The provided line graph gives information on the percentage of people aged 65from 1940 to 2040 in three various nations.

Overall, Japanese people accounted for the maximum proportion of population, while the minimum amount of percentage was also observed in Japan throughout the years given. In detail, proportion of population aged 65 and over in Japan stood at 5% in the beginning of the period, whereas this figure decreased and became 3% in 1960. This indicator maintained the same level for the next year. Japanese population increased and made up 5%. This upward trend will continue and reach its peak of 27% in 2040. Turning to another country, 7% was experienced in the percentage of population in Sweden, while the indicator climbed, amounting for 10% and 15% in 1960 and 1980 respectively, then this ratio rose and represented 20% in 2020. Considerable rising of 25 % will be observed in 2040. This figure for USA people constituted 10% in 1940, whereas the amount of people rose considerably, reaching 15% for the next year. During the next two decades the proportion remained steady. This trend will be 27 % in 2040.