Note: Data quality - Siouan languages (Dakota/Sioux)

When comparing the census results to those of the 2001 Census, it appears that there is some overestimation of persons reporting Siouan languages (Dakota/Sioux) in British Columbia and, as a result, also at the Canada level. Although it affects a relatively small population, it is best to apply caution when analysing the census data for Siouan languages (Dakota/Sioux) in these geographies.

For more information on factors that may explain such variances in census data, such as response errors and processing errors, please refer to the 2006 Census Dictionary, Appendix B Data quality, sampling and weighting, confidentiality and random rounding.

Note: Population universe

The population universe of the 2006 Census includes the following groups:
- Canadian citizens (by birth or by naturalization) and landed immigrants with a usual place of residence in Canada;
- Canadian citizens (by birth or by naturalization) and landed immigrants who are abroad, either on a military base or attached to a diplomatic mission;
- Canadian citizens (by birth or by naturalization) and landed immigrants at sea or in port aboard merchant vessels under Canadian registry;
- persons with a usual place of residence in Canada who are claiming refugee status and members of their families living with them;
- persons with a usual place of residence in Canada who hold Study Permits and members of their families living with them;
- persons with a usual place of residence in Canada who hold Work Permits and members of their families living with them.

For census purposes, the last three groups in this list are referred to as 'non-permanent residents'. For further information, refer to the variable Immigration: Non-permanent resident found in the 2006 Census Dictionary, catalogue number 92-566-XWE or 92-566-XPE.