Figure 2. Self-reported Smoking Prevalence Among Taiwanese Adults by Sex, 1980-2018.

Data are from the Adult Smoking Behaviors Survey 2018, Health Promotion Administration, Taiwan.²⁵ Adult indicates 18 years or older. Before 1997, a smoker was defined as smoking on average 3 or more cigarettes per day; after 1997, a smoker was defined as smoking every day or smoking sometimes in the last 30 days.