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South West GroupPopulation forecast

South West Group

Population and age structure

Between 2016 and 2026, the age structure forecasts for the South West Group indicate a 35.3% increase in population under working age, a 39.0% increase in population of retirement age, and a 25.5% increase in population of working age.

Knowledge of how the age structure of the population is changing is essential for planning age-based facilities and services, such as child care, recreation and aged care.

The forecast age groups of the South West Group is a function of the current age of the population (people aging each year, being born and dying) as well as the age of people migrating into and out of the area. This in turn is driven by location (fringe, city centre, regional or rural) the existing housing stock (separate dwellings, medium or high density), the amount and type of new residential development (same as existing stock, or diversifying) and where the area is in a cycle of change. We call this the area’s residential role and function. You can learn more about this in the section household and suburb life cycles.

Forecast age structure - 5 year age groups
South West Group - Total persons201620262036Change between 2016 and 2036
Age group (years)Number%Number%Number%Number
0 to 429,0046.939,5127.343,8967.0+14,892
5 to 928,6946.838,1117.042,4616.8+13,767
10 to 1425,3926.134,7926.439,8476.4+14,455
15 to 1925,9976.233,9856.339,2606.3+13,263
20 to 2429,1226.935,7196.641,3026.6+12,180
25 to 2931,7637.637,9887.042,7376.8+10,974
30 to 3432,3547.738,9347.243,3386.9+10,984
35 to 3929,2247.039,5497.343,7487.0+14,524
40 to 4429,4587.038,8457.242,9136.9+13,455
45 to 4929,1146.936,0256.641,6876.7+12,573
50 to 5427,2376.532,8226.138,7846.2+11,547
55 to 5924,3615.829,9595.534,6505.5+10,289
60 to 6421,0125.027,1985.031,2525.0+10,240
65 to 6918,2224.323,4194.327,7094.4+9,487
70 to 7413,2273.219,0713.524,0343.8+10,807
75 to 7910,0352.415,5022.919,8833.2+9,848
80 to 847,3661.810,3851.914,4952.3+7,129
85 and over7,5271.89,9921.813,5662.2+6,039
Total persons419,109100.0541,808100.0625,562100.0+206,453
Population and household forecasts, 2016 to 2036, prepared by .id (informed decisions), December 2017.

Key findings

In 2016, the dominant age structure for persons in the South West Group was ages 30 to 34, which accounted for 7.7% of the total persons.

The largest increase in persons between 2016 and 2026 is forecast to be in ages 0 to 4, which is expected to increase by 10,508 and account for 7.3% of the total persons.

The largest 5 year age group in 2026 is 35 to 39 years, with a total of 39,549 persons.

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