In 2009, approximately 249,000 Muslims were reported by the Office of Statistics to be members of Mosques and Islamic religious organizations in Berlin, while in 2016, the newspaper ''Der Tagesspiegel'' estimated that about 350,000 Muslims observed Ramadan in Berlin. In 2019, about 437,000 registered residents, 11.6% of the total, reported having a migration background from one of the Member states of the Organization of Islamic Cooperation. Between 1992 and 2011 the Muslim population almost doubled.