| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 59 | 
                                                                 
                                    
                                    16.2%
                                 
                                                             | 
                                                        
                    
| 1 | 204 | 
                                                                 
                                    
                                    55.9%
                                 
                                                             | 
                                                        
                    |
| 2 | 57 | 
                                                                 
                                    
                                    15.6%
                                 
                                                             | 
                                                        
                    |
| 3 | 22 | 
                                                                 
                                    
                                    6%
                                 
                                                             | 
                                                        
                    |
| 4 | 9 | 
                                                                 
                                    
                                    2.5%
                                 
                                                             | 
                                                        
                    |
| 5 | 4 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 6 | 2 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 7 | 4 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 9 | 2 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 10 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 12 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 1081 |