If you're targeting billionaires or other ultra-high net worth individuals in your sales or marketing, you might want to know where to find them. In turns out that Europe has the most with North America and Asia following closely behind. Not surprisingly, many live in large cities with New York, Moscow (which was a bit of a surprise to me) and Hong Kong leading the way. Asian and developing world billionaires are more likely to be in large cities than North American billionaires.
The Marimekko chart is a great way to summarize the location of the 2,325 billionaires. You can identify the cities with the largest numbers, which could be useful for retail location selection. You can also look at the relative geographic dispersion by region and the concentration within a region in the top 10 cities. The annotated label feature in Mekko Graphics allows you to identify the cities with smaller numbers of billionaires without adding a legend. Here's the chart in SlideShare if you'd like to download it: