| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | 277 | 
                                    
                                    76.3%
                                 | |
| 1 | 8 | 
                                    
                                    2.2%
                                 | |
| 2 | 26 | 
                                    
                                    7.2%
                                 | |
| 3 | 11 | 
                                    
                                    3%
                                 | |
| 4 | 10 | 
                                    
                                    2.8%
                                 | |
| 5 | 11 | 
                                    
                                    3%
                                 | |
| 6 | 3 | 
                                    
                                    0.8%
                                 | |
| 7 | 2 | 
                                    
                                    0.6%
                                 | |
| 8 | 3 | 
                                    
                                    0.8%
                                 | |
| 10 | 3 | 
                                    
                                    0.8%
                                 | |
| 12 | 2 | 
                                    
                                    0.6%
                                 | |
| 15 | 1 | 
                                    
                                    0.3%
                                 | |
| 17 | 1 | 
                                    
                                    0.3%
                                 | |
| 20 | 2 | 
                                    
                                    0.6%
                                 | |
| 22 | 1 | 
                                    
                                    0.3%
                                 | |
| 60 | 1 | 
                                    
                                    0.3%
                                 | |
| 202 | 1 | 
                                    
                                    0.3%
                                 |