The line graph illustrates the rate of people who was 65 years old and over a period of 100 years in Japan, Sweden, and USA.
Overall, the percentage of citizen aged 65 and over of Japan in most years was lower than that of others. Over a period shown, the rate of three nations increased slightly.
In 1940, the proportion of people aged 65 and over in Japan was 5 percent, while the rate in USA and Sweden was 10 percent and approximately 7.5 percent respectively. Japan witnessed a slight fall in rate of population aged 65 and over, which was a lowest point at 2.5 percent by 1980. By contrast, in the same period, the percentage of 65 years old and over people in both USA and Sweden rose similarly to 15 percent and under.
From 1980 to 1990, in USA and Sweden there were a gradual decline in aged rate, which dropped to below 15 percent, before the percentage of citizen aged 65 and over in Sweden overtook the aged rate in USA in 1990s. The following period, the aged rate in Sweden varies significantly more than USA. Between 2030 and 2040, the aged rate of people who was 65 years old and over in Japan emerged sharply to over 25 percent, which became the country having the largest number of old citizen in three different nations.