The religious affiliation in the country was estimated by the Pew Forum in 2010 as 99% Muslim, with all remaining groups accounting for less than 1% of the population. Of those affiliated with Islam, virtually all are Sunni Muslims, with Shia Muslims accounting for less than 0.1%. Despite Moroccans being affiliated with Islam, almost 15% nonetheless describe themselves as non-religious according to a 2019 survey conducted for the BBC by the research network Arab Barometer.