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LEARN MORE ABOUT .idIn 2021, the largest age group in Rockbank was 30 to 34 year olds. The group that changed the most since 2016 was 30 to 34 year olds, increasing by 157 people.
The Age Structure of Rockbank provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Rockbank's residential role and function and how it is likely to change in the future.
Five year age groups present a classic age profile of the population. Each age group covers exactly five years, which enables direct comparison between each group.
To get a more complete picture Rockbank's Age Structure should be viewed in conjunction with Household Types and Dwelling Types.
Q:
Derived from the Census question:
'What is the person's date of birth or age?'
| Age structure - Five year age groups | |||||||
|---|---|---|---|---|---|---|---|
| Rockbank - Total females (Usual residence) | 2021 | 2016 | Change | ||||
| Five year age groups (years) | Number | % | Kurunjang % | Number | % | Kurunjang % | 2016 to 2021 |
| 0 to 4 | 141 | 10.8 | 7.6 | 30 | 5.3 | 7.7 | +111 |
| 5 to 9 | 99 | 7.7 | 7.5 | 26 | 4.6 | 8.5 | +74 |
| 10 to 14 | 67 | 5.2 | 7.6 | 30 | 5.3 | 6.4 | +37 |
| 15 to 19 | 52 | 4.0 | 6.2 | 24 | 4.2 | 6.4 | +28 |
| 20 to 24 | 84 | 6.5 | 6.0 | 41 | 7.3 | 6.7 | +43 |
| 25 to 29 | 156 | 12.0 | 7.4 | 35 | 6.1 | 8.3 | +121 |
| 30 to 34 | 195 | 15.0 | 8.1 | 37 | 6.6 | 8.2 | +157 |
| 35 to 39 | 136 | 10.5 | 7.6 | 27 | 4.8 | 7.3 | +109 |
| 40 to 44 | 57 | 4.5 | 7.1 | 41 | 7.3 | 6.9 | +16 |
| 45 to 49 | 56 | 4.3 | 6.2 | 53 | 9.3 | 6.8 | +3 |
| 50 to 54 | 68 | 5.3 | 6.3 | 50 | 8.8 | 6.6 | +18 |
| 55 to 59 | 52 | 4.0 | 6.3 | 50 | 8.7 | 6.0 | +2 |
| 60 to 64 | 45 | 3.5 | 5.1 | 46 | 8.1 | 5.3 | -1 |
| 65 to 69 | 40 | 3.1 | 4.2 | 34 | 6.1 | 3.5 | +6 |
| 70 to 74 | 25 | 2.0 | 3.0 | 28 | 5.0 | 2.1 | -3 |
| 75 to 79 | 17 | 1.4 | 2.0 | 10 | 1.8 | 1.3 | +7 |
| 80 to 84 | 4 | 0.3 | 1.0 | 3 | 0.6 | 0.9 | 0 |
| 85 and over | 0 | -- | 1.1 | 1 | 0.2 | 1.2 | -1 |
| Total population | 1,301 | 100.0 | 100.0 | 574 | 100.0 | 100.0 | +727 |
Dominant groups
Analysis of the female five year age groups of Rockbank in 2021 compared to Kurunjang shows that there was a higher proportion of females in the younger age groups (under 15) and a lower proportion of females in the older age groups (65+).
Overall, 23.7% of the female population was aged between 0 and 15, and 6.8% were aged 65 years and over, compared with 22.7% and 11.2% respectively for Kurunjang.
The major differences between the female age structure of Rockbank and Kurunjang were:
- A larger percentage of females aged 30 to 34 (15.0% compared to 8.1%)
- A larger percentage of females aged 25 to 29 (12.0% compared to 7.4%)
- A larger percentage of females aged 0 to 4 (10.8% compared to 7.6%)
- A larger percentage of females aged 35 to 39 (10.5% compared to 7.6%)
Emerging groups
From 2016 to 2021, Rockbank's female population increased by 727 people (126.7%). This represents an average annual population change of 17.78% per year over the period.
The largest changes in female age structure in this area between 2016 and 2021 were in the age groups:
- 30 to 34 (+157 females)
- 25 to 29 (+121 females)
- 0 to 4 (+111 females)
- 35 to 39 (+109 females)
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