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, 25 to 29 year olds was the largest age group among residents in Bonnyrigg Heights, accounting for 8% (592 people). This share was higher than Fairfield (C) (6.8%). Since 2016, the biggest change was in 25 to 29 year olds, which increased by 505 people and 5.1 percentage points.
Section overview
Age structure - Five year age groups
Bonnyrigg Heights - Total persons (Usual residence)
This table summarises five year age groups for Bonnyrigg Heights 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 Bonnyrigg Heights, with comparison markers for Fairfield (C).
0 to 4
2021 count
345
% of total
4.7%
Change from 2016
-0.2pp
345
4.7%
-0.2pp
5 to 9
2021 count
404
% of total
5.5%
Change from 2016
+0.2pp
404
5.5%
+0.2pp
10 to 14
2021 count
531
% of total
7.2%
Change from 2016
-0.3pp
531
7.2%
-0.3pp
15 to 19
2021 count
569
% of total
7.7%
Change from 2016
+0.5pp
569
7.7%
+0.5pp
20 to 24
2021 count
529
% of total
7.2%
Change from 2016
+4.3pp
529
7.2%
+4.3pp
25 to 29
2021 count
592
% of total
8.0%
Change from 2016
+5.1pp
592
8.0%
+5.1pp
30 to 34
2021 count
427
% of total
5.8%
Change from 2016
+2.0pp
427
5.8%
+2.0pp
35 to 39
2021 count
436
% of total
5.9%
Change from 2016
+1.2pp
436
5.9%
+1.2pp
40 to 44
2021 count
373
% of total
5.1%
Change from 2016
-1.2pp
373
5.1%
-1.2pp
45 to 49
2021 count
469
% of total
6.4%
Change from 2016
-1.1pp
469
6.4%
-1.1pp
50 to 54
2021 count
499
% of total
6.8%
Change from 2016
-1.6pp
499
6.8%
-1.6pp
55 to 59
2021 count
555
% of total
7.5%
Change from 2016
-0.7pp
555
7.5%
-0.7pp
60 to 64
2021 count
502
% of total
6.8%
Change from 2016
-0.3pp
502
6.8%
-0.3pp
65 to 69
2021 count
466
% of total
6.3%
Change from 2016
-2.0pp
466
6.3%
-2.0pp
70 to 74
2021 count
319
% of total
4.3%
Change from 2016
-2.9pp
319
4.3%
-2.9pp
75 to 79
2021 count
170
% of total
2.3%
Change from 2016
-2.4pp
170
2.3%
-2.4pp
80 to 84
2021 count
105
% of total
1.4%
Change from 2016
-0.9pp
105
1.4%
-0.9pp
85 and over
2021 count
85
% of total
1.2%
Change from 2016
-0.3pp
85
1.2%
-0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+200
-0.2pp
5 to 9
+246
+0.2pp
10 to 14
+308
-0.3pp
15 to 19
+355
+0.5pp
20 to 24
+443
+4.3pp
25 to 29
+505
+5.1pp
30 to 34
+314
+2.0pp
35 to 39
+297
+1.2pp
40 to 44
+186
-1.2pp
45 to 49
+247
-1.1pp
50 to 54
+248
-1.6pp
55 to 59
+310
-0.7pp
60 to 64
+290
-0.3pp
65 to 69
+219
-2.0pp
70 to 74
+105
-2.9pp
75 to 79
+30
-2.4pp
80 to 84
+37
-0.9pp
85 and over
+40
-0.3pp
Data table
Five year age groups for Bonnyrigg Heights. 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 | 345 | 4.7% | 5.2% | 145 | 4.9% | 6.1% | +200 | -0.2pp |
| 5 to 9 | 404 | 5.5% | 6.1% | 158 | 5.3% | 6.4% | +246 | +0.2pp |
| 10 to 14 | 531 | 7.2% | 6.6% | 223 | 7.5% | 6.6% | +308 | -0.3pp |
| 15 to 19 | 569 | 7.7% | 6.9% | 214 | 7.2% | 7.1% | +355 | +0.5pp |
| 20 to 24 | 529 | 7.2% | 7.0% | 86 | 2.9% | 7.7% | +443 | +4.3pp |
| 25 to 29 | 592 | 8.0% | 6.8% | 87 | 2.9% | 7.1% | +505 | +5.1pp |
| 30 to 34 | 427 | 5.8% | 6.2% | 113 | 3.8% | 6.6% | +314 | +2.0pp |
| 35 to 39 | 436 | 5.9% | 6.1% | 139 | 4.7% | 6.0% | +297 | +1.2pp |
| 40 to 44 | 373 | 5.1% | 5.9% | 187 | 6.3% | 6.4% | +186 | -1.2pp |
| 45 to 49 | 469 | 6.4% | 6.4% | 222 | 7.5% | 6.8% | +247 | -1.1pp |
| 50 to 54 | 499 | 6.8% | 6.7% | 251 | 8.4% | 6.8% | +248 | -1.6pp |
| 55 to 59 | 555 | 7.5% | 6.8% | 245 | 8.2% | 6.8% | +310 | -0.7pp |
| 60 to 64 | 502 | 6.8% | 6.6% | 212 | 7.1% | 5.7% | +290 | -0.3pp |
| 65 to 69 | 466 | 6.3% | 5.5% | 247 | 8.3% | 4.6% | +219 | -2.0pp |
| 70 to 74 | 319 | 4.3% | 4.3% | 214 | 7.2% | 3.1% | +105 | -2.9pp |
| 75 to 79 | 170 | 2.3% | 2.8% | 140 | 4.7% | 2.5% | +30 | -2.4pp |
| 80 to 84 | 105 | 1.4% | 2.1% | 68 | 2.3% | 1.8% | +37 | -0.9pp |
| 85 and over | 85 | 1.2% | 2.1% | 45 | 1.5% | 1.8% | +40 | -0.3pp |
| Total | 7,369 | 100.0% | 100.0% | 2,971 | 100.0% | 100.0% | +4,398 | 0.0pp |