| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 | 
                                    
                                    0.6%
                                 | 
| 0 | 7 | 
                                    
                                    4.5%
                                 | |
| 1 | 1 | 
                                    
                                    0.6%
                                 | |
| 4 | 1 | 
                                    
                                    0.6%
                                 | |
| 5 | 2 | 
                                    
                                    1.3%
                                 | |
| 6 | 1 | 
                                    
                                    0.6%
                                 | |
| 7 | 1 | 
                                    
                                    0.6%
                                 | |
| 10 | 2 | 
                                    
                                    1.3%
                                 | |
| 16 | 1 | 
                                    
                                    0.6%
                                 | |
| 20 | 4 | 
                                    
                                    2.5%
                                 | |
| 30 | 13 | 
                                    
                                    8.3%
                                 | |
| 31 | 1 | 
                                    
                                    0.6%
                                 | |
| 35 | 1 | 
                                    
                                    0.6%
                                 | |
| 40 | 7 | 
                                    
                                    4.5%
                                 | |
| 50 | 3 | 
                                    
                                    1.9%
                                 | |
| 60 | 3 | 
                                    
                                    1.9%
                                 | |
| 70 | 6 | 
                                    
                                    3.8%
                                 | |
| 80 | 4 | 
                                    
                                    2.5%
                                 | |
| 85 | 1 | 
                                    
                                    0.6%
                                 | |
| 90 | 5 | 
                                    
                                    3.2%
                                 | |
| 97 | 1 | 
                                    
                                    0.6%
                                 | |
| 99 | 1 | 
                                    
                                    0.6%
                                 | |
| 100 | 90 | 
                                    
                                    57.3%
                                 |