Welcome to European Tribune. It's gone a bit quiet around here these days, but it's still going.
The US is unique AFAIK, possibly globally (even Apartheid South Africa had "coloureds"), in that it only recognizes black and white as binary choices. This derives directly from slavery and segregation and the racial worldviews which are adopted legally from them (although slaeholder logistics could become more detailed).

But, per your link, it's changing.

One-drop rule - Wikipedia

The fraction of mixed children census-labeled as solely black dropped from 62% in 1990 to 31% in 2000 (when respondents were allowed to select multiple races), suggesting that the one-drop theory and denying one's European ancestry are no longer accepted the way they used to be.

*Lunatic*, n.
One whose delusions are out of fashion.
by DoDo on Sun Nov 9th, 2008 at 04:31:34 AM EST
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