Transparency International: Corruption Perceptions Index
Provided by Transparency International, the annual Corruption Perceptions Index (CPI) focuses on corruption related to tackling climate change, documenting in detail risks for businesses, ranging from small entrepreneurs in Sub-Saharan Africa to multinationals from Europe and North America. The CPI ranks countries by their perceived levels of corruption, as determined by expert assessments and opinion surveys. Rankings dating from 1995 to present are available. Annually updated, reports can be purchased in print form or can be downloaded (free) in PDF format.