| Value | Category | 
|---|---|
| -9 | Not stated | 
| 1 | Rice | 
| 2 | Wheat | 
| 3 | Millet | 
| 4 | Sorghum | 
| 5 | Maize | 
| 6 | Cassava | 
| 7 | Irish potatoes | 
| 8 | Sweet potatoes | 
| 9 | Yams | 
| 10 | Beans | 
| 11 | Groundnuts | 
| 12 | Lentils | 
| 13 | Peas | 
| 14 | Soybeans | 
| 15 | Cabbage | 
| 16 | Other leafy vegetables | 
| 17 | Lettuce | 
| 18 | Tomatoes | 
| 19 | Coffee | 
| 20 | Tea | 
| 21 | Cotton | 
| 22 | Other | 
| Sysmiss |