Nigeria, the largest African country by population (over 182 million in 2015), is nearly equally divided between Christianity and Islam though the exact ratio is uncertain. The majority of Nigerian Muslims are Sunni and are concentrated in the northern area of the country, while Christians dominate in the Middle Belt and south. The Pew Forum in a 2010 report compared reports from several sources. The 1963 Nigerian census found that 36% of the population was Christian, 48% Muslim, and 16% other; the 2008 MEASURE Demographic and Health Survey (DHS) found 53% Christian, 45% Muslim, and 2% other; the 2008 Afrobarometer poll found 56% Christian, 43% Muslim, and 1% other; Pew's own survey found 52% Muslim, 46% Christian, and 1% other.