Top Ten Least Corrupt Nations: CPI Index Rankings
The above information is based on the Corruption Perceptions Index (CPI). The scores indicate the perceived level of corruption in the public sector for each country. The CPI had 13 surveys, but not all of the surveys were used in each country. The confidence range shows the margin of error in these surveys.
Here is a Forbes article about the most corrupt : http://www.forbes.com/2007/04/03/corruption-countries-nations-biz-07caphosp-cx_da_0403corrupt.html
What jumps out at you here?