(AOL Black Voices) — Here’s more proof that you can still make a buck during an economic downturn. At least you can if you’re already rich. According to Reuters, the world’s richest individuals got even wealthier in 2009, amid one of the worst economic recessions of our lifetime. Collectively, the world’s ranks of millionaires grew 17 percent to 10 million people, whose aggregate wealth jumped 19 percent to $39 trillion, based on a Merrill Lynch-Capgemini world-wealth report.