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Population Growth Rate - Average exponential rate of growth of the population over a given period. It is calculated as ln(Pt/P0)/t where t is the length of the period. It is expressed as a percentage.
Source - http://esa.un.org/unpd/wpp/Excel-Data/population.htm
Suggested citation: United Nations, Department of Economic and Social Affairs, Population Division (2011). World Population Prospects: The 2010 Revision, CD-ROM Edition.