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, 15 to 19 year olds was the largest age group among residents in Ridgley, accounting for 8.5% (55 people). This share was higher than Burnie (C) (6.2%). Since 2016, the biggest change was in 15 to 19 year olds, which increased by 48 people and 2.2 percentage points.
Section overview
Age structure - Five year age groups
Ridgley - Total persons (Usual residence)
This table summarises five year age groups for Ridgley in 2021 for persons, with comparison against Burnie (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Ridgley, with comparison markers for Burnie (C).
0 to 4
2021 count
45
% of total
7.0%
Change from 2016
+7.0pp
45
7.0%
+7.0pp
5 to 9
2021 count
29
% of total
4.5%
Change from 2016
+4.5pp
29
4.5%
+4.5pp
10 to 14
2021 count
32
% of total
5.0%
Change from 2016
-0.4pp
32
5.0%
-0.4pp
15 to 19
2021 count
55
% of total
8.5%
Change from 2016
+2.2pp
55
8.5%
+2.2pp
20 to 24
2021 count
47
% of total
7.3%
Change from 2016
+7.3pp
47
7.3%
+7.3pp
25 to 29
2021 count
42
% of total
6.5%
Change from 2016
+6.5pp
42
6.5%
+6.5pp
30 to 34
2021 count
37
% of total
5.7%
Change from 2016
+3.0pp
37
5.7%
+3.0pp
35 to 39
2021 count
37
% of total
5.7%
Change from 2016
+5.7pp
37
5.7%
+5.7pp
40 to 44
2021 count
32
% of total
5.0%
Change from 2016
+5.0pp
32
5.0%
+5.0pp
45 to 49
2021 count
55
% of total
8.5%
Change from 2016
-1.4pp
55
8.5%
-1.4pp
50 to 54
2021 count
47
% of total
7.3%
Change from 2016
-1.7pp
47
7.3%
-1.7pp
55 to 59
2021 count
32
% of total
5.0%
Change from 2016
-5.8pp
32
5.0%
-5.8pp
60 to 64
2021 count
47
% of total
7.3%
Change from 2016
-3.5pp
47
7.3%
-3.5pp
65 to 69
2021 count
39
% of total
6.0%
Change from 2016
-4.8pp
39
6.0%
-4.8pp
70 to 74
2021 count
34
% of total
5.3%
Change from 2016
+2.6pp
34
5.3%
+2.6pp
75 to 79
2021 count
23
% of total
3.6%
Change from 2016
+3.6pp
23
3.6%
+3.6pp
80 to 84
2021 count
9
% of total
1.4%
Change from 2016
-1.3pp
9
1.4%
-1.3pp
85 and over
2021 count
6
% of total
0.9%
Change from 2016
-3.6pp
6
0.9%
-3.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+45
+7.0pp
5 to 9
+29
+4.5pp
10 to 14
+26
-0.4pp
15 to 19
+48
+2.2pp
20 to 24
+47
+7.3pp
25 to 29
+42
+6.5pp
30 to 34
+34
+3.0pp
35 to 39
+37
+5.7pp
40 to 44
+32
+5.0pp
45 to 49
+44
-1.4pp
50 to 54
+37
-1.7pp
55 to 59
+20
-5.8pp
60 to 64
+35
-3.5pp
65 to 69
+27
-4.8pp
70 to 74
+31
+2.6pp
75 to 79
+23
+3.6pp
80 to 84
+6
-1.3pp
85 and over
+1
-3.6pp
Data table
Five year age groups for Ridgley. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Burnie (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Burnie (C)% | Count | % | Burnie (C)% | Count | pp | |
| 0 to 4 | 45 | 7.0% | 5.6% | 0 | 0.0% | 6.0% | +45 | +7.0pp |
| 5 to 9 | 29 | 4.5% | 6.0% | 0 | 0.0% | 6.1% | +29 | +4.5pp |
| 10 to 14 | 32 | 5.0% | 6.4% | 6 | 5.4% | 6.2% | +26 | -0.4pp |
| 15 to 19 | 55 | 8.5% | 6.2% | 7 | 6.3% | 7.3% | +48 | +2.2pp |
| 20 to 24 | 47 | 7.3% | 6.1% | 0 | 0.0% | 6.4% | +47 | +7.3pp |
| 25 to 29 | 42 | 6.5% | 7.0% | 0 | 0.0% | 5.9% | +42 | +6.5pp |
| 30 to 34 | 37 | 5.7% | 6.1% | 3 | 2.7% | 5.5% | +34 | +3.0pp |
| 35 to 39 | 37 | 5.7% | 5.8% | 0 | 0.0% | 5.5% | +37 | +5.7pp |
| 40 to 44 | 32 | 5.0% | 5.6% | 0 | 0.0% | 6.1% | +32 | +5.0pp |
| 45 to 49 | 55 | 8.5% | 6.3% | 11 | 9.9% | 6.7% | +44 | -1.4pp |
| 50 to 54 | 47 | 7.3% | 6.7% | 10 | 9.0% | 7.2% | +37 | -1.7pp |
| 55 to 59 | 32 | 5.0% | 6.8% | 12 | 10.8% | 6.9% | +20 | -5.8pp |
| 60 to 64 | 47 | 7.3% | 6.4% | 12 | 10.8% | 6.1% | +35 | -3.5pp |
| 65 to 69 | 39 | 6.0% | 5.4% | 12 | 10.8% | 5.8% | +27 | -4.8pp |
| 70 to 74 | 34 | 5.3% | 5.1% | 3 | 2.7% | 4.4% | +31 | +2.6pp |
| 75 to 79 | 23 | 3.6% | 3.6% | 0 | 0.0% | 3.5% | +23 | +3.6pp |
| 80 to 84 | 9 | 1.4% | 2.5% | 3 | 2.7% | 2.4% | +6 | -1.3pp |
| 85 and over | 6 | 0.9% | 2.2% | 5 | 4.5% | 2.3% | +1 | -3.6pp |
| Total | 645 | 100.0% | 100.0% | 111 | 100.0% | 100.0% | +534 | 0.0pp |