Around 200 million people have used drugs at some point in the last 12 months. This was one of the findings presented June 29 in the 2005 World Drug Report, issued by the U.N. Office on Drugs and Crime.

The UNODC report, which covers data up to 2003, estimates that there are 160 million marijuana users. The number of those using amphetamines and ecstasy, termed as ATS users by the report, is 26 million and 8 million, respectively. The number of opiate users is estimated to be around 16 million. Cocaine users number almost 14 million.