See data table below with 95% confidence intervals.Quitter percentage varied significantly by age group,63 increasing dramatically with increasing age, as expected given that older smokers have had more time to become former smokers. In 2017, while just 6% of ever-smokers aged 15-19 were former smokers when surveyed, nearly three-quarters of ever-smokers aged 45 and older had quit (Figure 6.5).

The same pattern of increasing quitter percentage with age was observed in all years since 1999 (Figure 6.6). Between 1999 and 2017, quitter percentages appear to have generally increased among smokers over age 25. Quitter percentages were lower and more variable among younger smokers.

 
See data table below with 95% confidence intervals.