Year | Value | 2022 | 82.05 | 2021 | 81.74 | 2020 | 81.425 | 2019 | 81.104 | 2018 | 80.778 | 2017 | 80.446 | 2016 | 80.108 | 2015 | 79.764 | 2014 | 79.415 | 2013 | 79.061 | 2012 | 78.701 | 2011 | 78.335 | 2010 | 77.964 | 2009 | 77.587 | 2008 | 77.204 | 2007 | 76.816 | 2006 | 76.423 | 2005 | 76.024 | 2004 | 75.62 | 2003 | 75.211 | 2002 | 74.797 | 2001 | 74.379 | 2000 | 73.957 | 1999 | 73.53 | 1998 | 73.098 | 1997 | 72.662 | 1996 | 72.223 | 1995 | 71.777 | 1994 | 71.328 | 1993 | 70.874 | 1992 | 70.415 | 1991 | 69.949 | 1990 | 69.481 | 1989 | 69.008 | 1988 | 68.532 | 1987 | 68.051 | 1986 | 67.566 | 1985 | 67.034 | 1984 | 66.387 | 1983 | 65.733 | 1982 | 65.073 | 1981 | 64.408 | 1980 | 63.738 | 1979 | 63.061 | 1978 | 62.379 | 1977 | 61.693 | 1976 | 61.003 | 1975 | 60.306 | 1974 | 59.607 | 1973 | 58.89 | 1972 | 58.143 | 1971 | 57.39 | 1970 | 56.635 | 1969 | 55.877 | 1968 | 55.117 | 1967 | 54.352 | 1966 | 53.587 | 1965 | 52.82 | 1964 | 52.027 | 1963 | 50.584 | 1962 | 49.143 | 1961 | 47.702 | 1960 | 46.268 |
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