Ghana is one of the world's leading exporters of manganese; however, only 279,000 tons were produced in 1992, compared with the all-time high of 638,000 tons in 1974-75. Ghana has reserves exceeding 60 million tons, and considerable rehabilitation of the sector took place in the 1980s. Ghana National Manganese Corporation's mine and the surrounding infrastructure were repaired, helping to raise production from a low of 159,000 tons in 1983 to 284,000 tons in 1989 and 247,000 tons in 1990. The corporation earned US$20 million from its exports in 1991, up from US$11.6 million in 1989 and US$14.2 million in 1990. Approximately US$85 million was also invested by private investors at the newly explored Kwesikrom deposit.
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