| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 20 | 2 | 
                                                                 
                                    
                                    25%
                                 
                                                             | 
                                                        
                    |
| 22 | 1 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    |
| 24 | 1 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    |
| 50 | 1 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    |
| 74 | 1 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    |
| 94 | 1 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    |
| 172 | 1 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 201 |