Although the urban–non-urban variable was always used in the sampling procedure, it was not reported by Statistics South Africa between 2004 and 2010, due to controversy around the definition of area types. The area type variable is part of the stratified sample design, and the weights that are applied effectively impose on the data the urban–rural split that is estimated by a demographic model. Therefore the distribution of urban and rural households reflects the estimated size of urban and rural populations, and is not a statistical finding of the survey itself.
The distinction between urban and rural is described by Statistics South Africa as “rather fluid”, and some areas have been reclassified in the past few years. This is mostly because the ‘semi-urban’ category was dispensed with in the 2001 Census, resulting in a slightly more inclusive ‘urban’ classification which, for example, now includes informal settlements on the urban periphery.
Statistics South Africa only reported area type for the years 2002-2004 and 2010. For 2008 we use data from the National Income Dynamics Study.