Table 9. Percent breakdown of observations among different body part by thinning for young tree operation(Site 5).

	CODE	Worker 15(%)	Worker 16(%)	Worker 17(%)
Back posture	1	51.7	46.1	57.1
	2	27.9	37.3	23.8
	3	4.8	4.9	6.7
	4	15.6	11.8	12.4
Arm posture	1	89.8	92.7	89.5
	2	8.2	6.4	9.5
	3	2.0	1.0	1.0
Leg posture	1	0.7	-	-
	2	34.0	40.2	46.7
	3	-	-	-
	4	0.7	1.5	1.0
	5	34.7	40.7	31.4
	6	1.4	-	-
	7	28.6	17.6	21.0
External load	1	-	-	-
	2	100.0	100.0	100.0
	3	-	-	-