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| 1966 | 1968 | 1971 | 1972 |
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| 1974 | 1975 | 1976 | 1977 |
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| 1978 | 1979 | 1980 | 1981 |
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| 1982 | 1983 | 1984 | 1985 |
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| 1986 | 1987 | 1988 | 1989 |
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| 1990 | 1991 | 1992 | 1993 |
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| 1995 | 1996 | 1997 | 2000 |
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| 2002 | 2003 | 2005 | 2006 |
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| 2008 | 2009 | 2010 | 2011 |