I have seen this claim many times, but I have never seen anyone produce evidence to back it up.
Why do you believe that what you wrote is true?
Why do you believe that what you wrote is true?
Because I've seen this claim many times over more than a decade, and have seen evidence multiple times. I've also been able to search for it when I was curious and find it without issue.
Here's the first search result, a Vice article from 2018: https://www.vice.com/en/article/evkmz7/study-again-shows-pir...