Year | Value | 2021 | 70.078 | 2020 | 70.594 | 2019 | 70.234 | 2018 | 69.572 | 2017 | 69.468 | 2016 | 69.346 | 2015 | 68.724 | 2014 | 68.507 | 2013 | 67.663 | 2012 | 67.368 | 2011 | 66.591 | 2010 | 66.156 | 2009 | 65.438 | 2008 | 64.593 | 2007 | 64.286 | 2006 | 63.717 | 2005 | 63.149 | 2004 | 62.399 | 2003 | 62.013 | 2002 | 61.293 | 2001 | 60.755 | 2000 | 59.941 | 1999 | 59.342 | 1998 | 59.317 | 1997 | 58.901 | 1996 | 58.397 | 1995 | 57.857 | 1994 | 57.179 | 1993 | 56.864 | 1992 | 56.349 | 1991 | 55.783 | 1990 | 55.079 | 1989 | 54.579 | 1988 | 53.929 | 1987 | 53.224 | 1986 | 52.702 | 1985 | 52.079 | 1984 | 51.484 | 1983 | 50.843 | 1982 | 50.253 | 1981 | 49.697 | 1980 | 49.045 | 1979 | 48.096 | 1978 | 47.494 | 1977 | 47.188 | 1976 | 46.8 | 1975 | 46.999 | 1974 | 46.602 | 1973 | 46.478 | 1972 | 46.267 | 1971 | 46.119 | 1970 | 45.709 | 1969 | 45.361 | 1968 | 45.225 | 1967 | 44.798 | 1966 | 44.324 | 1965 | 44.329 | 1964 | 43.885 | 1963 | 43.545 | 1962 | 43.286 | 1961 | 42.861 | 1960 | 42.511 |
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