2006, 2001, 1996, 1991, 1986, 1981, 1976, 1971, 1966, 1961
Refer to the related definition of urban area (UA).
From 1986 to 1996, there was an urban population size group for 'under 1,000'. This group included those urban areas that had met the necessary population concentration and density criteria at the previous census, but had declined in population to under 1,000 for the current year.
Prior to 1986, the following population size groups were used:
Prior to 1976, the term 'municipal size group' was used.