Meaning of "not applicable" in 2006 census profile data

Question

A student in an urban studies course pointed out to me that most of the data (everything from the long form, it seems) for census tract 5350033.00 was missing in the profile for 2006; the missing data were replaced by an 'N'. 

It took a bit of digging to discover that 'N' stood for 'not applicable'. Nowhere does it explain what this might mean, either in a general or specific sense. The CT in question had a population of 5528, so it wasn't a suppression due to low population. 

Are non-response rates for individual CTs available anywhere for 2006? Would there have been any other reason to suppress the long-form data?

Answer

It seems as though that one was suppressed:
http://www12.statcan.ca/census-recensement/2006/ref/notes/sup_CT2B-SR2B-eng.cfm

Income Data at Postal Code

Question

Are there any income data available at the postal code level. If yes, can you point me in the right direction?

Thank you.

Answer

The Profile for Canada, Provinces, Territories and Forward Sortation Areas, 2006 Census (94-581-XCB2006003) provides income data at the FSA level (first three characters of the postal code).

http://www12.statcan.gc.ca/census-recensement/2006/dp-pd/prof/rel/Rp-eng.cfm?TABID=1&LANG=E&A=R&APATH=3&DETAIL=0&DIM=0&FL=A&FREE=0&GC=01&GID=841141&GK=1&GRP=1&O=D&PID=94535&PRID=0&PTYPE=89103&S=0&SHOWALL=0&SUB=0&Temporal=2006&THEME=81&VID=0&VNAMEE=&VNAMEF=&D1=0&D2=0&D3=0&D4=0&D5=0&D6=0

The 2006 Census Census Tract Profiles include income data and have a search by postal code option which may be of interest to your client.

http://www12.statcan.gc.ca/census-recensement/2006/dp-pd/prof/92-597/index.cfm?Lang=E

Please let me know if these products don't meet your user's needs and I will be pleased to look into this further and to recommend other products.