The graph below illustrates the proportion of the population aged 65 and over between 1940 and 2040 in three different countries

The graph below illustrates the proportion of the population aged 65 and over between 1940 and 2040 in three different countries.
The age population is Japan increased significantly where as USA and Sweden increased slightly.
In 1940, Japan started from 5%, in the next 40 years the population started to drop slightly from 5% to 3% but afterwards from the year 2000 to 2040, there was a massive increase in the population whereas in Sweden the percentage started from 6% and all through the years there was a slight increase in the population even though it dropped in some years. In USA, the population started perfectly well than the other countries but along the way it decreased in the year 2000, by 2020 to 2040 there was a reasonable increase in the number.
In 2040, the porportion of community in Japan, America and Sweden will reach about 27%, 25%, and around 23% respectively.