| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 40 | 
                                    
                                    29.4%
                                 | 
| -5 | Refund still outstanding | 2 | 
                                    
                                    1.5%
                                 | 
| 1 | One week or less | 10 | 
                                    
                                    7.4%
                                 | 
| 2 | 8 | 
                                    
                                    5.9%
                                 | |
| 3 | 7 | 
                                    
                                    5.1%
                                 | |
| 4 | 30 | 
                                    
                                    22.1%
                                 | |
| 5 | 3 | 
                                    
                                    2.2%
                                 | |
| 6 | 8 | 
                                    
                                    5.9%
                                 | |
| 8 | 8 | 
                                    
                                    5.9%
                                 | |
| 9 | 1 | 
                                    
                                    0.7%
                                 | |
| 10 | 3 | 
                                    
                                    2.2%
                                 | |
| 12 | 8 | 
                                    
                                    5.9%
                                 | |
| 18 | 1 | 
                                    
                                    0.7%
                                 | |
| 24 | 1 | 
                                    
                                    0.7%
                                 | |
| 45 | 2 | 
                                    
                                    1.5%
                                 | |
| 60 | 1 | 
                                    
                                    0.7%
                                 | |
| 78 | 1 | 
                                    
                                    0.7%
                                 | |
| 90 | 2 | 
                                    
                                    1.5%
                                 | |
| Sysmiss | 476 |