Quarterly Percent
1998-01-01 49.9
1998-04-01 50.4
1998-07-01 50.2
1998-10-01 48.8
1999-01-01 50.5
1999-04-01 51.0
1999-07-01 50.4
1999-10-01 49.7
2000-01-01 51.0
2000-04-01 51.4
2000-07-01 50.9
2000-10-01 49.9
2001-01-01 50.2
2001-04-01 50.8
2001-07-01 49.8
2001-10-01 50.4
2002-01-01 52.1
2002-04-01 51.9
2002-07-01 51.7
2002-10-01 50.3
2003-01-01 52
2003-04-01 51.8
2003-07-01 51.7
2003-10-01 51.2
2004-01-01 50.3
2004-04-01 50.2
2004-07-01 49.8
2004-10-01 50.6
2005-01-01 50.6
2005-04-01 50.9
2005-07-01 50
2005-10-01 50.1
2006-01-01 49.5
2006-04-01 50.2
2006-07-01 50.6
2006-10-01 49.9
2007-01-01 50.7
2007-04-01 50.5
2007-07-01 51.7
2007-10-01 51.2
2008-01-01 50.2
2008-04-01 51.1
2008-07-01 51.2
2008-10-01 50.3
2009-01-01 50.4
2009-04-01 49.7
2009-07-01 49.2
2009-10-01 49.4
2010-01-01 49.5
2010-04-01 49.5
2010-07-01 49.3
2010-10-01 49.6
2011-01-01 48.9
2011-04-01 47.7
2011-07-01 48
2011-10-01 46.6
2012-01-01 47
2012-04-01 46.8
2012-07-01 46.9
2012-10-01 45.4
2013-01-01 45.6
2013-04-01 47.1
2013-07-01 47.2
2013-10-01 47.8
2014-01-01 47.6
2014-04-01 47.8
2014-07-01 48.4
2014-10-01 47.5
2015-01-01 48.6
2015-04-01 50.4
2015-07-01 50.2
2015-10-01 50.4
2016-01-01 50.0
2016-04-01 52.2
2016-07-01 53.2
2016-10-01 52.9
2017-01-01 53.9
2017-04-01 56.1
2017-07-01 57.1
2017-10-01 57.8
2018-01-01 58.3
2018-04-01 59.4