Year | Value | 2022 | 80.497 | 2021 | 80.018 | 2020 | 80.433 | 2019 | 81.319 | 2018 | 81.195 | 2017 | 81.116 | 2016 | 81.033 | 2015 | 80.84 | 2014 | 80.813 | 2013 | 80.646 | 2012 | 80.369 | 2011 | 80.109 | 2010 | 79.966 | 2009 | 79.901 | 2008 | 79.719 | 2007 | 79.469 | 2006 | 78.941 | 2005 | 78.723 | 2004 | 78.253 | 2003 | 77.97 | 2002 | 77.908 | 2001 | 77.669 | 2000 | 77.48 | 1999 | 76.716 | 1998 | 76.636 | 1997 | 76.367 | 1996 | 75.963 | 1995 | 75.111 | 1994 | 74.702 | 1993 | 74.352 | 1992 | 73.995 | 1991 | 73.599 | 1990 | 73.701 | 1989 | 73.671 | 1988 | 73.34 | 1987 | 73.333 | 1986 | 73.283 | 1985 | 73.178 | 1984 | 73.115 | 1983 | 72.976 | 1982 | 72.808 | 1981 | 72.362 | 1980 | 72.173 | 1979 | 71.637 | 1978 | 71.339 | 1977 | 70.777 | 1976 | 70.457 | 1975 | 69.799 | 1974 | 69.109 |
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