Algeria
Islam is the predominant religion in Algeria, with its adherents, mostly Sunnis, accounting for 99% of the population according to a 2012 CIA World Factbook estimate, and 97.9% according to Pew Research in 2010. There are about 150,000 Ibadis in the M'zab Valley in the region of Ghardaia.
Christianity in Algeria
Conversions to Christianity have been most common in Kabylie, especially in the wilaya of Tizi-Ouzou. In Tizi-Ouzou, the proportion of Christians has been estimated to be between 1% and 5%. Christians have at times been subjected to religiously motivated attacks. In 1996, Pierre Claverie, bishop of Oran, was assassinated by terrorists. This murder occurred soon after that of seven monks of the Trappistes of Tibérine, and of six nuns. This terrorist act was part of a general trend of violence during the Algerian Civil War in the 1990s, commonly known as the Black Decade. During this time, between 100,000 and 200,000 Algerians lost their lives.