Buildings in Hong Kong are much taller on average therefore you don't need as many elevator instances to serve them. About 150m is the best height to optimise e

Buildings in Hong Kong are much taller on average therefore you don't need as many elevator instances to serve them. About 150m is the best height to optimise elevator floor area take versus area gained from additional floors. From the other comment, buildings in Spain tend to be 6-10 storeys (20-30m) whereas at a guess I would say that the average height in Hong Kong is much closer to 150m, hence the more efficient use of elevators per head of population.