Percentage of populations within 1, 5 and 10 km zones in PICTS, sub-regions and region.

Estimates are derived from census, GPWv4 and Landscan. Where estimates differed by less than 5% only the census estimate is provided, otherwise the census estimate is bracketed as ‘census (GPWv4, Landscan)’. A complete listing of estimates is provided in S1 Table.–indicates that all of the land area is within the boundary of the next smaller zone. * Population as per most recent census (see Table 1).