| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Metal | 553 | 2281 |
69.5%
|
| 2 | Plastic | 105 | 350 |
10.7%
|
| 3 | Others, specify | 5 | 22 |
0.7%
|
| Sysmiss | 197 | 629 |