Transparency International

Transparency International (TI), the global civil society organisation leading the fight against corruption, brings people together in a powerful worldwide coalition to end the devastating impact of corruption on men, women and children around the world. TI’s mission is to create change towards a world free of corruption.
TI publishes the Corruption Perceptions Index (CPI) annually ranking countries “by their perceived levels of corruption, as determined by expert assessments and opinion surveys.” The CPI generally defines corruption as “the misuse of public power for private benefit.” As of 2010, the CPI ranks 178 countries “on a scale from 10 (very clean) to 0 (highly corrupt).”