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, 5 to 9 year olds was the largest age group among residents in Bucasia, accounting for 8.6% (424 people). This share was higher than Mackay (R) (6.8%). Since 2016, the biggest change was in 0 to 4 year olds, which decreased by 114 people and 2.7 percentage points.
Section overview
Age structure - Five year age groups
Bucasia - Total persons (Usual residence)
This table summarises five year age groups for Bucasia in 2021 for persons, with comparison against Mackay (R) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Bucasia, with comparison markers for Mackay (R).
0 to 4
2021 count
321
% of total
6.5%
Change from 2016
-2.7pp
321
6.5%
-2.7pp
5 to 9
2021 count
424
% of total
8.6%
Change from 2016
-0.2pp
424
8.6%
-0.2pp
10 to 14
2021 count
406
% of total
8.3%
Change from 2016
-0.4pp
406
8.3%
-0.4pp
15 to 19
2021 count
342
% of total
7.0%
Change from 2016
+0.6pp
342
7.0%
+0.6pp
20 to 24
2021 count
250
% of total
5.1%
Change from 2016
-0.2pp
250
5.1%
-0.2pp
25 to 29
2021 count
331
% of total
6.7%
Change from 2016
0.0pp
331
6.7%
0.0pp
30 to 34
2021 count
341
% of total
6.9%
Change from 2016
-0.9pp
341
6.9%
-0.9pp
35 to 39
2021 count
345
% of total
7.0%
Change from 2016
-1.3pp
345
7.0%
-1.3pp
40 to 44
2021 count
388
% of total
7.9%
Change from 2016
+1.0pp
388
7.9%
+1.0pp
45 to 49
2021 count
341
% of total
6.9%
Change from 2016
-0.6pp
341
6.9%
-0.6pp
50 to 54
2021 count
331
% of total
6.7%
Change from 2016
-0.7pp
331
6.7%
-0.7pp
55 to 59
2021 count
341
% of total
6.9%
Change from 2016
+1.0pp
341
6.9%
+1.0pp
60 to 64
2021 count
270
% of total
5.5%
Change from 2016
+1.6pp
270
5.5%
+1.6pp
65 to 69
2021 count
185
% of total
3.8%
Change from 2016
+0.4pp
185
3.8%
+0.4pp
70 to 74
2021 count
154
% of total
3.1%
Change from 2016
+0.8pp
154
3.1%
+0.8pp
75 to 79
2021 count
108
% of total
2.2%
Change from 2016
+1.1pp
108
2.2%
+1.1pp
80 to 84
2021 count
25
% of total
0.5%
Change from 2016
-0.2pp
25
0.5%
-0.2pp
85 and over
2021 count
25
% of total
0.5%
Change from 2016
+0.2pp
25
0.5%
+0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-114
-2.7pp
5 to 9
+7
-0.2pp
10 to 14
-4
-0.4pp
15 to 19
+40
+0.6pp
20 to 24
+2
-0.2pp
25 to 29
+15
0.0pp
30 to 34
-26
-0.9pp
35 to 39
-48
-1.3pp
40 to 44
+60
+1.0pp
45 to 49
-15
-0.6pp
50 to 54
-16
-0.7pp
55 to 59
+63
+1.0pp
60 to 64
+87
+1.6pp
65 to 69
+23
+0.4pp
70 to 74
+47
+0.8pp
75 to 79
+55
+1.1pp
80 to 84
-7
-0.2pp
85 and over
+13
+0.2pp
Data table
Five year age groups for Bucasia. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Mackay (R).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mackay (R)% | Count | % | Mackay (R)% | Count | pp | |
| 0 to 4 | 321 | 6.5% | 6.2% | 435 | 9.2% | 6.7% | -114 | -2.7pp |
| 5 to 9 | 424 | 8.6% | 6.8% | 417 | 8.8% | 7.1% | +7 | -0.2pp |
| 10 to 14 | 406 | 8.3% | 7.2% | 410 | 8.7% | 6.8% | -4 | -0.4pp |
| 15 to 19 | 342 | 7.0% | 6.1% | 302 | 6.4% | 6.3% | +40 | +0.6pp |
| 20 to 24 | 250 | 5.1% | 5.7% | 248 | 5.3% | 5.8% | +2 | -0.2pp |
| 25 to 29 | 331 | 6.7% | 6.3% | 316 | 6.7% | 6.5% | +15 | 0.0pp |
| 30 to 34 | 341 | 6.9% | 6.5% | 367 | 7.8% | 7.0% | -26 | -0.9pp |
| 35 to 39 | 345 | 7.0% | 7.0% | 393 | 8.3% | 6.4% | -48 | -1.3pp |
| 40 to 44 | 388 | 7.9% | 6.3% | 328 | 6.9% | 6.9% | +60 | +1.0pp |
| 45 to 49 | 341 | 6.9% | 6.6% | 356 | 7.5% | 7.4% | -15 | -0.6pp |
| 50 to 54 | 331 | 6.7% | 6.9% | 347 | 7.4% | 7.4% | -16 | -0.7pp |
| 55 to 59 | 341 | 6.9% | 6.9% | 278 | 5.9% | 6.9% | +63 | +1.0pp |
| 60 to 64 | 270 | 5.5% | 6.3% | 183 | 3.9% | 5.6% | +87 | +1.6pp |
| 65 to 69 | 185 | 3.8% | 5.1% | 162 | 3.4% | 4.5% | +23 | +0.4pp |
| 70 to 74 | 154 | 3.1% | 4.0% | 107 | 2.3% | 3.3% | +47 | +0.8pp |
| 75 to 79 | 108 | 2.2% | 2.8% | 53 | 1.1% | 2.3% | +55 | +1.1pp |
| 80 to 84 | 25 | 0.5% | 1.7% | 32 | 0.7% | 1.6% | -7 | -0.2pp |
| 85 and over | 25 | 0.5% | 1.6% | 12 | 0.3% | 1.4% | +13 | +0.2pp |
| Total | 4,915 | 100.0% | 100.0% | 4,722 | 100.0% | 100.0% | +193 | 0.0pp |