I'm none-too-keen on economists with their pseudo-scientific claims and intellectual "rigour", but this graph caught my eye, showing the time is takes a man to earn enough to buy a pint across the world.
Shows two things really. That some places are dead cheap to buy beer and other in other places people earn a lot of money (comparitively). Where the two intersect (U.S.A! U.S.A!), they can afford to get drunker. (I'm paraphrasing there).
No notes, conditions or anything else. In fact, I'm not certain why I'm publicising them, but hey-ho.