Year | Value | 2021 | 75.503 | 2020 | 75.459 | 2019 | 74.805 | 2018 | 75.314 | 2017 | 75.27 | 2016 | 75.215 | 2015 | 75.188 | 2014 | 75.142 | 2013 | 75.099 | 2012 | 74.848 | 2011 | 74.983 | 2010 | 75.048 | 2009 | 72.494 | 2008 | 75.042 | 2007 | 75.014 | 2006 | 74.964 | 2005 | 74.686 | 2004 | 74.694 | 2003 | 74.497 | 2002 | 74.309 | 2001 | 74.071 | 2000 | 73.828 | 1999 | 73.569 | 1998 | 73.315 | 1997 | 73.057 | 1996 | 72.797 | 1995 | 72.536 | 1994 | 72.273 | 1993 | 72.006 | 1992 | 71.719 | 1991 | 71.2 | 1990 | 71.049 | 1989 | 70.985 | 1988 | 70.747 | 1987 | 70.491 | 1986 | 70.201 | 1985 | 69.926 | 1984 | 69.608 | 1983 | 69.336 | 1982 | 68.983 | 1981 | 68.654 | 1980 | 68.249 | 1979 | 67.827 | 1978 | 67.353 | 1977 | 66.833 | 1976 | 66.282 | 1975 | 65.701 | 1974 | 65.068 | 1973 | 64.421 | 1972 | 63.728 | 1971 | 63.052 | 1970 | 62.403 | 1969 | 61.719 | 1968 | 60.983 | 1967 | 60.314 | 1966 | 59.552 | 1965 | 59.091 | 1964 | 54.213 | 1963 | 57.736 | 1962 | 57.056 | 1961 | 56.345 | 1960 | 55.619 |
|