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LEARN MORE ABOUT .idIn 2021, the largest age group in Big Rivers was 25 to 29 year olds. The group that changed the most since 2011 was 30 to 34 year olds, increasing by 705 people.
The Age Structure of Big Rivers provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Big Rivers'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 Big Rivers'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 | |||||||
|---|---|---|---|---|---|---|---|
| Big Rivers - Total persons (Enumerated) | 2021 | 2011 | Change | ||||
| Five year age groups (years) | Number | % | West Arnhem Regional Council LGA % | Number | % | West Arnhem Regional Council LGA % | 2011 to 2021 |
| 0 to 4 | 1,460 | 5.7 | 6.0 | 1,917 | 8.8 | 8.0 | -457 |
| 5 to 9 | 1,664 | 6.5 | 7.7 | 1,749 | 8.0 | 9.8 | -85 |
| 10 to 14 | 1,553 | 6.1 | 6.5 | 1,476 | 6.8 | 7.8 | +76 |
| 15 to 19 | 1,399 | 5.5 | 6.8 | 1,322 | 6.1 | 7.6 | +76 |
| 20 to 24 | 1,845 | 7.3 | 7.8 | 1,694 | 7.8 | 9.0 | +151 |
| 25 to 29 | 2,141 | 8.4 | 9.8 | 1,725 | 7.9 | 9.2 | +415 |
| 30 to 34 | 2,141 | 8.4 | 9.2 | 1,436 | 6.6 | 8.0 | +705 |
| 35 to 39 | 1,787 | 7.0 | 7.9 | 1,381 | 6.3 | 8.1 | +406 |
| 40 to 44 | 1,414 | 5.6 | 6.2 | 1,516 | 7.0 | 7.6 | -103 |
| 45 to 49 | 1,401 | 5.5 | 5.5 | 1,289 | 5.9 | 5.6 | +111 |
| 50 to 54 | 1,652 | 6.5 | 6.8 | 1,369 | 6.3 | 6.1 | +282 |
| 55 to 59 | 1,653 | 6.5 | 5.8 | 1,402 | 6.4 | 4.6 | +251 |
| 60 to 64 | 1,779 | 7.0 | 6.0 | 1,386 | 6.4 | 4.3 | +392 |
| 65 to 69 | 1,672 | 6.6 | 4.2 | 1,008 | 4.6 | 2.5 | +663 |
| 70 to 74 | 1,146 | 4.5 | 2.4 | 617 | 2.8 | 1.1 | +528 |
| 75 to 79 | 457 | 1.8 | 1.0 | 292 | 1.3 | 0.5 | +165 |
| 80 to 84 | 167 | 0.7 | 0.3 | 122 | 0.6 | 0.3 | +45 |
| 85 and over | 76 | 0.3 | 0.0 | 72 | 0.3 | 0.2 | +4 |
| Total population | 25,407 | 100.0 | 100.0 | 21,780 | 100.0 | 100.0 | +3,627 |
Dominant groups
Analysis of the five year age groups of Big Rivers in 2021 compared to West Arnhem Regional Council LGA shows that there was a lower proportion of people in the younger age groups (under 15) and a higher proportion of people in the older age groups (65+).
Overall, 18.4% of the population was aged between 0 and 15, and 13.8% were aged 65 years and over, compared with 20.2% and 8.0% respectively for West Arnhem Regional Council LGA.
The major differences between the age structure of Big Rivers and West Arnhem Regional Council LGA were:
- A larger percentage of persons aged 65 to 69 (6.6% compared to 4.2%)
- A larger percentage of persons aged 70 to 74 (4.5% compared to 2.4%)
- A smaller percentage of persons aged 25 to 29 (8.4% compared to 9.8%)
- A smaller percentage of persons aged 15 to 19 (5.5% compared to 6.8%)
Emerging groups
From 2011 to 2021, Big Rivers's population increased by 3,627 people (16.7%). This represents an average annual population change of 1.55% per year over the period.
The largest changes in age structure in this area between 2011 and 2021 were in the age groups:
- 30 to 34 (+705 persons)
- 65 to 69 (+663 persons)
- 70 to 74 (+528 persons)
- 0 to 4 (-457 persons)
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