Other commercial products include rubber, palm products, and sugarcane. Subsistence crops include plantains, sweet potatoes, cassava, corn, and millet. Livestock raising is important in the Adamawa Massif region. In the early 1990s the livestock population included 4.7 million cattle, 3.6 million goats, 1.4 million pigs, and 3.6 million sheep. Forestry and Fishing Timber is traditionally one of Cameroon's most valuable exports, consisting mainly of mahogany, ebony, and teak.
Fishing includes freshwater subsistence activity and deep-sea commercial fishing from Douala.
About 78,000 metric tons of fish are caught annually. Offshore petroleum exploitation began in the late 1970s, and an oil refinery has been built. Cameroon's output of crude petroleum, mostly for export, exceeded 60 million barrels a year in the early 1990s. Small amounts of tin concentrates are also produced. The unit of currency of Cameroon is the CFA franc, consisting of 100 centimes.