The Democracy Index is using the data from the Economist Inteligence Unit to express the quality of democracies as a number between 0 and 100. It's based on 60 different aspects of societies that are relevant to democracy: universal suffrage for all adults, voter participation, perception of human rights protection and freedom to form organizations and parties.
The democracy index consists of: Electoral pluralism index, Government index, Political participation index, Political culture index, Civil liberty index.
The sub-indexes are based on the sum of scores on roughly 12 indicators per sub-index, converted into a score between 0 and 100.
*The Economist publishes the index with a scale from 0 to 10, but we are presenting it in a scale from 0 to 100 to make it easier to communicate as a percentage.