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LEARN MORE ABOUT .idIn 2021, Tiwi Islands Regional Council LGA had higher proportion of children (under 18) and a lower proportion of persons aged 60 or older than Roper Gulf Regional Council LGA.
The Age Structure of Tiwi Islands Regional Council LGA provides key insights into the level of demand for age based services and facilities such as child care. It is an indicator of Tiwi Islands Regional Council LGA's residential role and function and how it is likely to change in the future.
Service age groups divide the population into age categories that reflect typical life-stages. They indicate the level of demand for services that target people at different stages in life and how that demand is changing.
To get a more complete picture Tiwi Islands Regional Council LGA'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 - Service age groups | |||||||
|---|---|---|---|---|---|---|---|
| Tiwi Islands Regional Council LGA - Total persons (Usual residence) | 2021 | 2016 | Change | ||||
| Service age group (years) | Number | % | Roper Gulf Regional Council LGA % | Number | % | Roper Gulf Regional Council LGA % | 2016 to 2021 |
| Babies and pre-schoolers (0 to 4) | 149 | 6.3 | 6.8 | 159 | 6.5 | 10.1 | -10 |
| Primary schoolers (5 to 11) | 236 | 10.0 | 11.2 | 328 | 13.3 | 13.6 | -92 |
| Secondary schoolers (12 to 17) | 301 | 12.8 | 9.7 | 241 | 9.8 | 11.0 | +60 |
| Tertiary education and independence (18 to 24) | 245 | 10.4 | 14.6 | 273 | 11.1 | 11.7 | -28 |
| Young workforce (25 to 34) | 396 | 16.8 | 17.8 | 417 | 17.0 | 17.2 | -21 |
| Parents and homebuilders (35 to 49) | 518 | 22.0 | 18.9 | 555 | 22.6 | 18.5 | -37 |
| Older workers and pre-retirees (50 to 59) | 300 | 12.7 | 11.0 | 274 | 11.2 | 9.6 | +26 |
| Empty nesters and retirees (60 to 69) | 168 | 7.1 | 6.7 | 158 | 6.4 | 5.6 | +10 |
| Seniors (70 to 84) | 44 | 1.9 | 3.2 | 48 | 2.0 | 2.5 | -4 |
| Elderly aged (85 and over) | 0 | -- | 0.2 | 4 | 0.2 | 0.1 | -4 |
| Total | 2,357 | 100.0 | 100.0 | 2,457 | 100.0 | 100.0 | -100 |
Dominant groups
Analysis of the service age groups of Tiwi Islands Regional Council LGA in 2021 compared to Roper Gulf Regional Council LGA shows that there was a higher proportion of people in the younger age groups (0 to 17 years) and a lower proportion of people in the older age groups (60+ years).
Overall, 29.1% of the population was aged between 0 and 17, and 9.0% were aged 60 years and over, compared with 27.7% and 10.0% respectively for Roper Gulf Regional Council LGA.
The major differences between the age structure of Tiwi Islands Regional Council LGA and Roper Gulf Regional Council LGA were:
- A larger percentage of 'Parents and homebuilders' (22.0% compared to 18.9%)
- A larger percentage of 'Secondary schoolers' (12.8% compared to 9.7%)
- A larger percentage of 'Older workers & pre-retirees' (12.7% compared to 11.0%)
- A smaller percentage of 'Tertiary education & independence' (10.4% compared to 14.6%)
Emerging groups
From 2016 to 2021, Tiwi Islands Regional Council LGA's population decreased by 100 people (4.1%). This represents an average annual population change of -0.83% per year over the period.
The largest changes in the age structure in this area between 2016 and 2021 were in the age groups:
- Primary schoolers (5 to 11) (-92 people)
- Secondary schoolers (12 to 17) (+60 people)
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