The majority of Benin's 11,485,000 inhabitants live in the south of the country. The population is young, with a life expectancy of 62 years. About 42 African ethnic groups live in this country, including the Yoruba in the southeast (migrated from what is now Nigeria in the 12th century); the Dendi in the north-central area (who came from Mali in the 16th century); the Bariba and the Fula in the northeast; the Betammaribe and the Somba in the Atakora Mountains; the Fon in the area around Abomey in the South Central and the Mina, Xueda, and Aja (who came from Togo) on the coast.