Population
Five year age groups
About this topic
Five year age groups show the population in standard five-year cohorts from early childhood through older age. Because each band covers the same span of years, the topic gives a clear and comparable view of an area's age structure.
This topic is useful for identifying growth or decline in specific cohorts and for comparing age patterns across places and over time. For service planning, it is often read together with service age groups, household types, and dwelling types.
Interpretation notes
- Age is reported as at Census night, so the counts are a snapshot of the resident age structure at that point in time.
- Because each band covers the same five-year span, this topic is best for exact cohort comparison rather than service-planning life stages.
Related topics
Key insight
In 2021, 0 to 4 year olds was the largest age group among residents in Nairne, accounting for 7.6% (406 people). This share was higher than Mount Barker (DC) (6.4%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 109 people and 1.9 percentage points.
Section overview
Age structure - Five year age groups
Nairne - Total persons (Usual residence)
This table summarises five year age groups for Nairne in 2021 for persons, with comparison against Mount Barker (DC) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Nairne, with comparison markers for Mount Barker (DC).
0 to 4
2021 count
406
% of total
7.6%
Change from 2016
-0.3pp
406
7.6%
-0.3pp
5 to 9
2021 count
393
% of total
7.4%
Change from 2016
-0.1pp
393
7.4%
-0.1pp
10 to 14
2021 count
374
% of total
7.0%
Change from 2016
-0.1pp
374
7.0%
-0.1pp
15 to 19
2021 count
308
% of total
5.8%
Change from 2016
-1.3pp
308
5.8%
-1.3pp
20 to 24
2021 count
305
% of total
5.7%
Change from 2016
-0.4pp
305
5.7%
-0.4pp
25 to 29
2021 count
392
% of total
7.4%
Change from 2016
+0.1pp
392
7.4%
+0.1pp
30 to 34
2021 count
393
% of total
7.4%
Change from 2016
+0.6pp
393
7.4%
+0.6pp
35 to 39
2021 count
384
% of total
7.2%
Change from 2016
+0.6pp
384
7.2%
+0.6pp
40 to 44
2021 count
304
% of total
5.7%
Change from 2016
-2.4pp
304
5.7%
-2.4pp
45 to 49
2021 count
381
% of total
7.2%
Change from 2016
-0.6pp
381
7.2%
-0.6pp
50 to 54
2021 count
367
% of total
6.9%
Change from 2016
-0.1pp
367
6.9%
-0.1pp
55 to 59
2021 count
345
% of total
6.5%
Change from 2016
+0.6pp
345
6.5%
+0.6pp
60 to 64
2021 count
283
% of total
5.3%
Change from 2016
+0.5pp
283
5.3%
+0.5pp
65 to 69
2021 count
243
% of total
4.6%
Change from 2016
0.0pp
243
4.6%
0.0pp
70 to 74
2021 count
249
% of total
4.7%
Change from 2016
+1.9pp
249
4.7%
+1.9pp
75 to 79
2021 count
117
% of total
2.2%
Change from 2016
+0.5pp
117
2.2%
+0.5pp
80 to 84
2021 count
57
% of total
1.1%
Change from 2016
+0.3pp
57
1.1%
+0.3pp
85 and over
2021 count
26
% of total
0.5%
Change from 2016
0.0pp
26
0.5%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+9
-0.3pp
5 to 9
+13
-0.1pp
10 to 14
+17
-0.1pp
15 to 19
-51
-1.3pp
20 to 24
-5
-0.4pp
25 to 29
+23
+0.1pp
30 to 34
+48
+0.6pp
35 to 39
+50
+0.6pp
40 to 44
-103
-2.4pp
45 to 49
-13
-0.6pp
50 to 54
+13
-0.1pp
55 to 59
+50
+0.6pp
60 to 64
+41
+0.5pp
65 to 69
+11
0.0pp
70 to 74
+109
+1.9pp
75 to 79
+32
+0.5pp
80 to 84
+16
+0.3pp
85 and over
+3
0.0pp
Data table
Five year age groups for Nairne. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Mount Barker (DC).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mount Barker (DC)% | Count | % | Mount Barker (DC)% | Count | pp | |
| 0 to 4 | 406 | 7.6% | 6.4% | 397 | 7.9% | 6.4% | +9 | -0.3pp |
| 5 to 9 | 393 | 7.4% | 6.4% | 380 | 7.5% | 7.0% | +13 | -0.1pp |
| 10 to 14 | 374 | 7.0% | 6.8% | 357 | 7.1% | 6.7% | +17 | -0.1pp |
| 15 to 19 | 308 | 5.8% | 6.0% | 359 | 7.1% | 6.9% | -51 | -1.3pp |
| 20 to 24 | 305 | 5.7% | 5.8% | 310 | 6.1% | 5.7% | -5 | -0.4pp |
| 25 to 29 | 392 | 7.4% | 6.2% | 369 | 7.3% | 5.5% | +23 | +0.1pp |
| 30 to 34 | 393 | 7.4% | 6.4% | 345 | 6.8% | 6.0% | +48 | +0.6pp |
| 35 to 39 | 384 | 7.2% | 6.7% | 334 | 6.6% | 6.1% | +50 | +0.6pp |
| 40 to 44 | 304 | 5.7% | 6.2% | 407 | 8.1% | 7.2% | -103 | -2.4pp |
| 45 to 49 | 381 | 7.2% | 6.7% | 394 | 7.8% | 7.4% | -13 | -0.6pp |
| 50 to 54 | 367 | 6.9% | 6.8% | 354 | 7.0% | 6.9% | +13 | -0.1pp |
| 55 to 59 | 345 | 6.5% | 6.2% | 295 | 5.9% | 6.7% | +50 | +0.6pp |
| 60 to 64 | 283 | 5.3% | 5.9% | 242 | 4.8% | 6.0% | +41 | +0.5pp |
| 65 to 69 | 243 | 4.6% | 5.6% | 232 | 4.6% | 5.5% | +11 | 0.0pp |
| 70 to 74 | 249 | 4.7% | 5.0% | 140 | 2.8% | 4.0% | +109 | +1.9pp |
| 75 to 79 | 117 | 2.2% | 3.3% | 85 | 1.7% | 2.4% | +32 | +0.5pp |
| 80 to 84 | 57 | 1.1% | 1.9% | 41 | 0.8% | 1.7% | +16 | +0.3pp |
| 85 and over | 26 | 0.5% | 1.9% | 23 | 0.5% | 1.9% | +3 | 0.0pp |
| Total | 5,327 | 100.0% | 100.0% | 5,042 | 100.0% | 100.0% | +285 | 0.0pp |