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, 15 to 19 year olds was the largest age group among residents in Truro (part), accounting for 8.6% (45 people). This share was higher than Mid Murray (DC) (4.4%). Since 2016, the biggest change was in 25 to 29 year olds, which decreased by 302 people and 3 percentage points.
Section overview
Age structure - Five year age groups
Truro (part) - Total persons (Usual residence)
This table summarises five year age groups for Truro (part) in 2021 for persons, with comparison against Mid Murray (DC) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Truro (part), with comparison markers for Mid Murray (DC).
0 to 4
2021 count
28
% of total
5.4%
Change from 2016
+0.1pp
28
5.4%
+0.1pp
5 to 9
2021 count
35
% of total
6.7%
Change from 2016
+1.7pp
35
6.7%
+1.7pp
10 to 14
2021 count
30
% of total
5.7%
Change from 2016
+0.8pp
30
5.7%
+0.8pp
15 to 19
2021 count
45
% of total
8.6%
Change from 2016
+2.8pp
45
8.6%
+2.8pp
20 to 24
2021 count
20
% of total
3.8%
Change from 2016
-3.5pp
20
3.8%
-3.5pp
25 to 29
2021 count
27
% of total
5.2%
Change from 2016
-3.0pp
27
5.2%
-3.0pp
30 to 34
2021 count
36
% of total
6.9%
Change from 2016
-1.0pp
36
6.9%
-1.0pp
35 to 39
2021 count
35
% of total
6.7%
Change from 2016
+0.3pp
35
6.7%
+0.3pp
40 to 44
2021 count
37
% of total
7.1%
Change from 2016
-0.3pp
37
7.1%
-0.3pp
45 to 49
2021 count
27
% of total
5.2%
Change from 2016
-2.1pp
27
5.2%
-2.1pp
50 to 54
2021 count
45
% of total
8.6%
Change from 2016
+1.9pp
45
8.6%
+1.9pp
55 to 59
2021 count
40
% of total
7.6%
Change from 2016
+2.0pp
40
7.6%
+2.0pp
60 to 64
2021 count
30
% of total
5.7%
Change from 2016
-0.5pp
30
5.7%
-0.5pp
65 to 69
2021 count
36
% of total
6.9%
Change from 2016
+1.4pp
36
6.9%
+1.4pp
70 to 74
2021 count
35
% of total
6.7%
Change from 2016
+2.3pp
35
6.7%
+2.3pp
75 to 79
2021 count
8
% of total
1.5%
Change from 2016
-1.8pp
8
1.5%
-1.8pp
80 to 84
2021 count
9
% of total
1.7%
Change from 2016
-0.1pp
9
1.7%
-0.1pp
85 and over
2021 count
0
% of total
0.0%
Change from 2016
-1.6pp
0
0.0%
-1.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-184
+0.1pp
5 to 9
-166
+1.7pp
10 to 14
-166
+0.8pp
15 to 19
-188
+2.8pp
20 to 24
-273
-3.5pp
25 to 29
-302
-3.0pp
30 to 34
-280
-1.0pp
35 to 39
-220
+0.3pp
40 to 44
-258
-0.3pp
45 to 49
-264
-2.1pp
50 to 54
-225
+1.9pp
55 to 59
-185
+2.0pp
60 to 64
-217
-0.5pp
65 to 69
-183
+1.4pp
70 to 74
-141
+2.3pp
75 to 79
-125
-1.8pp
80 to 84
-63
-0.1pp
85 and over
-64
-1.6pp
Data table
Five year age groups for Truro (part). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Mid Murray (DC).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mid Murray (DC)% | Count | % | Mid Murray (DC)% | Count | pp | |
| 0 to 4 | 28 | 5.4% | 3.6% | 212 | 5.3% | 4.1% | -184 | +0.1pp |
| 5 to 9 | 35 | 6.7% | 4.3% | 201 | 5.0% | 4.4% | -166 | +1.7pp |
| 10 to 14 | 30 | 5.7% | 4.9% | 196 | 4.9% | 4.7% | -166 | +0.8pp |
| 15 to 19 | 45 | 8.6% | 4.4% | 233 | 5.8% | 4.8% | -188 | +2.8pp |
| 20 to 24 | 20 | 3.8% | 3.4% | 293 | 7.3% | 4.0% | -273 | -3.5pp |
| 25 to 29 | 27 | 5.2% | 3.8% | 329 | 8.2% | 3.9% | -302 | -3.0pp |
| 30 to 34 | 36 | 6.9% | 4.1% | 316 | 7.9% | 4.5% | -280 | -1.0pp |
| 35 to 39 | 35 | 6.7% | 4.4% | 255 | 6.4% | 4.2% | -220 | +0.3pp |
| 40 to 44 | 37 | 7.1% | 4.6% | 295 | 7.4% | 5.8% | -258 | -0.3pp |
| 45 to 49 | 27 | 5.2% | 5.9% | 291 | 7.3% | 7.0% | -264 | -2.1pp |
| 50 to 54 | 45 | 8.6% | 7.3% | 270 | 6.7% | 8.5% | -225 | +1.9pp |
| 55 to 59 | 40 | 7.6% | 9.2% | 225 | 5.6% | 8.8% | -185 | +2.0pp |
| 60 to 64 | 30 | 5.7% | 9.7% | 247 | 6.2% | 9.4% | -217 | -0.5pp |
| 65 to 69 | 36 | 6.9% | 10.1% | 219 | 5.5% | 9.5% | -183 | +1.4pp |
| 70 to 74 | 35 | 6.7% | 9.0% | 176 | 4.4% | 6.7% | -141 | +2.3pp |
| 75 to 79 | 8 | 1.5% | 5.3% | 133 | 3.3% | 4.8% | -125 | -1.8pp |
| 80 to 84 | 9 | 1.7% | 3.4% | 72 | 1.8% | 2.3% | -63 | -0.1pp |
| 85 and over | 0 | 0.0% | 2.3% | 64 | 1.6% | 2.2% | -64 | -1.6pp |
| Total | 523 | 100.0% | 100.0% | 4,006 | 100.0% | 100.0% | -3,483 | 0.0pp |