"The total quantity of heroin seized globally reached a record high in 2016, while the quantities of opium and morphine seized reached the second highest level ever reported. The largest quantities of opiates seized were of opium (658 tons), followed by seizures of heroin (91 tons) and morphine (65 tons). Overall seizures of opiates, expressed in heroin equivalents, increased by almost 50 per cent from 2015 to 2016, of which the quantity of heroin seized exceeded that of opium and morphine.

"As most seizures of opiates are made in, or close to, the main opium production areas, Asia, which is responsible for more than 90 per cent of global illicit opium production, accounted for 86 per cent of the total quantity of heroin and morphine seized in 2016. This is primarily a reflection of the increasing concentration of opium production in Afghanistan and the consequent increase in seizures by neighbouring countries.

"Similarly to the distribution of heroin and morphine seizures, overall, 90 per cent of the total quantity of opiates (including opium), expressed in heroin equivalent, was seized in Asia, the vast majority in the Near and Middle East/South-West Asia (83 per cent), while 6 per cent was seized in East and South- East Asia."


World Drug Report 2018. United Nations publication, Sales No. E.18.XI.9.