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| 1/1978 | 2/1978 | 3/1978 | 4/1978 | 5/1978 | 6/1978 |
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| 7/1978 | 8/1978 | 9/1978 | 10/1978 | ||
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| 1/1979 | 2/1979 | 3/1979 | 4/1979 | 5/1979 | 6/1979 |
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| 7/1979 | 8/1979 | 9/1979 | 10/1979 | ||
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| 1/1980 | 2/1980 | 3/1980 | 4/1980 | 5/1980 | 6/1980 |
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| 7/1980 | 8/1980 | 9/1980 | |||
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| 1/1981 | 2/1981 | 3/1981 | 4/1981 | 5/1981 | 6/1981 |
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| 7/1981 | 8/1981 | 9/1981 | |||
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| 1/1982 | 2/1982 | 3/1982 | 4/1982 | 5/1982 | 6/1982 |
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| 7/1982 | 8/1982 | 9/1982 |