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 Tammin (S), accounting for 12.4% (48 people). This share was higher than Regional WA (6.8%). Since 2016, the biggest change was in 5 to 9 year olds, which decreased by 18 people and 4.2 percentage points.
Section overview
Age structure - Five year age groups
Tammin (S) - Total persons (Usual residence)
This table summarises five year age groups for Tammin (S) in 2021 for persons, with comparison against Regional WA and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Tammin (S), with comparison markers for Regional WA.
0 to 4
2021 count
19
% of total
4.9%
Change from 2016
-0.1pp
19
4.9%
-0.1pp
5 to 9
2021 count
24
% of total
6.2%
Change from 2016
-4.2pp
24
6.2%
-4.2pp
10 to 14
2021 count
25
% of total
6.5%
Change from 2016
-0.5pp
25
6.5%
-0.5pp
15 to 19
2021 count
21
% of total
5.4%
Change from 2016
+2.7pp
21
5.4%
+2.7pp
20 to 24
2021 count
12
% of total
3.1%
Change from 2016
-1.9pp
12
3.1%
-1.9pp
25 to 29
2021 count
26
% of total
6.7%
Change from 2016
+1.7pp
26
6.7%
+1.7pp
30 to 34
2021 count
14
% of total
3.6%
Change from 2016
-2.1pp
14
3.6%
-2.1pp
35 to 39
2021 count
18
% of total
4.7%
Change from 2016
-4.3pp
18
4.7%
-4.3pp
40 to 44
2021 count
24
% of total
6.2%
Change from 2016
+1.0pp
24
6.2%
+1.0pp
45 to 49
2021 count
22
% of total
5.7%
Change from 2016
-1.5pp
22
5.7%
-1.5pp
50 to 54
2021 count
37
% of total
9.6%
Change from 2016
+3.1pp
37
9.6%
+3.1pp
55 to 59
2021 count
48
% of total
12.4%
Change from 2016
+4.7pp
48
12.4%
+4.7pp
60 to 64
2021 count
19
% of total
4.9%
Change from 2016
-1.1pp
19
4.9%
-1.1pp
65 to 69
2021 count
20
% of total
5.2%
Change from 2016
-0.5pp
20
5.2%
-0.5pp
70 to 74
2021 count
19
% of total
4.9%
Change from 2016
-1.8pp
19
4.9%
-1.8pp
75 to 79
2021 count
15
% of total
3.9%
Change from 2016
+1.9pp
15
3.9%
+1.9pp
80 to 84
2021 count
9
% of total
2.3%
Change from 2016
-0.2pp
9
2.3%
-0.2pp
85 and over
2021 count
3
% of total
0.8%
Change from 2016
+0.8pp
3
0.8%
+0.8pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-1
-0.1pp
5 to 9
-18
-4.2pp
10 to 14
-3
-0.5pp
15 to 19
+10
+2.7pp
20 to 24
-8
-1.9pp
25 to 29
+6
+1.7pp
30 to 34
-9
-2.1pp
35 to 39
-18
-4.3pp
40 to 44
+3
+1.0pp
45 to 49
-7
-1.5pp
50 to 54
+11
+3.1pp
55 to 59
+17
+4.7pp
60 to 64
-5
-1.1pp
65 to 69
-3
-0.5pp
70 to 74
-8
-1.8pp
75 to 79
+7
+1.9pp
80 to 84
-1
-0.2pp
85 and over
+3
+0.8pp
Data table
Five year age groups for Tammin (S). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Regional WA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional WA% | Count | % | Regional WA% | Count | pp | |
| 0 to 4 | 19 | 4.9% | 6.0% | 20 | 5.0% | 6.6% | -1 | -0.1pp |
| 5 to 9 | 24 | 6.2% | 6.7% | 42 | 10.4% | 7.1% | -18 | -4.2pp |
| 10 to 14 | 25 | 6.5% | 6.7% | 28 | 7.0% | 6.5% | -3 | -0.5pp |
| 15 to 19 | 21 | 5.4% | 5.5% | 11 | 2.7% | 5.7% | +10 | +2.7pp |
| 20 to 24 | 12 | 3.1% | 4.8% | 20 | 5.0% | 5.0% | -8 | -1.9pp |
| 25 to 29 | 26 | 6.7% | 5.9% | 20 | 5.0% | 6.5% | +6 | +1.7pp |
| 30 to 34 | 14 | 3.6% | 6.6% | 23 | 5.7% | 7.1% | -9 | -2.1pp |
| 35 to 39 | 18 | 4.7% | 6.8% | 36 | 9.0% | 6.7% | -18 | -4.3pp |
| 40 to 44 | 24 | 6.2% | 6.4% | 21 | 5.2% | 7.0% | +3 | +1.0pp |
| 45 to 49 | 22 | 5.7% | 6.6% | 29 | 7.2% | 7.2% | -7 | -1.5pp |
| 50 to 54 | 37 | 9.6% | 6.9% | 26 | 6.5% | 7.1% | +11 | +3.1pp |
| 55 to 59 | 48 | 12.4% | 6.8% | 31 | 7.7% | 6.9% | +17 | +4.7pp |
| 60 to 64 | 19 | 4.9% | 6.7% | 24 | 6.0% | 6.0% | -5 | -1.1pp |
| 65 to 69 | 20 | 5.2% | 5.7% | 23 | 5.7% | 5.3% | -3 | -0.5pp |
| 70 to 74 | 19 | 4.9% | 4.9% | 27 | 6.7% | 3.6% | -8 | -1.8pp |
| 75 to 79 | 15 | 3.9% | 3.2% | 8 | 2.0% | 2.6% | +7 | +1.9pp |
| 80 to 84 | 9 | 2.3% | 2.0% | 10 | 2.5% | 1.6% | -1 | -0.2pp |
| 85 and over | 3 | 0.8% | 1.7% | 0 | 0.0% | 1.5% | +3 | +0.8pp |
| Total | 386 | 100.0% | 100.0% | 402 | 100.0% | 100.0% | -16 | 0.0pp |