Dianavan, your "American hybrid" is unacceptable on census forms of the U. S., UK AND Canada.
The UK and Canadian forms go heavily into religion, and race- Muslim, Hindu, Christian, etc. - I just checked, and was surprised. Of course you can fit into the 'other' or 'none' categories. Just don't commit a perjurable offence (He, he, he).

Canada Census figures are complex: Look at the "Ethnocultural Portrait of Canada, 2001 Census." The principal categories are:
Total visible minorities
Chinese
South Asian
Black
Filipino

Ethnic origins (a long section on the Canadian Census) range from Canadian (12 mil), English 6 million, French 5 million, Scottish 4 million down to 16000 Algerians and 15000 Bulgarians. Provincial figures include 340 Quebecois in the province of Alberta (I didn't check for separatists in British Columbia).
Then there are the half-breeds, the Metis, included among the 800,000 aboriginals, counted separately, along with First Nations, etc., etc.
Population by Religion
Catholic 13 million
Protestant 9 million
Christian Orthodox 0.5 million
Muslim 0.6 million
etc. and
4.9 million with no religious affiliation.

Just remember, it is an offence to make false statements on the Census form.