Year | Value | 2021 | 76.223 | 2020 | 76.657 | 2019 | 77.81 | 2018 | 77.863 | 2017 | 77.795 | 2016 | 77.653 | 2015 | 77.468 | 2014 | 77.248 | 2013 | 77.038 | 2012 | 76.819 | 2011 | 76.627 | 2010 | 76.448 | 2009 | 76.343 | 2008 | 76.225 | 2007 | 76.154 | 2006 | 76.012 | 2005 | 75.829 | 2004 | 75.544 | 2003 | 75.218 | 2002 | 74.824 | 2001 | 74.414 | 2000 | 74.001 | 1999 | 73.622 | 1998 | 73.279 | 1997 | 72.97 | 1996 | 72.675 | 1995 | 72.385 | 1994 | 72.096 | 1993 | 71.8 | 1992 | 71.462 | 1991 | 71.207 | 1990 | 71.097 | 1989 | 69.936 | 1988 | 70.888 | 1987 | 70.888 | 1986 | 70.833 | 1985 | 70.732 | 1984 | 70.543 | 1983 | 70.27 | 1982 | 69.939 | 1981 | 69.586 | 1980 | 69.254 | 1979 | 68.989 | 1978 | 68.761 | 1977 | 68.603 | 1976 | 68.381 | 1975 | 68.079 | 1974 | 67.653 | 1973 | 67.087 | 1972 | 66.457 | 1971 | 65.787 | 1970 | 65.083 | 1969 | 64.662 | 1968 | 64.313 | 1967 | 64.056 | 1966 | 63.789 | 1965 | 63.558 | 1964 | 63.203 | 1963 | 62.735 | 1962 | 62.154 | 1961 | 61.471 | 1960 | 60.702 |
|