| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                    
                                    0.9%
                                 | 
| 0 | 27 | 
                                    
                                    12.6%
                                 | |
| 1 | 1 | 
                                    
                                    0.5%
                                 | |
| 20 | 1 | 
                                    
                                    0.5%
                                 | |
| 24 | 1 | 
                                    
                                    0.5%
                                 | |
| 25 | 1 | 
                                    
                                    0.5%
                                 | |
| 30 | 1 | 
                                    
                                    0.5%
                                 | |
| 35 | 1 | 
                                    
                                    0.5%
                                 | |
| 40 | 1 | 
                                    
                                    0.5%
                                 | |
| 50 | 5 | 
                                    
                                    2.3%
                                 | |
| 65 | 1 | 
                                    
                                    0.5%
                                 | |
| 90 | 2 | 
                                    
                                    0.9%
                                 | |
| 99 | 1 | 
                                    
                                    0.5%
                                 | |
| 100 | 170 | 
                                    
                                    79.1%
                                 |