| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 30 | 
                                    
                                    30.9%
                                 | 
| 1 | 5 | 
                                    
                                    5.2%
                                 | |
| 2 | 4 | 
                                    
                                    4.1%
                                 | |
| 3 | 11 | 
                                    
                                    11.3%
                                 | |
| 4 | 13 | 
                                    
                                    13.4%
                                 | |
| 5 | 11 | 
                                    
                                    11.3%
                                 | |
| 6 | 8 | 
                                    
                                    8.2%
                                 | |
| 7 | 9 | 
                                    
                                    9.3%
                                 | |
| 8 | 2 | 
                                    
                                    2.1%
                                 | |
| 9 | 3 | 
                                    
                                    3.1%
                                 | |
| 11 | 1 | 
                                    
                                    1%
                                 |