| Value |
Category |
| Cement |
|
| Cement floor |
|
| Gravel and sandstones |
|
| Mud and cemented floor |
|
| Normal sand |
|
| Sand |
|
| Sand and stone |
|
| Sandstone |
|
| Sandy |
|
| Sandy soil |
|
| Zink |
|
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.