The first bar chart compares the changes in total population in the particular town in the UK from 1951 to 2011, while the second bar chart shows the proportion of the five age groups.
Overall, the figures for total population went up, with the percentage of 0-14 age group, 15-29 age group, and 65+ age group also increasing, while the share of people aged 30-39 and 40-64 declined.
Regarding the total population, the figure witnessed a dramatic twofold growth from 100,000 in 1951 to 200,000 in 1991, showing the highest result throughout the period; however, the figure experienced a drop in 2011, standing approximately at 175,000.
As for the age group distribution, the share of people aged 0-14 witnessed a growth from about 16% in 1951 to just above 20% in 2011. Having almost the same pattern, the percentage of the 15-29 age group increased from approximately 15% in 1951 to 20% in 2011. In contrast, the proportion of people in their 30-39 saw a drastic twofold drop from just below 20% in 1951 to 10% in 1991. However, it experienced a slight increase to about 11% in 2011. Also