The ABS provides population data on a range of health measures. Smoking specific information is rare.
Suggested starting point - go to Themes > people > health. From there you can look at a list of all ABS health related publications.
Topics of interest include mortality data (eg deaths, causes of death), National Health Survey results, Indigenous health, mental health papers, etc.
Browse AIHW publications for information on more general topics. Likely sources of information include Australia's Health, Australia's young people, their health and wellbeing 1999, Australian health trends, National Health Priority Areas etc.
Particularly useful are