For over 20 years now, the Transparency International Corruption Perception Index (CPI) has exposed how corruption was viewed by experts in societies of each country. This index ranks countries on a scale from 0 to 100 – most to least corrupt, or least to most effective and active in their fight against it. It has often been used to call out countries on suspicious-looking public sector related affairs, and has been effective at raising awareness on certain countries’ level of corruption.