Year | Value | 2022 | 88.378 | 2021 | 88.325 | 2020 | 88.279 | 2019 | 88.24 | 2018 | 88.208 | 2017 | 88.183 | 2016 | 88.165 | 2015 | 88.154 | 2014 | 88.144 | 2013 | 88.133 | 2012 | 88.123 | 2011 | 88.108 | 2010 | 88.083 | 2009 | 88.057 | 2008 | 88.031 | 2007 | 88.006 | 2006 | 87.98 | 2005 | 87.954 | 2004 | 87.928 | 2003 | 87.902 | 2002 | 87.876 | 2001 | 87.85 | 2000 | 87.559 | 1999 | 87.262 | 1998 | 86.959 | 1997 | 86.65 | 1996 | 86.336 | 1995 | 86.014 | 1994 | 85.686 | 1993 | 85.352 | 1992 | 85.012 | 1991 | 84.664 | 1990 | 84.284 | 1989 | 83.833 | 1988 | 83.372 | 1987 | 82.9 | 1986 | 82.418 | 1985 | 81.925 | 1984 | 81.422 | 1983 | 80.907 | 1982 | 80.382 | 1981 | 79.82 | 1980 | 79.185 | 1979 | 78.533 | 1978 | 77.868 | 1977 | 77.189 | 1976 | 76.496 | 1975 | 75.786 | 1974 | 75.063 | 1973 | 74.325 | 1972 | 73.575 | 1971 | 72.764 | 1970 | 71.852 | 1969 | 70.92 | 1968 | 69.973 | 1967 | 69.005 | 1966 | 68.022 | 1965 | 67.022 | 1964 | 66.009 | 1963 | 64.977 | 1962 | 63.933 | 1961 | 62.875 | 1960 | 61.613 |
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