They had 11 years of compulsory schooling and yet more than 3,000 people aged between 10 and 39 cannot read and write a simple sentence.
Considered illiterate, this group made up almost two per cent of the population born between 1972 and 2001, according to the 2011 census.
The final report of the census was published this week by the National Statistics Office, giving a snapshot of the population, including the level of education.
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