| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Metal | 510 | 2827 |
79.6%
|
| 2 | Plastic | 90 | 390 |
11%
|
| 3 | Others, specify | 4 | 6 |
0.2%
|
| Sysmiss | 143 | 329 |