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The chart shows how the demographical trend changed inChina, India, U.S., and Japan between 1950 and 2002, as well as a furtherprojection until 2050.
It is noticeable that the Chinese accounted for the vast majority of world population in the past, showing, however, a siginificant decline.This trend was the same on the figure for the U.S. and Japan. By contrast, the demographical trend in India on the world scale was on the rise. The projection indicates that, except for the U.S., the proportion ofChinese and Japanese will keep going downward, while that for India will maintain rising, which will eventually take the place of China.

In 1950, the Chinese accounted for 25 percent of the world population. It dropped to about 23 percent in 2002, followed by the prediction of a more significant decline by 2050 to less than 20 percent. China’s neighboring country, India, however, witnessed an increase from 15 percent in 1950 to nearly 20 percent by 2002. The projection shows it will surpass thefigure for China by 2050 when there will be approximately 22 percent of Indians in the world.
In contrast, only moderate changetake place in terms of the proportion ofpeople from the U.S. and Japan. Americans accounted for 10 percent in 1950, which was as twice larger than that in Japan. The proportion of both places decreased from 1950, reaching 8 percent and 3 percent by 2002 respectively. The prediction suggests that the proportion of Americans will maintain unchanged at 8 percent while that for will be experiencing a future decrease to 2 percent by the year 2050.