I remember reading about a country doing DNA collection of every single person born, since the 80s or something like that, leading to that country now sitting on the most extensive DNA database of its kind. I can't remember which country it was though. Searching for "most extensive DNA database" and similar just leads me to various voluntary databases from the US, but I think this database I'm thinking about was involuntary, and every single person in the country is basically registered in it.