| Value | Category | Cases | |
|---|---|---|---|
| 1 | Earth | 695 |
35%
|
| 2 | Rammed earth | 764 |
38.4%
|
| 3 | Cement screed | 427 |
21.5%
|
| 4 | Concrete | 23 |
1.2%
|
| 5 | Tiles | 67 |
3.4%
|
| 6 | Brick | 2 |
0.1%
|
| 7 | Stone | 5 |
0.3%
|
| 8 | Wood | 4 |
0.2%
|