The provided bar graph illustrates the distribution of ages at which women in Australia gave birth to their first child across three specific years: 1966, 1986, and 2006.
Overall, there is a clear trend of increasing age at first childbirth over the decades, with a noticeable decline in younger mothers and a gradual rise in the percentage of older mothers.
In 1966, the largest proportion of women giving birth to their first child were aged between 19 and 24, accounting for approximately 55%. The age group of under 19 represented a significant portion as well, at around 23%. Conversely, only a minimal number of women were aged 30 and above, with those aged 30-34 at 4%, 35-39 at 1%, and none giving birth over 40. By 1986, the landscape had shifted somewhat, as the percentage of women under 19 decreased to about 15%, while the 19-24 age group also saw a decline to roughly 40%. However, the 25-30 age bracket exhibited a notable increase, rising to 30%, indicative of changing societal norms surrounding motherhood.
By 2006, the trend further evolved, as the percentage of mothers under 19 declined significantly to around 8%, with the 19-24 group also dropping to 25%. Meanwhile, the age group 25-30 maintained a relatively stable figure at approximately 35%. Notably, there was a sharp rise in the 30-34 age bracket, which increased to 20%, and the 35-39 age group experienced a rise to 9%. Furthermore, the proportion of women giving birth over the age of 40 rose to 2%, illustrating a gradual shift toward later childbirth among Australian women.