Annual Percent
1979-01-01 82.1067714166667
1980-01-01 82.2581297333333
1981-01-01 82.3239961583333
1982-01-01 80.5068128000000
1983-01-01 76.9261000166667
1984-01-01 77.4048171500000
1985-01-01 77.6591030916667
1986-01-01 78.2166625916666
1987-01-01 77.7288869083334
1988-01-01 78.5618439833333
1989-01-01 79.8052409083333
1990-01-01 79.2123318583333
1991-01-01 75.7557685333334
1992-01-01 74.1605051916666
1993-01-01 73.6997459083334
1994-01-01 75.0552903416667
1995-01-01 76.3848185583334
1996-01-01 76.3037018500000
1997-01-01 75.8458622500000
1998-01-01 76.1705924416666
1999-01-01 76.5988056750000
2000-01-01 76.9245406416667
2001-01-01 76.3579576000000
2002-01-01 76.6895701250000
2003-01-01 77.0550408583333
2004-01-01 77.6050873583333
2005-01-01 78.5057049666667
2006-01-01 78.8097965833333
2007-01-01 79.5439623583333
2008-01-01 79.6843005750000
2009-01-01 77.7897546000000
2010-01-01 78.5927521416667
2011-01-01 78.6739646583334
2012-01-01 78.1329600666667
2013-01-01 77.5424091250000
2014-01-01 77.0710029750000
2015-01-01 77.5371384916667
2016-01-01 77.5367226250000
2017-01-01 77.8893799750000