User: How large is South Africa's economy?
Assistant: South Africa has the third largest economy in Africa, and is the second wealthiest country on the continent, and the wealthiest by private wealth ($651 billion), followed by Egypt with $307 billion and Nigeria with $228 billion. South Africa's economy is mainly formal, with only 15% of jobs in the informal sector, compared with 50% in Brazil and India who have a thriving informal economy.