These maps show how dangerous illegal drugs flow around the globe

The UN Office on Drugs and Crime released its annual World Drug Report this month, detailing the prevailing trends in global drug cultivation, trafficking, and use.
Relying on surveys and other data, the UN estimated that 1 in 20 adults — a quarter-billion people between the ages of 15 and 64 around the world — used at least one drug in 2014.
That number, the UN notes, doesn't appear to have grown relative to the global population over the last four years, but more than 29 million o