Figure 5

Standardized incidence estimates by the GIF method. Standardized estimates of incidence of regular heroin use per 1,000 population and its approximation by using year of birth or 5-year age group categories from annual tables of all 26 cantons of Switzerland, 1970–2005. Gaps in lines derive from missing annual tables in the National Statistic of Methadone Treatment between 1999 and 2006 [7].