Year | Value | 2021 | 83.204 | 2020 | 83.448 | 2019 | 83.27 | 2018 | 83.058 | 2017 | 83.415 | 2016 | 83.185 | 2015 | 82.873 | 2014 | 82.723 | 2013 | 82.405 | 2012 | 82.15 | 2011 | 82.336 | 2010 | 82.048 | 2009 | 81.766 | 2008 | 81.198 | 2007 | 81.006 | 2006 | 80.522 | 2005 | 80.287 | 2004 | 80.105 | 2003 | 79.992 | 2002 | 79.635 | 2001 | 79.02 | 2000 | 78.552 | 1999 | 78.363 | 1998 | 78.417 | 1997 | 77.958 | 1996 | 77.567 | 1995 | 77.158 | 1994 | 76.526 | 1993 | 76.722 | 1992 | 76.139 | 1991 | 75.478 | 1990 | 75.382 | 1989 | 75.566 | 1988 | 75.273 | 1987 | 75.196 | 1986 | 74.572 | 1985 | 74.862 | 1984 | 74.431 | 1983 | 74.503 | 1982 | 74.496 | 1981 | 74.407 | 1980 | 74.494 | 1979 | 74.422 | 1978 | 74.4 | 1977 | 74.049 | 1976 | 73.742 | 1975 | 73.356 | 1974 | 71.681 | 1973 | 73.168 | 1972 | 73.014 | 1971 | 72.405 | 1970 | 72.084 | 1969 | 71.663 | 1968 | 71.428 | 1967 | 71.285 | 1966 | 70.768 | 1965 | 70.425 | 1964 | 67.364 | 1963 | 66.875 | 1962 | 69.083 | 1961 | 68.519 | 1960 | 67.933 |
|