Comment by kgwgk

> How many of those were born in CH?

About one third. That would bring the fraction of naturalised foreign-born citizens in line with the US (which is also a kind-of-hard place to get citizenship, that's true).

> CH has mandatory military service which discourages many males from naturalizing

That doesn't make it difficult, it makes it undesirable and suggests that many people could get it but choose not to.