America is near the top of the list:
The Pacific island of Palau reports the highest rate: nearly a quarter of people aged 15 to 64 smoked pot in the past year. Italians and Americans also like to get high, with rates of 14.6% and 14.1% respectively. In Uruguay, where plans to legalise cannabis are being mooted, the rate is 5.6%. While consumption is stable or falling in much of the developed world, it is rising in parts of Asia and Africa.
More info on drug use of all types here.
The Dish 