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LEARN MORE ABOUT .idIn 2021, the largest age group in Two Rocks was 5 to 9 year olds. The group that changed the most since 2001 was 5 to 9 year olds, increasing by 210 people.
The Age Structure of Two Rocks provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Two Rocks'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 Two Rocks'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 | |||||||
|---|---|---|---|---|---|---|---|
| Two Rocks - Total persons (Enumerated) | 2021 | 2001 | Change | ||||
| Five year age groups (years) | Number | % | Neerabup - Pinjar - Nowergup - Carabooda % | Number | % | Neerabup - Pinjar - Nowergup - Carabooda % | 2001 to 2021 |
| 0 to 4 | 247 | 6.8 | 3.3 | 87 | 5.9 | 5.5 | +160 |
| 5 to 9 | 314 | 8.7 | 6.9 | 104 | 7.0 | 8.8 | +210 |
| 10 to 14 | 308 | 8.5 | 7.6 | 117 | 7.9 | 9.0 | +191 |
| 15 to 19 | 193 | 5.3 | 7.8 | 60 | 4.1 | 9.3 | +133 |
| 20 to 24 | 166 | 4.6 | 5.5 | 46 | 3.1 | 5.4 | +120 |
| 25 to 29 | 176 | 4.9 | 4.4 | 56 | 3.8 | 9.0 | +120 |
| 30 to 34 | 230 | 6.4 | 5.5 | 78 | 5.3 | 7.0 | +152 |
| 35 to 39 | 214 | 5.9 | 3.9 | 111 | 7.5 | 6.7 | +103 |
| 40 to 44 | 220 | 6.1 | 6.0 | 114 | 7.7 | 8.2 | +106 |
| 45 to 49 | 235 | 6.5 | 10.3 | 89 | 6.0 | 8.4 | +146 |
| 50 to 54 | 292 | 8.1 | 8.1 | 105 | 7.1 | 7.6 | +187 |
| 55 to 59 | 232 | 6.4 | 9.9 | 123 | 8.3 | 3.8 | +109 |
| 60 to 64 | 232 | 6.4 | 7.4 | 125 | 8.5 | 4.1 | +107 |
| 65 to 69 | 185 | 5.1 | 5.4 | 107 | 7.2 | 3.0 | +78 |
| 70 to 74 | 176 | 4.9 | 3.9 | 75 | 5.1 | 2.7 | +101 |
| 75 to 79 | 98 | 2.7 | 2.0 | 59 | 4.0 | 0.4 | +39 |
| 80 to 84 | 74 | 2.0 | 1.4 | 14 | 0.9 | 0.8 | +60 |
| 85 and over | 30 | 0.8 | 0.8 | 6 | 0.4 | 0.4 | +24 |
| Total population | 3,622 | 100.0 | 100.0 | 1,476 | 100.0 | 100.0 | +2,146 |
Dominant groups
Analysis of the five year age groups of Two Rocks in 2021 compared to Neerabup - Pinjar - Nowergup - Carabooda shows that there was a higher proportion of people in the younger age groups (under 15) as well as a higher proportion of people in the older age groups (65+).
Overall, 24.0% of the population was aged between 0 and 15, and 15.5% were aged 65 years and over, compared with 17.8% and 13.4% respectively for Neerabup - Pinjar - Nowergup - Carabooda.
The major differences between the age structure of Two Rocks and Neerabup - Pinjar - Nowergup - Carabooda were:
- A larger percentage of persons aged 0 to 4 (6.8% compared to 3.3%)
- A smaller percentage of persons aged 45 to 49 (6.5% compared to 10.3%)
- A smaller percentage of persons aged 55 to 59 (6.4% compared to 9.9%)
- A smaller percentage of persons aged 15 to 19 (5.3% compared to 7.8%)
Emerging groups
From 2001 to 2021, Two Rocks's population increased by 2,146 people (145.4%). This represents an average annual population change of 4.59% per year over the period.
The largest changes in age structure in this area between 2001 and 2021 were in the age groups:
- 5 to 9 (+210 persons)
- 10 to 14 (+191 persons)
- 50 to 54 (+187 persons)
- 0 to 4 (+160 persons)
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