| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 1 | 89 | 
                                                                 
                                    
                                    42.8%
                                 
                                                             | 
                                                        
                    |
| 2 | 80 | 
                                                                 
                                    
                                    38.5%
                                 
                                                             | 
                                                        
                    |
| 3 | 21 | 
                                                                 
                                    
                                    10.1%
                                 
                                                             | 
                                                        
                    |
| 4 | 8 | 
                                                                 
                                    
                                    3.8%
                                 
                                                             | 
                                                        
                    |
| 5 | 6 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 6 | 1 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 7 | 1 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 34 | 1 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 156 |