Transparency International has published its 2013 Corruption Perceptions Index (CPI), which ranks countries and territories based on how corrupt their administrative and political institutions are perceived to be on a scale from 0 (highly corrupt) and a 100 (very clean).

Compiled from a combination of surveys and assessments of "the abuse of entrusted power for private gain," the CPI is the most widely used indicator of corruption worldwide.

Syria, in the midst of a brutal civil war, dropped eight points in the last year as government officials profit from the food crisis.

Libya, in the midst of post-revolutionary turmoil, dropped six points to surpass Iraq in official corruption.

Here's the top 18:



Denmark, New Zealand, Finland, and Sweden are list as the four least corrupt countries while the U.S. came in 19th.

And here's an interactive version of the map: