Year | Value | 2022 | 77.291 | 2021 | 77.003 | 2020 | 76.719 | 2019 | 76.44 | 2018 | 76.164 | 2017 | 75.894 | 2016 | 75.628 | 2015 | 75.368 | 2014 | 75.113 | 2013 | 74.863 | 2012 | 74.619 | 2011 | 74.381 | 2010 | 74.149 | 2009 | 73.923 | 2008 | 73.704 | 2007 | 73.491 | 2006 | 73.276 | 2005 | 73.061 | 2004 | 72.845 | 2003 | 72.627 | 2002 | 72.409 | 2001 | 72.189 | 2000 | 71.969 | 1999 | 71.747 | 1998 | 71.524 | 1997 | 71.187 | 1996 | 70.705 | 1995 | 70.216 | 1994 | 69.724 | 1993 | 69.227 | 1992 | 68.726 | 1991 | 68.219 | 1990 | 67.709 | 1989 | 67.194 | 1988 | 66.676 | 1987 | 66.152 | 1986 | 65.626 | 1985 | 65.095 | 1984 | 64.561 | 1983 | 64.022 | 1982 | 63.481 | 1981 | 62.936 | 1980 | 62.388 | 1979 | 61.836 | 1978 | 61.281 | 1977 | 60.723 | 1976 | 60.164 | 1975 | 59.6 | 1974 | 58.553 | 1973 | 57.499 | 1972 | 56.439 | 1971 | 55.371 | 1970 | 54.298 | 1969 | 53.222 | 1968 | 52.145 | 1967 | 51.062 | 1966 | 49.98 | 1965 | 48.898 | 1964 | 47.818 | 1963 | 46.737 | 1962 | 45.661 | 1961 | 44.734 | 1960 | 44.044 |
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