User blog comment:IamJakuhoRaikoben/Chapter 413: The Book of E.N.D, Review./@comment-83.253.84.32-20141222153307/@comment-9595671-20141223145715

And correct me if I'm wrong on this, but we also don't know the population of the Fairy Tail world. The only thing I'm sure of is its not as many as real life which is 7 billion (at 10% that's still a large number)

And with only 3 future characters seen, that 10% doesn't seem like a big number