Year | Value | 2022 | 92.347 | 2021 | 92.229 | 2020 | 92.111 | 2019 | 91.991 | 2018 | 91.87 | 2017 | 91.749 | 2016 | 91.627 | 2015 | 91.503 | 2014 | 91.377 | 2013 | 91.249 | 2012 | 91.121 | 2011 | 90.99 | 2010 | 90.849 | 2009 | 90.691 | 2008 | 90.53 | 2007 | 90.366 | 2006 | 90.2 | 2005 | 90.031 | 2004 | 89.86 | 2003 | 89.686 | 2002 | 89.51 | 2001 | 89.329 | 2000 | 89.142 | 1999 | 88.952 | 1998 | 88.759 | 1997 | 88.564 | 1996 | 88.366 | 1995 | 88.164 | 1994 | 87.96 | 1993 | 87.752 | 1992 | 87.542 | 1991 | 87.328 | 1990 | 86.984 | 1989 | 86.613 | 1988 | 86.233 | 1987 | 85.843 | 1986 | 85.445 | 1985 | 85.038 | 1984 | 84.621 | 1983 | 84.194 | 1982 | 83.759 | 1981 | 83.313 | 1980 | 82.887 | 1979 | 82.516 | 1978 | 82.139 | 1977 | 81.755 | 1976 | 81.366 | 1975 | 80.969 | 1974 | 80.567 | 1973 | 80.158 | 1972 | 79.743 | 1971 | 79.321 | 1970 | 78.88 | 1969 | 78.394 | 1968 | 77.901 | 1967 | 77.398 | 1966 | 76.888 | 1965 | 76.369 | 1964 | 75.844 | 1963 | 75.309 | 1962 | 74.767 | 1961 | 74.217 | 1960 | 73.611 |
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