The Transperency International released its Corruption Percentage Index annually, and this year's installation revealed a three-way tie between the most corrupt nation in the world: Good job, Somalia, North Korea and Afghanistan.

The index gauges corruption in accordance to its perception in a country's public sector. This is ranked from most to least corrupt on a scale of 0 to 100; of the 177 countries, two-thirds scored below a 50. Fortunately, the U.S. was among the least corrupt, earning a 73.

The country that improved the most in terms of corruption was Myanmar:

The Southeast Asian country emerged from nearly five decades of military rule in 2011. It gained six points, climbing to 157th position. It was 172nd last year.

Syria, Lybia, Spain, Iceland and Australia were among the countries that got worse. Check out the index for detailed readings and breakdowns.

[via NPR]