Table : TABLE 10.1 Estimated Magnitude of Trans-Saharan Slave Trade, 650–1500

YEARS	ANNUAL AVERAGE OF SLAVES TRADED	TOTAL
650–800	1,000	150,000
800–900	3,000	300,000
900–1100	8,700	1,740,000
1100–1400	5,500	1,650,000
1400–1500	4,300	430,000
Source: R. A. Austen, “The Trans-Saharan Slave Trade: A Tentative Census,” in The Uncommon Market: Essays in the Economic History of the Atlantic Slave Trade, ed. H. A. Gemery and J. S. Hogendorn (New York: Academic Press, 1979). Used with permission.