Africa has more than 80% of the world's total dromedary population; it occurs in almost every desert zone in the northern part of the continent. The Sahel marks the southern extreme of its range, where the annual rainfall is around . The Horn of Africa has nearly 35% of the world's dromedaries; most of the region's stock is in Somalia, followed by Sudan, Eritrea, and Ethiopia (as of the early 2000s). According to the Yearbook of the Food and Agriculture Organization (FAO) for 1984, eastern Africa had about 10 million dromedaries, the largest population of Africa. Western Africa followed with 2.14 million, while northern Africa had nearly 0.76 million. Populations in Africa increased by 16% from 1994 to 2005.