Cocaine remains the world's priciest party drug, according to the just-released 2015 Global Drug Survey, but it's much more expensive in some places than others. The survey, which consists of interviews with 100,000 people worldwide and bills itself as "the world's most comprehensive survey of drug use," shows where you're going to pay out the nose for that stuff that goes up your nose and where you can get it cheaply.

Let's get the cheapest country out of the way first. Outside of the three coca-producing countries of the Andes (Bolivia, Columbia, Peru), the world's cheapest cocaine, at a little over $10 a gram, is in Brazil. That makes sense. Brazil borders all three of those countries and is also a key transshipment route for marching powder headed to markets across the Atlantic.

And although the survey doesn't mention the producing countries, this writer can report that it's even cheaper there. Eight-balls (3.5 grams) of cocaine were going for about $14 (less than $5 a gram) at beachfront hotels in the Colombian Caribbean resort city of Cartagena just a few short years ago, and there is little reason to think that anything has changed.

It's a different story elsewhere. Here are the world's most expensive countries for cocaine, grouped into tiers: