Figure 3.

Trends in snus use by smoking group among men in the Västerbotten Intervention Programme 1990-2006. The lines show the prevalence of snus use in the three age groups 40 years old (blue unbroken line), 50 years old (red broken line) and 60 years old (green dotted line); and by smoking history - never smoked (n = 20,571), previous smoker (n = 15,329) and current smoker (n = 8,401). Lines depict the mean value for the following periods: 1990-1994 (1), 1995-1998 (2), 1999-2002 (3) and 2003-2006 (4).