| Value | Category |
|---|---|
| 01 | Bricks |
| 02 | Stone and cement |
| 03 | Stone and mud |
| 04 | Blockets |
| 05 | Wood and mud |
| 06 | Bamboo, mud or reed |
| 07 | Concrete or cement |
| 08 | Corrugated iron |
| 09 | Other |
| 98 | Unknown |
| 99 | NIU (not in universe) |
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