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, 45 to 49 year olds was the largest age group among residents in Chapman Valley (S), accounting for 9.3% (145 people). This share was higher than Regional WA (6.6%). Since 2016, the biggest change was in 55 to 59 year olds, which increased by 27 people and 1.1 percentage points.
Section overview
Age structure - Five year age groups
Chapman Valley (S) - Total persons (Usual residence)
This table summarises five year age groups for Chapman Valley (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 Chapman Valley (S), with comparison markers for Regional WA.
0 to 4
2021 count
79
% of total
5.1%
Change from 2016
-0.5pp
79
5.1%
-0.5pp
5 to 9
2021 count
128
% of total
8.2%
Change from 2016
-1.9pp
128
8.2%
-1.9pp
10 to 14
2021 count
125
% of total
8.0%
Change from 2016
+1.0pp
125
8.0%
+1.0pp
15 to 19
2021 count
101
% of total
6.5%
Change from 2016
+1.2pp
101
6.5%
+1.2pp
20 to 24
2021 count
54
% of total
3.5%
Change from 2016
+0.9pp
54
3.5%
+0.9pp
25 to 29
2021 count
56
% of total
3.6%
Change from 2016
+1.1pp
56
3.6%
+1.1pp
30 to 34
2021 count
70
% of total
4.5%
Change from 2016
-0.9pp
70
4.5%
-0.9pp
35 to 39
2021 count
94
% of total
6.0%
Change from 2016
-1.0pp
94
6.0%
-1.0pp
40 to 44
2021 count
105
% of total
6.7%
Change from 2016
-0.6pp
105
6.7%
-0.6pp
45 to 49
2021 count
145
% of total
9.3%
Change from 2016
-0.1pp
145
9.3%
-0.1pp
50 to 54
2021 count
143
% of total
9.2%
Change from 2016
+0.3pp
143
9.2%
+0.3pp
55 to 59
2021 count
137
% of total
8.8%
Change from 2016
+1.1pp
137
8.8%
+1.1pp
60 to 64
2021 count
116
% of total
7.5%
Change from 2016
+0.9pp
116
7.5%
+0.9pp
65 to 69
2021 count
85
% of total
5.5%
Change from 2016
-1.0pp
85
5.5%
-1.0pp
70 to 74
2021 count
82
% of total
5.3%
Change from 2016
+1.2pp
82
5.3%
+1.2pp
75 to 79
2021 count
34
% of total
2.2%
Change from 2016
-0.8pp
34
2.2%
-0.8pp
80 to 84
2021 count
15
% of total
1.0%
Change from 2016
-0.3pp
15
1.0%
-0.3pp
85 and over
2021 count
5
% of total
0.3%
Change from 2016
-0.4pp
5
0.3%
-0.4pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
0
-0.5pp
5 to 9
-16
-1.9pp
10 to 14
+25
+1.0pp
15 to 19
+25
+1.2pp
20 to 24
+17
+0.9pp
25 to 29
+21
+1.1pp
30 to 34
-7
-0.9pp
35 to 39
-6
-1.0pp
40 to 44
+1
-0.6pp
45 to 49
+12
-0.1pp
50 to 54
+17
+0.3pp
55 to 59
+27
+1.1pp
60 to 64
+22
+0.9pp
65 to 69
-8
-1.0pp
70 to 74
+23
+1.2pp
75 to 79
-8
-0.8pp
80 to 84
-3
-0.3pp
85 and over
-5
-0.4pp
Data table
Five year age groups for Chapman Valley (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 | 79 | 5.1% | 6.0% | 79 | 5.6% | 6.6% | 0 | -0.5pp |
| 5 to 9 | 128 | 8.2% | 6.7% | 144 | 10.1% | 7.1% | -16 | -1.9pp |
| 10 to 14 | 125 | 8.0% | 6.7% | 100 | 7.0% | 6.5% | +25 | +1.0pp |
| 15 to 19 | 101 | 6.5% | 5.5% | 76 | 5.3% | 5.7% | +25 | +1.2pp |
| 20 to 24 | 54 | 3.5% | 4.8% | 37 | 2.6% | 5.0% | +17 | +0.9pp |
| 25 to 29 | 56 | 3.6% | 5.9% | 35 | 2.5% | 6.5% | +21 | +1.1pp |
| 30 to 34 | 70 | 4.5% | 6.6% | 77 | 5.4% | 7.1% | -7 | -0.9pp |
| 35 to 39 | 94 | 6.0% | 6.8% | 100 | 7.0% | 6.7% | -6 | -1.0pp |
| 40 to 44 | 105 | 6.7% | 6.4% | 104 | 7.3% | 7.0% | +1 | -0.6pp |
| 45 to 49 | 145 | 9.3% | 6.6% | 133 | 9.4% | 7.2% | +12 | -0.1pp |
| 50 to 54 | 143 | 9.2% | 6.9% | 126 | 8.9% | 7.1% | +17 | +0.3pp |
| 55 to 59 | 137 | 8.8% | 6.8% | 110 | 7.7% | 6.9% | +27 | +1.1pp |
| 60 to 64 | 116 | 7.5% | 6.7% | 94 | 6.6% | 6.0% | +22 | +0.9pp |
| 65 to 69 | 85 | 5.5% | 5.7% | 93 | 6.5% | 5.3% | -8 | -1.0pp |
| 70 to 74 | 82 | 5.3% | 4.9% | 59 | 4.1% | 3.6% | +23 | +1.2pp |
| 75 to 79 | 34 | 2.2% | 3.2% | 42 | 3.0% | 2.6% | -8 | -0.8pp |
| 80 to 84 | 15 | 1.0% | 2.0% | 18 | 1.3% | 1.6% | -3 | -0.3pp |
| 85 and over | 5 | 0.3% | 1.7% | 10 | 0.7% | 1.5% | -5 | -0.4pp |
| Total | 1,556 | 100.0% | 100.0% | 1,422 | 100.0% | 100.0% | +134 | 0.0pp |