| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manual | 257 | 799 | 
                                                                 
                                    
                                    24.3%
                                 
                                                             | 
                            
                        
                        
                            
                    
| 2 | Special tools | 8 | 9 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                            
                        
                        
                            
                    
| 3 | Both methods | 12 | 16 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                            
                        
                        
                            
                    
| Sysmiss | 583 | 2459 |