Figure 1

Trends in prevalence of daily and occasional smoking among 20–64-year-olds. Prevalence of daily smoking varied markedly between genders during the whole study period. In 1990, 47.4% of men and 15.2% of women were daily smokers. In 2010, 37.9% of men and 19.0% of women were daily smokers. The years 1990–2010 showed decreasing trend in daily smoking among men (p < 0.01). During the study period, daily smoking among women increased slightly, but this trend was not statistically significant. Occasional smoking was similar and stable among men and women during the whole study period. In 1990, 8.4% of men and 9.4% of women and in 2010, 8.8% of men and 7.2% of women were occasional smokers.