"Elsewhere in Southeast Asia, Muslims enslaved Hindus and Animists, and even fellow Muslims, from the thirteenth-century. Bali exported around 100,000 Hindu slaves from 1620 to 1830, and South Sulawesi exported another 100,000 between 1660 and 1810, mainly Muslims. Quite a few were acquired by Europeans and Chinese. Supplies of Animists from Nias Island to Aceh from 1790 to 1900 may have amounted to around 50,000, while some 12,000 Toraja Animists were obtained in South Sulawesi from 1880 to 1905. There are no figures for similar local trades from Animist uplands to Muslim lowlands, notably in Sumatra, Malaya, and Borneo. The proportion of slaves in nineteenth-century Muslim societies varied widely. Rare in Java in the 1810s, they accounted for 6 per cent in an 1879 census of the Malay sultanate of Perak, about a third in villages on the eastern edge of West Sumatra in the 1860s, 30 per cent in the Muslim zone of North Sulawesi, and two thirds or more in part of North Borneo in the 1880s."