Although much of Zanzibar's native population came from the mainland, one group known as Shirazis traces its origins to the island's early Persian settlers. Non-Africans residing on the mainland and Zanzibar account for 1 percent of the total population. The Asian community, including Hindus, Sikhs, Shi'a and Sunni Muslims, Parsis, and Goans, has declined by 50 percent in the 2000s and early 2010s to 50,000 on the mainland and 4,000 on Zanzibar. An estimated 70,000 Arabs and 20,000 Europeans (90 percent of which are from the British diaspora) reside in Tanzania. Over 100,000 people living in Tanzania are of Asian or European ancestry.