Year | Value | 2021 | 85.7 | 2020 | 85.7 | 2019 | 85.7 | 2018 | 85.7 | 2017 | 92.2 | 2016 | 92.9 | 2015 | 92.6 | 2014 | 95.2 | 2013 | 94.6 | 2012 | 95.6 | 2011 | 96.1 | 2010 | 91.1 | 2009 | 88 | 2008 | 81 | 2007 | 82 | 2006 | 84 | 2005 | 76 | 2004 | 75 | 2003 | 74 | 2002 | 74 | 2001 | 75 | 2000 | 79 | 1999 | 79 | 1998 | 80 | 1997 | 81 | 1996 | 84 | 1995 | 84 | 1994 | 84 | 1993 | 84 | 1992 | 85 | 1991 | 85 | 1990 | 85 | 1989 | 85 | 1988 | 85 | 1987 | 86 | 1986 | 86 | 1985 | 86 | 1984 | 86 | 1983 | 86 | 1982 | 87 | 1981 | 87 | 1980 | 87 | 1979 | 87 | 1978 | 87 | 1977 | 88 | 1976 | 88 | 1975 | 88 | 1974 | 88 | 1973 | 88 | 1972 | 89 | 1971 | 89 | 1970 | 89 | 1969 | 89 | 1968 | 90 | 1967 | 90 | 1966 | 90 | 1965 | 90 | 1964 | 90 | 1963 | 90 | 1962 | 90 | 1961 | 90 |
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