| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 | 
                                    
                                    1%
                                 | 
| 0 | 3 | 
                                    
                                    0.7%
                                 | |
| 1 | 2 | 
                                    
                                    0.5%
                                 | |
| 5 | 1 | 
                                    
                                    0.2%
                                 | |
| 10 | 1 | 
                                    
                                    0.2%
                                 | |
| 25 | 1 | 
                                    
                                    0.2%
                                 | |
| 30 | 1 | 
                                    
                                    0.2%
                                 | |
| 40 | 2 | 
                                    
                                    0.5%
                                 | |
| 45 | 1 | 
                                    
                                    0.2%
                                 | |
| 50 | 3 | 
                                    
                                    0.7%
                                 | |
| 60 | 3 | 
                                    
                                    0.7%
                                 | |
| 70 | 5 | 
                                    
                                    1.2%
                                 | |
| 75 | 1 | 
                                    
                                    0.2%
                                 | |
| 80 | 5 | 
                                    
                                    1.2%
                                 | |
| 90 | 12 | 
                                    
                                    3%
                                 | |
| 95 | 9 | 
                                    
                                    2.2%
                                 | |
| 98 | 6 | 
                                    
                                    1.5%
                                 | |
| 99 | 14 | 
                                    
                                    3.5%
                                 | |
| 100 | 328 | 
                                    
                                    81.6%
                                 |