The number of High Net Worth Individuals (HNWIs) in the UAE dropped almost 20 percent last year. The growth levels in the Middle East were the lowest of all the regions surveyed in the report and Amir Sadr, head of Middle East Merrill Lynch Wealth Management, said this was evidence that the region had underperformed in 2009. A new study by the Boston Consulting Group (BCG) found that millionaire households owned more than half of the wealth in the Middle East and Africa region in 2009.