The total adult literacy rate in 2008 was 78% and this rate goes up to 97.3% when considering only people from 15 to 24 years old. Education is given a high priority and accounts for 6% of GNP. A basic education for children between the ages of 6 and 16 has been compulsory since 1991. Tunisia ranked 17th in the category of "quality of the higher educational system" and 21st in the category of "quality of primary education" in The Global Competitiveness Report 2008–9, released by The World Economic Forum.