Quarterly Percent
1998-01-01 31.5
1998-04-01 32.2
1998-07-01 32.7
1998-10-01 32.8
1999-01-01 32.5
1999-04-01 33
1999-07-01 33.6
1999-10-01 33.6
2000-01-01 33.2
2000-04-01 34
2000-07-01 34.7
2000-10-01 35.1
2001-01-01 34.9
2001-04-01 35.4
2001-07-01 35.9
2001-10-01 36
2002-01-01 35.9
2002-04-01 36.2
2002-07-01 36.7
2002-10-01 36.6
2003-01-01 36.4
2003-04-01 37
2003-07-01 37.3
2003-10-01 37
2004-01-01 38.8
2004-04-01 39.2
2004-07-01 39.2
2004-10-01 39.6
2005-01-01 38.9
2005-04-01 39.2
2005-07-01 38.7
2005-10-01 39.4
2006-01-01 39.4
2006-04-01 40.1
2006-07-01 39.7
2006-10-01 40.2
2007-01-01 39.5
2007-04-01 40.2
2007-07-01 40.3
2007-10-01 40.5
2008-01-01 40.4
2008-04-01 41
2008-07-01 40.7
2008-10-01 40.7
2009-01-01 40
2009-04-01 40.5
2009-07-01 39.7
2009-10-01 39.8
2010-01-01 39.5
2010-04-01 40.2
2010-07-01 39.6
2010-10-01 40.2
2011-01-01 40.2
2011-04-01 40.4
2011-07-01 39.8
2011-10-01 40.5
2012-01-01 40.4
2012-04-01 41
2012-07-01 40.4
2012-10-01 40.7
2013-01-01 40.1
2013-04-01 40.2
2013-07-01 39.8
2013-10-01 40.3
2014-01-01 40
2014-04-01 40.3
2014-07-01 40.3
2014-10-01 40.7
2015-01-01 40.3
2015-04-01 40.8
2015-07-01 40.6
2015-10-01 40.9
2016-01-01 40.7
2016-04-01 41.8
2016-07-01 41.5
2016-10-01 41.6
2017-01-01 41.6
2017-04-01 42.3
2017-07-01 42.3
2017-10-01 42.5
2018-01-01 42.1
2018-04-01 43.3