Quarterly Percent
1998-01-01 42.7
1998-04-01 42.9
1998-07-01 43.3
1998-10-01 43.2
1999-01-01 44.2
1999-04-01 43.9
1999-07-01 43.6
1999-10-01 43.6
2000-01-01 43.6
2000-04-01 43.9
2000-07-01 44.1
2000-10-01 43.7
2001-01-01 43.6
2001-04-01 43.2
2001-07-01 43.1
2001-10-01 42.7
2002-01-01 43.5
2002-04-01 44.2
2002-07-01 44.7
2002-10-01 44.6
2003-01-01 44.7
2003-04-01 45.1
2003-07-01 45.5
2003-10-01 45.5
2004-01-01 46.4
2004-04-01 46.8
2004-07-01 46.9
2004-10-01 46.9
2005-01-01 46.6
2005-04-01 47.1
2005-07-01 47.2
2005-10-01 47.3
2006-01-01 47.4
2006-04-01 47.5
2006-07-01 47.9
2006-10-01 47.5
2007-01-01 47.5
2007-04-01 47.8
2007-07-01 47.7
2007-10-01 47.5
2008-01-01 47.5
2008-04-01 47.9
2008-07-01 48
2008-10-01 48.2
2009-01-01 48.8
2009-04-01 49.3
2009-07-01 49.7
2009-10-01 49.6
2010-01-01 49.9
2010-04-01 50.3
2010-07-01 50.4
2010-10-01 50.3
2011-01-01 50.1
2011-04-01 49.9
2011-07-01 50
2011-10-01 50.4
2012-01-01 50.4
2012-04-01 50.5
2012-07-01 50.7
2012-10-01 50.7
2013-01-01 50.3
2013-04-01 50.8
2013-07-01 50.7
2013-10-01 50.4
2014-01-01 50.8
2014-04-01 51.1
2014-07-01 51.3
2014-10-01 51.2
2015-01-01 51.4
2015-04-01 52.0
2015-07-01 52.3
2015-10-01 52.2
2016-01-01 52.2
2016-04-01 52.5
2016-07-01 52.7
2016-10-01 51.9
2017-01-01 52.0
2017-04-01 52.6
2017-07-01 52.1
2017-10-01 51.5
2018-01-01 51.2
2018-04-01 52.1