| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manual | 423 | 622 |
18.9%
|
| 2 | Special tools | 5 | 5 |
0.2%
|
| 3 | Both methods | 13 | 27 |
0.8%
|
| Sysmiss | 419 | 2628 |