Historical Census Data for Laxgalts'ap

Question

I am working with a researcher who needs historical census data going back 20 years (so essentially going back to and including the 1991 Census) for Laxgalts’ap (5949840).

2006 – According to the suppression lists at http://www12.statcan.gc.ca/census-recensement/2006/ref/notes/sup_CSD2A-SDR2A-eng.cfm) and (http://www12.statcan.gc.ca/census-recensement/2006/ref/notes/sup_CSD2B-SDR2B-eng.cfm), the data for Laxgalts’ap was suppressed. As there is data available for Laxgalts’ap in the 2001 Census, and the population in this community actually grew somewhat between 2001 and 2006, I am assuming this was not because of low population numbers but because of a problem with the data. However, it would be nice to be able to provide the researcher with a reason as to why the 2006 data is not available. I could not find this information in any documentation, but I do seem to remember hearing something about some problem in the 2006 Census that resulted in this kind of suppression…

1991 and 1996 – Laxgalts’ap was not a CSD before 2001. The area was included in the Kitimat-Stikine, Subd A CSD (5949037). As I don’t have EA maps for these censuses, I compared the 2006 DA boundary file with the 1996 and 1991 EA boundary files to try to determine the EAs that encompassed Laxgalts’ap in the earlier years. From what I can see, the relevant EAs for 1996 are 59025404 and 59025406 and the relevant EA for 1991 was 59025404. Is it possible to verify this for me please?

Answer

According to the Data Quality Notes for the 2006 Community Profile for Laxgalts’ap, data were suppressed for the following reasons:

• Data quality index showing, for the short census questionnaire (100% data), a global non response rate higher than or equal to 25% (suppressed).
• Data quality index showing, for the long census questionnaire (20% sample data), a global non-response rate higher than or equal to 25% (suppressed).

(See: http://www12.statcan.gc.ca/census-recensement/2006/dp-pd/prof/92-591/details/page_Notes.cfm?Lang=E&Geo1=CSD&Code1=5949840&Geo2=PR&Code2=59&Data=Count&SearchText=Laxgaltsap&SearchType=Begins&SearchPR=01&B1=All&Custom=&DQF=03030)

Further Information

Our geography contact has verified that you found the correct EA’s for Laxgalts’ap in 1991 and 1996. Here is her explanation:

“I used GeoRef 1996 to look up all of the EAs in Kitimat-Stikine, Subd A CSD (5949037) for 1996:

59025121
59025218
59025367
59025401
59025402
59025411
59025430

59025404 belonged to the CSD Lachkaltsap 9 (5949825) in 1996
59025406 belonged to the CSD Lachkaltsap 9 (5949825) in 1996

The 1996 CSD Lachkaltsap 9 (5949825) is now part of the 2006 CSD Laxgalts’ap (5949840) as of 11/05/2000. Only the 1996 EAs 59025404 and 59025406 are part of the 2006 CSD Laxgalts’ap (5949840).

EAUID96 PRCODE06 CDCODE06 CSDCODE06 GEOCODE06 2006 CSD Name
59025404 59 49 840 5949840 Laxgalts'ap
59025406 59 49 840 5949840 Laxgalts'ap
59025121 59 49 039 5949039 Kitimat-Stikine A
59025218 59 49 035 5949035 Nisga'a
59025367 59 49 035 5949035 Nisga'a
59025401 59 49 039 5949039 Kitimat-Stikine A
59025402 59 49 039 5949039 Kitimat-Stikine A
59025411 59 49 041 5949041 Kitimat-Stikine D
59025430 59 49 039 5949039 Kitimat-Stikine A

I also looked in the 1991EA_1996EA_Correspondence file and confirmed that the client is correct that 59025404 is the relevant EA for 1991.”