How do suicide rates vary across states and territories?
From 1979 to 2021, age-standardised suicide rates based on death registrations:
- tended to be lower for New South Wales and Victoria than the overall Australian suicide rate while rates for all other jurisdictions tended to be higher
- tended to be highest in the Northern Territory (ranging from 14.2 in 2013 to 29.8 deaths per 100,000 population in 2007); however, it was one of the jurisdictions with the lowest number of deaths by suicide (from a high of 56 in 2014 to a low of 7 in 1982).
In 2021:
- the age-standardised suicide rate ranged from 10.1 per 100,000 population in Victoria to 18.4 per 100,000 in the Northern Territory.
Age-standardised suicide rates allow for comparisons between states and territories by adjusting for differences in age structures and population size. Rates fluctuate over time—particularly in the smaller jurisdictions—due to the small number of deaths by suicide that are registered each year. Caution is advised when comparing state and territory data. Differences in coronial processes, data processing or coding practices should also be taken into consideration when comparing data across jurisdictions and over time.
In 1979, the highest number of deaths by suicide was in:
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New South Wales (539 deaths), followed by Victoria (462), Queensland (296), South Australia (178) and Western Australia (116).
By 2021, the highest number of deaths by suicide was in:
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New South Wales (880), followed by Queensland (783), Victoria (675), Western Australia (389) and South Australia (226).
However, it should be noted that New South Wales and Victoria have the largest populations in Australia and the populations of both Queensland and Western Australia increased considerably from 1979 to 2021.
What is the effect of reporting deaths by suicide by year of occurrence?
The data for age-standardised rates and number of suicide deaths are broadly similar when analysed by year of death or year of registration. Minor differences arise due to the elapsed time prior to registration with recent years showing some differences due to incomplete coronial processes and registrations.