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, 40 to 44 year olds was the largest age group among residents in Rocky Cape (part), accounting for 12.8% (27 people). This share was higher than Circular Head (M) (5%). Since 2016, the biggest change was in 15 to 19 year olds, which decreased by 113 people and 0.8 percentage points.
Section overview
Age structure - Five year age groups
Rocky Cape (part) - Total persons (Usual residence)
This table summarises five year age groups for Rocky Cape (part) in 2021 for persons, with comparison against Circular Head (M) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Rocky Cape (part), with comparison markers for Circular Head (M).
0 to 4
2021 count
11
% of total
5.2%
Change from 2016
-0.8pp
11
5.2%
-0.8pp
5 to 9
2021 count
8
% of total
3.8%
Change from 2016
-3.1pp
8
3.8%
-3.1pp
10 to 14
2021 count
10
% of total
4.7%
Change from 2016
-1.7pp
10
4.7%
-1.7pp
15 to 19
2021 count
14
% of total
6.6%
Change from 2016
-0.8pp
14
6.6%
-0.8pp
20 to 24
2021 count
4
% of total
1.9%
Change from 2016
-3.9pp
4
1.9%
-3.9pp
25 to 29
2021 count
11
% of total
5.2%
Change from 2016
-0.3pp
11
5.2%
-0.3pp
30 to 34
2021 count
3
% of total
1.4%
Change from 2016
-3.9pp
3
1.4%
-3.9pp
35 to 39
2021 count
5
% of total
2.4%
Change from 2016
-4.3pp
5
2.4%
-4.3pp
40 to 44
2021 count
27
% of total
12.8%
Change from 2016
+6.4pp
27
12.8%
+6.4pp
45 to 49
2021 count
23
% of total
10.9%
Change from 2016
+3.7pp
23
10.9%
+3.7pp
50 to 54
2021 count
19
% of total
9.0%
Change from 2016
+1.5pp
19
9.0%
+1.5pp
55 to 59
2021 count
11
% of total
5.2%
Change from 2016
-1.2pp
11
5.2%
-1.2pp
60 to 64
2021 count
12
% of total
5.7%
Change from 2016
-0.7pp
12
5.7%
-0.7pp
65 to 69
2021 count
12
% of total
5.7%
Change from 2016
+0.5pp
12
5.7%
+0.5pp
70 to 74
2021 count
5
% of total
2.4%
Change from 2016
-2.7pp
5
2.4%
-2.7pp
75 to 79
2021 count
10
% of total
4.7%
Change from 2016
+1.7pp
10
4.7%
+1.7pp
80 to 84
2021 count
4
% of total
1.9%
Change from 2016
-0.1pp
4
1.9%
-0.1pp
85 and over
2021 count
4
% of total
1.9%
Change from 2016
+0.6pp
4
1.9%
+0.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-92
-0.8pp
5 to 9
-111
-3.1pp
10 to 14
-99
-1.7pp
15 to 19
-113
-0.8pp
20 to 24
-95
-3.9pp
25 to 29
-84
-0.3pp
30 to 34
-87
-3.9pp
35 to 39
-110
-4.3pp
40 to 44
-83
+6.4pp
45 to 49
-101
+3.7pp
50 to 54
-109
+1.5pp
55 to 59
-99
-1.2pp
60 to 64
-98
-0.7pp
65 to 69
-77
+0.5pp
70 to 74
-82
-2.7pp
75 to 79
-41
+1.7pp
80 to 84
-31
-0.1pp
85 and over
-19
+0.6pp
Data table
Five year age groups for Rocky Cape (part). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Circular Head (M).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Circular Head (M)% | Count | % | Circular Head (M)% | Count | pp | |
| 0 to 4 | 11 | 5.2% | 6.2% | 103 | 6.0% | 6.2% | -92 | -0.8pp |
| 5 to 9 | 8 | 3.8% | 6.1% | 119 | 6.9% | 7.6% | -111 | -3.1pp |
| 10 to 14 | 10 | 4.7% | 6.8% | 109 | 6.4% | 6.7% | -99 | -1.7pp |
| 15 to 19 | 14 | 6.6% | 5.9% | 127 | 7.4% | 6.3% | -113 | -0.8pp |
| 20 to 24 | 4 | 1.9% | 4.9% | 99 | 5.8% | 6.3% | -95 | -3.9pp |
| 25 to 29 | 11 | 5.2% | 6.7% | 95 | 5.5% | 5.1% | -84 | -0.3pp |
| 30 to 34 | 3 | 1.4% | 5.8% | 90 | 5.3% | 5.9% | -87 | -3.9pp |
| 35 to 39 | 5 | 2.4% | 6.1% | 115 | 6.7% | 5.0% | -110 | -4.3pp |
| 40 to 44 | 27 | 12.8% | 5.0% | 110 | 6.4% | 5.9% | -83 | +6.4pp |
| 45 to 49 | 23 | 10.9% | 5.6% | 124 | 7.2% | 6.5% | -101 | +3.7pp |
| 50 to 54 | 19 | 9.0% | 6.8% | 128 | 7.5% | 7.3% | -109 | +1.5pp |
| 55 to 59 | 11 | 5.2% | 6.9% | 110 | 6.4% | 8.0% | -99 | -1.2pp |
| 60 to 64 | 12 | 5.7% | 7.7% | 110 | 6.4% | 6.8% | -98 | -0.7pp |
| 65 to 69 | 12 | 5.7% | 6.7% | 89 | 5.2% | 5.6% | -77 | +0.5pp |
| 70 to 74 | 5 | 2.4% | 5.3% | 87 | 5.1% | 4.5% | -82 | -2.7pp |
| 75 to 79 | 10 | 4.7% | 3.6% | 51 | 3.0% | 2.6% | -41 | +1.7pp |
| 80 to 84 | 4 | 1.9% | 2.2% | 35 | 2.0% | 2.3% | -31 | -0.1pp |
| 85 and over | 4 | 1.9% | 2.1% | 23 | 1.3% | 1.4% | -19 | +0.6pp |
| Total | 211 | 100.0% | 100.0% | 1,713 | 100.0% | 100.0% | -1,502 | 0.0pp |