Like Wikipedia says: <citation needed>

I’m sure studies haven been done, and I’d love to see them.

Where, though, what demographics? What types of people, men, women, rich, poor, what language, what culture, what ethnicity? All of those matter.

I can tell you right now that Muslims would probably cheat less, mostly because of less opportunities and the extreme punishments involved. Mexicans, on the other hand, different story. Having lived there for two decades in different cities over the country, having had friends in different layers, rich, poor, brown, white… I can tell you from personal anecdotal experience there that 80+% cheats or has cheated. You can meet a new guy and presume he has cheated or will cheat. Some guys cheat weekly, some women cheat weekly. There are fuck hotels within a 500 meter radius in whatever city you are. Cheating is also seen differently than in Muslim countries.

Yeah, loads of people cheat and if you really believe it’s only 10% then I got a bridge to sell you.