African slaves in 19th-century rural Egypt

By all accounts, the population of enslaved Africans in Egypt increased in the 19th century compared to earlier times. An estimated 5,000 African slaves were imported annually during the 1840s and 1850s, and as few as 1,000 in 1860. However, during the cotton boom (1861-64), some 25,000 to 30,000 slaves were brought to Egypt each year to satisfy the demand for labor generated by the rapid expansion of cotton cultivation.