| 1981 | 1982 |
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| 1982 |
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| 1984 | 1984 |
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| 1985 | 1986 |
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| 1987 | 1989 |
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| 1990 | 1995 |
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| 1999 | 2000 |
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| 2000 | 2001 |
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| 2003 | |
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| 2006 | 2006 |
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| 2006 | 2007 |
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