| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manual | 418 | 883 |
24.9%
|
| 2 | Special tools | 8 | 14 |
0.4%
|
| 3 | Both methods | 11 | 13 |
0.4%
|
| Sysmiss | 310 | 2641 |