The bar chart illustrates the proportion of the total world population in four countries—India, China, the United States, and Japan—in 1950 and 2003, along with predictions for 2050.
Overall, the percentage of the total world population in China, the USA, and Japan showed downward trends throughout the given and projected periods, except for India. Notably, China was dominant in terms of the proportion of the total world population, whereas Japan exhibited relatively lower figures.
In 1950, the percentage of the total world population in India accounted for 15%; this was followed by a slight increase in 2002, reaching 17%. In predictions, in 2050, the total population rate in India will increase further to 19%, making it the highest share of the total world population for the better part of the period.
In contrast, the proportion of the global population in China made up a staggering 23%; however, in 2002, this figure gradually declined to 20%. In 2050, the total population rate in China is expected to decrease further, dipping to 15%. Similarly, starting at approximately 7% and 4% in 1950, the percentage of the global population in the United States and Japan saw minimal decreases in 2002, with 5% and 3%, respectively. However, projections indicated that in 2050, while the total population rate of the former country will remain stable, the latter one will decrease significantly to 1%.