The bar chart shows the percentage of the total world population in four countries in 1950 and 2002, and projections for 2050.

the bar chart depicts the proportion of the whole citizens in

India

,

China

, the

USA

and

Japan

over the 52-year timescale spanning from 1950 to 2002.

Overall

, the proportion of total people in

India

exhibits an upward trend,

while

that of

China

, the

USA

, and

Japan

experiences consistently opposite patterns.

Additionally

,

India

will be expected to become the most popular nation in its population throughout the surveyed period. From the outset of 1950, the percentage of total citizens in

China

was

highest

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, accounting for 23 %, which was 8% higher than that of

India

. 102 years later, it is expected that the figure for the total population in

China

will drop quickly to 15%,

while

the figure for

India

is predicted to increase sharply to 19% by the end of the surveyed period.

On the other hand

, a negligible 3% of people came from

Japan

, hitting the lowest point in 1950, compared to 7% of the

USA

. After which, the data of

Japan

is estimated to fall slowly about 2% by 2050,

while

there was a slight decrease to 5% in the level of the

USA

in 2002

,

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before being anticipated to be unchanged by the end of the period.