| Value | Category | Cases | |
|---|---|---|---|
| 1 | Earth | 639 |
20.4%
|
| 2 | Wood (plywood) | 22 |
0.7%
|
| 3 | Stone/brick | 14 |
0.4%
|
| 4 | Cement | 2427 |
77.6%
|
| 5 | Tile | 14 |
0.4%
|
| 6 | Bamboo | 1 |
0%
|
| 7 | Other | 10 |
0.3%
|