At what percent of the worlds population is left handed?

Question

I just heard this on a TV show and was wondering if anyone else knew the answer

Answer 1

I haven't really thought about it, because i use both hands

Answer 2

I think it runs at about 11%. I always paid attention to this because I'm left-handed myself!

Answer 3

hmmmm im going to say 9 percent

Answer 4

I heard that its somewhere aroun 20%.