The graph illustrates the adjustments in the birth rate of 6 different age groups in the UK between 1973 and 2008.
Overall, there was a decrease in the birth rate among people who aged between under 20 to 29 and the 40 and over age group, with the 20-25 group witnessing the most dramatic decline, while the birth rate of 30-to-39-year-olds experienced an upward trend. Additionally, the highest figure can be seen in the birth rate of 25-to-29-year-old people throughout the period.
Among the 20-35 group, the birth rate of people aged between 25 and 29 was relatively higher than the other two despite registering a moderate decrease from 140 to 120 people over the period. This closely resembled the figure for 20-to-25-years-olds, which exhibited a sharp reduction of around 30 from more than 120 in 1973. In contrast, there was just a gradual increase of around 10% in the data of the 30-35 age group between 1973 and 2008.
Regarding the remaining age groups, it is clear that both the birth rate of people aged under 20 or 40 and over were diminished gradually. Starting at 60 and 20, these figures were then shrunk to just around 40 and 17, respectively. On the other hand, the birth rate of the 35-39 age group escalated minimally to 41 in the first 15 years and surpassed the data of under 20, at around 53 in 1993 before increasing to more than 60 in the final year.