Definition: Population base - Usual residents
Population base is a technical concept connected with the actual measurement process, the aim of which is to produce the Usual resident population.
The usual residents are:
(a) persons usually resident and present at the time of the Census, and
(b) persons usually resident but temporarily absent at the time of the Census
(c) persons temporarily present at the time of the Census who are usually resident elsewhere
Eurostat, "Guidelines and table programme for the Community programme of population and housing censuses in 2001, Vol. 2: Table Programme", Office for Official Publications of the European Communities, Luxembourg, 1999