Year | Value | 2022 | 83.492 | 2021 | 83.365 | 2020 | 83.245 | 2019 | 83.132 | 2018 | 83.025 | 2017 | 82.925 | 2016 | 82.832 | 2015 | 82.746 | 2014 | 82.668 | 2013 | 82.596 | 2012 | 82.532 | 2011 | 82.476 | 2010 | 82.427 | 2009 | 82.385 | 2008 | 82.343 | 2007 | 82.302 | 2006 | 82.26 | 2005 | 82.218 | 2004 | 82.176 | 2003 | 82.134 | 2002 | 82.092 | 2001 | 82.049 | 2000 | 82.007 | 1999 | 81.824 | 1998 | 81.611 | 1997 | 81.396 | 1996 | 81.18 | 1995 | 80.961 | 1994 | 80.74 | 1993 | 80.518 | 1992 | 80.293 | 1991 | 80.067 | 1990 | 79.838 | 1989 | 79.284 | 1988 | 78.654 | 1987 | 78.007 | 1986 | 77.347 | 1985 | 76.674 | 1984 | 75.987 | 1983 | 75.285 | 1982 | 74.571 | 1981 | 73.843 | 1980 | 73.102 | 1979 | 72.484 | 1978 | 71.879 | 1977 | 71.266 | 1976 | 70.647 | 1975 | 70.017 | 1974 | 69.381 | 1973 | 68.738 | 1972 | 68.088 | 1971 | 67.429 | 1970 | 66.764 | 1969 | 66.093 | 1968 | 65.416 | 1967 | 64.73 | 1966 | 64.04 | 1965 | 63.343 | 1964 | 62.642 | 1963 | 61.926 | 1962 | 61.193 | 1961 | 60.454 | 1960 | 59.712 |
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