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, 25 to 29 year olds was the largest age group among residents in Ngaanyatjarraku (S), accounting for 10% (136 people). This share was higher than Regional WA (5.9%). Since 2016, the biggest change was in 30 to 34 year olds, which decreased by 89 people and 4.5 percentage points.
Section overview
Age structure - Five year age groups
Ngaanyatjarraku (S) - Total persons (Usual residence)
This table summarises five year age groups for Ngaanyatjarraku (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 Ngaanyatjarraku (S), with comparison markers for Regional WA.
0 to 4
2021 count
85
% of total
6.3%
Change from 2016
-2.4pp
85
6.3%
-2.4pp
5 to 9
2021 count
106
% of total
7.8%
Change from 2016
-0.8pp
106
7.8%
-0.8pp
10 to 14
2021 count
107
% of total
7.9%
Change from 2016
0.0pp
107
7.9%
0.0pp
15 to 19
2021 count
129
% of total
9.5%
Change from 2016
+0.7pp
129
9.5%
+0.7pp
20 to 24
2021 count
107
% of total
7.9%
Change from 2016
-1.1pp
107
7.9%
-1.1pp
25 to 29
2021 count
136
% of total
10.0%
Change from 2016
+1.7pp
136
10.0%
+1.7pp
30 to 34
2021 count
85
% of total
6.3%
Change from 2016
-4.5pp
85
6.3%
-4.5pp
35 to 39
2021 count
111
% of total
8.2%
Change from 2016
+1.5pp
111
8.2%
+1.5pp
40 to 44
2021 count
97
% of total
7.1%
Change from 2016
-0.5pp
97
7.1%
-0.5pp
45 to 49
2021 count
85
% of total
6.3%
Change from 2016
+0.4pp
85
6.3%
+0.4pp
50 to 54
2021 count
85
% of total
6.3%
Change from 2016
+0.9pp
85
6.3%
+0.9pp
55 to 59
2021 count
84
% of total
6.2%
Change from 2016
+1.3pp
84
6.2%
+1.3pp
60 to 64
2021 count
58
% of total
4.3%
Change from 2016
+1.1pp
58
4.3%
+1.1pp
65 to 69
2021 count
29
% of total
2.1%
Change from 2016
-0.4pp
29
2.1%
-0.4pp
70 to 74
2021 count
17
% of total
1.3%
Change from 2016
-0.1pp
17
1.3%
-0.1pp
75 to 79
2021 count
3
% of total
0.2%
Change from 2016
-0.6pp
3
0.2%
-0.6pp
80 to 84
2021 count
7
% of total
0.5%
Change from 2016
+0.1pp
7
0.5%
+0.1pp
85 and over
2021 count
0
% of total
0.0%
Change from 2016
-0.2pp
0
0.0%
-0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-54
-2.4pp
5 to 9
-32
-0.8pp
10 to 14
-20
0.0pp
15 to 19
-12
+0.7pp
20 to 24
-38
-1.1pp
25 to 29
+3
+1.7pp
30 to 34
-89
-4.5pp
35 to 39
+4
+1.5pp
40 to 44
-25
-0.5pp
45 to 49
-9
+0.4pp
50 to 54
-2
+0.9pp
55 to 59
+6
+1.3pp
60 to 64
+6
+1.1pp
65 to 69
-11
-0.4pp
70 to 74
-5
-0.1pp
75 to 79
-10
-0.6pp
80 to 84
+1
+0.1pp
85 and over
-3
-0.2pp
Data table
Five year age groups for Ngaanyatjarraku (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 | 85 | 6.3% | 6.0% | 139 | 8.7% | 6.6% | -54 | -2.4pp |
| 5 to 9 | 106 | 7.8% | 6.7% | 138 | 8.6% | 7.1% | -32 | -0.8pp |
| 10 to 14 | 107 | 7.9% | 6.7% | 127 | 7.9% | 6.5% | -20 | 0.0pp |
| 15 to 19 | 129 | 9.5% | 5.5% | 141 | 8.8% | 5.7% | -12 | +0.7pp |
| 20 to 24 | 107 | 7.9% | 4.8% | 145 | 9.0% | 5.0% | -38 | -1.1pp |
| 25 to 29 | 136 | 10.0% | 5.9% | 133 | 8.3% | 6.5% | +3 | +1.7pp |
| 30 to 34 | 85 | 6.3% | 6.6% | 174 | 10.8% | 7.1% | -89 | -4.5pp |
| 35 to 39 | 111 | 8.2% | 6.8% | 107 | 6.7% | 6.7% | +4 | +1.5pp |
| 40 to 44 | 97 | 7.1% | 6.4% | 122 | 7.6% | 7.0% | -25 | -0.5pp |
| 45 to 49 | 85 | 6.3% | 6.6% | 94 | 5.9% | 7.2% | -9 | +0.4pp |
| 50 to 54 | 85 | 6.3% | 6.9% | 87 | 5.4% | 7.1% | -2 | +0.9pp |
| 55 to 59 | 84 | 6.2% | 6.8% | 78 | 4.9% | 6.9% | +6 | +1.3pp |
| 60 to 64 | 58 | 4.3% | 6.7% | 52 | 3.2% | 6.0% | +6 | +1.1pp |
| 65 to 69 | 29 | 2.1% | 5.7% | 40 | 2.5% | 5.3% | -11 | -0.4pp |
| 70 to 74 | 17 | 1.3% | 4.9% | 22 | 1.4% | 3.6% | -5 | -0.1pp |
| 75 to 79 | 3 | 0.2% | 3.2% | 13 | 0.8% | 2.6% | -10 | -0.6pp |
| 80 to 84 | 7 | 0.5% | 2.0% | 6 | 0.4% | 1.6% | +1 | +0.1pp |
| 85 and over | 0 | 0.0% | 1.7% | 3 | 0.2% | 1.5% | -3 | -0.2pp |
| Total | 1,358 | 100.0% | 100.0% | 1,606 | 100.0% | 100.0% | -248 | 0.0pp |