ocr: Strengths One of world's top oil producers at 1.9 million b/d. Vast reserves ofnatural gas, still only partly exploited. Almost self-suthicient in food. Strong entrepreneurial class. Large domestic market of 90 million people. Wealaesses Uver-dependence since the 1970s on oil, which accounts for 90% of export earnings and 80% of government revenue, and encourages massive state inethiciency. Advantages of a large domestic market mitigated by low per capita purchasing power and high unit transport costs. Entrepreneurs focus on trade rather than production. Only cocoa remains of. - Nigeria's trad ...