Read this: The 2011 World Wealth Report ranks economic activity in New Delhi at 39, but overall the capital is ranked at 37, above cities like Jakarta and Johannesburg. New Delhi with Beijing shares the top position as the most targeted emerging markets retail destination among Asia-Pacific markets.

In which year was New Delhi ranked 39th in economic activity by the World Wealth Report?
What is the answer? (If it cannot be answered, return "unanswerable")
2011