Based on the last Transparency International Corruption Perception Index, 6 out of 10 most corrupt countries in the entire world are from Africa. 7 out of the 10 least corrupt countries are in Europe. Zambia is 76th out of 167 countries listed from least corrupt to most corrupt. USA is 16th.

The 10 least corrupt African countries on the list in order are Botswana (28th), Cape Verde (40), Seychelles (40), Rwanda (44), Mauritius (45), Namibia (45), Ghana (56), Lesotho (61), Senegal (61) and South Africa (61).

The 10 least corrupt countries in order of increasing corruptness are Denmark, Finland, Sweden, New Zealand, Norway, Netherlands, Switzerland, Singapore, Canada and UK. The most corrupt nation in the world is North Korea (167) in joint last position with Somalia, followed by Afghanistan.

10. Chad (147)
9. Zimbabwe (150)
8. Burundi (150)
7. Eritrea (154)
6. Guinea-Bissau (158)
5. Libya (161)
4. South Sudan (163)
3. Angola 163)
2. Sudan (165)
1. Somalia (167)

http://www.transparency.org/cpi2015#results-table