Trends in world drug markets -- Overview -- Opium/heroin market -- Coca/cocaine market -- Cannabis market -- Amphetamine-type stimulants market -- A century of international drug control -- Origins : the development of the opium problem in China -- The foundation of an international drug control system -- Drug control under the League of Nations, 1920-1945 -- Development of the present system under the United Nations -- Achievements and unintended consequences of the international drug control system -- Statistical annex -- Production -- Seizures -- Seizures of illicit laboratories -- Prices -- Consumption -- Methodology