| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | 906 | 
                                    
                                    88.5%
                                 | |
| 1 | 22 | 
                                    
                                    2.1%
                                 | |
| 2 | 19 | 
                                    
                                    1.9%
                                 | |
| 3 | 7 | 
                                    
                                    0.7%
                                 | |
| 4 | 16 | 
                                    
                                    1.6%
                                 | |
| 5 | 21 | 
                                    
                                    2.1%
                                 | |
| 6 | 8 | 
                                    
                                    0.8%
                                 | |
| 7 | 2 | 
                                    
                                    0.2%
                                 | |
| 8 | 6 | 
                                    
                                    0.6%
                                 | |
| 9 | 1 | 
                                    
                                    0.1%
                                 | |
| 10 | 10 | 
                                    
                                    1%
                                 | |
| 11 | 1 | 
                                    
                                    0.1%
                                 | |
| 15 | 3 | 
                                    
                                    0.3%
                                 | |
| 20 | 1 | 
                                    
                                    0.1%
                                 | |
| 24 | 1 | 
                                    
                                    0.1%
                                 |