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, 55 to 59 year olds was the largest age group among residents in Boyup Brook (S), accounting for 8.5% (155 people). This share was higher than Regional WA (6.8%). Since 2016, the biggest change was in 20 to 24 year olds, which increased by 37 people and 1.8 percentage points.
Section overview
Age structure - Five year age groups
Boyup Brook (S) - Total persons (Usual residence)
This table summarises five year age groups for Boyup Brook (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 Boyup Brook (S), with comparison markers for Regional WA.
0 to 4
2021 count
105
% of total
5.7%
Change from 2016
0.0pp
105
5.7%
0.0pp
5 to 9
2021 count
113
% of total
6.2%
Change from 2016
-1.4pp
113
6.2%
-1.4pp
10 to 14
2021 count
119
% of total
6.5%
Change from 2016
+1.4pp
119
6.5%
+1.4pp
15 to 19
2021 count
76
% of total
4.1%
Change from 2016
+0.7pp
76
4.1%
+0.7pp
20 to 24
2021 count
76
% of total
4.1%
Change from 2016
+1.8pp
76
4.1%
+1.8pp
25 to 29
2021 count
58
% of total
3.2%
Change from 2016
+0.3pp
58
3.2%
+0.3pp
30 to 34
2021 count
68
% of total
3.7%
Change from 2016
-0.9pp
68
3.7%
-0.9pp
35 to 39
2021 count
117
% of total
6.4%
Change from 2016
+0.2pp
117
6.4%
+0.2pp
40 to 44
2021 count
110
% of total
6.0%
Change from 2016
-0.7pp
110
6.0%
-0.7pp
45 to 49
2021 count
113
% of total
6.2%
Change from 2016
-0.5pp
113
6.2%
-0.5pp
50 to 54
2021 count
128
% of total
7.0%
Change from 2016
-0.7pp
128
7.0%
-0.7pp
55 to 59
2021 count
155
% of total
8.5%
Change from 2016
+0.2pp
155
8.5%
+0.2pp
60 to 64
2021 count
142
% of total
7.7%
Change from 2016
0.0pp
142
7.7%
0.0pp
65 to 69
2021 count
129
% of total
7.0%
Change from 2016
-0.9pp
129
7.0%
-0.9pp
70 to 74
2021 count
111
% of total
6.1%
Change from 2016
-0.5pp
111
6.1%
-0.5pp
75 to 79
2021 count
92
% of total
5.0%
Change from 2016
+1.0pp
92
5.0%
+1.0pp
80 to 84
2021 count
60
% of total
3.3%
Change from 2016
+0.5pp
60
3.3%
+0.5pp
85 and over
2021 count
40
% of total
2.2%
Change from 2016
-0.2pp
40
2.2%
-0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+8
0.0pp
5 to 9
-17
-1.4pp
10 to 14
+33
+1.4pp
15 to 19
+18
+0.7pp
20 to 24
+37
+1.8pp
25 to 29
+8
+0.3pp
30 to 34
-10
-0.9pp
35 to 39
+12
+0.2pp
40 to 44
-4
-0.7pp
45 to 49
-1
-0.5pp
50 to 54
-3
-0.7pp
55 to 59
+13
+0.2pp
60 to 64
+11
0.0pp
65 to 69
-6
-0.9pp
70 to 74
-2
-0.5pp
75 to 79
+24
+1.0pp
80 to 84
+13
+0.5pp
85 and over
0
-0.2pp
Data table
Five year age groups for Boyup Brook (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 | 105 | 5.7% | 6.0% | 97 | 5.7% | 6.6% | +8 | 0.0pp |
| 5 to 9 | 113 | 6.2% | 6.7% | 130 | 7.6% | 7.1% | -17 | -1.4pp |
| 10 to 14 | 119 | 6.5% | 6.7% | 86 | 5.1% | 6.5% | +33 | +1.4pp |
| 15 to 19 | 76 | 4.1% | 5.5% | 58 | 3.4% | 5.7% | +18 | +0.7pp |
| 20 to 24 | 76 | 4.1% | 4.8% | 39 | 2.3% | 5.0% | +37 | +1.8pp |
| 25 to 29 | 58 | 3.2% | 5.9% | 50 | 2.9% | 6.5% | +8 | +0.3pp |
| 30 to 34 | 68 | 3.7% | 6.6% | 78 | 4.6% | 7.1% | -10 | -0.9pp |
| 35 to 39 | 117 | 6.4% | 6.8% | 105 | 6.2% | 6.7% | +12 | +0.2pp |
| 40 to 44 | 110 | 6.0% | 6.4% | 114 | 6.7% | 7.0% | -4 | -0.7pp |
| 45 to 49 | 113 | 6.2% | 6.6% | 114 | 6.7% | 7.2% | -1 | -0.5pp |
| 50 to 54 | 128 | 7.0% | 6.9% | 131 | 7.7% | 7.1% | -3 | -0.7pp |
| 55 to 59 | 155 | 8.5% | 6.8% | 142 | 8.3% | 6.9% | +13 | +0.2pp |
| 60 to 64 | 142 | 7.7% | 6.7% | 131 | 7.7% | 6.0% | +11 | 0.0pp |
| 65 to 69 | 129 | 7.0% | 5.7% | 135 | 7.9% | 5.3% | -6 | -0.9pp |
| 70 to 74 | 111 | 6.1% | 4.9% | 113 | 6.6% | 3.6% | -2 | -0.5pp |
| 75 to 79 | 92 | 5.0% | 3.2% | 68 | 4.0% | 2.6% | +24 | +1.0pp |
| 80 to 84 | 60 | 3.3% | 2.0% | 47 | 2.8% | 1.6% | +13 | +0.5pp |
| 85 and over | 40 | 2.2% | 1.7% | 40 | 2.4% | 1.5% | 0 | -0.2pp |
| Total | 1,834 | 100.0% | 100.0% | 1,701 | 100.0% | 100.0% | +133 | 0.0pp |