| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                    
                                    1.8%
                                 | 
| 8 | 1 | 
                                    
                                    0.9%
                                 | |
| 30 | 3 | 
                                    
                                    2.7%
                                 | |
| 40 | 1 | 
                                    
                                    0.9%
                                 | |
| 50 | 4 | 
                                    
                                    3.6%
                                 | |
| 51 | 1 | 
                                    
                                    0.9%
                                 | |
| 60 | 4 | 
                                    
                                    3.6%
                                 | |
| 70 | 3 | 
                                    
                                    2.7%
                                 | |
| 80 | 9 | 
                                    
                                    8.1%
                                 | |
| 90 | 5 | 
                                    
                                    4.5%
                                 | |
| 95 | 1 | 
                                    
                                    0.9%
                                 | |
| 97 | 1 | 
                                    
                                    0.9%
                                 | |
| 98 | 1 | 
                                    
                                    0.9%
                                 | |
| 100 | 75 | 
                                    
                                    67.6%
                                 |