From 1982 to 2000: "Smoking" refers to cigarette smoking
From 2002/03 to 2012: "Smoking" refers to the use of all forms of tobacco, including cigarette, cigar, hand rolled cigarettes, waterpipe and pipe-smoking
From 2015 to 2017: "Smoking" refers to the use of all forms of tobacco and related products, including cigarette, e-cigarette, cigar, hand rolled cigarette, waterpipe and pipe-smoking
In 2019: "Smoking" refers to the use of all forms of tobacco and related products, including cigarette, e-cigarette, heated tobacco product, cigar, hand rolled cigarette, waterpipe and pipe-smoking
From 2021: "Smoking" refers to the use of all forms of tobacco and related products, including cigarette, e-cigarette, heated tobacco product, cigar, hand rolled cigarette, waterpipe, pipe-smoking and snuff/snus
*The household surveys released by the Census and Statistics Department did not provide the data on current smoking prevalence in 1996 and 1998. The relevant figures shown in the above chart are for chart drawing purposes only.