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| 1980 | 1982a | 1982b* | 1985 | 1987 |
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| 1988 | 1991 | 1993 | 1994 | 1996a |
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| 1996b | 1997 | 1998a | 1998b* | 1999 |
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| 2000* | 2001 | 2003 | 2005a | 2005b |
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| 2007 | 2008 | |||