Year | Value | 2021 | 86.2 | 2020 | 85.2 | 2019 | 86.7 | 2018 | 86.3 | 2017 | 86.1 | 2016 | 86.3 | 2015 | 85.7 | 2014 | 86.2 | 2013 | 86.1 | 2012 | 85.5 | 2011 | 85.6 | 2010 | 84.7 | 2009 | 84.6 | 2008 | 84.3 | 2007 | 84.1 | 2006 | 84.1 | 2005 | 83.5 | 2004 | 83.2 | 2003 | 83 | 2002 | 83 | 2001 | 82.8 | 2000 | 82.5 | 1999 | 82.2 | 1998 | 82.2 | 1997 | 82.21 | 1996 | 81.88 | 1995 | 81.73 | 1994 | 81.62 | 1993 | 81.26 | 1992 | 81.19 | 1991 | 80.7 | 1990 | 80.51 | 1989 | 80.44 | 1988 | 80.23 | 1987 | 80.17 | 1986 | 79.85 | 1985 | 79.64 | 1984 | 79.64 | 1983 | 79.1 | 1982 | 79.32 | 1981 | 78.74 | 1980 | 78.53 | 1979 | 78.02 | 1978 | 77.42 | 1977 | 77.2 | 1976 | 76.68 | 1975 | 76.31 | 1974 | 75.92 | 1973 | 75.52 | 1972 | 75.63 | 1971 | 74.56 | 1970 | 74.87 | 1969 | 73.89 | 1968 | 74.36 | 1967 | 74.07 | 1966 | 73.78 | 1965 | 73.57 | 1964 | 73.14 | 1963 | 72.36 | 1962 | 72.08 | 1961 | 71.98 | 1960 | 71.66 |
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