The provided line graphs illustrate the town population and age group distrubition according to years from 1951 to 2011.
Overall, first graph display upward till 1991, after this year the modest decrease showed. Second graph demonstrated population change according to age groups. 0-14 and 15 -29 years group approximately have same percantage and nothing change by years. 30-39 years group shows a little upward between 1951-1971 but then it decrease in trajactory. 40-64 years group marginally decrease according to years despite 65+ group has upward. In 1952, 40-64 years group emerge as a leading percentage of the population and save the position till 2011. 40-64 years group experienced a decline to approximately of the population which equals to 30000 people.
Despite begining with 100,000 population, it displays fluctations, peaking at around 200000 in 1991. Although it experienced slightly decrease in 2011 , it ultimatly achieve higher population rate than the beginning. Notably, despite the differentiation of the population, 40-64 years group maintained it dominant position throughout the timeframe examined