Annual
1977-12-31 4.6619
1978-12-31 4.6832
1979-12-31 5.0011
1980-12-31 4.9746
1981-12-31 5.5927
1982-12-31 6.0757
1983-12-31 7.2711
1984-12-31 7.8178
1985-12-31 7.791
1986-12-31 7.8036
1987-12-31 7.798
1988-12-31 7.8056
1989-12-31 7.7999
1990-12-31 7.7889
1991-12-31 7.7703
1992-12-31 7.7395
1993-12-31 7.7352
1994-12-31 7.7272
1995-12-31 7.7356
1996-12-31 7.7342
1997-12-31 7.7413
1998-12-31 7.7462
1999-12-31 7.7591
2000-12-31 7.7922
2001-12-31 7.8011
2002-12-31 7.7995
2003-12-31 7.787
2004-12-31 7.7887
2005-12-31 7.7777
2006-12-31 7.7687
2007-12-31 7.8016
2008-12-31 7.7866
2009-12-31 7.7516
2010-12-31 7.7689
2011-12-31 7.7848
2012-12-31 7.757
2013-12-31 7.7566
2014-12-31 7.7547
2015-12-31 7.7526
2016-12-31 7.7625
2017-12-31 7.7928
2018-12-31 7.8374
2019-12-31 7.8351
2020-12-31 7.7561
2021-12-31 7.7727
2022-12-31 7.8304
2023-12-31 7.8288