| Value | Category | Cases | |
|---|---|---|---|
| 1 | Earth | 4611 |
29.5%
|
| 2 | Rammed earth | 5192 |
33.2%
|
| 3 | Cement screed | 5248 |
33.6%
|
| 4 | Concrete | 259 |
1.7%
|
| 5 | Tiles | 268 |
1.7%
|
| 6 | Brick | 43 |
0.3%
|
| 7 | Stone | 11 |
0.1%
|
| 8 | Wood | 4 |
0%
|