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This image has three pie charts. On the vertical axis is the number of the world's population in billions of people from zero through 2.5 billion, 5 billion, 7 billion and up to 10 billion. On the horizontal axis are labelled three years, 1950, 2000 and 2050. The first pie chart (smallest) is centred on 1950, the second (medium-sized) on 2000, and the third (largest) on 2050. In 1950 the total population is indicated as 2.5 billion; in 2000 the total population is indicated as 6 billion; in 2050 the total population is indicated as 9 billion. These populations are divided for each year among 3 age ranges; 0-19, 20-64 and 65+. In 1950, the 0-19 age range was 44%, the 20-64 age range was 51% and the 65+ age range was 5%. In 2000, the 0-19 age range was 39%, the 20-64 age range was 54% and the 65+ age range was 7%. In 2050, it is predicted that the 0-19 age range will be 27%, the 20-64 age range will be 57% and the 65+ age range will be 16%.