It's an interesting layout but has an annoying feature I've noticed in similar infographics. The division looks like it should be proportional to occurrences, but it is not. EDIT: appears i was bitten by how I was viewing it originally - downloaded the graphic and it appears to be roughly proportional with areas (i.e. I didn't find more than 10% error) mea culpa!
What makes you think it’s not proportional?