53.8
2005-10-01 46.6
2006-01-01 45.8
2006-04-01 55.7
2006-07-01 55.9
2006-10-01 47.9
2007-01-01 48.3
2007-04-01 55.1
2007-07-01 56.4
2007-10-01 49.1
2008-01-01 49.1
2008-04-01 57.7
2008-07-01 56.5
2008-10-01 48.1
2009-01-01 47.7
2009-04-01 56.9
2009-07-01 53.1
2009-10-01 46.4
2010-01-01 47.1
2010-04-01 56.2
2010-07-01 55.2
2010-10-01 47.9
2011-01-01 49.2
2011-04-01 57.5
2011-07-01 56.2
2011-10-01 49
2012-01-01 48.6
2012-04-01 56.8
2012-07-01 56
2012-10-01 48.9
2013-01-01 50.4
2013-04-01 58.5
2013-07-01 57.8
2013-10-01 51.3
2014-01-01 51.8
2014-04-01 59.4
2014-07-01 59.4
2014-10-01 51.3
2015-01-01 52.4
2015-04-01 58.9
2015-07-01 58.3
2015-10-01 51.0
2016-01-01 52.7
2016-04-01 60.0
2016-07-01 56.2
2016-10-01 50.4
2017-01-01 51.9
2017-04-01 58.4
2017-07-01 57.7
2017-10-01 50.9
2018-01-01 51.0
2018-04-01 57.9