The Corruption Perception Index (CPI) is a global ranking that measures the perceived levels of corruption in the public sector of various countries. Developed by Transparency International, the CPI uses surveys and expert assessments to assign scores from 0 to 100, where 0 indicates high corruption and 100 indicates a clean public sector. The index is published annually and aims to raise awareness about corruption and its impact on society. By comparing different countries, the CPI helps identify trends and encourages governments to implement reforms to improve transparency and accountability in their institutions.