| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    
| 0 | 32 | 
                                                                 
                                    
                                    44.4%
                                 
                                                             | 
                                                        
                    |
| 1 | 4 | 
                                                                 
                                    
                                    5.6%
                                 
                                                             | 
                                                        
                    |
| 2 | 6 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    |
| 3 | 5 | 
                                                                 
                                    
                                    6.9%
                                 
                                                             | 
                                                        
                    |
| 4 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 5 | 11 | 
                                                                 
                                    
                                    15.3%
                                 
                                                             | 
                                                        
                    |
| 6 | 3 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 9 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 10 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 12 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 15 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 20 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 21 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 30 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 50 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 292 |