The charts illustrate and compare the population of a UK town and its demographic changes between 1951 and 2011.
It is clear from the charts that the population of the town showed an upward trend from 1951 to 1991, rising from 100,000 to 200,000. However, in 2011, this growth trend stopped, and the population decreased from 200,000 to around 160,000.
The second bar chart provides a breakdown of demographic changes during the same period. Residents aged 0-14, 15-29, and over 65 all experienced an upward trend from 1951 to 2011. For example, children under 14 accounted for about 15% of the population in 1951, and by 2011 this had risen to just over 20%. A similar increase was observed among those aged 15-29. The rise was most dramatic among people aged over 65, whose share grew from 10% to roughly 25%.
By contrast, the proportions of people aged 30-39 and 40-64 declined significantly. In 1951 and 1971, those aged 30-39 made up about 20% of the population, but this figure dropped to slightly above 10% in 2011. An even steeper fall was seen in the 40-64 age group, which accounted for nearly 45% in 1951 but fell drastically to around 21% by 2011.