"In total, the number of problematic drug users in Sweden was estimated at a rounded of figure of 29,500. This number is not directly comparable to the figures previously derived in Sweden due to differences in both the data sources and the methods used. The national estimate relating to population was 3.2 with the 'all ages' denominator and 4.9 with the 15-64 years of age denominator (see Standard table 7 and 8 for details)."

Source

Swedish National Institute of Public Health. "2012 National Report (2011 data) To the EMCDDA by the Reitox National Focal Point: Sweden: New Development, Trends and in-depth information on selected issues." Östersund: Swedish National Institute of Public Health, 2012, p. 49.
http://www.emcdda.europa.eu/h…
http://www.emcdda.europa.eu/a…