| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                    
                                    18.8%
                                 | 
| 0 | 1 | 
                                    
                                    6.3%
                                 | |
| 100 | 1 | 
                                    
                                    6.3%
                                 | |
| 400 | 1 | 
                                    
                                    6.3%
                                 | |
| 600 | 1 | 
                                    
                                    6.3%
                                 | |
| 1000 | 1 | 
                                    
                                    6.3%
                                 | |
| 1500 | 2 | 
                                    
                                    12.5%
                                 | |
| 2000 | 1 | 
                                    
                                    6.3%
                                 | |
| 2500 | 2 | 
                                    
                                    12.5%
                                 | |
| 3000 | 1 | 
                                    
                                    6.3%
                                 | |
| 3500 | 1 | 
                                    
                                    6.3%
                                 | |
| 15000 | 1 | 
                                    
                                    6.3%
                                 | |
| Sysmiss | 134 |