I am sure I remember reading that non-human races in the Forgotten Realms were less common than humans in one of the rule books. Is there an official percentage value for the populations of non-humans anywhere?

Specifically I'm looking at Sword Coast, Forgotten Realms in D&D 5e.

If it doesn't exist in FR for 5e, I'd also be interested in whether these numbers existed in any other previous edition (Sword Coast, Forgotten Realms) so I could convert them to 5e