Islam was introduced to West Africa in the 11th century and remains the predominant religion in much of the region. An estimated 90% of Malians are Muslim (mostly Sunni), approximately 5% are Christian (about two-thirds Roman Catholic and one-third Protestant) and the remaining 5% adhere to traditional African religions such as the Dogon religion. Atheism and agnosticism are believed to be rare among Malians, most of whom practice their religion daily.