NeoGAF has posted an interesting graph that shows how various Mario games have sold in Japan. See that big Fiery Mario on the far right? That tells you that Japanese gamers have collectively purchased 6,810,000 copies of the original Super Mario Bros. That's probably not surprising, but the runner-up may be. The Japanese apparently love New Super Mario Bros. enough to sent 4,419,952 copies flying off shelves.
Interesting — and laid out in a graphically appealing format. Click the above image for a larger version.
[ Source: NeoGAF ]