| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                    
                                    0.9%
                                 | 
| 0 | 198 | 
                                    
                                    92.1%
                                 | |
| 1 | 3 | 
                                    
                                    1.4%
                                 | |
| 2 | 1 | 
                                    
                                    0.5%
                                 | |
| 5 | 2 | 
                                    
                                    0.9%
                                 | |
| 10 | 1 | 
                                    
                                    0.5%
                                 | |
| 25 | 1 | 
                                    
                                    0.5%
                                 | |
| 30 | 2 | 
                                    
                                    0.9%
                                 | |
| 35 | 1 | 
                                    
                                    0.5%
                                 | |
| 50 | 3 | 
                                    
                                    1.4%
                                 | |
| 70 | 1 | 
                                    
                                    0.5%
                                 |