The given line chart illustrates the percentage of residents in a particular country by different age groups from 1960 to the present and a prediction to 2040.
Overall, it is evident that there were decreasing trends in the population of the 0-14 and 15-64 groups, while the oldest age group witnessed an increasing trend over the period shown. In addition, the 15-64 age group consistently accounted for the largest proportion throughout the period.
In terms of the percentage of people in the 0-14 and 15-64 age groups, about 30% of the former was recorded in 1960, significantly lower than around 55% of the latter. Over the following years, 0-14 age bracket dropped significantly to around 12% in 2020, before being anticipated to fall slightly to just over 10% in 2040. In contrast, despite rising moderately to nearly 60% ten years later, a minimal decline to roughly 58% was seen in the 15-64 age cohort by 1980. This figure then plummeted to just under 50% over a forty-year period and is forecast to decrease continuously to around 45% in the final surveyed year.
As for the remaining group, people aged 65 and over started the period at about 16% in the first year, before remaining relatively stable ten years later. After that, a consistent increase to around 35% was witnessed in this group, and it is predicted to rise substantially to nearly the same figure compared to the 15-64 age bracket in 2040.