Fraction People

I'm wondering if this is a uniquely North American thing: we seem to define ourselves as fractions. I can say that I'm one eight Swedish or five sevenths Irish or whatever. Most people I know do it. If you ask, they'll be able to give you their fractions. North America seems like a perfect place to be fractional. We're a land of colonists. No one is one hundred percent anything. What I'm wondering, then, is if anyone else does that, or whether it's just us.