The chart below gives information about the age of women in Australia when they give birth to their first child in 1966 1986 and 2006

The bar chart compares the percentage of first time mothers of different ages in Australia in three separate years.
Overall, the age at which women gave birth to their first child increased over the period shown. Can register an upward trend about the proportion of first- time mothers in over 30 years old and the opposite trend in under 30 women.
In 1966, the women who delivering their first child between 20 and 24 accounting for the highest percentage ( about 60% ) , compared to around 35% who were young mother, aged 19 or under. But after forty years, the ratio in these two groups recorded a decline sharply to around 33% and 15%, respectively. The 25-30 age group recorded a slightly different pattern, with a rise of around 15% during the first twenty years, and a decline of nearly 10% twenty years later, down to just over 40%.
Moving on to the remaining age groups, the percentage of age groups 30-34 and 34-39 for first-time mothers experienced a significant increase in the 40-year period, from approximately 13% to 47% and from 8% to 30%, accordingly. The figures for women aged 40 or over register a fluctuate marginally around 2% and 4% during the same period.