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 Mount Bryan, accounting for 24.6% (28 people). This share was higher than Goyder (DC) (10.5%). Since 2016, the biggest change was in 60 to 64 year olds, which increased by 22 people and 19.1 percentage points.
Section overview
Age structure - Five year age groups
Mount Bryan - Total persons (Usual residence)
This table summarises five year age groups for Mount Bryan in 2021 for persons, with comparison against Goyder (DC) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Mount Bryan, with comparison markers for Goyder (DC).
0 to 4
2021 count
3
% of total
2.6%
Change from 2016
-0.1pp
3
2.6%
-0.1pp
5 to 9
2021 count
5
% of total
4.4%
Change from 2016
-3.8pp
5
4.4%
-3.8pp
10 to 14
2021 count
11
% of total
9.6%
Change from 2016
+3.2pp
11
9.6%
+3.2pp
15 to 19
2021 count
5
% of total
4.4%
Change from 2016
+4.4pp
5
4.4%
+4.4pp
20 to 24
2021 count
0
% of total
0.0%
Change from 2016
-2.7pp
0
0.0%
-2.7pp
25 to 29
2021 count
0
% of total
0.0%
Change from 2016
-13.6pp
0
0.0%
-13.6pp
30 to 34
2021 count
9
% of total
7.9%
Change from 2016
+5.2pp
9
7.9%
+5.2pp
35 to 39
2021 count
0
% of total
0.0%
Change from 2016
-2.7pp
0
0.0%
-2.7pp
40 to 44
2021 count
5
% of total
4.4%
Change from 2016
-1.1pp
5
4.4%
-1.1pp
45 to 49
2021 count
0
% of total
0.0%
Change from 2016
-7.3pp
0
0.0%
-7.3pp
50 to 54
2021 count
15
% of total
13.2%
Change from 2016
+5.0pp
15
13.2%
+5.0pp
55 to 59
2021 count
3
% of total
2.6%
Change from 2016
-4.7pp
3
2.6%
-4.7pp
60 to 64
2021 count
28
% of total
24.6%
Change from 2016
+19.1pp
28
24.6%
+19.1pp
65 to 69
2021 count
12
% of total
10.5%
Change from 2016
+2.3pp
12
10.5%
+2.3pp
70 to 74
2021 count
8
% of total
7.0%
Change from 2016
+1.5pp
8
7.0%
+1.5pp
75 to 79
2021 count
3
% of total
2.6%
Change from 2016
-0.1pp
3
2.6%
-0.1pp
80 to 84
2021 count
0
% of total
0.0%
Change from 2016
-2.7pp
0
0.0%
-2.7pp
85 and over
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
0
-0.1pp
5 to 9
-4
-3.8pp
10 to 14
+4
+3.2pp
15 to 19
+5
+4.4pp
20 to 24
-3
-2.7pp
25 to 29
-15
-13.6pp
30 to 34
+6
+5.2pp
35 to 39
-3
-2.7pp
40 to 44
-1
-1.1pp
45 to 49
-8
-7.3pp
50 to 54
+6
+5.0pp
55 to 59
-5
-4.7pp
60 to 64
+22
+19.1pp
65 to 69
+3
+2.3pp
70 to 74
+2
+1.5pp
75 to 79
0
-0.1pp
80 to 84
-3
-2.7pp
85 and over
0
0.0pp
Data table
Five year age groups for Mount Bryan. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Goyder (DC).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Goyder (DC)% | Count | % | Goyder (DC)% | Count | pp | |
| 0 to 4 | 3 | 2.6% | 4.3% | 3 | 2.7% | 4.8% | 0 | -0.1pp |
| 5 to 9 | 5 | 4.4% | 5.3% | 9 | 8.2% | 5.2% | -4 | -3.8pp |
| 10 to 14 | 11 | 9.6% | 6.1% | 7 | 6.4% | 6.9% | +4 | +3.2pp |
| 15 to 19 | 5 | 4.4% | 5.3% | 0 | 0.0% | 5.1% | +5 | +4.4pp |
| 20 to 24 | 0 | 0.0% | 3.5% | 3 | 2.7% | 3.8% | -3 | -2.7pp |
| 25 to 29 | 0 | 0.0% | 4.0% | 15 | 13.6% | 4.5% | -15 | -13.6pp |
| 30 to 34 | 9 | 7.9% | 4.5% | 3 | 2.7% | 3.4% | +6 | +5.2pp |
| 35 to 39 | 0 | 0.0% | 4.1% | 3 | 2.7% | 4.7% | -3 | -2.7pp |
| 40 to 44 | 5 | 4.4% | 5.1% | 6 | 5.5% | 6.3% | -1 | -1.1pp |
| 45 to 49 | 0 | 0.0% | 5.4% | 8 | 7.3% | 6.6% | -8 | -7.3pp |
| 50 to 54 | 15 | 13.2% | 6.6% | 9 | 8.2% | 7.6% | +6 | +5.0pp |
| 55 to 59 | 3 | 2.6% | 8.0% | 8 | 7.3% | 9.5% | -5 | -4.7pp |
| 60 to 64 | 28 | 24.6% | 10.5% | 6 | 5.5% | 8.5% | +22 | +19.1pp |
| 65 to 69 | 12 | 10.5% | 9.2% | 9 | 8.2% | 7.8% | +3 | +2.3pp |
| 70 to 74 | 8 | 7.0% | 7.0% | 6 | 5.5% | 5.9% | +2 | +1.5pp |
| 75 to 79 | 3 | 2.6% | 5.2% | 3 | 2.7% | 4.0% | 0 | -0.1pp |
| 80 to 84 | 0 | 0.0% | 3.0% | 3 | 2.7% | 2.7% | -3 | -2.7pp |
| 85 and over | 0 | 0.0% | 2.7% | 0 | 0.0% | 2.1% | 0 | 0.0pp |
| Total | 114 | 100.0% | 100.0% | 110 | 100.0% | 100.0% | +4 | 0.0pp |