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, 85 and over year olds was the largest age group among residents in Yennora (part), accounting for 8.8% (147 people). This share was higher than Fairfield (C) (2.1%). Since 2016, the biggest change was in 25 to 29 year olds, which decreased by 2,014 people and 15 percentage points.
Section overview
Age structure - Five year age groups
Yennora (part) - Total persons (Usual residence)
This table summarises five year age groups for Yennora (part) in 2021 for persons, with comparison against Fairfield (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Yennora (part), with comparison markers for Fairfield (C).
0 to 4
2021 count
94
% of total
5.6%
Change from 2016
+0.6pp
94
5.6%
+0.6pp
5 to 9
2021 count
89
% of total
5.3%
Change from 2016
+3.2pp
89
5.3%
+3.2pp
10 to 14
2021 count
94
% of total
5.6%
Change from 2016
+4.5pp
94
5.6%
+4.5pp
15 to 19
2021 count
101
% of total
6.0%
Change from 2016
-1.5pp
101
6.0%
-1.5pp
20 to 24
2021 count
123
% of total
7.3%
Change from 2016
-13.3pp
123
7.3%
-13.3pp
25 to 29
2021 count
101
% of total
6.0%
Change from 2016
-15.0pp
101
6.0%
-15.0pp
30 to 34
2021 count
96
% of total
5.7%
Change from 2016
-10.7pp
96
5.7%
-10.7pp
35 to 39
2021 count
97
% of total
5.8%
Change from 2016
-2.5pp
97
5.8%
-2.5pp
40 to 44
2021 count
85
% of total
5.1%
Change from 2016
+0.4pp
85
5.1%
+0.4pp
45 to 49
2021 count
83
% of total
5.0%
Change from 2016
+1.4pp
83
5.0%
+1.4pp
50 to 54
2021 count
91
% of total
5.4%
Change from 2016
+2.3pp
91
5.4%
+2.3pp
55 to 59
2021 count
102
% of total
6.1%
Change from 2016
+4.0pp
102
6.1%
+4.0pp
60 to 64
2021 count
85
% of total
5.1%
Change from 2016
+3.5pp
85
5.1%
+3.5pp
65 to 69
2021 count
88
% of total
5.3%
Change from 2016
+4.1pp
88
5.3%
+4.1pp
70 to 74
2021 count
89
% of total
5.3%
Change from 2016
+4.6pp
89
5.3%
+4.6pp
75 to 79
2021 count
59
% of total
3.5%
Change from 2016
+3.1pp
59
3.5%
+3.1pp
80 to 84
2021 count
67
% of total
4.0%
Change from 2016
+3.8pp
67
4.0%
+3.8pp
85 and over
2021 count
147
% of total
8.8%
Change from 2016
+8.7pp
147
8.8%
+8.7pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-410
+0.6pp
5 to 9
-121
+3.2pp
10 to 14
-18
+4.5pp
15 to 19
-651
-1.5pp
20 to 24
-1,956
-13.3pp
25 to 29
-2,014
-15.0pp
30 to 34
-1,560
-10.7pp
35 to 39
-744
-2.5pp
40 to 44
-388
+0.4pp
45 to 49
-283
+1.4pp
50 to 54
-224
+2.3pp
55 to 59
-106
+4.0pp
60 to 64
-76
+3.5pp
65 to 69
-37
+4.1pp
70 to 74
+19
+4.6pp
75 to 79
+16
+3.1pp
80 to 84
+45
+3.8pp
85 and over
+141
+8.7pp
Data table
Five year age groups for Yennora (part). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Fairfield (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Fairfield (C)% | Count | % | Fairfield (C)% | Count | pp | |
| 0 to 4 | 94 | 5.6% | 5.2% | 504 | 5.0% | 6.1% | -410 | +0.6pp |
| 5 to 9 | 89 | 5.3% | 6.1% | 210 | 2.1% | 6.4% | -121 | +3.2pp |
| 10 to 14 | 94 | 5.6% | 6.6% | 112 | 1.1% | 6.6% | -18 | +4.5pp |
| 15 to 19 | 101 | 6.0% | 6.9% | 752 | 7.5% | 7.1% | -651 | -1.5pp |
| 20 to 24 | 123 | 7.3% | 7.0% | 2,079 | 20.6% | 7.7% | -1,956 | -13.3pp |
| 25 to 29 | 101 | 6.0% | 6.8% | 2,115 | 21.0% | 7.1% | -2,014 | -15.0pp |
| 30 to 34 | 96 | 5.7% | 6.2% | 1,656 | 16.4% | 6.6% | -1,560 | -10.7pp |
| 35 to 39 | 97 | 5.8% | 6.1% | 841 | 8.3% | 6.0% | -744 | -2.5pp |
| 40 to 44 | 85 | 5.1% | 5.9% | 473 | 4.7% | 6.4% | -388 | +0.4pp |
| 45 to 49 | 83 | 5.0% | 6.4% | 366 | 3.6% | 6.8% | -283 | +1.4pp |
| 50 to 54 | 91 | 5.4% | 6.7% | 315 | 3.1% | 6.8% | -224 | +2.3pp |
| 55 to 59 | 102 | 6.1% | 6.8% | 208 | 2.1% | 6.8% | -106 | +4.0pp |
| 60 to 64 | 85 | 5.1% | 6.6% | 161 | 1.6% | 5.7% | -76 | +3.5pp |
| 65 to 69 | 88 | 5.3% | 5.5% | 125 | 1.2% | 4.6% | -37 | +4.1pp |
| 70 to 74 | 89 | 5.3% | 4.3% | 70 | 0.7% | 3.1% | +19 | +4.6pp |
| 75 to 79 | 59 | 3.5% | 2.8% | 43 | 0.4% | 2.5% | +16 | +3.1pp |
| 80 to 84 | 67 | 4.0% | 2.1% | 22 | 0.2% | 1.8% | +45 | +3.8pp |
| 85 and over | 147 | 8.8% | 2.1% | 6 | 0.1% | 1.8% | +141 | +8.7pp |
| Total | 1,675 | 100.0% | 100.0% | 10,078 | 100.0% | 100.0% | -8,403 | 0.0pp |