The diagram illustrates the percentage of the total world population in 4 nations: India, China, the USA, and Japan in 1950, 2002, and 2050.
Overall, it is clear that there will be a significant changed in countries, especially China and India. I contrast, in the United States and Japan will be the lowest figures.
Looking at the chart in more detail, we can see that in 1950, China had the highest percentage of population compared to the others, while the lowest nation was Japan. Also, the India accounted for 15% percentage of population, and the United States accounted for approximately 7%.
On the other hand, in 2002, also the lowest country was Japan, accounting for around 3%, and the second nation was the USA accounted for 5%. By contrast, China was the highest percentage of population, accounting for 20%, and India accounted for around 17%. In the future, especially in India, population might be increased, while China might be dropped to 15%. In the USA, population might be stayed at the same percentage at 5%, while Japan might be the lowest percentage.
