Illicit drugs consumption seems to be relatively stable around the world, except in developing countries, where it seems to be on the rise. Although the total area for the cultivation of the coca leaf has decreased 33% since 2000, 18% decrease between 2007 and 2010, the number of deaths from heroin and cocaine abuse is estimated at 200 thousand per year.
This map shows cocaine consumption around the world, the richest countries being among the top consumers. Complete details can be found at: United Nations Office of Drug and Crime (UNODC) – World Drug Report 2012