The bar chart depicts data on the percentage of women in Australia who had their first child in three different years: 1966, 1986, and 2006.
Overall, the percentage of women who are aged 24 and under and had their first child decreased over time, whereas the percentage of females who are above 25 fluctuated over the same timeline.
In 1966, the figure for females who were under 19 and had their first baby was around 33%, and this significantly decreased to around 11% by the year 2006. As for the group, aged from 19 to 24 years, their percentage also fell from just above 60% to below 30% in the same period.
For the 25- to 30-year-old females, their percentage fluctuated over the years, starting at 35% in 1966, rising in 1986 to 50%, and dropping back to almost the same figure in 1966. The only group that saw a steady increase was the 30- to 34-year-old one. They began with around 12% and grew up to 45% in 2006. Lastly, for the over-40-year-old group, their figures were stable most of the time.