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In page Johannesburg:
"Johannesburg is the economic and financial hub of South Africa, producing 16% of South Africa's gross domestic product, and accounts for 40% of Gauteng's economic activity.[citation needed] In a 2008 survey conducted by Mastercard, Johannesburg ranked 47 out of 50 top cities in the world as a worldwide centre of commerce (the only city in Africa).[1]
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