The Corruption Perceptions Index aggregates data from a number of different sources that provide perceptions of business people and country experts of the level of corruption in the public sector. The indicator ranges from 0 (Very high level of percieved corruption) to 10 (very low level of perceived corruption. For the period 1995-2011 the indicator was calculated according to a methodology that has been revised starting from the 2012 round onwards (See: http://files.transparency.org/content/download/2055/13232/file/CPI_2016_...). For this reason the CPI scores for the period 1995-2011 have been separated from the CPI scores from 2012 onwards. For additional information, please visit: http://www.transparency.org/news/feature/corruption_perceptions_index_2016
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