| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 | 
                                    
                                    5.1%
                                 | 
| -8 | Refusal (spontaneous) | 3 | 
                                    
                                    1%
                                 | 
| 0 | No payments | 259 | 
                                    
                                    87.8%
                                 | 
| 1 | 1 | 
                                    
                                    0.3%
                                 | |
| 2 | 3 | 
                                    
                                    1%
                                 | |
| 3 | 1 | 
                                    
                                    0.3%
                                 | |
| 5 | 4 | 
                                    
                                    1.4%
                                 | |
| 10 | 6 | 
                                    
                                    2%
                                 | |
| 15 | 1 | 
                                    
                                    0.3%
                                 | |
| 20 | 1 | 
                                    
                                    0.3%
                                 | |
| 30 | 1 | 
                                    
                                    0.3%
                                 | |
| Sysmiss | 660 |