The rest of the people are nearly all Sunni Muslims. In the early 1990s the annual enrollment in nearly 1800 primary schools was about 315,150, and some 250 secondary, vocational, and teacher-training schools were attended by about 79,450 students. Agriculture and mining are the most important economic activities. The bulk of the population is engaged in subsistence farming. Plantation agriculture is significant only in the coastal region.
Mining is important to the country's export trade.
Some 420,000 metric tons were produced annually in the early 1990s. Other crops grown for domestic consumption include cassava, millet, sorghum, peanuts, and sugar. Cattle, goats, and sheep are raised, and the fishing industry is of modest importance. Mining Gem and industrial diamonds rank among the leading mineral products of Sierra Leone. In the early 1990s some 200,300 carats were produced annually.