The line graph compares three countries (Japan, Sweden, and USA) in terms of proportion of the elderly population aged 65 and over, from 1940 to 2040.
Overall, despite some fluctuations, proportions for all three countries present a constant and steady growth over the period.
In 1940, the USA had the highest proportion of elderly people, at just under 10%, and was the leading country at the beginning. Sweden followed with 6% of its population aged 65 and over. The figures for USA and Sweden gradually converge, at approximately 15% by 1980. After this point, Sweden continued to grow and reached about 20% by 2020, while USA remained relatively stable over the next two decades. By 2040, the proportion of people aged 65 and over in the USA expected to grow to around 24%.
Meanwhile, Japan which had the lowest proportion at 5% in 1940, experienced a gradual decline to about 3% by 1990. However, after this point, the figure began to increase steadily, reaching round 10% by 2030, and then rising sharply to 23% in 2040, becoming the leader among the two countries.
