How many people per year would be born on their first life. Having no past lives before?

I have no inner monolgue. And my birthdate calculates out that i am in my first life. Could these two things be related.

I wont stop until i understand why i do not have an inner monologue.

Ive tried giving myself one, but found that to just be an effort to try and remember to do.

Someone talk to me!