The US usually ranks 25-50 on world corruption indices. Third world countries rank 100-200.
That would mean that the US is more corrupt. I’m pretty sure that’s not what you meant, so I’m just adding this to help.
I don’t know if it’s a language thing or a regional thing (or just a regular mistake), but “rank” usually means that 1 is the most, 2 is the second most, and 100th would be less corrupt than 1, 2, etc.