Global Opioid Use Rates, 2011
"The use of opioids (heroin, opium and prescription opioids) has increased in Asia since 2009, particularly in East, South-East, Central and South-West Asia. While reliable data do not exist for most parts of Africa, experts report an increase in the use of opioids there. North America 3.9 per cent), Oceania (3.0 per cent), the Near and Middle
East/South-West Asia (1.9 per cent) and East and South-Eastern Europe (1.2 per cent) show a prevalence of opioid use that is higher than the global average. The use of opiates (heroin and opium) has remained stable in some regions, nevertheless, a high prevalence is reported in the Near and Middle East/South-West Asia (1.2 per cent), primarily in Afghanistan, Iran (Islamic Republic of ) and Pakistan, as well as Central Asia (0.8 per cent), Eastern and South-Eastern Europe (0.8 per cent), North America (0.5 per cent) and West and Central Africa (0.4 per cent)."
UNODC, World Drug Report 2013 (United Nations publication, Sales No. E.13.XI.6), p. 2.