Good do we know how many of these people are self-made? I know the IT related guys (Gates, Zuck, Balmer, etc) but they are a fraction of the list. I'm sure ther

Good do we know how many of these people are self-made? I know the IT related guys (Gates, Zuck, Balmer, etc) but they are a fraction of the list. I'm sure there are others but what is their real % is still not known.