How do you measure corruption, which includes behind-the-scenes deals, nepotism, corrupt prosecution, and bribery?
Over the last few decades, the CPI has found success doing so indirectly through perceptions.
By aggregating multiple analyses from country and business experts, the index assigns each country a score on a scale of 0 to 100, where 0 is highly corrupt and 100 is very clean.
Here are the results of the 2021 CPI, with the least corrupt countries at the top:
Ranking at the top of the index with scores of 88 are Nordic countries Denmark and Finland, as well as New Zealand.
They’ve consistently topped the CPI over the last decade, and Europe in general had 14 of the top 20 least corrupt countries. Asia also had many notable entrants, including Singapore (tied for #4), Hong Kong (#12), and Japan (tied for #18).
Comparatively, the Americas only had two countries score in the top 20 least corrupt: Canada (tied for #13) and Uruguay (tied for #18). With a score of 67, the U.S. scored at #28 just behind Bhutan, the UAE, and France.
Scoring towards the bottom of the index were many countries currently and historically going through conflict, primarily located in the Middle East and Africa. They include Afghanistan, Venezuela, Somalia, and South Sudan. The latter country finishes at the very bottom of the list, with a score of just 11.