The 15 most populous nations
Data taken from Wikipedia, October 2008
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Country		Population (millions)  Percentage (of world)
China		1,321		       19.84%
India		1,132		       16.96%
United States	304		       4.56%
Indonesia	232		       3.47%
Brazil		187		       2.80%
Pakistan	163		       2.44%
Bangladesh	159		       2.38%
Nigeria		148		       2.22%
Russia		142		       2.13%
Japan		128		       1.92%
Mexico		107		       1.60%
Philippines	89		       1.33%
Vietnam		84		       1.31%
Germany		82		       1.23%
Egypt		81		       1.13%
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Total		4,356		       65.32%