Births per 1,000 women, by age of mother
Fertility in Australia, 1991
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1991
Total fertility rate: 1.86
The total fertility rate of Australia was 1.86 children per woman in 1991 — below the replacement level of about 2.1. Births were most frequent among women aged 25-29 (133 per 1,000 women in that age group), and the average mother was 28.4 years old. In total, 259,333 babies were born. Source: United Nations, World Population Prospects 2024.
Key indicators, 1991
Total fertility rate
1.86
Births
259,333
Births per 1,000 people
14.9
Mean age of mothers
28.4
Births to mothers aged 15–19
5.7%
Net reproduction rate
0.89
Boys per 100 girls at birth
105.5
Population
17,353,193
The net reproduction rate counts only daughters who survive to their mothers' age: below 1, each generation of women is smaller than the one before.
Fertility by age of mother, 1991
| Mother's age | Births per 1,000 women | Share of total fertility | Births |
|---|---|---|---|
| 10-14 | 0.5 | 0.1% | 278 |
| 15-19 | 22.3 | 6.0% | 14,833 |
| 20-24 | 75.0 | 20.1% | 51,776 |
| 25-29 | 132.8 | 35.6% | 92,713 |
| 30-34 | 101.0 | 27.0% | 71,930 |
| 35-39 | 36.2 | 9.7% | 24,146 |
| 40-44 | 5.6 | 1.5% | 3,550 |
| 45-49 | 0.2 | 0.1% | 105 |
| 50-54 | 0.0 | 0.0% | 0 |
Fertility in Australia by year