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, 70 to 74 year olds was the largest age group among residents in Gnangara, accounting for 9.9% (134 people). This share was higher than Wanneroo (C) (3.3%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 75 people and 4.7 percentage points.
Section overview
Age structure - Five year age groups
Gnangara - Total persons (Usual residence)
This table summarises five year age groups for Gnangara in 2021 for persons, with comparison against Wanneroo (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Gnangara, with comparison markers for Wanneroo (C).
0 to 4
2021 count
44
% of total
3.3%
Change from 2016
+1.1pp
44
3.3%
+1.1pp
5 to 9
2021 count
40
% of total
3.0%
Change from 2016
-1.6pp
40
3.0%
-1.6pp
10 to 14
2021 count
66
% of total
4.9%
Change from 2016
-1.0pp
66
4.9%
-1.0pp
15 to 19
2021 count
87
% of total
6.5%
Change from 2016
-2.7pp
87
6.5%
-2.7pp
20 to 24
2021 count
90
% of total
6.7%
Change from 2016
0.0pp
90
6.7%
0.0pp
25 to 29
2021 count
33
% of total
2.4%
Change from 2016
-1.7pp
33
2.4%
-1.7pp
30 to 34
2021 count
47
% of total
3.5%
Change from 2016
+0.6pp
47
3.5%
+0.6pp
35 to 39
2021 count
49
% of total
3.6%
Change from 2016
+0.1pp
49
3.6%
+0.1pp
40 to 44
2021 count
47
% of total
3.5%
Change from 2016
-2.5pp
47
3.5%
-2.5pp
45 to 49
2021 count
65
% of total
4.8%
Change from 2016
-1.6pp
65
4.8%
-1.6pp
50 to 54
2021 count
90
% of total
6.7%
Change from 2016
-3.7pp
90
6.7%
-3.7pp
55 to 59
2021 count
125
% of total
9.3%
Change from 2016
-1.2pp
125
9.3%
-1.2pp
60 to 64
2021 count
123
% of total
9.1%
Change from 2016
+1.7pp
123
9.1%
+1.7pp
65 to 69
2021 count
114
% of total
8.5%
Change from 2016
+1.3pp
114
8.5%
+1.3pp
70 to 74
2021 count
134
% of total
9.9%
Change from 2016
+4.7pp
134
9.9%
+4.7pp
75 to 79
2021 count
102
% of total
7.6%
Change from 2016
+3.5pp
102
7.6%
+3.5pp
80 to 84
2021 count
58
% of total
4.3%
Change from 2016
+1.5pp
58
4.3%
+1.5pp
85 and over
2021 count
36
% of total
2.7%
Change from 2016
+1.3pp
36
2.7%
+1.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+19
+1.1pp
5 to 9
-12
-1.6pp
10 to 14
0
-1.0pp
15 to 19
-16
-2.7pp
20 to 24
+15
0.0pp
25 to 29
-13
-1.7pp
30 to 34
+14
+0.6pp
35 to 39
+10
+0.1pp
40 to 44
-20
-2.5pp
45 to 49
-7
-1.6pp
50 to 54
-27
-3.7pp
55 to 59
+7
-1.2pp
60 to 64
+40
+1.7pp
65 to 69
+33
+1.3pp
70 to 74
+75
+4.7pp
75 to 79
+56
+3.5pp
80 to 84
+26
+1.5pp
85 and over
+20
+1.3pp
Data table
Five year age groups for Gnangara. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Wanneroo (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Wanneroo (C)% | Count | % | Wanneroo (C)% | Count | pp | |
| 0 to 4 | 44 | 3.3% | 7.1% | 25 | 2.2% | 8.0% | +19 | +1.1pp |
| 5 to 9 | 40 | 3.0% | 7.6% | 52 | 4.6% | 7.9% | -12 | -1.6pp |
| 10 to 14 | 66 | 4.9% | 7.4% | 66 | 5.9% | 7.1% | 0 | -1.0pp |
| 15 to 19 | 87 | 6.5% | 6.6% | 103 | 9.2% | 7.1% | -16 | -2.7pp |
| 20 to 24 | 90 | 6.7% | 6.4% | 75 | 6.7% | 6.8% | +15 | 0.0pp |
| 25 to 29 | 33 | 2.4% | 6.5% | 46 | 4.1% | 7.5% | -13 | -1.7pp |
| 30 to 34 | 47 | 3.5% | 7.4% | 33 | 2.9% | 8.1% | +14 | +0.6pp |
| 35 to 39 | 49 | 3.6% | 7.9% | 39 | 3.5% | 7.5% | +10 | +0.1pp |
| 40 to 44 | 47 | 3.5% | 6.9% | 67 | 6.0% | 7.6% | -20 | -2.5pp |
| 45 to 49 | 65 | 4.8% | 7.0% | 72 | 6.4% | 7.4% | -7 | -1.6pp |
| 50 to 54 | 90 | 6.7% | 6.7% | 117 | 10.4% | 6.2% | -27 | -3.7pp |
| 55 to 59 | 125 | 9.3% | 5.7% | 118 | 10.5% | 5.0% | +7 | -1.2pp |
| 60 to 64 | 123 | 9.1% | 4.7% | 83 | 7.4% | 3.9% | +40 | +1.7pp |
| 65 to 69 | 114 | 8.5% | 3.8% | 81 | 7.2% | 3.5% | +33 | +1.3pp |
| 70 to 74 | 134 | 9.9% | 3.3% | 59 | 5.2% | 2.4% | +75 | +4.7pp |
| 75 to 79 | 102 | 7.6% | 2.2% | 46 | 4.1% | 1.8% | +56 | +3.5pp |
| 80 to 84 | 58 | 4.3% | 1.5% | 32 | 2.8% | 1.2% | +26 | +1.5pp |
| 85 and over | 36 | 2.7% | 1.3% | 16 | 1.4% | 1.0% | +20 | +1.3pp |
| Total | 1,347 | 100.0% | 100.0% | 1,124 | 100.0% | 100.0% | +223 | 0.0pp |