Year | Value | 2021 | 81.463 | 2020 | 80.023 | 2019 | 82.266 | 2018 | 82.281 | 2017 | 82.303 | 2016 | 82.203 | 2015 | 82.004 | 2014 | 81.772 | 2013 | 81.542 | 2012 | 81.072 | 2011 | 80.617 | 2010 | 80.105 | 2009 | 79.589 | 2008 | 79.36 | 2007 | 79.302 | 2006 | 79.282 | 2005 | 79.187 | 2004 | 79.087 | 2003 | 79.11 | 2002 | 78.973 | 2001 | 78.94 | 2000 | 78.881 | 1999 | 78.698 | 1998 | 78.551 | 1997 | 78.363 | 1996 | 77.882 | 1995 | 77.84 | 1994 | 77.979 | 1993 | 77.945 | 1992 | 77.866 | 1991 | 77.547 | 1990 | 76.799 | 1989 | 77.123 | 1988 | 76.802 | 1987 | 76.094 | 1986 | 75.609 | 1985 | 75.2 | 1984 | 74.567 | 1983 | 74.163 | 1982 | 73.418 | 1981 | 73.066 | 1980 | 72.379 | 1979 | 71.694 | 1978 | 71.486 | 1977 | 71.356 | 1976 | 70.839 | 1975 | 70.35 | 1974 | 70.338 | 1973 | 69.907 | 1972 | 69.817 | 1971 | 69.728 | 1970 | 69.132 | 1969 | 68.099 | 1968 | 66.877 | 1967 | 65.998 | 1966 | 64.959 | 1965 | 64.118 | 1964 | 63.229 | 1963 | 61.989 | 1962 | 61.109 | 1961 | 60.033 | 1960 | 58.926 |
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