This section records the relation to productive activity of the population resident in family households as well as the changes produced in their work situation, attending to the Survey on the Population in Relation to Activity (PRA), quarterly released. The annual Labour Market Census operation (CMT) - Supply - sets out to collect information made up of the population aged over 16 to obtain an approximation to the existing sectorial and socio-professional structure. The main information about the activity of the whole population is provided by the Population and Housing Census (CPV) carried out every ten years, and assisted by the Population and Housing Statistics (EPV) every five years.