In all about 5m Darfuris, out of a population of 6m at the last official count in 2002, are either in camps or are relying on aid to survive.

ECONOMIST: Sudan

We call on the government to improve the population count as a matter of urgency.

BBC: MPs attack migrant count methods

The population of the city already numbers more than half a million, and if you count outlying suburbs and independent cities, the total number of people in the metro area is fast approaching two million, more than double what it was just a decade ago.

BBC: Discover life in the Nevada desert

It has simmered all year over a subject that seems, on its face, bureaucratic and routine: the ten-yearly count of America's population, which will next take place in 2000.

ECONOMIST: The census