| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    
| 0 | 53 | 
                                                                 
                                    
                                    52%
                                 
                                                             | 
                                                        
                    |
| 1 | 10 | 
                                                                 
                                    
                                    9.8%
                                 
                                                             | 
                                                        
                    |
| 2 | 16 | 
                                                                 
                                    
                                    15.7%
                                 
                                                             | 
                                                        
                    |
| 3 | 6 | 
                                                                 
                                    
                                    5.9%
                                 
                                                             | 
                                                        
                    |
| 4 | 3 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 5 | 3 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 7 | 1 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 8 | 1 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 9 | 1 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 10 | 2 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    |
| 11 | 1 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 14 | 1 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 15 | 1 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 16 | 1 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 20 | 1 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 107 |