| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 5 | 40 | 
                                    
                                    26.7%
                                 | |
| 6 | 20 | 
                                    
                                    13.3%
                                 | |
| 7 | 7 | 
                                    
                                    4.7%
                                 | |
| 8 | 11 | 
                                    
                                    7.3%
                                 | |
| 9 | 5 | 
                                    
                                    3.3%
                                 | |
| 10 | 7 | 
                                    
                                    4.7%
                                 | |
| 11 | 7 | 
                                    
                                    4.7%
                                 | |
| 12 | 6 | 
                                    
                                    4%
                                 | |
| 13 | 4 | 
                                    
                                    2.7%
                                 | |
| 14 | 1 | 
                                    
                                    0.7%
                                 | |
| 15 | 6 | 
                                    
                                    4%
                                 | |
| 16 | 2 | 
                                    
                                    1.3%
                                 | |
| 17 | 2 | 
                                    
                                    1.3%
                                 | |
| 18 | 3 | 
                                    
                                    2%
                                 | |
| 20 | 4 | 
                                    
                                    2.7%
                                 | |
| 22 | 3 | 
                                    
                                    2%
                                 | |
| 23 | 2 | 
                                    
                                    1.3%
                                 | |
| 25 | 3 | 
                                    
                                    2%
                                 | |
| 30 | 3 | 
                                    
                                    2%
                                 | |
| 33 | 1 | 
                                    
                                    0.7%
                                 | |
| 35 | 3 | 
                                    
                                    2%
                                 | |
| 40 | 1 | 
                                    
                                    0.7%
                                 | |
| 50 | 2 | 
                                    
                                    1.3%
                                 | |
| 65 | 1 | 
                                    
                                    0.7%
                                 | |
| 80 | 1 | 
                                    
                                    0.7%
                                 | |
| 82 | 1 | 
                                    
                                    0.7%
                                 | |
| 94 | 1 | 
                                    
                                    0.7%
                                 | |
| 96 | 1 | 
                                    
                                    0.7%
                                 | |
| 110 | 1 | 
                                    
                                    0.7%
                                 | |
| 120 | 1 | 
                                    
                                    0.7%
                                 |