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Table 16A
Overview of the occupational classifications available for the 1971 to 2006 censuses

Table 16A
Overview of the occupational classifications available for the 1971 to 2006 censuses
Classifications used to code responses	Census years for which data can be compared	Comments
Note: During the coding operations in 1981, 1986 and 1991, occupation responses were coded to an interim classification which allowed for the restructuring of the occupation data into the 1971 or 1980 classifications without the need for coding the data twice. Source: Statistics Canada, Census Subject Matter Program.
National Occupational Classification for Statistics 2006 (also available as the National Occupational Classification 2006)	2001, 2006	The NOC-S 2006 is a minor update of the NOC-S 2001. Data based on the NOC-S 2006 are directly comparable with data based on the NOC-S 2001.
National Occupational Classification for Statistics 2001 (also available as the National Occupational Classification 2001)	2001, 2006	No comments
1991 Standard Occupational Classification (also available as the National Occupational Classification)	1991, 1996, 2001, 2006	To compare 1991 or 1996 data with 2001 or 2006 data, the variable Occupation (historical) should be used.
1980 Standard Occupational Classification¹	1981, 1986, 1991	No comments
1971 Occupational Classification Manual¹	1971, 1981, 1986, 1991	For comparisons with the 1971 Census 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.)