The bar graph demonstrates how the entire world population percentage changed in India, China, the USA, and Japan, over a 50-year period, starting in 1950, and also indicates the projection till 2050.
Overall, it can be seen that the percentage of population in India increased, whereas the population percentage dipped in other three countries. Further, China stood at the highest value in 1950, compare to other three countries.
Looking at the data sets of India, it can be seen that the population percentage in India was 15% in 1950. By 2000, it had peaked at 19% and in further expected to grow and reach around 21%, which would be the highest population in 2050 among the given countries.
Turning to the data sets of China, it is evident that China illustrated an opposing tend to India. The population percentage stood at around 26% in 1950. Although it declined to 24%, it was still the highest value in 2000, compare to India, the USA, and Japan. Moreover, it is estimated that the population percentage of China will continue to drop and would reach approximately 19% by 2050.
Finally, the rest of the data sets in more details, it is apparent that the percentage of population decreased to about 10% and 5% to 8% and 4% in the USA and Japan from 1950 to 2000 respectively. In addition, it is predicted that the population percentage will remain the same in the USA, whereas it would likely to keep falling to around 3% till 2050 in Japan, which would be the lowest value in the chart.