| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                    
                                    0.9%
                                 | 
| 0 | 181 | 
                                    
                                    84.2%
                                 | |
| 2 | 6 | 
                                    
                                    2.8%
                                 | |
| 5 | 2 | 
                                    
                                    0.9%
                                 | |
| 10 | 5 | 
                                    
                                    2.3%
                                 | |
| 15 | 1 | 
                                    
                                    0.5%
                                 | |
| 20 | 4 | 
                                    
                                    1.9%
                                 | |
| 25 | 2 | 
                                    
                                    0.9%
                                 | |
| 30 | 1 | 
                                    
                                    0.5%
                                 | |
| 40 | 1 | 
                                    
                                    0.5%
                                 | |
| 41 | 1 | 
                                    
                                    0.5%
                                 | |
| 45 | 1 | 
                                    
                                    0.5%
                                 | |
| 60 | 1 | 
                                    
                                    0.5%
                                 | |
| 70 | 2 | 
                                    
                                    0.9%
                                 | |
| 95 | 1 | 
                                    
                                    0.5%
                                 | |
| 100 | 4 | 
                                    
                                    1.9%
                                 |