Bulgaria ranked 86th among 183 countries in the 2011 Corruption Perceptions Index, published by Transparency International on Thuesday.
Bulgaria's corruption index stood at 3.3 on a scale where 0 is highly corrupted and 10 is very clean. This score positioned Bulgaria at the bottom among EU members.
Greece occupied the 80th place, scoring 3.4. With a score of 6.3, Cyprus was 30th.
The Corruption Perceptions Index ranks countries and territories, based on how corrupt their public sector is perceived to be, and indicates its position relative to the other countries and territories included in the index.
"This year we have seen corruption on protestors' banners be they rich or poor. Whether in a Europe hit by debt crisis or an Arab world starting a new political era, leaders must heed the demands for better government," the chairman of Transparency International, Huguette Labelleq said.
According to the survey, two thirds of the world countries scored less than 5. New Zealand topped the list, followed by Finland and Denmark, while Somalia and North Korea scored only 1 and shared the last place.