 There is also a high prevalence of infibulation among girls in Niger and Senegal, and in 2013 it was estimated that in Nigeria three percent of the 0–14 age group had been infibulated.The type of procedure is often linked to ethnicity.In Eritrea, for example, a survey in 2002 found that all Hedareb girls had been infibulated, compared with two percent of the Tigrinya, most of whom fell into the "cut, no flesh removed" category.