The ABS has details on it.

A quick search brought up this. https://www.tobaccoinaustralia.org.au/chapter-17-economics/17-2-the-costs-of-smoking

Collins and Lapsley estimated that in 2004–05 the total cost of smoking in Australia was $31.5 billion (Table 17.2.1), an increase of 23.5% from the 1998–99 estimate (adjusted to 2004–05 prices).5 This increase occurred despite steady falls in smoking prevalence since the mid-1970s, and a decline in the annual number of deaths attributable to tobacco use from 19 429 in 1998–99 to 14 901 in 2004–05. Costs did not decrease because the impact of the previous decades of tobacco use was still being observed in 2004–05. Collins and Lapsley predicted that 'as the lagged effects work their way through the system, and assuming that smoking prevalence continues to decline, real smoking costs (adjusting for the effects of inflation) should eventually fall very significantly'.