Example sentences of "population at a [adj] " in BNC.

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1 The necessities of equipping the armed forces , preserving the home population at a decent minimum level and running an efficient war economy brought government control and direction into almost every aspect of people 's lives .
2 Remember that none of the rockdwellers like being crowded so keep the population at a sensible level .
3 There are two key measures : ( 1 ) the incidence rate ( the number of new cases over a given period , usually a year ) and ( 2 ) the prevalence rate ( the number of cases/persons affected in the population at a particular moment in time ) .
4 A pictorial representation of the age-sex structure of a population at a particular time is provided by an age-sex profile or population pyramid .
5 The simplest way in which these changes may be projected through time is to take the total population at a given instant and to alter it year by year ( or by some other period of time ) according to a chosen assumption about future growth or decline .
6 On balance , the large families left just enough people alive to keep the total population at a steady size .
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