Berlin-based watchdog Transparency International published its Corruption Perceptions Index for

2014 on Wednesday.

The index is based on expert opinions of public sector corruption and ranks countries on a scale from 0 (perceived to be highly corrupt) to 100 (perceived to be very clean).

The following table lists the ten most corrupt countries in the world, according to the anti-graft group.

Country                2014   2013    Change

Somalia                 8           8          0

North Korea         8           8          0

Sudan                   11         11         0

Afghanistan         12         8         +4

South Sudan       15        14        +1

Iraq                       16        16          0

Turkmenistan     17        17          0

Uzbekistan          18        17        +1

Libya                    18         15       +3

Eritrea                 18         20        -2

The following table lists the ten least corrupt countries in the world, according to the index.    

Country                 2014   2013    Change

Denmark                    92     91       +1

New Zealand             91     91        0

Finland                       89     89        0

Sweden                      87     89       -2

Norway                      86     86        0

Switzerland               86     85       +1

Singapore                  84     86       -2

Netherlands              83     83        0

Luxembourg             82     80       +2

Canada                      81     81         0