Table 3. General Characteristics

Types1		Types2	Population	portion
Company		Airline	72	12.1
		Ground andler	438	73.9
		Airport contractor	83	14.0
Company types	Airline	Engineering	19	26.4
		Service	23	31.9
		Safety mgmt	9	12.5
		etc	21	29.2
	Ground Handler	Driving	118	26.9
		Ground upport	237	54.1
		etc	83	18.9
	Airport contractor	Facility maintanance	61	74.4
		etc	21	25.6
Work Experience		Less than 1year	79	13.3
		1~5	173	29.2
		5~10	132	22.3
		10~15	78	13.2
		15~20	52	8.8
		20	79	13.3
Training Experience		Yes	502	84.7
		No	91	15.3
		Total	593	100.0