| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 7 | 4 | 
                                                                 
                                    
                                    16.7%
                                 
                                                             | 
                                                        
                    |
| 8 | 1 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 10 | 1 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 14 | 1 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 15 | 2 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    |
| 20 | 2 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    |
| 30 | 8 | 
                                                                 
                                    
                                    33.3%
                                 
                                                             | 
                                                        
                    |
| 45 | 1 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 60 | 2 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    |
| 90 | 2 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 368 |