Year | Value | 2021 | 81.155 | 2020 | 81.058 | 2019 | 80.816 | 2018 | 80.637 | 2017 | 80.321 | 2016 | 80.053 | 2015 | 79.772 | 2014 | 79.499 | 2013 | 79.223 | 2012 | 78.983 | 2011 | 78.644 | 2010 | 78.326 | 2009 | 78.066 | 2008 | 77.562 | 2007 | 77.492 | 2006 | 77.167 | 2005 | 76.819 | 2004 | 76.433 | 2003 | 76.044 | 2002 | 75.64 | 2001 | 75.258 | 2000 | 74.189 | 1999 | 73.582 | 1998 | 73.587 | 1997 | 72.915 | 1996 | 72.503 | 1995 | 72.308 | 1994 | 71.736 | 1993 | 71.548 | 1992 | 70.965 | 1991 | 70.333 | 1990 | 70.424 | 1989 | 70.331 | 1988 | 70.094 | 1987 | 69.795 | 1986 | 69.411 | 1985 | 69.06 | 1984 | 68.687 | 1983 | 68.287 | 1982 | 67.807 | 1981 | 67.305 | 1980 | 66.719 | 1979 | 66.133 | 1978 | 65.463 | 1977 | 64.747 | 1976 | 63.97 | 1975 | 63.084 | 1974 | 62.282 | 1973 | 61.382 | 1972 | 60.367 | 1971 | 59.487 | 1970 | 58.617 | 1969 | 57.774 | 1968 | 57.123 | 1967 | 56.466 | 1966 | 55.786 | 1965 | 55.135 | 1964 | 54.337 | 1963 | 53.608 | 1962 | 53.04 | 1961 | 42.148 | 1960 | 34.615 |
|