Year | Value | 2022 | 82.384 | 2021 | 82.258 | 2020 | 82.111 | 2019 | 81.944 | 2018 | 81.757 | 2017 | 81.548 | 2016 | 81.319 | 2015 | 81.086 | 2014 | 80.851 | 2013 | 80.615 | 2012 | 80.376 | 2011 | 80.143 | 2010 | 79.922 | 2009 | 79.7 | 2008 | 79.476 | 2007 | 79.25 | 2006 | 79.019 | 2005 | 78.782 | 2004 | 78.543 | 2003 | 78.302 | 2002 | 78.059 | 2001 | 77.932 | 2000 | 78.023 | 1999 | 78.114 | 1998 | 78.204 | 1997 | 78.295 | 1996 | 78.384 | 1995 | 78.474 | 1994 | 78.564 | 1993 | 78.653 | 1992 | 78.742 | 1991 | 78.8 | 1990 | 78.8 | 1989 | 78.8 | 1988 | 78.8 | 1987 | 78.8 | 1986 | 78.8 | 1985 | 78.8 | 1984 | 78.8 | 1983 | 78.8 | 1982 | 78.8 | 1981 | 78.807 | 1980 | 78.827 | 1979 | 78.847 | 1978 | 78.867 | 1977 | 78.887 | 1976 | 78.927 | 1975 | 79.008 | 1974 | 79.088 | 1973 | 79.168 | 1972 | 79.248 | 1971 | 79.389 | 1970 | 79.647 | 1969 | 79.903 | 1968 | 80.156 | 1967 | 80.407 | 1966 | 80.618 | 1965 | 80.699 | 1964 | 80.779 | 1963 | 80.859 | 1962 | 80.939 | 1961 | 81.014 | 1960 | 81.074 |
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