This means that one in six children is extremely poor and the scourge of poverty affects more than 28.3 million children and adolescents (see figure 11.1 and table II.2). These children experience one or more severe deprivations in terms of dwellings with unsafe construction materials and overcrowding, lack of access to drinking water or sanitation facilities in the home, general and/or chronic undernutrition, lack of access to the education system (children who have never attended school) or lack of access to communication and information systems (including lack of electricity in the home). An average 72% of children in countries with the highest total child poverty levels (El Salvador, Guatemala, Honduras, Nicaragua, Peru and the Plurinational State of Bolivia) were extremely poor (20.2 million in these six countries). Among the countries with the lowest total child poverty levels (Argentina, Chile, Costa Rica, Ecuador and Uruguay), a simple average of 19.5% of children were extremely poor (2.8 million).