| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    
| 1 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 5 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 10 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 15 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 18 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 20 | 6 | 
                                                                 
                                    
                                    10%
                                 
                                                             | 
                                                        
                    |
| 25 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 32 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 33 | 6 | 
                                                                 
                                    
                                    10%
                                 
                                                             | 
                                                        
                    |
| 35 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 49 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 50 | 11 | 
                                                                 
                                    
                                    18.3%
                                 
                                                             | 
                                                        
                    |
| 100 | 26 | 
                                                                 
                                    
                                    43.3%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 328 |