| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                    
                                    2%
                                 | 
| 0 | 26 | 
                                    
                                    17.3%
                                 | |
| 1 | 16 | 
                                    
                                    10.7%
                                 | |
| 2 | 34 | 
                                    
                                    22.7%
                                 | |
| 3 | 11 | 
                                    
                                    7.3%
                                 | |
| 4 | 14 | 
                                    
                                    9.3%
                                 | |
| 5 | 9 | 
                                    
                                    6%
                                 | |
| 6 | 9 | 
                                    
                                    6%
                                 | |
| 7 | 3 | 
                                    
                                    2%
                                 | |
| 8 | 5 | 
                                    
                                    3.3%
                                 | |
| 10 | 10 | 
                                    
                                    6.7%
                                 | |
| 11 | 1 | 
                                    
                                    0.7%
                                 | |
| 12 | 1 | 
                                    
                                    0.7%
                                 | |
| 15 | 4 | 
                                    
                                    2.7%
                                 | |
| 18 | 1 | 
                                    
                                    0.7%
                                 | |
| 20 | 1 | 
                                    
                                    0.7%
                                 | |
| 25 | 1 | 
                                    
                                    0.7%
                                 | |
| 80 | 1 | 
                                    
                                    0.7%
                                 |