Simplify the following text for a Grade 9 native English-speaking person.
Original: Its crude oil production comes primarily from Libya , Egypt , Nigeria , the Congo , the North Sea , and Angola , with smaller amounts of crude oil production in Tunisia and in the United States .
Simplified: Its crude oil production comes primarily from Libya , Egypt , Nigeria , the Congo , the North Sea , and Angola . Smaller amounts of crude oil production come from Tunisia and in the United States .