1968
1979
1982
March
July
September
October
December
1983
March
April
May
June
July-August
1984
January-February
July-August
November-December
1985
1986
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September-October
November-December
March
July
September
October
December
March
April
May
June
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July-August
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January-February
September-October
November-December