| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                                                 
                                    
                                    10.6%
                                 
                                                             | 
                                                        
                    
| 30 | 2 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 50 | 3 | 
                                                                 
                                    
                                    6.4%
                                 
                                                             | 
                                                        
                    |
| 55 | 1 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    |
| 60 | 5 | 
                                                                 
                                    
                                    10.6%
                                 
                                                             | 
                                                        
                    |
| 65 | 1 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    |
| 70 | 7 | 
                                                                 
                                    
                                    14.9%
                                 
                                                             | 
                                                        
                    |
| 72 | 1 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    |
| 75 | 1 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    |
| 80 | 7 | 
                                                                 
                                    
                                    14.9%
                                 
                                                             | 
                                                        
                    |
| 85 | 2 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 90 | 7 | 
                                                                 
                                    
                                    14.9%
                                 
                                                             | 
                                                        
                    |
| 95 | 2 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 98 | 1 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    |
| 100 | 2 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 103 |