Figure 2

Trends in daily (thick lines) and occasional (thin lines) smoking by education among 20–64 year-olds. Compared to lower educated men, daily smoking was less common among men with higher education in 1990–2010, but among women since 2000. During the study period, prevalence of daily smoking decreased significantly from 48.7% to 27.1% (p < 0.01) among men with higher and from 55.5% to 48.2% (p < 0.01) among men with secondary education. Daily smoking among men with basic education decreased slightly from 62.5% to 56.6%, but the changes were not statistically significant. During the study period, the prevalence of daily smoking decreased significantly from 21.2% to 17.4% (p < 0.01) among women with higher education and doubled from 19.7% to 40.0% (p < 0.01)] among women with basic education. There were no significant changes in daily smoking among women with secondary education in 1990–2010. No significant trends over time were established in occasional smoking by education among men and women.