Table 1. Information on the carcass grade, carcass weight, backfat thickness of commercial pig and cull sow

Number	Commercial pigs			Cull sows
	Carcass grade	Carcass weight (kg)	Backfat thickness (mm)	Carcass grade	Carcass weight (kg)	Backfat thickness (mm)
1	1+	83	21	Off-grade	194	27
2	1+	87	19	Off-grade	192	23
3	1+	88	23	Off-grade	195	31
4	1+	88	18	Off-grade	185	28
5	1+	88	17	Off-grade	191	25
6	1+	86	19	Off-grade	183	29
7	1+	90	22	Off-grade	184	23
8	1+	92	19	Off-grade	191	18
9	1+	87	20	Off-grade	185	22
10	1+	91	19	Off-grade	193	26
11	1+	89	18	Off-grade	189	30
12	1	91	20	Off-grade	194	29
13	1	90	20	Off-grade	189	24
14	1	87	26	Off-grade	187	25
15	1	90	22	Off-grade	190	23
16	1+	91	17	Off-grade	195	34
17	1+	85	19	Off-grade	183	22
18	1	88	15	Off-grade	187	25
19	1	92	22	Off-grade	183	20
20	1+	90	19	Off-grade	185	19
Mean	-	88.65	19.75	-	188.75	25.15