Guinea Bissau at my current, stubborn to address weight.
Interestingly they are slightly skinnier than folks in The Gambia. Having been to The Gambia I am left wondering where all the monstrously fat people are, because the vast majority were paper thin.
I'm disappointed that the Brits are fatter than the Greeks, but I suppose that the swarms in ASDA-ville explain it.
(I've just checked against my target weight. Another 4lb off where I am and I reach the standard for Somalia!)
Edited: 19/07/2012 at 00:01