This line chart shows the changes in the proportion of the elderly people in three countries from 1940 till today. Moreover, it offers predictions for a period to 2040.
During the three score years, the USA generally outweighed Sweden in terms of the proportion of those aged 65 and over. But the gaps between have never been remarkable. In stark contrast, Sweden strikingly eclipsed Japan in this aspect evidenced by the fact that in 1940 the proportion for the USA was about 9%, clearly higher than 5% for Japan.
Whereas Japan experienced declines from 5% to 3% , both Sweden and the USA climbed. Put it in detail, by the year 1983, the figures have peaked at 15% and 13% in the USA and Sweden respectively. Noticeably, in 1997 the proportion in the USA was equal to that in Sweden.
According to the forecast, from now on, all of the three countries will skyrocket although exceptions might happen. However, by 2040 the proportion will have peaked at 27%, 25%, and 23% in Japan, Sweden, and the USA respectively.
In sum, the three countries are different in the field under study.
