A World Economic Forum meeting in Davos, Switzerland. Wikimedia Commons The World Economic Forum has released its annual corruption index as part of its Global Competitiveness Report.

The findings are based on a WEF survey that interviewed nearly 15,000 business leaders from 141 economies from February to June.

Countries in the corruption index are ranked according survey responses to the following three questions:

1. In your country, how common is illegal diversion of public funds to companies, individuals, or groups?

2. In your country, how do you rate the ethical standards of politicians?

3. In your country, how common is it for firms to make undocumented extra payments or bribes?

Numerical answers ranging from one to seven are given, with one indicating the most corruption and seven indicating the least.

Business Insider looked at the wealthy countries in which corruption was most endemic.

We focused only on members of the Organisation for Economic Cooperation and Development, an intergovernmental group of advanced economies, and ranked them according to their position on the corruption index.

Here is the list.