Bahraini citizens of Muslim faith belong to the Shi'a and Sunni branches of Islam. The last official census (1941) to include sectarian identification reported 52% (88,298 citizens) as Shia and 48% as Sunni of the Muslim population. Unofficial sources, such as the Library of Congress Country Studies, and "The New York Times", estimate sectarian identification to be approximately 45% Sunni and 55% Shia. An official Bahraini document revealed that 51% of the country's citizens are Sunnis, while the Shiite population has declined to 49% of the Muslim population.