| Value | Category | Cases | |
|---|---|---|---|
| 1 | Metal | 452 |
11.7%
|
| 2 | Palstic | 2613 |
67.8%
|
| 3 | Concrete | 25 |
0.6%
|
| 4 | Both | 662 |
17.2%
|
| Sysmiss | 102 |