6. Sudan: GDP – $112.552 billion
More than once, we have mentioned oil and gas as the main source of income for countries on this list. Sudan also falls into that category but in a more diverse way. It depends on oil but with a third of its GDP contributed by agriculture. Cotton and peanuts constitute its major agricultural exports. You may not notice a “Made in Sudan” tag on the shirt you buy in Khartoum but cotton from Sudan has fueled the textile industry in many parts of the world.