Percentage of men under 30 suffering from male pattern baldness?

[genki21]

Does anyone have a figure for the percentage of men suffering from male pattern baldness under 30 or around 30...basically premature hairloss?

Before I get flamed on how useless this is, I know, I know...it's useless. I'm just curious that's all =)

 

[asolof]

I found this but I don't know how accurate it is:

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In some men, initial male-pattern hair loss may be delayed until the late third to fourth decade. It is generally recognized that men in their 20’s have a 20 percent incidence of male pattern baldness, in their 30’s a 30 percent incidence of male pattern baldness, in their 40’s a 40 percent incidence of male pattern baldness, etc. Using these numbers one can see that a male in his 90’s has a 90 percent chance of having some degree of male pattern baldness.
>>

From: http://www.ishrs.org/hair-loss/hair-loss-male.htm

From The International Society of Hair Restoration Surgery (ISHRS)