The Corruption Perceptions Index (CPI) aggregates data from a number of different sources that provide perceptions by business people and country experts of the level of corruption in the public sector.The index ranks countries and territories using a scale of 0 to 100, where 0 is highly corrupt and 100 is very clean. The CPI draws upon the assessment of experts and business executives on a number of corrupt behaviours in the public sector, including: bribery, diversion of public funds, use of public office for private gain, nepotism in the civil service, and state capture. Some of the sources also look at the mechanisms available to prevent corruption in a country, such as: the government’s ability to enforce integrity mechanisms, the effective prosecution of corrupt officials, red tape and excessive bureaucratic burden, the existence of adequate laws on financial disclosure, conflict of interest prevention and access to information, and legal protection for whistleblowers, journalists and investigators. This is a Composite Index (i.e. aggregating multiple sources)