How many did it take last year
Probably one but you can't generalise.
One. But he gets three hours credit.
Rye-ot
Because they often spend years at C EDIT: made it more punny
It's independent of population size.
Who gives a cluck (I wonder if the moderators will censor this joke merely on the grounds that it is categorically terrible )
Because he looked in the file and that's what they did last year.