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 Coochiemudlo Island, accounting for 14.6% (124 people). This share was higher than Redland (C) (5.7%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 43 people and 3.8 percentage points.
Section overview
Age structure - Five year age groups
Coochiemudlo Island - Total persons (Usual residence)
This table summarises five year age groups for Coochiemudlo Island in 2021 for persons, with comparison against Redland (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Coochiemudlo Island, with comparison markers for Redland (C).
0 to 4
2021 count
12
% of total
1.4%
Change from 2016
-0.5pp
12
1.4%
-0.5pp
5 to 9
2021 count
18
% of total
2.1%
Change from 2016
-2.8pp
18
2.1%
-2.8pp
10 to 14
2021 count
35
% of total
4.1%
Change from 2016
-0.7pp
35
4.1%
-0.7pp
15 to 19
2021 count
25
% of total
2.9%
Change from 2016
-1.0pp
25
2.9%
-1.0pp
20 to 24
2021 count
17
% of total
2.0%
Change from 2016
-0.1pp
17
2.0%
-0.1pp
25 to 29
2021 count
20
% of total
2.4%
Change from 2016
+0.7pp
20
2.4%
+0.7pp
30 to 34
2021 count
19
% of total
2.2%
Change from 2016
-0.2pp
19
2.2%
-0.2pp
35 to 39
2021 count
33
% of total
3.9%
Change from 2016
+2.0pp
33
3.9%
+2.0pp
40 to 44
2021 count
10
% of total
1.2%
Change from 2016
-4.5pp
10
1.2%
-4.5pp
45 to 49
2021 count
50
% of total
5.9%
Change from 2016
-1.1pp
50
5.9%
-1.1pp
50 to 54
2021 count
59
% of total
6.9%
Change from 2016
-0.8pp
59
6.9%
-0.8pp
55 to 59
2021 count
89
% of total
10.5%
Change from 2016
+1.5pp
89
10.5%
+1.5pp
60 to 64
2021 count
120
% of total
14.1%
Change from 2016
+1.6pp
120
14.1%
+1.6pp
65 to 69
2021 count
111
% of total
13.1%
Change from 2016
-1.9pp
111
13.1%
-1.9pp
70 to 74
2021 count
124
% of total
14.6%
Change from 2016
+3.8pp
124
14.6%
+3.8pp
75 to 79
2021 count
70
% of total
8.2%
Change from 2016
+2.6pp
70
8.2%
+2.6pp
80 to 84
2021 count
23
% of total
2.7%
Change from 2016
-1.2pp
23
2.7%
-1.2pp
85 and over
2021 count
25
% of total
2.9%
Change from 2016
+1.6pp
25
2.9%
+1.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-2
-0.5pp
5 to 9
-19
-2.8pp
10 to 14
-1
-0.7pp
15 to 19
-4
-1.0pp
20 to 24
+1
-0.1pp
25 to 29
+7
+0.7pp
30 to 34
+1
-0.2pp
35 to 39
+19
+2.0pp
40 to 44
-33
-4.5pp
45 to 49
-3
-1.1pp
50 to 54
+1
-0.8pp
55 to 59
+21
+1.5pp
60 to 64
+26
+1.6pp
65 to 69
-2
-1.9pp
70 to 74
+43
+3.8pp
75 to 79
+28
+2.6pp
80 to 84
-6
-1.2pp
85 and over
+15
+1.6pp
Data table
Five year age groups for Coochiemudlo Island. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Redland (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Redland (C)% | Count | % | Redland (C)% | Count | pp | |
| 0 to 4 | 12 | 1.4% | 5.1% | 14 | 1.9% | 5.5% | -2 | -0.5pp |
| 5 to 9 | 18 | 2.1% | 5.9% | 37 | 4.9% | 6.6% | -19 | -2.8pp |
| 10 to 14 | 35 | 4.1% | 6.8% | 36 | 4.8% | 6.7% | -1 | -0.7pp |
| 15 to 19 | 25 | 2.9% | 6.3% | 29 | 3.9% | 6.6% | -4 | -1.0pp |
| 20 to 24 | 17 | 2.0% | 5.1% | 16 | 2.1% | 5.6% | +1 | -0.1pp |
| 25 to 29 | 20 | 2.4% | 4.7% | 13 | 1.7% | 5.0% | +7 | +0.7pp |
| 30 to 34 | 19 | 2.2% | 5.4% | 18 | 2.4% | 5.7% | +1 | -0.2pp |
| 35 to 39 | 33 | 3.9% | 6.2% | 14 | 1.9% | 5.8% | +19 | +2.0pp |
| 40 to 44 | 10 | 1.2% | 6.1% | 43 | 5.7% | 6.8% | -33 | -4.5pp |
| 45 to 49 | 50 | 5.9% | 6.8% | 53 | 7.0% | 7.1% | -3 | -1.1pp |
| 50 to 54 | 59 | 6.9% | 6.9% | 58 | 7.7% | 7.3% | +1 | -0.8pp |
| 55 to 59 | 89 | 10.5% | 6.9% | 68 | 9.0% | 7.1% | +21 | +1.5pp |
| 60 to 64 | 120 | 14.1% | 6.8% | 94 | 12.5% | 6.4% | +26 | +1.6pp |
| 65 to 69 | 111 | 13.1% | 6.2% | 113 | 15.0% | 6.0% | -2 | -1.9pp |
| 70 to 74 | 124 | 14.6% | 5.7% | 81 | 10.8% | 4.5% | +43 | +3.8pp |
| 75 to 79 | 70 | 8.2% | 4.1% | 42 | 5.6% | 3.1% | +28 | +2.6pp |
| 80 to 84 | 23 | 2.7% | 2.5% | 29 | 3.9% | 2.1% | -6 | -1.2pp |
| 85 and over | 25 | 2.9% | 2.4% | 10 | 1.3% | 2.2% | +15 | +1.6pp |
| Total | 850 | 100.0% | 100.0% | 753 | 100.0% | 100.0% | +97 | 0.0pp |