Exact population: 3,887,886 (July 2011 est.) Literacy: Total population: 57.5%; male: 73.3%; female: 41.6% Ethnicities: Indigenous African tribes 95% (including Kpelle, Bassa, Gio, Kru, Grebo, Mano, Krahn, Gola, Gbandi, Loma, Kissi, Vai, Dei, Bella, Mandingo, and Mende), Americo-Liberians 2.5% (descendants of immigrants from the US who had been slaves), Congo People 2.5% (descendants of immigrants from the Caribbean who had been slaves) Land boundaries: Total: 1,585 km; border countries: Guinea 563 km, Cote d'Ivoire 716 km, Sierra Leone 306 km Terrain: Mostly flat to rolling coastal plains rising to rolling plateau and low mountains in northeast Extremes: Lowest point: Atlantic Ocean 0 m; highest point: Mount Wuteve 1,380 m Imports: South Korea 38.8%, Japan 21.2%, Singapore 12.2%, Croatia 5.3%, Germany 4.2% (2004) Exports: Denmark 28.1%, Germany 18%, Poland 13.6%, US 8.5%, Greece 7.6%, Thailand 4.8% (2004) Industries: Rubber processing, palm oil processing, timber, diamonds