The adult smoking rate has been declining since the mid 1970’s. This decline is likely to be a result of sustained government tobacco control strategies (eg. high tobacco taxes, advertising bans, mass media public education campaigns and smoke-free environments legislation).
There has also been a significant increase in the number of people who have never smoked.
1 Cancer Institute NSW. Cancer presentation slides. Available at: http://www.cancerinstitute.org.au/cancer-in-nsw/cancer-presentation-slides