| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 | 
                                                                 
                                    
                                    37.5%
                                 
                                                             | 
                                                        
                    
| 0 | 1 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 1 | 6 | 
                                                                 
                                    
                                    25%
                                 
                                                             | 
                                                        
                    |
| 5 | 2 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    |
| 8 | 1 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 10 | 1 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 15 | 1 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 100 | 3 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 126 |