Year | Value | 2021 | 74.151 | 2020 | 73.99 | 2019 | 76.688 | 2018 | 76.353 | 2017 | 76.32 | 2016 | 76.494 | 2015 | 76.282 | 2014 | 76.174 | 2013 | 75.876 | 2012 | 75.651 | 2011 | 75.154 | 2010 | 75.133 | 2009 | 75.24 | 2008 | 75.422 | 2007 | 74.766 | 2006 | 74.15 | 2005 | 73.975 | 2004 | 73.663 | 2003 | 73.311 | 2002 | 73.045 | 2001 | 72.689 | 2000 | 72.383 | 1999 | 64.749 | 1998 | 68.426 | 1997 | 71.433 | 1996 | 71.146 | 1995 | 70.841 | 1994 | 70.527 | 1993 | 70.234 | 1992 | 69.916 | 1991 | 69.747 | 1990 | 69.413 | 1989 | 69.105 | 1988 | 68.784 | 1987 | 68.417 | 1986 | 68.093 | 1985 | 67.765 | 1984 | 67.477 | 1983 | 67.145 | 1982 | 66.834 | 1981 | 66.525 | 1980 | 66.189 | 1979 | 65.911 | 1978 | 65.58 | 1977 | 65.275 | 1976 | 64.978 | 1975 | 64.67 | 1974 | 64.329 | 1973 | 64.068 | 1972 | 63.726 | 1971 | 63.413 | 1970 | 63.146 | 1969 | 62.842 | 1968 | 62.484 | 1967 | 62.229 | 1966 | 61.88 | 1965 | 61.617 | 1964 | 61.315 | 1963 | 60.943 | 1962 | 60.643 | 1961 | 60.342 | 1960 | 60.032 |
|