| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manual | 87 | 274 |
7.7%
|
| 2 | Special tools | 5 | 6 |
0.2%
|
| 3 | Both methods | 9 | 11 |
0.3%
|
| Sysmiss | 818 | 3262 |