| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manual | 299 | 901 |
27.4%
|
| 2 | Special tools | 7 | 13 |
0.4%
|
| 3 | Both methods | 14 | 17 |
0.5%
|
| Sysmiss | 540 | 2351 |