Some 98% of the people are Bengalis (or Banglas). About 12 tribes inhabiting the Chittagong Hill Tracts, collectively totaling less than one million people, are ethnically distinct from the Bengalis; their facial features and language are closer to the Burmese. The government's policy of resettling Bengalis in the region, which is much less densely populated than Bangladesh as a whole, led to racial and religious disturbances and a small-scale tribal insurgency in the early 1980s. About 250,000 of the national population consists of Biharis, non-Bengali Muslims who migrated from India to what was then East Pakistan after the partition of the subcontinent in 1947. In the coastal areas of Bangladesh, Arab, Portuguese, and Dutch settlers have gradually come to adopt the Bengali life-style.