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 |