The graph shows the proportion of the population aged 65 and over between 1940 and 2040 in three different countries. Summarise the information by selecting and reporting the main features and make comparisons where relevant.

The line graph demonstrates the percentage of people who were 65 years old and above in the three different nations over a period of 100 years between 1940 and 2040. Overall, what stands out from the graph is that, although the proportion of the population aged 5 and above was the highest in the USA and lowest in Japan, this finished the other way round where the UK constituted of lesser than Japan at the finish. For Sweden on the other hand, this proportion increased, however, it is touted to remain second in 2040. Focusing on the USA and Japan, in 1940, while the proportion of the elderly comprised 10% in the former, this was half for the latter with 5%. In contrast, despite the start above, the population of old people in forecasted to attain a little over four times in Japan, this is projected to be 22. 5% for the USA, 2. 5% lower than Japan. As for Sweden, the proportion of 65-year-olds and above was close to 6% in 1940 before falling to 3% in 1980. In the future, this figure is expected to fluctuate followed by reaching one-fourth of the total people studied which is 25%.