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.