In most cases, data on the structure of household consumption patterns for both foodstuffs and other goods and services are derived from national household budget surveys carried out in the 1980s. In order to carry out this calculation, the indigence line is multiplied by one factor for urban areas and another for rural zones. For the 2006 poverty estimates, a factor of 2 was used for urban zones and a factor of 1.75 was used for rural areas.8 The factors applied since 2007 vary depending on the differentials between trends in the prices for foodstuffe and for other goods and services.