| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | 7 | 
                                    
                                    7.1%
                                 | |
| 30 | 2 | 
                                    
                                    2%
                                 | |
| 40 | 2 | 
                                    
                                    2%
                                 | |
| 50 | 8 | 
                                    
                                    8.2%
                                 | |
| 60 | 1 | 
                                    
                                    1%
                                 | |
| 69 | 1 | 
                                    
                                    1%
                                 | |
| 70 | 2 | 
                                    
                                    2%
                                 | |
| 90 | 1 | 
                                    
                                    1%
                                 | |
| 100 | 74 | 
                                    
                                    75.5%
                                 | |
| Sysmiss | 213 |