Quarterly Percent
1998-01-01 37.7
1998-04-01 38.5
1998-07-01 38.9
1998-10-01 39.3
1999-01-01 38.9
1999-04-01 39.5
1999-07-01 39.6
1999-10-01 39.6
2000-01-01 39.2
2000-04-01 40
2000-07-01 40.4
2000-10-01 40.7
2001-01-01 40.5
2001-04-01 40.7
2001-07-01 41.1
2001-10-01 41.2
2002-01-01 41
2002-04-01 41.4
2002-07-01 41.6
2002-10-01 41.6
2003-01-01 41.3
2003-04-01 42.1
2003-07-01 42
2003-10-01 41.7
2004-01-01 43.8
2004-04-01 43.7
2004-07-01 43.4
2004-10-01 44.3
2005-01-01 43.4
2005-04-01 43.4
2005-07-01 42.7
2005-10-01 44
2006-01-01 43.7
2006-04-01 43.9
2006-07-01 43.1
2006-10-01 44
2007-01-01 42.9
2007-04-01 43.4
2007-07-01 43.6
2007-10-01 44.3
2008-01-01 44.4
2008-04-01 44.9
2008-07-01 44.2
2008-10-01 44.5
2009-01-01 44.2
2009-04-01 44.4
2009-07-01 43.4
2009-10-01 44.3
2010-01-01 44.1
2010-04-01 44.3
2010-07-01 43.4
2010-10-01 44.6
2011-01-01 44.4
2011-04-01 44.4
2011-07-01 43.8
2011-10-01 45.3
2012-01-01 46
2012-04-01 46.3
2012-07-01 45.4
2012-10-01 46.6
2013-01-01 46.5
2013-04-01 46.1
2013-07-01 45.3
2013-10-01 46.7
2014-01-01 46.7
2014-04-01 46.5
2014-07-01 46.3
2014-10-01 47.7
2015-01-01 46.8
2015-04-01 46.8
2015-07-01 45.8
2015-10-01 46.9
2016-01-01 46.8
2016-04-01 47.9
2016-07-01 47.2
2016-10-01 48.1
2017-01-01 48.0
2017-04-01 48.2
2017-07-01 48.0
2017-10-01 48.5
2018-01-01 48.3
2018-04-01 49.1