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LEARN MORE ABOUT .idIn the City of Rockingham, the 'lowest' quartile is the largest group, comprising 38.2% of people with a need for assistance.
Households form the common 'economic unit' in our society. Household Income is one of the most important indicators of socio-economic status. With other data sources, such as Qualifications and Employment, it helps to reveal the City of Rockingham's socio-economic status and economic opportunities for the population reporting a need for assistance.
Household income levels are not comparable over time because of the influences of economic change such as wage level fluctuations and inflation. The income quartile method is a powerful and objective way of looking at income data and in particular, how it is changing. Analysis is simpler due to the breakdown into four simple groups. Quartiles are defined as each containing 25% of all households in Western Australia. This topic shows the proportion of the population reporting a need for assistance falling into these four groups which contain an equal number of households at the state level, but may contain different numbers of people. The comparison is shown for people in the selected benchmark.
A detailed explanation of how Household Income quartiles are calculated and interpreted is available in specific data notes.
Q:
Derived from the Census question:
'What is the total of all wages/salaries, government benefits, pensions, allowances and other income the person usually receives?'
| Household income quartiles | |||||||
|---|---|---|---|---|---|---|---|
| City of Rockingham - Need for assistance | 2021 | 2016 | Change | ||||
| Quartile group | Number | % | Greater Perth | Number | % | Greater Perth | 2016 to 2021 |
| Lowest group | 2,282 | 38.2 | 40.3 | 1,691 | 40.1 | 40.8 | +591 |
| Medium lowest | 1,796 | 30.1 | 28.5 | 1,287 | 30.6 | 28.9 | +509 |
| Medium highest | 1,195 | 20.0 | 17.7 | 743 | 17.6 | 17.1 | +452 |
| Highest group | 694 | 11.6 | 13.5 | 491 | 11.7 | 13.1 | +203 |
| Total people | 5,969 | 100.0 | 100.0 | 4,214 | 100.0 | 100.0 | +1,755 |
| Household income - Quartile group dollar ranges | |||||||
|---|---|---|---|---|---|---|---|
| Calculated from income data for Western Australia | Weekly income by Census year | ||||||
| Household income ranges | 2021 | 2016 | 2011 | 2006 | 2001 | 1996 | 1991 |
| Lowest group | $0 to $888 | $0 to $790 | $0 to $693 | $0 to $565 | $0 to $416 | $0 to $348 | $0 to $305 |
| Medium lowest | $889 to $1,804 | $791 to $1,582 | $694 to $1,405 | $566 to $1,062 | $417 to $783 | $349 to $651 | $306 to $556 |
| Medium highest | $1,805 to $3,032 | $1,583 to $2,614 | $1,406 to $2,507 | $1,063 to $1,774 | $784 to $1,311 | $652 to $1,094 | $557 to $910 |
| Highest group | $3,033 and over | $2,615 and over | $2,508 and over | $1,775 and over | $1,312 and over | $1,095 and over | $911 and over |
Dominant groups
Income quartiles allow us to compare relative income-earning capabilities across time. Analysis of the distribution of people reporting a need for assistance in households by household income quartile in City of Rockingham compared to Greater Perth shows that there was lesser proportion of people in households in the highest income quartile, as well as a lesser proportion in the lowest income quartile.
Emerging groups
The most significant change in City of Rockingham between 2016 and 2021 for people reporting a need for assistance was in the lowest quartile which showed an increase of 591 persons.
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