The annual Corruption Perceptions Index (CPI), first released in 1995, is the best known of TI’s tools. It has been widely credited with putting TI and the issue of corruption on the international policy agenda. The CPI ranks 180 countries by their perceived levels of corruption, as determined by expert assessments and opinion surveys.

For additional information please visit: http://www.transparency.org/policy_research/surveys_indices/cpi/2008