When will India have more people than China?

The population of China currently exceeds the population of India by approximately 70 million, according to estimates from the United Nations. The UN's World Population Prospects report puts the population of China at 1.38 billion, compared to 1.31 billion for India. Other sources' estimates of current population range from 1.37 to 1.40 billion for China and from 1.28 to 1.31 billion for India. Just as current population estimates differ, so do forecasts as to when the difference in the...