| Value | Category |
|---|---|
| 10 | NATURAL |
| 11 | Bark/straw/branch/bamboo |
| 20 | RUDIMENTARY |
| 21 | Plastic/Carton/Used metal sheet |
| 30 | FINISHED |
| 31 | Corrugated iron sheet |
| 32 | Cob/daub/mud/clay |
| 33 | Wood/branches |
| 34 | Semihard/semifinished/other |
| 35 | Breeze blocks/parpens/stones/cement |
| 96 | OTHER |