Every year, Transparency International makes public its Corruption Perceptions Index, a measure of how corrupt different countries

Question:

Every year, Transparency International makes public its “Corruption Perceptions Index,” a measure of how corrupt different countries are in relation to each other. Go to www.transparency.org/policy_research/surveys_indices/cpi/2009 and learn about the index.
1. Which are some of the most corrupt countries?
2. Which are some of the least corrupt countries?
3. Do you notice anything in common between the countries in the less corrupt group?
4. How about the more corrupt group?