The Guardian published an article about the corruption report 2011. On their website this map is interactive: you can look for your country, click on it and find out how it ranks.
Don’t be misled by the green colour: Canada and Greenland show very big on the map. Depressingly, however, are the many countries coloured light and dark blue and — worst of all — purple.
You can find all the details on the Transparency International website. They define corruption as:
Corruption is the abuse of entrusted power for private gain. This is the working definition used by Transparency International (TI), applying to both the public and private sectors. The CPI [Corruption Perceptions Index] focuses on corruption in the public sector, or corruption which involves public officials, civil servants or politicians. The data sources used to compile the index include questions relating to the abuse of public power and focus on: bribery of public officials, kickbacks in public procurement, embezzlement of public funds, and on questions that probe the strength and effectiveness of anti-corruption efforts in the public sector. As such, it covers both the administrative and political aspects of corruption. In producing the index, the scores of countries/territories for the specific corruption-related questions in the data sources are combined to calculate a single score for each country.
This makes one wonder. How on earth are international agreements ever possible? What are all these countries trying — or not trying — to achieve for instance in Durban (situated in a dark blue country)? And will the majority of these countries live up to any international agreement?