The bar chart illustrates information about the proportion of total world population contributed by four countries including, India, China, USA, and Japan from 1950 to 2050.
Overall, China had the largest share of the world population in 1950 and 2002, but it is expected to decline significantly by 2050, when India will become the most populous among the four. In contrast, India shows a steady increase, while the USA and Japan both experience gradual decreases.
In 1950, China accounted for the highest proportion of the global population at just over 20%, compared with about 15% for India. By 2002, China still led with around 20%, although its share had fallen slightly, whereas India’s figure rose to approximately 17%. Looking to the expectation for 2050, India is projected to continue increasing to around 18-19%, overtaking China, which is expected to drop sharply to about 15%.
The USA shows a modest decline over the period, starting at roughly 7% in 1950 and falling to around 5% in 2002, with a similar level for 2050. Japan, meanwhile, has the smallest proportions throughout, decreasing steadily from about 4% in 1950 to around 3% in 2002, and finally to just over 1% by 2050.