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LEARN MORE ABOUT .idIn 2021, the largest age group in Big Rivers was 30 to 34 year olds. The group that changed the most since 2001 was 60 to 64 year olds, increasing by 438 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 (Usual residence) | 2021 | 2001 | Change | ||||
| Five year age groups (years) | Number | % | Katherine Town Council LGA % | Number | % | Katherine Town Council LGA % | 2001 to 2021 |
| 0 to 4 | 1,374 | 7.2 | 7.3 | 1,760 | 10.2 | 9.9 | -386 |
| 5 to 9 | 1,501 | 7.9 | 7.9 | 1,812 | 10.5 | 10.1 | -311 |
| 10 to 14 | 1,485 | 7.8 | 7.3 | 1,591 | 9.2 | 9.3 | -107 |
| 15 to 19 | 1,349 | 7.1 | 5.2 | 1,389 | 8.1 | 6.7 | -40 |
| 20 to 24 | 1,626 | 8.6 | 6.9 | 1,371 | 7.9 | 6.8 | +255 |
| 25 to 29 | 1,754 | 9.2 | 9.2 | 1,586 | 9.2 | 8.7 | +167 |
| 30 to 34 | 1,757 | 9.3 | 10.0 | 1,595 | 9.2 | 10.1 | +162 |
| 35 to 39 | 1,446 | 7.6 | 8.3 | 1,433 | 8.3 | 9.1 | +13 |
| 40 to 44 | 1,120 | 5.9 | 6.2 | 1,248 | 7.2 | 8.0 | -129 |
| 45 to 49 | 1,068 | 5.6 | 5.8 | 968 | 5.6 | 6.4 | +100 |
| 50 to 54 | 1,193 | 6.3 | 6.4 | 866 | 5.0 | 5.4 | +327 |
| 55 to 59 | 978 | 5.2 | 5.5 | 601 | 3.5 | 3.4 | +377 |
| 60 to 64 | 830 | 4.4 | 5.1 | 392 | 2.3 | 2.2 | +438 |
| 65 to 69 | 620 | 3.3 | 3.6 | 230 | 1.3 | 1.6 | +390 |
| 70 to 74 | 442 | 2.3 | 2.5 | 183 | 1.1 | 0.9 | +259 |
| 75 to 79 | 236 | 1.2 | 1.5 | 120 | 0.7 | 0.7 | +116 |
| 80 to 84 | 120 | 0.6 | 0.8 | 65 | 0.4 | 0.4 | +55 |
| 85 and over | 71 | 0.4 | 0.5 | 40 | 0.2 | 0.3 | +31 |
| Total population | 18,970 | 100.0 | 100.0 | 17,256 | 100.0 | 100.0 | +1,714 |
Dominant groups
Analysis of the five year age groups of Big Rivers in 2021 compared to Katherine Town Council LGA shows that there was a higher proportion of people in the younger age groups (under 15) and a lower proportion of people in the older age groups (65+).
Overall, 23.0% of the population was aged between 0 and 15, and 7.8% were aged 65 years and over, compared with 22.5% and 8.9% respectively for Katherine Town Council LGA.
The major differences between the age structure of Big Rivers and Katherine Town Council LGA were:
- A larger percentage of persons aged 15 to 19 (7.1% compared to 5.2%)
- A larger percentage of persons aged 20 to 24 (8.6% compared to 6.9%)
- A smaller percentage of persons aged 30 to 34 (9.3% compared to 10.0%)
- A smaller percentage of persons aged 60 to 64 (4.4% compared to 5.1%)
Emerging groups
From 2001 to 2021, Big Rivers's population increased by 1,714 people (9.9%). This represents an average annual population change of 0.47% per year over the period.
The largest changes in age structure in this area between 2001 and 2021 were in the age groups:
- 60 to 64 (+438 persons)
- 65 to 69 (+390 persons)
- 0 to 4 (-386 persons)
- 55 to 59 (+377 persons)
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