There are 17 indigenous tribes in Paraguay with the majority having their territories in the Chaco region. Tribes in this region include the Guaraní, Ayoreo, Toba-Maskoy, Aché and Sanapan which according to the census from 2002 number an estimated 86,000 or roughly around 2 per cent of the total population. These peoples have faced persecution particularly under the dictator Alfredo Strossner that some observers called a genocide.