Table 1: Requirements for ambulance services (units: frequency, %).

Areas place place placeWeighted total frequencies ×

Traffic collisions88 (66.2)15 (11.3)14 (10.5)308
Non-traffic injuries23 (17.3)46 (34.6)30 (22.6)191
Emergency disease14 (10.5)49 (36.8)49 (36.8)189
Drug intoxication2 (1.5)5 (3.8)9 (6.8)25
Hospital to hospital transporting6 (4.5)18 (13.5)30 (22.6)84
Others--1 (0.8)1

total frequencies (score) = frequencies of place cases × 3 + frequencies of place cases × 2 + frequencies of place cases × 1.