| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 | 
                                                                 
                                    
                                    9.8%
                                 
                                                             | 
                                                        
                    
| 0 | 5 | 
                                                                 
                                    
                                    12.2%
                                 
                                                             | 
                                                        
                    |
| 1 | 7 | 
                                                                 
                                    
                                    17.1%
                                 
                                                             | 
                                                        
                    |
| 2 | 1 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    |
| 5 | 6 | 
                                                                 
                                    
                                    14.6%
                                 
                                                             | 
                                                        
                    |
| 10 | 8 | 
                                                                 
                                    
                                    19.5%
                                 
                                                             | 
                                                        
                    |
| 30 | 1 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    |
| 50 | 2 | 
                                                                 
                                    
                                    4.9%
                                 
                                                             | 
                                                        
                    |
| 70 | 1 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    |
| 100 | 6 | 
                                                                 
                                    
                                    14.6%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 109 |