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Table 12
Overview of the industrial classifications available from 1971 to 2006 censuses

Table 12
Overview of the industrial classifications available from 1971 to 2006 censuses
Classifications used to code responses	Census years for which data can be compared	Comments
Source: Statistics Canada, 2006 Census of Population.
2002 North American Industry Classification System	2001, 2006	To compare the 2001 and 2006 data, the variable Industry (historical) should be used.
1997 North American Industry Classification System	2001	No comments
1980 Standard Industrial Classification	1986, 1991, 1996, 2001	The 2001 Census industry responses are coded to the 1980 Standard Industrial Classification codes. This allows for comparison between the 1986, 1991, 1996 and 2001 censuses. This is the only industrial classification available for the 1996 Census.
1970 Standard Industrial Classification	1971, 1981, 1986, 1991	For comparisons with 1971 data, adjustments must be made to the 1981, 1986 and 1991 labour force universes. (See Appendix E for further information on historical comparability of labour force data.)