Population
Service age groups
About this topic
Service age groups divide the population into broad life-stage bands such as children, young adults, working-age adults, and older people. The groupings are designed to reflect typical demand for age-based services and facilities rather than exact five-year cohorts.
This view is useful for planning childcare, schools, recreation, aged services, and other community infrastructure. It works best alongside five year age groups, household type, and dwelling data, which add more detail about who is living in an area and how needs may change over time.
Interpretation notes
- This is a derived grouping rather than a direct Census question, so the age bands are planning-oriented summaries built from standard age data.
- Percentages relate to the total population; use five year age groups when exact cohort detail matters.
Related topics
Key insight
In 2021, Older workers and pre-retirees (50 to 59) was the most common category among residents in Tammin, accounting for 17.1% (22 people). This share was lower than Tammin (S) (22%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which decreased by 27 people and 10.5 percentage points.
Section overview
Age structure - Service age groups
Tammin - Total persons (Usual residence)
This table summarises service age groups for Tammin in 2021 for persons, with comparison against Tammin (S) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Tammin, with comparison markers for Tammin (S).
Babies and pre-schoolers (0 to 4)
Primary schoolers (5 to 11)
Secondary schoolers (12 to 17)
Tertiary education and independence (18 to 24)
Young workforce (25 to 34)
Parents and homebuilders (35 to 49)
Older workers and pre-retirees (50 to 59)
Empty nesters and retirees (60 to 69)
Seniors (70 to 84)
Elderly aged (85 and over)
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-6
-3.0pp
Primary schoolers (5 to 11)
-14
-5.2pp
Secondary schoolers (12 to 17)
0
+2.8pp
Tertiary education and independence (18 to 24)
0
+2.5pp
Young workforce (25 to 34)
-4
+0.6pp
Parents and homebuilders (35 to 49)
-27
-10.5pp
Older workers and pre-retirees (50 to 59)
-9
+1.8pp
Empty nesters and retirees (60 to 69)
-11
-0.2pp
Seniors (70 to 84)
-10
+0.3pp
Elderly aged (85 and over)
+4
+3.1pp
Data table
Service age groups for Tammin. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Tammin (S).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Tammin (S)% | Count | % | Tammin (S)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 0 | 0.0% | 4.9% | 6 | 3.0% | 5.0% | -6 | -3.0pp |
| Primary schoolers (5 to 11) | 6 | 4.7% | 9.8% | 20 | 9.9% | 13.9% | -14 | -5.2pp |
| Secondary schoolers (12 to 17) | 10 | 7.8% | 6.0% | 10 | 5.0% | 4.2% | 0 | +2.8pp |
| Tertiary education and independence (18 to 24) | 9 | 7.0% | 5.4% | 9 | 4.5% | 7.0% | 0 | +2.5pp |
| Young workforce (25 to 34) | 9 | 7.0% | 10.4% | 13 | 6.4% | 10.7% | -4 | +0.6pp |
| Parents and homebuilders (35 to 49) | 10 | 7.8% | 16.6% | 37 | 18.3% | 21.4% | -27 | -10.5pp |
| Older workers and pre-retirees (50 to 59) | 22 | 17.1% | 22.0% | 31 | 15.3% | 14.2% | -9 | +1.8pp |
| Empty nesters and retirees (60 to 69) | 19 | 14.7% | 10.1% | 30 | 14.9% | 11.7% | -11 | -0.2pp |
| Seniors (70 to 84) | 19 | 14.7% | 11.1% | 29 | 14.4% | 11.2% | -10 | +0.3pp |
| Elderly aged (85 and over) | 4 | 3.1% | 0.8% | 0 | 0.0% | 0.0% | +4 | +3.1pp |
| Total | 129 | 100.0% | 100.0% | 202 | 100.0% | 100.0% | -73 | 0.0pp |