| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| -7 | No dispute has been resolved | 1 | 
                                    
                                    100%
                                 | 
| 0 | Less than one month | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 149 |