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, Seniors (70 to 84) was the most common category among residents in Big Grove, accounting for 23.1% (52 people). This share was higher than Albany (C) (13.6%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 19 people and 6.5 percentage points.
Section overview
Age structure - Service age groups
Big Grove - Total persons (Usual residence)
This table summarises service age groups for Big Grove in 2021 for persons, with comparison against Albany (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Big Grove, with comparison markers for Albany (C).
Babies and pre-schoolers (0 to 4)
2021 count
0
% of total
0.0%
Change from 2016
-1.5pp
0
0.0%
-1.5pp
Primary schoolers (5 to 11)
2021 count
10
% of total
4.4%
Change from 2016
-4.1pp
10
4.4%
-4.1pp
Secondary schoolers (12 to 17)
2021 count
18
% of total
8.0%
Change from 2016
+6.5pp
18
8.0%
+6.5pp
Tertiary education and independence (18 to 24)
2021 count
11
% of total
4.9%
Change from 2016
+3.4pp
11
4.9%
+3.4pp
Young workforce (25 to 34)
2021 count
7
% of total
3.1%
Change from 2016
+0.1pp
7
3.1%
+0.1pp
Parents and homebuilders (35 to 49)
2021 count
24
% of total
10.7%
Change from 2016
-2.9pp
24
10.7%
-2.9pp
Older workers and pre-retirees (50 to 59)
2021 count
43
% of total
19.1%
Change from 2016
+5.0pp
43
19.1%
+5.0pp
Empty nesters and retirees (60 to 69)
2021 count
40
% of total
17.8%
Change from 2016
-6.8pp
40
17.8%
-6.8pp
Seniors (70 to 84)
2021 count
52
% of total
23.1%
Change from 2016
+6.5pp
52
23.1%
+6.5pp
Elderly aged (85 and over)
2021 count
0
% of total
0.0%
Change from 2016
-1.5pp
0
0.0%
-1.5pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-3
-1.5pp
Primary schoolers (5 to 11)
-7
-4.1pp
Secondary schoolers (12 to 17)
+15
+6.5pp
Tertiary education and independence (18 to 24)
+8
+3.4pp
Young workforce (25 to 34)
+1
+0.1pp
Parents and homebuilders (35 to 49)
-3
-2.9pp
Older workers and pre-retirees (50 to 59)
+15
+5.0pp
Empty nesters and retirees (60 to 69)
-9
-6.8pp
Seniors (70 to 84)
+19
+6.5pp
Elderly aged (85 and over)
-3
-1.5pp
Data table
Service age groups for Big Grove. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Albany (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Albany (C)% | Count | % | Albany (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 0 | 0.0% | 5.0% | 3 | 1.5% | 5.4% | -3 | -1.5pp |
| Primary schoolers (5 to 11) | 10 | 4.4% | 8.3% | 17 | 8.5% | 8.8% | -7 | -4.1pp |
| Secondary schoolers (12 to 17) | 18 | 8.0% | 8.3% | 3 | 1.5% | 8.6% | +15 | +6.5pp |
| Tertiary education and independence (18 to 24) | 11 | 4.9% | 6.6% | 3 | 1.5% | 7.1% | +8 | +3.4pp |
| Young workforce (25 to 34) | 7 | 3.1% | 10.7% | 6 | 3.0% | 10.6% | +1 | +0.1pp |
| Parents and homebuilders (35 to 49) | 24 | 10.7% | 17.1% | 27 | 13.6% | 18.3% | -3 | -2.9pp |
| Older workers and pre-retirees (50 to 59) | 43 | 19.1% | 13.4% | 28 | 14.1% | 13.9% | +15 | +5.0pp |
| Empty nesters and retirees (60 to 69) | 40 | 17.8% | 13.9% | 49 | 24.6% | 13.3% | -9 | -6.8pp |
| Seniors (70 to 84) | 52 | 23.1% | 13.6% | 33 | 16.6% | 11.3% | +19 | +6.5pp |
| Elderly aged (85 and over) | 0 | 0.0% | 3.0% | 3 | 1.5% | 2.9% | -3 | -1.5pp |
| Total | 225 | 100.0% | 100.0% | 199 | 100.0% | 100.0% | +26 | 0.0pp |