Transparency International released findings Thursday about bribery in public and private institutions.
Rwanda was found to be the least corrupt among the five countries in the region. Kenya was the most corrupt country in last year's survey, but that survey did not include Burundi and Rwanda.
The group interviewed almost 10,500 people across Rwanda, Burundi, Kenya, Tanzania and Uganda between January and March. Those interviewed were asked whether they had encountered institutions where bribes were demanded for services, if they paid and whether they received the services sought after payment.