I'm half-asian half-caucasian and i noticed that about 30.2% of my hair strands are dark, thick ones, and the rest medium-thickness lighter strands. Another half-asian half-caucasian friend of mine had the same thing going on for her hair (until she dyed it blue!)
I've yet to creepily examine other people's heads.
So in the meantime, if you would like, please state your ethnicity and hair strand composition in percentage with 3 significant figures![]()