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, 55 to 59 year olds was the largest age group among residents in Lennard Brook, accounting for 16.3% (34 people). This share was higher than Gingin (S) (8.4%). Since 2016, the biggest change was in 55 to 59 year olds, which increased by 25 people and 11.7 percentage points.
Section overview
Age structure - Five year age groups
Lennard Brook - Total persons (Usual residence)
This table summarises five year age groups for Lennard Brook in 2021 for persons, with comparison against Gingin (S) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Lennard Brook, with comparison markers for Gingin (S).
0 to 4
2021 count
17
% of total
8.1%
Change from 2016
-1.2pp
17
8.1%
-1.2pp
5 to 9
2021 count
17
% of total
8.1%
Change from 2016
+6.6pp
17
8.1%
+6.6pp
10 to 14
2021 count
10
% of total
4.8%
Change from 2016
-2.4pp
10
4.8%
-2.4pp
15 to 19
2021 count
16
% of total
7.7%
Change from 2016
+3.1pp
16
7.7%
+3.1pp
20 to 24
2021 count
6
% of total
2.9%
Change from 2016
+0.8pp
6
2.9%
+0.8pp
25 to 29
2021 count
13
% of total
6.2%
Change from 2016
+1.0pp
13
6.2%
+1.0pp
30 to 34
2021 count
9
% of total
4.3%
Change from 2016
-0.3pp
9
4.3%
-0.3pp
35 to 39
2021 count
17
% of total
8.1%
Change from 2016
+5.0pp
17
8.1%
+5.0pp
40 to 44
2021 count
10
% of total
4.8%
Change from 2016
-0.4pp
10
4.8%
-0.4pp
45 to 49
2021 count
3
% of total
1.4%
Change from 2016
-3.8pp
3
1.4%
-3.8pp
50 to 54
2021 count
3
% of total
1.4%
Change from 2016
-10.5pp
3
1.4%
-10.5pp
55 to 59
2021 count
34
% of total
16.3%
Change from 2016
+11.7pp
34
16.3%
+11.7pp
60 to 64
2021 count
13
% of total
6.2%
Change from 2016
+2.6pp
13
6.2%
+2.6pp
65 to 69
2021 count
5
% of total
2.4%
Change from 2016
-2.2pp
5
2.4%
-2.2pp
70 to 74
2021 count
4
% of total
1.9%
Change from 2016
-5.8pp
4
1.9%
-5.8pp
75 to 79
2021 count
20
% of total
9.6%
Change from 2016
+8.1pp
20
9.6%
+8.1pp
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
0
% of total
0.0%
Change from 2016
-1.5pp
0
0.0%
-1.5pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-1
-1.2pp
5 to 9
+14
+6.6pp
10 to 14
-4
-2.4pp
15 to 19
+7
+3.1pp
20 to 24
+2
+0.8pp
25 to 29
+3
+1.0pp
30 to 34
0
-0.3pp
35 to 39
+11
+5.0pp
40 to 44
0
-0.4pp
45 to 49
-7
-3.8pp
50 to 54
-20
-10.5pp
55 to 59
+25
+11.7pp
60 to 64
+6
+2.6pp
65 to 69
-4
-2.2pp
70 to 74
-11
-5.8pp
75 to 79
+17
+8.1pp
80 to 84
0
0.0pp
85 and over
-3
-1.5pp
Data table
Five year age groups for Lennard Brook. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Gingin (S).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Gingin (S)% | Count | % | Gingin (S)% | Count | pp | |
| 0 to 4 | 17 | 8.1% | 4.4% | 18 | 9.3% | 4.8% | -1 | -1.2pp |
| 5 to 9 | 17 | 8.1% | 4.5% | 3 | 1.5% | 5.7% | +14 | +6.6pp |
| 10 to 14 | 10 | 4.8% | 5.3% | 14 | 7.2% | 6.4% | -4 | -2.4pp |
| 15 to 19 | 16 | 7.7% | 4.5% | 9 | 4.6% | 4.7% | +7 | +3.1pp |
| 20 to 24 | 6 | 2.9% | 3.8% | 4 | 2.1% | 3.8% | +2 | +0.8pp |
| 25 to 29 | 13 | 6.2% | 4.9% | 10 | 5.2% | 5.3% | +3 | +1.0pp |
| 30 to 34 | 9 | 4.3% | 5.2% | 9 | 4.6% | 4.3% | 0 | -0.3pp |
| 35 to 39 | 17 | 8.1% | 4.9% | 6 | 3.1% | 5.1% | +11 | +5.0pp |
| 40 to 44 | 10 | 4.8% | 5.5% | 10 | 5.2% | 5.7% | 0 | -0.4pp |
| 45 to 49 | 3 | 1.4% | 6.1% | 10 | 5.2% | 7.0% | -7 | -3.8pp |
| 50 to 54 | 3 | 1.4% | 7.9% | 23 | 11.9% | 7.2% | -20 | -10.5pp |
| 55 to 59 | 34 | 16.3% | 8.4% | 9 | 4.6% | 7.7% | +25 | +11.7pp |
| 60 to 64 | 13 | 6.2% | 7.4% | 7 | 3.6% | 8.9% | +6 | +2.6pp |
| 65 to 69 | 5 | 2.4% | 9.2% | 9 | 4.6% | 9.4% | -4 | -2.2pp |
| 70 to 74 | 4 | 1.9% | 7.7% | 15 | 7.7% | 6.0% | -11 | -5.8pp |
| 75 to 79 | 20 | 9.6% | 5.5% | 3 | 1.5% | 4.3% | +17 | +8.1pp |
| 80 to 84 | 0 | 0.0% | 2.9% | 0 | 0.0% | 2.1% | 0 | 0.0pp |
| 85 and over | 0 | 0.0% | 1.6% | 3 | 1.5% | 1.3% | -3 | -1.5pp |
| Total | 209 | 100.0% | 100.0% | 194 | 100.0% | 100.0% | +15 | 0.0pp |