| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    
| 0 | 52 | 
                                                                 
                                    
                                    18.8%
                                 
                                                             | 
                                                        
                    |
| 1 | 45 | 
                                                                 
                                    
                                    16.3%
                                 
                                                             | 
                                                        
                    |
| 2 | 43 | 
                                                                 
                                    
                                    15.6%
                                 
                                                             | 
                                                        
                    |
| 3 | 26 | 
                                                                 
                                    
                                    9.4%
                                 
                                                             | 
                                                        
                    |
| 4 | 20 | 
                                                                 
                                    
                                    7.2%
                                 
                                                             | 
                                                        
                    |
| 5 | 15 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    |
| 6 | 9 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    |
| 7 | 2 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 8 | 13 | 
                                                                 
                                    
                                    4.7%
                                 
                                                             | 
                                                        
                    |
| 9 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 10 | 5 | 
                                                                 
                                    
                                    1.8%
                                 
                                                             | 
                                                        
                    |
| 11 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 12 | 9 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    |
| 15 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 16 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 20 | 3 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 22 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 23 | 14 | 
                                                                 
                                    
                                    5.1%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 1170 |