| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manual | 2462 | 77340 | 
                                    
                                    88.2%
                                 | 
| 2 | Special tools | 88 | 993 | 
                                    
                                    1.1%
                                 | 
| 3 | Both methods | 55 | 357 | 
                                    
                                    0.4%
                                 | 
| Sysmiss | 507 | 8990 |