I'm surprised it's 14%. Of that 14%, I'll bet that somewhere along the line, almost everyone in that group (my guess is 80-90% of them) had someone who personally took that person in hand (a teacher, another relative, whoever) and guided her/him along during the critical early/adolescent/young adult years.

Expectations, networks of support, exposure, and guidance are all vital parts of later success.

"It Can't Be Just About Us"
--Frank Schnittger, ETian Extraordinaire