| Value | Category | 
|---|---|
| -5 | other | 
| -4 | missing data | 
| -3 | refused to answer | 
| -2 | not applicable | 
| -1 | do not know | 
| 1 | traditional material | 
| 2 | shack (plastic, cardboard, plywood) | 
| 3 | permanent without guttering (corrugated iron, tile, asbestos | 
| 4 | permenent with guttering (corrugated iron, tile, asbestos) | 
| Sysmiss |