What does the 9 code meam?
Just did a Google. #9 is (not Stated). Question 9 is “Race of Father”. Another 9 is “Kind of Business or Industry” of the Father, also noted as a #9. It would appear that these questions are coded in transfer to a Federal type registry.
I guess like a census. What I looked at said it had something to do with population and distribution of federal funds. Guess also that could impact numbers for Representation ie: Congress?? I da know. So a 9 code is said to mean no answer was given at the time.
Zullo explains what number "9 code" means here on Channel 15 KNXV/ABC news Phoenix. See news interview - video (@ 2:45 min).