1947 | 1,71 |
1948 | 1,64 |
1949 | 1,62 |
1950 | 1,61 |
1951 | 1,68 |
1952 | 1,70 |
1953 | 1,74 |
1954 | 1,76 |
1955 | 1,71 |
1956 | 1,78 |
1957 | 1,77 |
1958 | 1,74 |
1959 | 1,73 |
1960 | 1,72 |
1961 | 1,68 |
1962 | 1,71 |
1963 | 1,83 |
1964 | 1,89 |
1965 | 1,94 |
1966 | 1,93 |
1967 | 1,96 |
1968 | 1,93 |
1969 | 1,90 |
1970 | 1,86 |
1971 | 1,81 |
1972 | 1,78 |
1973 | 1,74 |
1974 | 1,80 |
1975 | 1,90 |
1976 | 1,92 |
1977 | 1,99 |
1978 | 2,07 |
1979 | 2,10 |
1980 | 2,10 |
1981 | 2,32 |
1982 | 2,42 |
1983 | 2,56 |
1984 | 2,49 |
1985 | 2,38 |
1986 | 2,33 |
1987 | 2,34 |
1988 | 2,43 |
1989 | 2,44 |
1990 | 2,61 |
1991 | 2,63 |
1992 | 2,69 |
1993 | 2,61 |
1994 | 2,53 |
1995 | 2,51 |
1996 | 2,52 |
1997 | 2,51 |
1998 | 2,56 |
1999 | 2,60 |
2000 | 2,55 |
2001 | 2,57 |
2002 | 2,54 |
2003 | 2,54 |
2004 | 2,45 |
2005 | 2,41 |
2006 | 2,36 |
2007 | 2,28 |
2008 | 2,23 |
2009 | 2,29 |
2010 | 2,20 |
2011 | 2,19 |
2012 | 2,22 |
2013 | 2,22 |
2014 | 2,26 |
2015 | 2,36 |
2016 | 2,43 |
2017 | 2,39 |
2018 | 2,34 |
2019 | 2,32 |
2020 | 2,39 |
2021 | 2,30 |
2022 | 2,25 |
2023 | 2,19 |
2024 | 2,15 |
  
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