That 45% figure in the article is wrong; Ghana produces about 18% of the world's production. They hold a lot of the world market because they have low prices.

That 45% figure in the article is wrong; Ghana produces about 18% of the world's production. They hold a lot of the world market because they have low prices. If they raise their price, their market share will drop, and other countries could move in and take their position. There's simple market economics at play.