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 Bordertown, accounting for 7.6% (235 people). This share was higher than Tatiara (DC) (6.6%). Since 2016, the biggest change was in 45 to 49 year olds, which decreased by 61 people and 2.3 percentage points.
Section overview
Age structure - Five year age groups
Bordertown - Total persons (Usual residence)
This table summarises five year age groups for Bordertown in 2021 for persons, with comparison against Tatiara (DC) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Bordertown, with comparison markers for Tatiara (DC).
0 to 4
2021 count
178
% of total
5.8%
Change from 2016
-0.5pp
178
5.8%
-0.5pp
5 to 9
2021 count
178
% of total
5.8%
Change from 2016
+0.2pp
178
5.8%
+0.2pp
10 to 14
2021 count
172
% of total
5.6%
Change from 2016
+0.5pp
172
5.6%
+0.5pp
15 to 19
2021 count
145
% of total
4.7%
Change from 2016
-1.7pp
145
4.7%
-1.7pp
20 to 24
2021 count
199
% of total
6.4%
Change from 2016
+0.2pp
199
6.4%
+0.2pp
25 to 29
2021 count
235
% of total
7.6%
Change from 2016
+1.3pp
235
7.6%
+1.3pp
30 to 34
2021 count
203
% of total
6.6%
Change from 2016
-0.1pp
203
6.6%
-0.1pp
35 to 39
2021 count
211
% of total
6.8%
Change from 2016
+1.2pp
211
6.8%
+1.2pp
40 to 44
2021 count
185
% of total
6.0%
Change from 2016
+0.8pp
185
6.0%
+0.8pp
45 to 49
2021 count
151
% of total
4.9%
Change from 2016
-2.3pp
151
4.9%
-2.3pp
50 to 54
2021 count
205
% of total
6.6%
Change from 2016
-0.1pp
205
6.6%
-0.1pp
55 to 59
2021 count
192
% of total
6.2%
Change from 2016
+1.0pp
192
6.2%
+1.0pp
60 to 64
2021 count
162
% of total
5.2%
Change from 2016
-0.3pp
162
5.2%
-0.3pp
65 to 69
2021 count
166
% of total
5.4%
Change from 2016
-0.1pp
166
5.4%
-0.1pp
70 to 74
2021 count
140
% of total
4.5%
Change from 2016
0.0pp
140
4.5%
0.0pp
75 to 79
2021 count
135
% of total
4.4%
Change from 2016
+0.3pp
135
4.4%
+0.3pp
80 to 84
2021 count
114
% of total
3.7%
Change from 2016
+0.4pp
114
3.7%
+0.4pp
85 and over
2021 count
115
% of total
3.7%
Change from 2016
-0.9pp
115
3.7%
-0.9pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-8
-0.5pp
5 to 9
+14
+0.2pp
10 to 14
+22
+0.5pp
15 to 19
-43
-1.7pp
20 to 24
+17
+0.2pp
25 to 29
+49
+1.3pp
30 to 34
+6
-0.1pp
35 to 39
+45
+1.2pp
40 to 44
+30
+0.8pp
45 to 49
-61
-2.3pp
50 to 54
+8
-0.1pp
55 to 59
+39
+1.0pp
60 to 64
-1
-0.3pp
65 to 69
+4
-0.1pp
70 to 74
+8
0.0pp
75 to 79
+13
+0.3pp
80 to 84
+16
+0.4pp
85 and over
-21
-0.9pp
Data table
Five year age groups for Bordertown. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Tatiara (DC).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Tatiara (DC)% | Count | % | Tatiara (DC)% | Count | pp | |
| 0 to 4 | 178 | 5.8% | 5.4% | 186 | 6.3% | 5.6% | -8 | -0.5pp |
| 5 to 9 | 178 | 5.8% | 5.6% | 164 | 5.6% | 6.9% | +14 | +0.2pp |
| 10 to 14 | 172 | 5.6% | 6.8% | 150 | 5.1% | 6.5% | +22 | +0.5pp |
| 15 to 19 | 145 | 4.7% | 5.3% | 188 | 6.4% | 6.2% | -43 | -1.7pp |
| 20 to 24 | 199 | 6.4% | 5.7% | 182 | 6.2% | 5.2% | +17 | +0.2pp |
| 25 to 29 | 235 | 7.6% | 6.6% | 186 | 6.3% | 5.1% | +49 | +1.3pp |
| 30 to 34 | 203 | 6.6% | 5.8% | 197 | 6.7% | 5.9% | +6 | -0.1pp |
| 35 to 39 | 211 | 6.8% | 6.1% | 166 | 5.6% | 5.9% | +45 | +1.2pp |
| 40 to 44 | 185 | 6.0% | 5.9% | 155 | 5.2% | 6.3% | +30 | +0.8pp |
| 45 to 49 | 151 | 4.9% | 6.4% | 212 | 7.2% | 7.5% | -61 | -2.3pp |
| 50 to 54 | 205 | 6.6% | 7.5% | 197 | 6.7% | 7.4% | +8 | -0.1pp |
| 55 to 59 | 192 | 6.2% | 7.0% | 153 | 5.2% | 6.4% | +39 | +1.0pp |
| 60 to 64 | 162 | 5.2% | 6.4% | 163 | 5.5% | 6.6% | -1 | -0.3pp |
| 65 to 69 | 166 | 5.4% | 5.9% | 162 | 5.5% | 5.9% | +4 | -0.1pp |
| 70 to 74 | 140 | 4.5% | 4.8% | 132 | 4.5% | 4.0% | +8 | 0.0pp |
| 75 to 79 | 135 | 4.4% | 3.6% | 122 | 4.1% | 3.2% | +13 | +0.3pp |
| 80 to 84 | 114 | 3.7% | 2.7% | 98 | 3.3% | 2.3% | +16 | +0.4pp |
| 85 and over | 115 | 3.7% | 2.5% | 136 | 4.6% | 3.0% | -21 | -0.9pp |
| Total | 3,095 | 100.0% | 100.0% | 2,953 | 100.0% | 100.0% | +142 | 0.0pp |