| Value | Category | Cases | |
|---|---|---|---|
| 1 | Constructed | 35 | 
                                                                 
                                    
                                    27.8%
                                 
                                                             | 
                                                        
                    
| 2 | Extension | 11 | 
                                                                 
                                    
                                    8.7%
                                 
                                                             | 
                                                        
                    
| 3 | Repair | 80 | 
                                                                 
                                    
                                    63.5%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 3450 |