I suppose there is a bit of a spread of some of the psychosis.. but its very minimal compared to the USa.. In the USA its everyone with maybe 1% as an exception. In the netherlands I could spend a year meeting person and its a bad year if even one of them matches the typical psychosis I find in america.
We arent talking about "There are problems", we are talking about a very specific and toxic kind of psychosis, personality disorders.
I will say this though, while it isnt too common in much of the world it is fairly common (though not as bad as the USA) in english speaking countries, the UK is particularly bad, and a close second after the USA.