Year | Value | 2021 | 86.6 | 2020 | 86.5 | 2019 | 86.3 | 2018 | 85.7 | 2017 | 85.7 | 2016 | 85.4 | 2015 | 85.2 | 2014 | 85 | 2013 | 84.6 | 2012 | 84.2 | 2011 | 84 | 2010 | 83.6 | 2009 | 83.4 | 2008 | 83 | 2007 | 82.5 | 2006 | 82.1 | 2005 | 81.6 | 2004 | 81.2 | 2003 | 80.8 | 2002 | 80.3 | 2001 | 80.1 | 2000 | 79.7 | 1999 | 79.2 | 1998 | 79 | 1997 | 78.7 | 1996 | 78.3 | 1995 | 77.9 | 1994 | 77.7 | 1993 | 77.3 | 1992 | 76.8 | 1991 | 76.4 | 1990 | 75.9 | 1989 | 75.3 | 1988 | 74.8 | 1987 | 74.3 | 1986 | 73.8 | 1985 | 73.2 | 1984 | 72.6 | 1983 | 71.9 | 1982 | 71.5 | 1981 | 70.9 | 1980 | 70.4 | 1979 | 69.9 | 1978 | 69.5 | 1977 | 69.1 | 1976 | 68.6 | 1975 | 68.2 | 1974 | 67.8 | 1973 | 67.3 | 1972 | 66.8 | 1971 | 66.3 | 1970 | 65.8 | 1969 | 66.103 | 1968 | 65.591 | 1967 | 65.126 | 1966 | 63.108 | 1965 | 61.601 | 1964 | 60.313 | 1963 | 58.836 | 1962 | 58.018 | 1961 | 57.423 | 1960 | 56.809 |
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