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 Streaky Bay (DC), accounting for 9.6% (208 people). This share was higher than Regional SA (7.4%). Since 2016, the biggest change was in 65 to 69 year olds, which increased by 72 people and 3 percentage points.
Section overview
Age structure - Five year age groups
Streaky Bay (DC) - Total persons (Usual residence)
This table summarises five year age groups for Streaky Bay (DC) in 2021 for persons, with comparison against Regional SA and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Streaky Bay (DC), with comparison markers for Regional SA.
0 to 4
2021 count
118
% of total
5.5%
Change from 2016
-0.7pp
118
5.5%
-0.7pp
5 to 9
2021 count
148
% of total
6.8%
Change from 2016
-0.9pp
148
6.8%
-0.9pp
10 to 14
2021 count
141
% of total
6.5%
Change from 2016
+0.3pp
141
6.5%
+0.3pp
15 to 19
2021 count
77
% of total
3.6%
Change from 2016
+0.3pp
77
3.6%
+0.3pp
20 to 24
2021 count
68
% of total
3.1%
Change from 2016
-1.1pp
68
3.1%
-1.1pp
25 to 29
2021 count
120
% of total
5.5%
Change from 2016
+1.3pp
120
5.5%
+1.3pp
30 to 34
2021 count
100
% of total
4.6%
Change from 2016
-0.6pp
100
4.6%
-0.6pp
35 to 39
2021 count
115
% of total
5.3%
Change from 2016
+0.2pp
115
5.3%
+0.2pp
40 to 44
2021 count
125
% of total
5.8%
Change from 2016
-0.5pp
125
5.8%
-0.5pp
45 to 49
2021 count
131
% of total
6.1%
Change from 2016
-0.9pp
131
6.1%
-0.9pp
50 to 54
2021 count
135
% of total
6.2%
Change from 2016
-1.0pp
135
6.2%
-1.0pp
55 to 59
2021 count
145
% of total
6.7%
Change from 2016
-1.9pp
145
6.7%
-1.9pp
60 to 64
2021 count
187
% of total
8.6%
Change from 2016
-1.3pp
187
8.6%
-1.3pp
65 to 69
2021 count
208
% of total
9.6%
Change from 2016
+3.0pp
208
9.6%
+3.0pp
70 to 74
2021 count
140
% of total
6.5%
Change from 2016
+2.3pp
140
6.5%
+2.3pp
75 to 79
2021 count
88
% of total
4.1%
Change from 2016
+1.0pp
88
4.1%
+1.0pp
80 to 84
2021 count
50
% of total
2.3%
Change from 2016
+0.5pp
50
2.3%
+0.5pp
85 and over
2021 count
52
% of total
2.4%
Change from 2016
-0.1pp
52
2.4%
-0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-11
-0.7pp
5 to 9
-11
-0.9pp
10 to 14
+12
+0.3pp
15 to 19
+9
+0.3pp
20 to 24
-19
-1.1pp
25 to 29
+32
+1.3pp
30 to 34
-7
-0.6pp
35 to 39
+10
+0.2pp
40 to 44
-6
-0.5pp
45 to 49
-15
-0.9pp
50 to 54
-15
-1.0pp
55 to 59
-33
-1.9pp
60 to 64
-18
-1.3pp
65 to 69
+72
+3.0pp
70 to 74
+52
+2.3pp
75 to 79
+24
+1.0pp
80 to 84
+13
+0.5pp
85 and over
0
-0.1pp
Data table
Five year age groups for Streaky Bay (DC). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Regional SA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional SA% | Count | % | Regional SA% | Count | pp | |
| 0 to 4 | 118 | 5.5% | 4.9% | 129 | 6.2% | 5.5% | -11 | -0.7pp |
| 5 to 9 | 148 | 6.8% | 5.7% | 159 | 7.7% | 6.1% | -11 | -0.9pp |
| 10 to 14 | 141 | 6.5% | 6.1% | 129 | 6.2% | 6.0% | +12 | +0.3pp |
| 15 to 19 | 77 | 3.6% | 5.3% | 68 | 3.3% | 5.6% | +9 | +0.3pp |
| 20 to 24 | 68 | 3.1% | 4.6% | 87 | 4.2% | 4.8% | -19 | -1.1pp |
| 25 to 29 | 120 | 5.5% | 5.1% | 88 | 4.2% | 5.1% | +32 | +1.3pp |
| 30 to 34 | 100 | 4.6% | 5.4% | 107 | 5.2% | 5.3% | -7 | -0.6pp |
| 35 to 39 | 115 | 5.3% | 5.4% | 105 | 5.1% | 5.2% | +10 | +0.2pp |
| 40 to 44 | 125 | 5.8% | 5.2% | 131 | 6.3% | 5.9% | -6 | -0.5pp |
| 45 to 49 | 131 | 6.1% | 5.8% | 146 | 7.0% | 6.7% | -15 | -0.9pp |
| 50 to 54 | 135 | 6.2% | 6.7% | 150 | 7.2% | 7.1% | -15 | -1.0pp |
| 55 to 59 | 145 | 6.7% | 7.2% | 178 | 8.6% | 7.5% | -33 | -1.9pp |
| 60 to 64 | 187 | 8.6% | 7.7% | 205 | 9.9% | 7.3% | -18 | -1.3pp |
| 65 to 69 | 208 | 9.6% | 7.4% | 136 | 6.6% | 7.1% | +72 | +3.0pp |
| 70 to 74 | 140 | 6.5% | 6.8% | 88 | 4.2% | 5.5% | +52 | +2.3pp |
| 75 to 79 | 88 | 4.1% | 4.8% | 64 | 3.1% | 3.9% | +24 | +1.0pp |
| 80 to 84 | 50 | 2.3% | 3.1% | 37 | 1.8% | 2.6% | +13 | +0.5pp |
| 85 and over | 52 | 2.4% | 2.8% | 52 | 2.5% | 2.7% | 0 | -0.1pp |
| Total | 2,165 | 100.0% | 100.0% | 2,074 | 100.0% | 100.0% | +91 | 0.0pp |