| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                    
                                    2.1%
                                 | 
| 0 | 33 | 
                                    
                                    34%
                                 | |
| 1 | 36 | 
                                    
                                    37.1%
                                 | |
| 2 | 18 | 
                                    
                                    18.6%
                                 | |
| 3 | 6 | 
                                    
                                    6.2%
                                 | |
| 4 | 1 | 
                                    
                                    1%
                                 | |
| 5 | 1 | 
                                    
                                    1%
                                 |