| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cement | 3247 |
9.7%
|
| 2 | Tiles/ceramic | 28923 |
86.5%
|
| 3 | Steel/zinc | 661 |
2%
|
| 4 | Wood | 54 |
0.2%
|
| 5 | Dirt | 530 |
1.6%
|
| 97 | Other (specify) | 18 |
0.1%
|
| Sysmiss | 17 |