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This shows the population of Botswana in millions (second column) from 1975 to 1990 (first column, where 0 is 1975). Data from "World Population Growth and Aging" by N. Keyfitz, University of Chicago Press, 1990, page 118.

1st col	2nd col
0	0.755
5	0.901
10	1.078
15	1.285