- Freedom of the press: Compares countries by freedom of the press. The lower the score, the more free the press of that country is. The scores are taken from the Freedom of the Press Index, elaborated by Freedom House, self-defined as "an independent watchdog organization dedicated to the expansion of freedom around the world". The data used in the index come from an annual survey of media independence in 197 countries and territories, assessing the degree of print, broadcast, and internet freedom in each of them.
- Press freedom index: Compares countries by their degree of government censorship, according to the Press freedom index. This index, created by the non-governmental organization Reporters without borders (RWS), is ellaborated using data from an extensive annual survey sent to professional reporters throughout the world. The survey contains questions about the type and ownership of media present in the country, freedom of speech, violence exerted against reporters, election campaigns, access of political parties to the media, etc.
- Year women first voted at national level: Year women first voted at national level.