Year | Value | 2021 | 76.808 | 2020 | 77.817 | 2019 | 79.055 | 2018 | 79.091 | 2017 | 78.904 | 2016 | 78.336 | 2015 | 77.765 | 2014 | 77.361 | 2013 | 77.211 | 2012 | 76.958 | 2011 | 76.383 | 2010 | 75.728 | 2009 | 75.011 | 2008 | 74.918 | 2007 | 75.364 | 2006 | 74.918 | 2005 | 74.356 | 2004 | 73.886 | 2003 | 72.23 | 2002 | 72.923 | 2001 | 72.559 | 2000 | 72.297 | 1999 | 71.942 | 1998 | 71.23 | 1997 | 70.968 | 1996 | 70.748 | 1995 | 70.038 | 1994 | 69.827 | 1993 | 69.323 | 1992 | 69.069 | 1991 | 68.596 | 1990 | 66.32 | 1989 | 67.727 | 1988 | 66.963 | 1987 | 66.268 | 1986 | 65.937 | 1985 | 65.304 | 1984 | 64.5 | 1983 | 63.591 | 1982 | 62.484 | 1981 | 61.35 | 1980 | 60.634 | 1979 | 59.734 | 1978 | 56.677 | 1977 | 57.35 | 1976 | 56.281 | 1975 | 55.224 | 1974 | 54.287 | 1973 | 53.246 | 1972 | 51.606 | 1971 | 51.092 | 1970 | 50.081 | 1969 | 49.154 | 1968 | 47.774 | 1967 | 47.519 | 1966 | 46.92 | 1965 | 46.056 | 1964 | 45.484 | 1963 | 44.908 | 1962 | 43.389 | 1961 | 43.667 | 1960 | 43.063 |
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