Item

1980

1981

1983

1984

Number of days to raise a pig

302

297

266

274

Average gross weight (jin)

196

213

206

222

Average purchase price per 100 (jin)

65

68

67

75

Average sale price per head

127

144

137

167

a) Costs

Average cost of material inputs per head

112

122

121

134

Price of piglets

20

25

26

28

Price of refined feed

43

48

53

59

Amount of feed (jin)

401

443

473

526

Price of Green and coarse fodder

31

30

24

29

Quantity of green and coarse fodder (jin)

2003

1681

1347

1325

Processing feed and fuel costs

10

11

10

10

b) Labor costs

Average wage per worker

21

29

26

38

Number of workers

34

33

25

25

c) Total costs

133

151

148

172

Average net income per head

−5

−7

−10

−5

Average manure price per head

25

27

23

21

Net income per head

19

20

13

16