The Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11 consists of estimates of human population density (number of persons per square kilometer) based on counts consistent with national censuses and population registers, for the years 2000, 2005, 2010, 2015, and 2020. A proportional allocation gridding algorithm, utilizing approximately 13.5 million national and sub-national administrative units, was used to assign population counts to 30 arc-second grid cells.
1) At administrative level 1 these tables do not refer to the National Capital District or to the Autonomous Region of Bougainville. The National Capital District is combined with the Central Province and Bougainville is combined with the North Solomons province.