| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                                                 
                                    
                                    25%
                                 
                                                             | 
                                                        
                    
| 0 | 2 | 
                                                                 
                                    
                                    16.7%
                                 
                                                             | 
                                                        
                    |
| 2000 | 3 | 
                                                                 
                                    
                                    25%
                                 
                                                             | 
                                                        
                    |
| 5000 | 2 | 
                                                                 
                                    
                                    16.7%
                                 
                                                             | 
                                                        
                    |
| 12000 | 1 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    |
| 25000 | 1 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 229 |