How many people who were NOT superheroes/supervillains (e.g. excluding assorted Robins/batgirls etc..., or the likes of Al G'uls/Catwoman/Joker) were explicitly told by Batman (or Bruce Wayne) that the two are the same person?
The answer can be either from comics only, OR from comics and other adaptations - I expect the number to be pretty small either way when you exclude superheroes/supervillains.
The only example I can think of would be Gordon from Nolan's Batman movies, and possibly Rachel from the same.
Please note the question is restricted to people explicitly told by Batman/Bruce when they did not know or even suspect the truth; no those told by someone else or who somehow logically figured out/guessed the identity on their own first.