The provided graph compares figures for the birth rate of British women in different age groups over a period of 35 years.
In general, it is evident that the 25-29 group was the most common age to have a child. While there was a considerable decrease in the figure for teenagers (under 20), the opposite was true for that of people in their early and late thirties.
Initially, the proportion of women in their late twenties saw a fluctuation from 120 to 140, despite being at the top of 140 people. Conversely, the figure for people living in their forties and over was the lowest figure among all age groups, which witnessed a marginal decrease of 4%. In addition, both the number of early twenties and under 20 girls have a significant drop of 20%.
In 1973, there was an average of nearly 80 women having children in the age of 30 to 35, which nearly doubled the number of late-thirties women. Similar patterns can be seen in both former and latter figures in the following 35 years, which experienced an upward trend by 5% and over 20%, respectively.