The bar chart given illustrates the share of the total world population by 4 different countries, namely India, China, the USA, and Japan, from 1950 to 2002, and the predicted amount for 2050.
Overall, the proportion of Indians will have witnessed an upward trend, while the rest will have undergone the reverse. Most strikingly, India and China have a significantly high population growth compared to the others.
A more detailed look at the chart reveals that the rate of India’s population will rise steadily from 15% to almost 20% in 2050, and it will become the most populous country, even overtaking China as expected. Meanwhile, China was in the first place, despite a slight decrease in its figures from approximately 23% to 20% in 1950 and 2002, after which it is forecast that the population of the USA will decline moderately to 15% in 2050.
Additionally, the percentage of inhabitants of the USA is estimated to level off at 5% by the end of the period, after its fell gently by 3% in 1950. As for Japan, its figure shows a remarkable drop of around 6% from nearly 10% to about 5%. Then, it will keep going down, but gradually, to above 2% in 2050.