Year | Value | 2021 | 77.216 | 2020 | 77.464 | 2019 | 78.175 | 2018 | 78.028 | 2017 | 77.871 | 2016 | 77.684 | 2015 | 77.563 | 2014 | 77.331 | 2013 | 77.084 | 2012 | 76.931 | 2011 | 76.665 | 2010 | 76.459 | 2009 | 76.233 | 2008 | 76.027 | 2007 | 75.825 | 2006 | 75.639 | 2005 | 75.417 | 2004 | 75.202 | 2003 | 74.984 | 2002 | 73.631 | 2001 | 73.388 | 2000 | 73.166 | 1999 | 72.348 | 1998 | 71.704 | 1997 | 71.555 | 1996 | 71.365 | 1995 | 71.152 | 1994 | 71.027 | 1993 | 70.938 | 1992 | 70.831 | 1991 | 70.698 | 1990 | 70.262 | 1989 | 70.09 | 1988 | 69.907 | 1987 | 69.768 | 1986 | 69.303 | 1985 | 69.075 | 1984 | 68.824 | 1983 | 68.317 | 1982 | 68.037 | 1981 | 67.496 | 1980 | 66.865 | 1979 | 66.199 | 1978 | 65.589 | 1977 | 64.911 | 1976 | 64.229 | 1975 | 63.484 | 1974 | 62.74 | 1973 | 61.656 | 1972 | 60.683 | 1971 | 59.478 | 1970 | 58.249 | 1969 | 56.956 | 1968 | 55.692 | 1967 | 54.424 | 1966 | 53.298 | 1965 | 52.131 | 1964 | 50.967 | 1963 | 49.584 | 1962 | 48.646 | 1961 | 47.606 | 1960 | 46.613 |
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