The graph below shows the proportion of the population aged 65 and over between 1940 and 2040 in three different countries. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The given line graph illustrates the

percentage

of elderly people in Japan, Sweden, and the

USA

from 1940 to 2020, with projections until 2040.

Overall

, the

proportion

of the three different

countries

has increased since 1940 and is expected to continue rising until 2040.

Moreover

,

while

the

percentage

of the population aged 65 and over in the

USA

was the highest at the start, it is estimated that

this

figure will be overtaken by Japan by the end of the period. In terms of

countries

with a high

proportion

at the start, the

proportion

of the

USA

stood at just below 10% in 1940. The figure

then

rose moderately to precisely 15% in 1980 before remaining relatively steady until 2020.

Thereafter

, it is projected to experience a significant growth of around 8% to finish at 23%.

Likewise

, the

proportion

in Sweden was approximately 7% in 1940. From

this

point onwards, it witnessed a significant climb,

thus

surpassing that of the

USA

at about 18% in 2020. In the following 20 years, it is predicted that it will rise moderately, ending slightly above that of the

USA

at 25% in the final year. Regarding the country with the lowest old-age population at the start, the

percentage

in Japan stood at exactly 5% in 1940.

In contrast

to other

countries

, the

percentage

fell to around 3% in 1960 and remained steady until 1980.

Then

, the figure rose moderately to exactly 10% in 2020 before it is expected to skyrocket and overtake those of the other two

countries

at about 27% in 2040.