Year | Value | 2021 | 82.632 | 2020 | 85.834 | 2019 | 85.608 | 2018 | 85.427 | 2017 | 85.29 | 2016 | 85.186 | 2015 | 85.081 | 2014 | 84.952 | 2013 | 84.776 | 2012 | 84.525 | 2011 | 84.203 | 2010 | 83.812 | 2009 | 83.442 | 2008 | 83.077 | 2007 | 82.765 | 2006 | 82.518 | 2005 | 82.39 | 2004 | 82.344 | 2003 | 82.353 | 2002 | 82.374 | 2001 | 82.359 | 2000 | 82.212 | 1999 | 81.825 | 1998 | 80.919 | 1997 | 80.15 | 1996 | 79.125 | 1995 | 78.017 | 1994 | 77.168 | 1993 | 76.642 | 1992 | 76.252 | 1991 | 75.983 | 1990 | 75.775 | 1989 | 75.531 | 1988 | 75.128 | 1987 | 74.505 | 1986 | 74.085 | 1985 | 73.224 | 1984 | 72.246 | 1983 | 71.242 | 1982 | 70.354 | 1981 | 69.46 | 1980 | 68.608 | 1979 | 67.717 | 1978 | 67.001 | 1977 | 66.378 | 1976 | 65.813 | 1975 | 65.323 | 1974 | 64.93 | 1973 | 64.655 | 1972 | 64.412 | 1971 | 64.189 | 1970 | 63.971 | 1969 | 63.743 | 1968 | 63.497 | 1967 | 63.226 | 1966 | 62.924 | 1965 | 62.6 | 1964 | 62.311 | 1963 | 62.036 | 1962 | 61.766 | 1961 | 61.483 | 1960 | 61.16 |
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