Quarterly Percent
1998-01-01 46.6
1999-01-01 47.2
1999-04-01 46.9
1999-07-01 47.5
1999-10-01 47.1
2000-01-01 47.1
2000-04-01 46.8
2000-07-01 47.2
2000-10-01 47.3
2001-01-01 47.3
2001-04-01 47.8
2001-07-01 47.6
2001-10-01 48
2002-01-01 48.4
2002-04-01 48.6
2002-07-01 48.7
2002-10-01 48.6
2003-01-01 48.6
2003-04-01 49.1
2003-07-01 49.5
2003-10-01 48.6
2004-01-01 47.1
2004-04-01 47.2
2004-07-01 47.9
2004-10-01 47.4
2005-01-01 47.9
2005-04-01 48
2005-07-01 49
2005-10-01 48.3
2006-01-01 48.5
2006-04-01 48.9
2006-07-01 49.8
2006-10-01 49.1
2007-01-01 49.5
2007-04-01 49.6
2007-07-01 50.8
2007-10-01 50.3
2008-01-01 50.6
2008-04-01 50.9
2008-07-01 51.5
2008-10-01 51.1
2009-01-01 51.1
2009-04-01 51.2
2009-07-01 51.7
2009-10-01 51.2
2010-01-01 51.4
2010-04-01 51.3
2010-07-01 52.2
2010-10-01 51.7
2011-01-01 51.7
2011-04-01 51.8
2011-07-01 52.7
2011-10-01 51.8
2012-01-01 52
2012-04-01 52.3
2012-07-01 52.8
2012-10-01 52.3
2013-01-01 52
2013-04-01 52.4
2013-07-01 53
2013-10-01 52
2014-01-01 52.1
2014-04-01 52.5
2014-07-01 52.5
2014-10-01 52.2
2015-01-01 51.9
2015-04-01 52.1
2015-07-01 53.0
2015-10-01 52.6
2016-01-01 52.5
2016-04-01 52.6
2016-07-01 53.3
2016-10-01 52.9
2017-01-01 52.7
2017-04-01 53.1
2017-07-01 53.4
2017-10-01 53.2
2018-01-01 53.0
2018-04-01 53.1