| Value |
Category |
| 11 |
Earth, sand, soil |
| 12 |
Dung |
| 21 |
Wood planks |
| 32 |
Concrete, vinyl or asphalt strips |
| 34 |
Cement |
| 96 |
Other |
| 99 |
Missing |
| Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.