 The city has a higher proportion of 14–35 year olds than the Rwanda average, with 50.3 per cent versus 39.6 per cent nationwide.Children between birth and 17 years of age have a below-average share of the total, with 39.6 per cent against 47.7 per cent nationally.These differences are attributed by the National Institute of Statistics of Rwanda (NISR) to the migration of working-age Rwandans from rural to urban areas.