| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                    
                                    33.3%
                                 | 
| -5 | Refund still outstanding | 6 | 
                                    
                                    66.7%
                                 | 
| 1 | One week or less | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 354 |