| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 | 
                                    
                                    9%
                                 | 
| 0 | 6 | 
                                    
                                    5.4%
                                 | |
| 1 | 8 | 
                                    
                                    7.2%
                                 | |
| 2 | 14 | 
                                    
                                    12.6%
                                 | |
| 3 | 8 | 
                                    
                                    7.2%
                                 | |
| 4 | 13 | 
                                    
                                    11.7%
                                 | |
| 5 | 10 | 
                                    
                                    9%
                                 | |
| 6 | 6 | 
                                    
                                    5.4%
                                 | |
| 7 | 1 | 
                                    
                                    0.9%
                                 | |
| 8 | 8 | 
                                    
                                    7.2%
                                 | |
| 9 | 2 | 
                                    
                                    1.8%
                                 | |
| 10 | 4 | 
                                    
                                    3.6%
                                 | |
| 11 | 2 | 
                                    
                                    1.8%
                                 | |
| 12 | 2 | 
                                    
                                    1.8%
                                 | |
| 13 | 1 | 
                                    
                                    0.9%
                                 | |
| 14 | 2 | 
                                    
                                    1.8%
                                 | |
| 15 | 2 | 
                                    
                                    1.8%
                                 | |
| 16 | 2 | 
                                    
                                    1.8%
                                 | |
| 17 | 1 | 
                                    
                                    0.9%
                                 | |
| 18 | 1 | 
                                    
                                    0.9%
                                 | |
| 22 | 1 | 
                                    
                                    0.9%
                                 | |
| 25 | 3 | 
                                    
                                    2.7%
                                 | |
| 30 | 1 | 
                                    
                                    0.9%
                                 | |
| 40 | 1 | 
                                    
                                    0.9%
                                 | |
| 55 | 1 | 
                                    
                                    0.9%
                                 | |
| 115 | 1 | 
                                    
                                    0.9%
                                 |