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, 60 to 64 year olds was the largest age group among residents in Boyup Brook, accounting for 10.2% (96 people). This share was higher than Boyup Brook (S) (7.7%). Since 2016, the biggest change was in 20 to 24 year olds, which increased by 34 people and 3.6 percentage points.
Section overview
Age structure - Five year age groups
Boyup Brook - Total persons (Usual residence)
This table summarises five year age groups for Boyup Brook in 2021 for persons, with comparison against Boyup Brook (S) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Boyup Brook, with comparison markers for Boyup Brook (S).
0 to 4
2021 count
45
% of total
4.8%
Change from 2016
-0.8pp
45
4.8%
-0.8pp
5 to 9
2021 count
64
% of total
6.8%
Change from 2016
+0.3pp
64
6.8%
+0.3pp
10 to 14
2021 count
54
% of total
5.8%
Change from 2016
-0.2pp
54
5.8%
-0.2pp
15 to 19
2021 count
30
% of total
3.2%
Change from 2016
-1.0pp
30
3.2%
-1.0pp
20 to 24
2021 count
49
% of total
5.2%
Change from 2016
+3.6pp
49
5.2%
+3.6pp
25 to 29
2021 count
37
% of total
3.9%
Change from 2016
+2.3pp
37
3.9%
+2.3pp
30 to 34
2021 count
31
% of total
3.3%
Change from 2016
-0.3pp
31
3.3%
-0.3pp
35 to 39
2021 count
56
% of total
6.0%
Change from 2016
+1.1pp
56
6.0%
+1.1pp
40 to 44
2021 count
42
% of total
4.5%
Change from 2016
-1.2pp
42
4.5%
-1.2pp
45 to 49
2021 count
59
% of total
6.3%
Change from 2016
-0.1pp
59
6.3%
-0.1pp
50 to 54
2021 count
69
% of total
7.4%
Change from 2016
-0.5pp
69
7.4%
-0.5pp
55 to 59
2021 count
79
% of total
8.4%
Change from 2016
+0.1pp
79
8.4%
+0.1pp
60 to 64
2021 count
96
% of total
10.2%
Change from 2016
+2.2pp
96
10.2%
+2.2pp
65 to 69
2021 count
69
% of total
7.4%
Change from 2016
-0.5pp
69
7.4%
-0.5pp
70 to 74
2021 count
64
% of total
6.8%
Change from 2016
+0.4pp
64
6.8%
+0.4pp
75 to 79
2021 count
58
% of total
6.2%
Change from 2016
+1.8pp
58
6.2%
+1.8pp
80 to 84
2021 count
33
% of total
3.5%
Change from 2016
-0.3pp
33
3.5%
-0.3pp
85 and over
2021 count
32
% of total
3.4%
Change from 2016
+0.1pp
32
3.4%
+0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-6
-0.8pp
5 to 9
+5
+0.3pp
10 to 14
-1
-0.2pp
15 to 19
-8
-1.0pp
20 to 24
+34
+3.6pp
25 to 29
+22
+2.3pp
30 to 34
-2
-0.3pp
35 to 39
+11
+1.1pp
40 to 44
-10
-1.2pp
45 to 49
+1
-0.1pp
50 to 54
-3
-0.5pp
55 to 59
+3
+0.1pp
60 to 64
+23
+2.2pp
65 to 69
-3
-0.5pp
70 to 74
+6
+0.4pp
75 to 79
+18
+1.8pp
80 to 84
-2
-0.3pp
85 and over
+2
+0.1pp
Data table
Five year age groups for Boyup Brook. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Boyup Brook (S).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Boyup Brook (S)% | Count | % | Boyup Brook (S)% | Count | pp | |
| 0 to 4 | 45 | 4.8% | 5.7% | 51 | 5.6% | 5.7% | -6 | -0.8pp |
| 5 to 9 | 64 | 6.8% | 6.2% | 59 | 6.5% | 7.6% | +5 | +0.3pp |
| 10 to 14 | 54 | 5.8% | 6.5% | 55 | 6.0% | 5.1% | -1 | -0.2pp |
| 15 to 19 | 30 | 3.2% | 4.1% | 38 | 4.2% | 3.4% | -8 | -1.0pp |
| 20 to 24 | 49 | 5.2% | 4.1% | 15 | 1.6% | 2.3% | +34 | +3.6pp |
| 25 to 29 | 37 | 3.9% | 3.2% | 15 | 1.6% | 2.9% | +22 | +2.3pp |
| 30 to 34 | 31 | 3.3% | 3.7% | 33 | 3.6% | 4.6% | -2 | -0.3pp |
| 35 to 39 | 56 | 6.0% | 6.4% | 45 | 4.9% | 6.2% | +11 | +1.1pp |
| 40 to 44 | 42 | 4.5% | 6.0% | 52 | 5.7% | 6.7% | -10 | -1.2pp |
| 45 to 49 | 59 | 6.3% | 6.2% | 58 | 6.4% | 6.7% | +1 | -0.1pp |
| 50 to 54 | 69 | 7.4% | 7.0% | 72 | 7.9% | 7.7% | -3 | -0.5pp |
| 55 to 59 | 79 | 8.4% | 8.5% | 76 | 8.3% | 8.3% | +3 | +0.1pp |
| 60 to 64 | 96 | 10.2% | 7.7% | 73 | 8.0% | 7.7% | +23 | +2.2pp |
| 65 to 69 | 69 | 7.4% | 7.0% | 72 | 7.9% | 7.9% | -3 | -0.5pp |
| 70 to 74 | 64 | 6.8% | 6.1% | 58 | 6.4% | 6.6% | +6 | +0.4pp |
| 75 to 79 | 58 | 6.2% | 5.0% | 40 | 4.4% | 4.0% | +18 | +1.8pp |
| 80 to 84 | 33 | 3.5% | 3.3% | 35 | 3.8% | 2.8% | -2 | -0.3pp |
| 85 and over | 32 | 3.4% | 2.2% | 30 | 3.3% | 2.4% | +2 | +0.1pp |
| Total | 938 | 100.0% | 100.0% | 911 | 100.0% | 100.0% | +27 | 0.0pp |