"National PDU estimates for Wales for the period 2009/10 were published by the Welsh Government in October 2011 (Welsh Government 2011a; see UK Focal Point Report 2011). Regional differences were noted in the report across Health Board areas. The rate (per 1,000 population) ranged from 3.5 (95% CI 2.4 to 9.6) in the rural Powys area to 14.3 (95% CI 11.0 to 19.0) in the Abertawe Bro Morgannwg University (ABMU)123 area."


UK Focal Point on Drugs, "United Kingdom Drug Situation 2012 Edition: Annual Report to the European Monitoring Centre for Drugs and Drug Addiction (EMCDDA)" (London, England: UK Government, Department of Health, October 31, 2012), p. 85.