The bar chart provided demonstrates data on how old women from Australia were when they gave birth to their first child in 1966, 1986, and 2006.
Overall, it can be seen that the category of women whose age was 19 to 24 had undergone a decline over the years. Additionally, the percentage of women who were over 40 was the smallest among other age categories for the given years.
Looking into the details, it is seen that in 1966 the proportion of females at the age of 19 to 24, who gave birth to their first child was just over 60%, while in the same year the percentage of those who gave birth at the age of 40 or over was roughly at 0%. Bringing their first child to life, women whose age was under 19 were at 30%, whereas for women who were 25 to 30, the percentage was slightly higher than those who were under 19 at around 32%. Moreover, those who become a mother at the age of over 30 to 34 showed just over a tenth.
After 2 decades, there were significant changes regarding the age category of women, who were under 19 showing a downward trend to 20%, and women whose age was 19-24 saw a decline and it was approximately the same as for 25-30 in 1966. As regards 2006, females aged 30-34 was the highest age category and compared to previous years it was increased to over 40%. Moreover, women who were over 40 had undergone a slight increase as well.