The country has an area of 8,450 square miles and a population of 660,000. More than 99 percent of the population is Sunni Muslim. There are a small number of Roman Catholics, Protestants, Copts, Ethiopian Orthodox, Greek Orthodox, Jehovah's Witnesses, Hindus, and Baha'is. Foreign-born Djiboutians, as well as many expatriate residents, are often members of these denominations. Citizens are officially considered Muslims if they do not specifically identify with another faith.