Quarterly Percent
1998-04-01 54.8
1999-04-01 56.2
2000-04-01 57.1
2001-01-01 58.5
2001-04-01 59.8
2001-07-01 60.4
2001-10-01 59.1
2002-01-01 58.5
2002-04-01 59.6
2002-07-01 60
2002-10-01 58.7
2003-01-01 58
2003-04-01 59.3
2003-07-01 59.5
2003-10-01 58
2004-01-01 57.3
2004-04-01 58.4
2004-07-01 59
2004-10-01 57.5
2005-01-01 56.8
2005-04-01 58.5
2005-07-01 59.2
2005-10-01 58.2
2006-01-01 57.5
2006-04-01 58.9
2006-07-01 60.1
2006-10-01 59
2007-01-01 58.6
2007-04-01 59.9
2007-07-01 61
2007-10-01 59.6
2008-01-01 59.2
2008-04-01 60.4
2008-07-01 61
2008-10-01 59.2
2009-01-01 57.8
2009-04-01 58.4
2009-07-01 58.6
2009-10-01 57.3
2010-01-01 56.6
2010-04-01 58
2010-07-01 58.9
2010-10-01 57.8
2011-01-01 57.7
2011-04-01 59
2011-07-01 59.7
2011-10-01 58.5
2012-01-01 57.8
2012-04-01 59.1
2012-07-01 59.8
2012-10-01 58.5
2013-01-01 58
2013-04-01 59.3
2013-07-01 60.1
2013-10-01 59
2014-01-01 58.3
2014-04-01 59.7
2014-07-01 60.9
2014-10-01 59.4
2015-01-01 59.0
2015-04-01 60.1
2015-07-01 61.0
2015-10-01 60.0
2016-01-01 59.4
2016-04-01 60.8
2016-07-01 61.2
2016-10-01 60.3
2017-01-01 60.2
2017-04-01 61.4
2017-07-01 62.1
2017-10-01 61.0
2018-01-01 60.8
2018-04-01 62.0