Nigeria

Exact population: 170,123,740 (July 2012 est.)
Literacy: Total population: 68%; male: 75.7%; female: 60.6%
Ethnicities: Nigeria, Africa's most populous country, is composed of more than 250 ethnic groups; the following are the most populous and politically influential: Hausa and Fulani 29%, Yoruba 21%, Igbo (Ibo) 18%, Ijaw 10%, Kanuri 4%, Ibibio 3.5%, Tiv 2.5%
Land boundaries: Total: 4,047 km; border countries: Benin 773 km, Cameroon 1,690 km, Chad 87 km, Niger 1,497 km
Terrain: Southern lowlands merge into central hills and plateaus; mountains in southeast, plains in north
Extremes: Lowest point: Atlantic Ocean 0 m; highest point: Chappal Waddi 2,419 m
Imports: China 9.4%, US 8.4%, UK 7.8%, Netherlands 5.9%, France 5.4%, Germany 4.8%, Italy 4% (2004)
Exports: US 47.4%, Brazil 10.7%, Spain 7.1% (2004)
Industries: Crude oil, coal, tin, columbite, palm oil, peanuts, cotton, rubber, wood, hides and skins, textiles, cement and other construction materials, food products, footwear, chemicals, fertilizer, printing, ceramics, steel, small commercial ship construction and repair

Source: CIA World Factbook