Despite the reductions recorded over the decade, levels of severe deprivation in access to drinking water are still high in a number of countries, especially in the Andean region: in the Plurinational State of Bolivia, 31.4% of children were severely deprived of access to drinking water in 2009 and, in Peru, 18.6% of children were severely deprived in 2011. Those who were not attending school at the time of measurement and had not completed secondary education but had attended school at some time are considered to be moderately deprived. Education is one of the child poverty dimensions with the lowest percentage of moderately or severely deprived children and adolescents.12 In 2011, 5.2% of the region's under-18-year-olds suffered moderate or severe deprivation of their right to education (they had never attended school or had dropped out), although only 0.8% suffered severe deprivation. From this it may be surmised that virtually all children have access to formal basic education (see table 11.6). Only two countries (Nicaragua and Guatemala) recorded levels of severe deprivation at or above 4% when last measured (see figure II.3).