According to UIS data for reference year 2013, there are 757 million adults who have difficulty in reading and writing -- two-thirds of whom  are women.
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Adult literacy rates were below 50% in the following 14 countries: Afghanistan, Benin, Burkina Faso, Central African Republic, Chad, Côte d'Ivoire, Ethiopia, Guinea, Haiti, Liberia, Mali, Mauritania, Niger, Senegal, Sierra Leone and South Sudan.