Nigeria's economy is heavily dependent on the oil fields along the nation's coast. The petroleum sector accounts for 30 percent of the nation's $133 billion economy and 80 percent of the government's revenues. Much of the petroleum is controlled by Western oil companies.
According to a 1992 estimate, 54 percent of the population works in agriculture, 19 percent in industrial and service sectors, 15 percent in government. Approximately 28 percent are unemployed.
source: CIA World Fact Book