In 1991, there were some 24,000 Indians belonging to the Santhal community who identified explicitly as adherents of the Santhal traditional religion Sarnaism in the Indian census, as opposed to 300,000 who identified as Christians. Among the Munda people and Oraons of Bihar, about 25 % of the population are Christian. Among the Kharia people of Bihar (population about 130,000), about 60 % are Christians. Tribal groups in the Himalayas were similarly affected by both Hinduism and Buddhism in the late 20th century. The small hunting-and-gathering groups in the union territory of the Andaman and Nicobar Islands have also been under severe pressure of cultural assimilation.