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, 30 to 34 year olds was the largest age group among residents in Upper Main Arm, accounting for 12.7% (36 people). This share was higher than Byron (A) (7.6%). Since 2016, the biggest change was in 30 to 34 year olds, which increased by 27 people and 8.7 percentage points.
Section overview
Age structure - Five year age groups
Upper Main Arm - Total persons (Usual residence)
This table summarises five year age groups for Upper Main Arm in 2021 for persons, with comparison against Byron (A) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Upper Main Arm, with comparison markers for Byron (A).
0 to 4
2021 count
16
% of total
5.7%
Change from 2016
+2.6pp
16
5.7%
+2.6pp
5 to 9
2021 count
5
% of total
1.8%
Change from 2016
-4.4pp
5
1.8%
-4.4pp
10 to 14
2021 count
20
% of total
7.1%
Change from 2016
+5.8pp
20
7.1%
+5.8pp
15 to 19
2021 count
11
% of total
3.9%
Change from 2016
+2.1pp
11
3.9%
+2.1pp
20 to 24
2021 count
13
% of total
4.6%
Change from 2016
+0.2pp
13
4.6%
+0.2pp
25 to 29
2021 count
10
% of total
3.5%
Change from 2016
+2.2pp
10
3.5%
+2.2pp
30 to 34
2021 count
36
% of total
12.7%
Change from 2016
+8.7pp
36
12.7%
+8.7pp
35 to 39
2021 count
7
% of total
2.5%
Change from 2016
-5.1pp
7
2.5%
-5.1pp
40 to 44
2021 count
19
% of total
6.7%
Change from 2016
-4.4pp
19
6.7%
-4.4pp
45 to 49
2021 count
23
% of total
8.1%
Change from 2016
+5.0pp
23
8.1%
+5.0pp
50 to 54
2021 count
19
% of total
6.7%
Change from 2016
-0.9pp
19
6.7%
-0.9pp
55 to 59
2021 count
25
% of total
8.8%
Change from 2016
-0.1pp
25
8.8%
-0.1pp
60 to 64
2021 count
18
% of total
6.4%
Change from 2016
-10.5pp
18
6.4%
-10.5pp
65 to 69
2021 count
20
% of total
7.1%
Change from 2016
-4.5pp
20
7.1%
-4.5pp
70 to 74
2021 count
8
% of total
2.8%
Change from 2016
-3.0pp
8
2.8%
-3.0pp
75 to 79
2021 count
0
% of total
0.0%
Change from 2016
-1.3pp
0
0.0%
-1.3pp
80 to 84
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
0.0pp
85 and over
2021 count
3
% of total
1.1%
Change from 2016
+1.1pp
3
1.1%
+1.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+9
+2.6pp
5 to 9
-9
-4.4pp
10 to 14
+17
+5.8pp
15 to 19
+7
+2.1pp
20 to 24
+3
+0.2pp
25 to 29
+7
+2.2pp
30 to 34
+27
+8.7pp
35 to 39
-10
-5.1pp
40 to 44
-6
-4.4pp
45 to 49
+16
+5.0pp
50 to 54
+2
-0.9pp
55 to 59
+5
-0.1pp
60 to 64
-20
-10.5pp
65 to 69
-6
-4.5pp
70 to 74
-5
-3.0pp
75 to 79
-3
-1.3pp
80 to 84
0
0.0pp
85 and over
+3
+1.1pp
Data table
Five year age groups for Upper Main Arm. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Byron (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Byron (A)% | Count | % | Byron (A)% | Count | pp | |
| 0 to 4 | 16 | 5.7% | 4.8% | 7 | 3.1% | 4.9% | +9 | +2.6pp |
| 5 to 9 | 5 | 1.8% | 5.5% | 14 | 6.2% | 5.9% | -9 | -4.4pp |
| 10 to 14 | 20 | 7.1% | 5.8% | 3 | 1.3% | 6.0% | +17 | +5.8pp |
| 15 to 19 | 11 | 3.9% | 4.7% | 4 | 1.8% | 5.1% | +7 | +2.1pp |
| 20 to 24 | 13 | 4.6% | 4.1% | 10 | 4.4% | 3.8% | +3 | +0.2pp |
| 25 to 29 | 10 | 3.5% | 5.9% | 3 | 1.3% | 5.2% | +7 | +2.2pp |
| 30 to 34 | 36 | 12.7% | 7.6% | 9 | 4.0% | 5.5% | +27 | +8.7pp |
| 35 to 39 | 7 | 2.5% | 7.3% | 17 | 7.6% | 6.3% | -10 | -5.1pp |
| 40 to 44 | 19 | 6.7% | 6.9% | 25 | 11.1% | 7.6% | -6 | -4.4pp |
| 45 to 49 | 23 | 8.1% | 7.5% | 7 | 3.1% | 7.6% | +16 | +5.0pp |
| 50 to 54 | 19 | 6.7% | 6.9% | 17 | 7.6% | 7.9% | +2 | -0.9pp |
| 55 to 59 | 25 | 8.8% | 6.9% | 20 | 8.9% | 8.7% | +5 | -0.1pp |
| 60 to 64 | 18 | 6.4% | 7.5% | 38 | 16.9% | 8.7% | -20 | -10.5pp |
| 65 to 69 | 20 | 7.1% | 7.1% | 26 | 11.6% | 6.6% | -6 | -4.5pp |
| 70 to 74 | 8 | 2.8% | 5.3% | 13 | 5.8% | 4.0% | -5 | -3.0pp |
| 75 to 79 | 0 | 0.0% | 2.9% | 3 | 1.3% | 2.4% | -3 | -1.3pp |
| 80 to 84 | 0 | 0.0% | 1.6% | 0 | 0.0% | 1.6% | 0 | 0.0pp |
| 85 and over | 3 | 1.1% | 1.6% | 0 | 0.0% | 2.2% | +3 | +1.1pp |
| Total | 283 | 100.0% | 100.0% | 225 | 100.0% | 100.0% | +58 | 0.0pp |