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, 50 to 54 year olds was the largest age group among residents in Brookton (S), accounting for 9.4% (87 people). This share was higher than Regional WA (6.9%). Since 2016, the biggest change was in 45 to 49 year olds, which decreased by 34 people and 3.2 percentage points.
Section overview
Age structure - Five year age groups
Brookton (S) - Total persons (Usual residence)
This table summarises five year age groups for Brookton (S) in 2021 for persons, with comparison against Regional WA and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Brookton (S), with comparison markers for Regional WA.
0 to 4
2021 count
58
% of total
6.2%
Change from 2016
-0.5pp
58
6.2%
-0.5pp
5 to 9
2021 count
53
% of total
5.7%
Change from 2016
-1.5pp
53
5.7%
-1.5pp
10 to 14
2021 count
33
% of total
3.6%
Change from 2016
+1.0pp
33
3.6%
+1.0pp
15 to 19
2021 count
35
% of total
3.8%
Change from 2016
-0.3pp
35
3.8%
-0.3pp
20 to 24
2021 count
41
% of total
4.4%
Change from 2016
+0.8pp
41
4.4%
+0.8pp
25 to 29
2021 count
30
% of total
3.2%
Change from 2016
-1.6pp
30
3.2%
-1.6pp
30 to 34
2021 count
41
% of total
4.4%
Change from 2016
+0.1pp
41
4.4%
+0.1pp
35 to 39
2021 count
49
% of total
5.3%
Change from 2016
+0.1pp
49
5.3%
+0.1pp
40 to 44
2021 count
57
% of total
6.1%
Change from 2016
+1.6pp
57
6.1%
+1.6pp
45 to 49
2021 count
47
% of total
5.1%
Change from 2016
-3.2pp
47
5.1%
-3.2pp
50 to 54
2021 count
87
% of total
9.4%
Change from 2016
+1.0pp
87
9.4%
+1.0pp
55 to 59
2021 count
72
% of total
7.8%
Change from 2016
+2.4pp
72
7.8%
+2.4pp
60 to 64
2021 count
51
% of total
5.5%
Change from 2016
-1.2pp
51
5.5%
-1.2pp
65 to 69
2021 count
59
% of total
6.4%
Change from 2016
-3.0pp
59
6.4%
-3.0pp
70 to 74
2021 count
73
% of total
7.9%
Change from 2016
+1.4pp
73
7.9%
+1.4pp
75 to 79
2021 count
45
% of total
4.8%
Change from 2016
+0.4pp
45
4.8%
+0.4pp
80 to 84
2021 count
39
% of total
4.2%
Change from 2016
+0.4pp
39
4.2%
+0.4pp
85 and over
2021 count
42
% of total
4.5%
Change from 2016
0.0pp
42
4.5%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-7
-0.5pp
5 to 9
-17
-1.5pp
10 to 14
+8
+1.0pp
15 to 19
-5
-0.3pp
20 to 24
+6
+0.8pp
25 to 29
-17
-1.6pp
30 to 34
-1
+0.1pp
35 to 39
-2
+0.1pp
40 to 44
+13
+1.6pp
45 to 49
-34
-3.2pp
50 to 54
+5
+1.0pp
55 to 59
+19
+2.4pp
60 to 64
-14
-1.2pp
65 to 69
-33
-3.0pp
70 to 74
+10
+1.4pp
75 to 79
+2
+0.4pp
80 to 84
+2
+0.4pp
85 and over
-2
0.0pp
Data table
Five year age groups for Brookton (S). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Regional WA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional WA% | Count | % | Regional WA% | Count | pp | |
| 0 to 4 | 58 | 6.2% | 6.0% | 65 | 6.7% | 6.6% | -7 | -0.5pp |
| 5 to 9 | 53 | 5.7% | 6.7% | 70 | 7.2% | 7.1% | -17 | -1.5pp |
| 10 to 14 | 33 | 3.6% | 6.7% | 25 | 2.6% | 6.5% | +8 | +1.0pp |
| 15 to 19 | 35 | 3.8% | 5.5% | 40 | 4.1% | 5.7% | -5 | -0.3pp |
| 20 to 24 | 41 | 4.4% | 4.8% | 35 | 3.6% | 5.0% | +6 | +0.8pp |
| 25 to 29 | 30 | 3.2% | 5.9% | 47 | 4.8% | 6.5% | -17 | -1.6pp |
| 30 to 34 | 41 | 4.4% | 6.6% | 42 | 4.3% | 7.1% | -1 | +0.1pp |
| 35 to 39 | 49 | 5.3% | 6.8% | 51 | 5.2% | 6.7% | -2 | +0.1pp |
| 40 to 44 | 57 | 6.1% | 6.4% | 44 | 4.5% | 7.0% | +13 | +1.6pp |
| 45 to 49 | 47 | 5.1% | 6.6% | 81 | 8.3% | 7.2% | -34 | -3.2pp |
| 50 to 54 | 87 | 9.4% | 6.9% | 82 | 8.4% | 7.1% | +5 | +1.0pp |
| 55 to 59 | 72 | 7.8% | 6.8% | 53 | 5.4% | 6.9% | +19 | +2.4pp |
| 60 to 64 | 51 | 5.5% | 6.7% | 65 | 6.7% | 6.0% | -14 | -1.2pp |
| 65 to 69 | 59 | 6.4% | 5.7% | 92 | 9.4% | 5.3% | -33 | -3.0pp |
| 70 to 74 | 73 | 7.9% | 4.9% | 63 | 6.5% | 3.6% | +10 | +1.4pp |
| 75 to 79 | 45 | 4.8% | 3.2% | 43 | 4.4% | 2.6% | +2 | +0.4pp |
| 80 to 84 | 39 | 4.2% | 2.0% | 37 | 3.8% | 1.6% | +2 | +0.4pp |
| 85 and over | 42 | 4.5% | 1.7% | 44 | 4.5% | 1.5% | -2 | 0.0pp |
| Total | 929 | 100.0% | 100.0% | 975 | 100.0% | 100.0% | -46 | 0.0pp |