In order to carry out this calculation, the indigence line is multiplied by a factor that varies between urban and rural areas. For poverty estimates for up to 2006, a factor of 2 was used for urban areas and a factor of 1.75 for rural areas.3 The factors applied since 2007 vary depending on the difference between price trends for foodstuffs and for other goods and services. For estimates calculated up to December 2006, the same rate of variation was applied to both lines. Since 2007, the indigence line has been adjusted to reflect changes in CPI for foodstuffs, while the part of the poverty line corresponding to expenditure on non-food goods has been adjusted to reflect changes in the non-food CPI.