Actually, this seems like a terrible visualization because it's taken out of context, and was originally presented in a magazine. You can see where the article text would go, the United States label is hidden away near the binding and far in the upper margin, and due to expected info location/"eye drift" one doesn't find the U.S. at first.

Wish I could provide a scan of the page as it went to print, but I only saw it while visiting family. Regardless, the presentation is clearly to cause that double take rather than just to efficiently convey the information.