A line chart showing the estimated world population by region every 25 years from 2000 to 2100. The population of Asia is expected to rise from 3.7 billion in 2000 to a peak of 5 billion in 2050 before declining to 4.4 billion. The population of Africa is expected to rise from 6.3 million to 4.3 billion. The population of the Americas, Europe and Oceania are expected to remain steady at current levels.