When I lived in Egypt it was still common for 2nd and 3rd cousins to marry....but I don’t know how to quantify that (I’ve never studied the sociology behind it). 1st cousin marriages were not as common.....but it still happened nonetheless.
I left in 1989.
It has been pointed out that this was common amongst British only a generation ago. If not an immediate cousin, they married “the boy next-door,” which had the same effects because of the many intertwined links.