| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 | 
                                    
                                    4.3%
                                 | 
| -5 | Refund still outstanding | 1 | 
                                    
                                    0.5%
                                 | 
| 1 | One week or less | 5 | 
                                    
                                    2.4%
                                 | 
| 2 | 15 | 
                                    
                                    7.1%
                                 | |
| 3 | 72 | 
                                    
                                    34.1%
                                 | |
| 4 | 55 | 
                                    
                                    26.1%
                                 | |
| 5 | 3 | 
                                    
                                    1.4%
                                 | |
| 6 | 2 | 
                                    
                                    0.9%
                                 | |
| 7 | 2 | 
                                    
                                    0.9%
                                 | |
| 8 | 4 | 
                                    
                                    1.9%
                                 | |
| 10 | 2 | 
                                    
                                    0.9%
                                 | |
| 14 | 1 | 
                                    
                                    0.5%
                                 | |
| 15 | 1 | 
                                    
                                    0.5%
                                 | |
| 18 | 2 | 
                                    
                                    0.9%
                                 | |
| 20 | 4 | 
                                    
                                    1.9%
                                 | |
| 21 | 21 | 
                                    
                                    10%
                                 | |
| 25 | 1 | 
                                    
                                    0.5%
                                 | |
| 30 | 10 | 
                                    
                                    4.7%
                                 | |
| 100 | 1 | 
                                    
                                    0.5%
                                 | |
| Sysmiss | 191 |