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 Trott Park, accounting for 7.6% (237 people). This share was similar to Marion (C) (7.7%). Since 2016, the biggest change was in 65 to 69 year olds, which increased by 94 people and 3 percentage points.
Section overview
Age structure - Five year age groups
Trott Park - Total persons (Usual residence)
This table summarises five year age groups for Trott Park in 2021 for persons, with comparison against Marion (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Trott Park, with comparison markers for Marion (C).
0 to 4
2021 count
198
% of total
6.3%
Change from 2016
-0.3pp
198
6.3%
-0.3pp
5 to 9
2021 count
215
% of total
6.9%
Change from 2016
+0.2pp
215
6.9%
+0.2pp
10 to 14
2021 count
182
% of total
5.8%
Change from 2016
+1.3pp
182
5.8%
+1.3pp
15 to 19
2021 count
147
% of total
4.7%
Change from 2016
-1.8pp
147
4.7%
-1.8pp
20 to 24
2021 count
168
% of total
5.4%
Change from 2016
-0.6pp
168
5.4%
-0.6pp
25 to 29
2021 count
194
% of total
6.2%
Change from 2016
-1.2pp
194
6.2%
-1.2pp
30 to 34
2021 count
237
% of total
7.6%
Change from 2016
-0.8pp
237
7.6%
-0.8pp
35 to 39
2021 count
236
% of total
7.6%
Change from 2016
+0.9pp
236
7.6%
+0.9pp
40 to 44
2021 count
193
% of total
6.2%
Change from 2016
+0.6pp
193
6.2%
+0.6pp
45 to 49
2021 count
170
% of total
5.4%
Change from 2016
-1.0pp
170
5.4%
-1.0pp
50 to 54
2021 count
187
% of total
6.0%
Change from 2016
-0.8pp
187
6.0%
-0.8pp
55 to 59
2021 count
193
% of total
6.2%
Change from 2016
-1.1pp
193
6.2%
-1.1pp
60 to 64
2021 count
217
% of total
6.9%
Change from 2016
-0.6pp
217
6.9%
-0.6pp
65 to 69
2021 count
216
% of total
6.9%
Change from 2016
+3.0pp
216
6.9%
+3.0pp
70 to 74
2021 count
133
% of total
4.3%
Change from 2016
+1.9pp
133
4.3%
+1.9pp
75 to 79
2021 count
72
% of total
2.3%
Change from 2016
+0.3pp
72
2.3%
+0.3pp
80 to 84
2021 count
59
% of total
1.9%
Change from 2016
+0.1pp
59
1.9%
+0.1pp
85 and over
2021 count
108
% of total
3.5%
Change from 2016
+0.1pp
108
3.5%
+0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-7
-0.3pp
5 to 9
+8
+0.2pp
10 to 14
+41
+1.3pp
15 to 19
-55
-1.8pp
20 to 24
-17
-0.6pp
25 to 29
-37
-1.2pp
30 to 34
-25
-0.8pp
35 to 39
+29
+0.9pp
40 to 44
+18
+0.6pp
45 to 49
-28
-1.0pp
50 to 54
-25
-0.8pp
55 to 59
-35
-1.1pp
60 to 64
-15
-0.6pp
65 to 69
+94
+3.0pp
70 to 74
+59
+1.9pp
75 to 79
+9
+0.3pp
80 to 84
+3
+0.1pp
85 and over
+3
+0.1pp
Data table
Five year age groups for Trott Park. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Marion (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Marion (C)% | Count | % | Marion (C)% | Count | pp | |
| 0 to 4 | 198 | 6.3% | 5.4% | 205 | 6.6% | 5.9% | -7 | -0.3pp |
| 5 to 9 | 215 | 6.9% | 5.6% | 207 | 6.7% | 5.4% | +8 | +0.2pp |
| 10 to 14 | 182 | 5.8% | 5.2% | 141 | 4.5% | 4.9% | +41 | +1.3pp |
| 15 to 19 | 147 | 4.7% | 5.1% | 202 | 6.5% | 5.7% | -55 | -1.8pp |
| 20 to 24 | 168 | 5.4% | 6.7% | 185 | 6.0% | 7.2% | -17 | -0.6pp |
| 25 to 29 | 194 | 6.2% | 7.4% | 231 | 7.4% | 7.3% | -37 | -1.2pp |
| 30 to 34 | 237 | 7.6% | 7.7% | 262 | 8.4% | 7.5% | -25 | -0.8pp |
| 35 to 39 | 236 | 7.6% | 7.5% | 207 | 6.7% | 6.8% | +29 | +0.9pp |
| 40 to 44 | 193 | 6.2% | 6.6% | 175 | 5.6% | 6.4% | +18 | +0.6pp |
| 45 to 49 | 170 | 5.4% | 6.1% | 198 | 6.4% | 6.3% | -28 | -1.0pp |
| 50 to 54 | 187 | 6.0% | 5.9% | 212 | 6.8% | 6.4% | -25 | -0.8pp |
| 55 to 59 | 193 | 6.2% | 5.9% | 228 | 7.3% | 6.6% | -35 | -1.1pp |
| 60 to 64 | 217 | 6.9% | 6.1% | 232 | 7.5% | 6.2% | -15 | -0.6pp |
| 65 to 69 | 216 | 6.9% | 5.7% | 122 | 3.9% | 5.2% | +94 | +3.0pp |
| 70 to 74 | 133 | 4.3% | 4.8% | 74 | 2.4% | 3.7% | +59 | +1.9pp |
| 75 to 79 | 72 | 2.3% | 3.3% | 63 | 2.0% | 2.9% | +9 | +0.3pp |
| 80 to 84 | 59 | 1.9% | 2.3% | 56 | 1.8% | 2.4% | +3 | +0.1pp |
| 85 and over | 108 | 3.5% | 2.9% | 105 | 3.4% | 3.1% | +3 | +0.1pp |
| Total | 3,124 | 100.0% | 100.0% | 3,105 | 100.0% | 100.0% | +19 | 0.0pp |