Year | Value | 2021 | 85.1 | 2020 | 84.5 | 2019 | 85.7 | 2018 | 85.6 | 2017 | 85.2 | 2016 | 85.6 | 2015 | 84.9 | 2014 | 85.6 | 2013 | 85.2 | 2012 | 84.8 | 2011 | 84.8 | 2010 | 84.7 | 2009 | 84.3 | 2008 | 84.2 | 2007 | 84.2 | 2006 | 84.1 | 2005 | 83.6 | 2004 | 83.7 | 2003 | 82.8 | 2002 | 83.2 | 2001 | 83.2 | 2000 | 82.8 | 1999 | 82.6 | 1998 | 82.1 | 1997 | 82 | 1996 | 81.8 | 1995 | 81.5 | 1994 | 81.2 | 1993 | 81 | 1992 | 80.8 | 1991 | 80.4 | 1990 | 80.3 | 1989 | 80.2 | 1988 | 79.7 | 1987 | 79.6 | 1986 | 79.1 | 1985 | 78.8 | 1984 | 78.77 | 1983 | 77.99 | 1982 | 78.19 | 1981 | 77.76 | 1980 | 77.38 | 1979 | 77.46 | 1978 | 77.13 | 1977 | 76.74 | 1976 | 76.27 | 1975 | 75.91 | 1974 | 75.91 | 1973 | 75.12 | 1972 | 75.21 | 1971 | 74.88 | 1970 | 74.55 | 1969 | 73.88 | 1968 | 73.72 | 1967 | 73.83 | 1966 | 73.82 | 1965 | 73.04 | 1964 | 73.18 | 1963 | 72.06 | 1962 | 71.89 | 1961 | 72.48 | 1960 | 71.69 |
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