Context: The 2000 U.S. Census in the write-in response category had a code listing which standardizes the placement of various write-in responses for automatic placement within the framework of the U.S. Census's enumerated races. Whereas most responses can be distinguished as falling into one of the five enumerated races, there remains some write-in responses which fall into the "Mixture" heading which cannot be racially categorized. These include "Bi Racial, Combination, Everything, Many, Mixed, Multi National, Multiple, Several and Various".

Question: What does the "mixture" heading mean?
Answer: cannot be racially categorized

Question: What year did the US Census write in response category have a code-listing?
Answer: 2000

Question: Bi-racial would be coded as what?
Answer: Mixture

Question: How many race options were there?
Answer: five enumerated races

Question: What did the 1990 census have in the write-in response category?
Answer: Unanswerable

Question: What did the code listing destandardize?
Answer: Unanswerable

Question: What heading can be racially categorized?
Answer: Unanswerable

Question: In what year did the census have eight enumerated races?
Answer: Unanswerable

Question: How many race options did the Canadian census have?
Answer: Unanswerable