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| 1974 | 1977a | 1977b | 1978 | 1980 |
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| 1981a | 1981b | 1982 | 1983 | 1984a |
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| 1984b | 1984c | 1985 | 1986 | 1987 |
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| 1988 | 1993 | 1994a | 1994b* | 1997 |
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| 1999 | 2000 | 2001 | 2003 | 2006 |