| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | 10 | 
                                    
                                    2.8%
                                 | |
| 20 | 1 | 
                                    
                                    0.3%
                                 | |
| 30 | 1 | 
                                    
                                    0.3%
                                 | |
| 50 | 1 | 
                                    
                                    0.3%
                                 | |
| 69 | 1 | 
                                    
                                    0.3%
                                 | |
| 70 | 1 | 
                                    
                                    0.3%
                                 | |
| 80 | 1 | 
                                    
                                    0.3%
                                 | |
| 90 | 1 | 
                                    
                                    0.3%
                                 | |
| 100 | 346 | 
                                    
                                    95.3%
                                 |