| Value | Category | Cases | |
|---|---|---|---|
| -9 | -9. don't know | 17 | 
                                                                 
                                    
                                    63%
                                 
                                                             | 
                                                        
                    
| -8 | -8. refused | 3 | 
                                                                 
                                    
                                    11.1%
                                 
                                                             | 
                                                        
                    
| 0 | 6 | 
                                                                 
                                    
                                    22.2%
                                 
                                                             | 
                                                        
                    |
| 1200 | 1 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 72 |