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, 65 to 69 year olds was the largest age group among residents in Bridgetown-Greenbushes (S), accounting for 9.4% (490 people). This share was higher than Regional WA (5.7%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 144 people and 2.1 percentage points.
Section overview
Age structure - Five year age groups
Bridgetown-Greenbushes (S) - Total persons (Usual residence)
This table summarises five year age groups for Bridgetown-Greenbushes (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 Bridgetown-Greenbushes (S), with comparison markers for Regional WA.
0 to 4
2021 count
233
% of total
4.4%
Change from 2016
0.0pp
233
4.4%
0.0pp
5 to 9
2021 count
284
% of total
5.4%
Change from 2016
-0.9pp
284
5.4%
-0.9pp
10 to 14
2021 count
358
% of total
6.8%
Change from 2016
0.0pp
358
6.8%
0.0pp
15 to 19
2021 count
252
% of total
4.8%
Change from 2016
-0.9pp
252
4.8%
-0.9pp
20 to 24
2021 count
172
% of total
3.3%
Change from 2016
+0.5pp
172
3.3%
+0.5pp
25 to 29
2021 count
162
% of total
3.1%
Change from 2016
+0.2pp
162
3.1%
+0.2pp
30 to 34
2021 count
201
% of total
3.8%
Change from 2016
+0.4pp
201
3.8%
+0.4pp
35 to 39
2021 count
239
% of total
4.6%
Change from 2016
-0.1pp
239
4.6%
-0.1pp
40 to 44
2021 count
296
% of total
5.7%
Change from 2016
-0.5pp
296
5.7%
-0.5pp
45 to 49
2021 count
334
% of total
6.4%
Change from 2016
-0.4pp
334
6.4%
-0.4pp
50 to 54
2021 count
362
% of total
6.9%
Change from 2016
-0.9pp
362
6.9%
-0.9pp
55 to 59
2021 count
431
% of total
8.2%
Change from 2016
-0.1pp
431
8.2%
-0.1pp
60 to 64
2021 count
457
% of total
8.7%
Change from 2016
-0.6pp
457
8.7%
-0.6pp
65 to 69
2021 count
490
% of total
9.4%
Change from 2016
0.0pp
490
9.4%
0.0pp
70 to 74
2021 count
444
% of total
8.5%
Change from 2016
+2.1pp
444
8.5%
+2.1pp
75 to 79
2021 count
265
% of total
5.1%
Change from 2016
+1.0pp
265
5.1%
+1.0pp
80 to 84
2021 count
161
% of total
3.1%
Change from 2016
+1.0pp
161
3.1%
+1.0pp
85 and over
2021 count
102
% of total
1.9%
Change from 2016
0.0pp
102
1.9%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+30
0.0pp
5 to 9
-9
-0.9pp
10 to 14
+40
0.0pp
15 to 19
-13
-0.9pp
20 to 24
+40
+0.5pp
25 to 29
+26
+0.2pp
30 to 34
+43
+0.4pp
35 to 39
+18
-0.1pp
40 to 44
+9
-0.5pp
45 to 49
+19
-0.4pp
50 to 54
-2
-0.9pp
55 to 59
+46
-0.1pp
60 to 64
+23
-0.6pp
65 to 69
+52
0.0pp
70 to 74
+144
+2.1pp
75 to 79
+76
+1.0pp
80 to 84
+63
+1.0pp
85 and over
+12
0.0pp
Data table
Five year age groups for Bridgetown-Greenbushes (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 | 233 | 4.4% | 6.0% | 203 | 4.4% | 6.6% | +30 | 0.0pp |
| 5 to 9 | 284 | 5.4% | 6.7% | 293 | 6.3% | 7.1% | -9 | -0.9pp |
| 10 to 14 | 358 | 6.8% | 6.7% | 318 | 6.8% | 6.5% | +40 | 0.0pp |
| 15 to 19 | 252 | 4.8% | 5.5% | 265 | 5.7% | 5.7% | -13 | -0.9pp |
| 20 to 24 | 172 | 3.3% | 4.8% | 132 | 2.8% | 5.0% | +40 | +0.5pp |
| 25 to 29 | 162 | 3.1% | 5.9% | 136 | 2.9% | 6.5% | +26 | +0.2pp |
| 30 to 34 | 201 | 3.8% | 6.6% | 158 | 3.4% | 7.1% | +43 | +0.4pp |
| 35 to 39 | 239 | 4.6% | 6.8% | 221 | 4.7% | 6.7% | +18 | -0.1pp |
| 40 to 44 | 296 | 5.7% | 6.4% | 287 | 6.2% | 7.0% | +9 | -0.5pp |
| 45 to 49 | 334 | 6.4% | 6.6% | 315 | 6.8% | 7.2% | +19 | -0.4pp |
| 50 to 54 | 362 | 6.9% | 6.9% | 364 | 7.8% | 7.1% | -2 | -0.9pp |
| 55 to 59 | 431 | 8.2% | 6.8% | 385 | 8.3% | 6.9% | +46 | -0.1pp |
| 60 to 64 | 457 | 8.7% | 6.7% | 434 | 9.3% | 6.0% | +23 | -0.6pp |
| 65 to 69 | 490 | 9.4% | 5.7% | 438 | 9.4% | 5.3% | +52 | 0.0pp |
| 70 to 74 | 444 | 8.5% | 4.9% | 300 | 6.4% | 3.6% | +144 | +2.1pp |
| 75 to 79 | 265 | 5.1% | 3.2% | 189 | 4.1% | 2.6% | +76 | +1.0pp |
| 80 to 84 | 161 | 3.1% | 2.0% | 98 | 2.1% | 1.6% | +63 | +1.0pp |
| 85 and over | 102 | 1.9% | 1.7% | 90 | 1.9% | 1.5% | +12 | 0.0pp |
| Total | 5,238 | 100.0% | 100.0% | 4,660 | 100.0% | 100.0% | +578 | 0.0pp |