| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 47 | 
                                    
                                    3.3%
                                 | 
| 0 | 1189 | 
                                    
                                    84%
                                 | |
| 3 | 2 | 
                                    
                                    0.1%
                                 | |
| 5 | 7 | 
                                    
                                    0.5%
                                 | |
| 8 | 1 | 
                                    
                                    0.1%
                                 | |
| 10 | 14 | 
                                    
                                    1%
                                 | |
| 12 | 1 | 
                                    
                                    0.1%
                                 | |
| 13 | 1 | 
                                    
                                    0.1%
                                 | |
| 15 | 3 | 
                                    
                                    0.2%
                                 | |
| 20 | 23 | 
                                    
                                    1.6%
                                 | |
| 25 | 3 | 
                                    
                                    0.2%
                                 | |
| 30 | 20 | 
                                    
                                    1.4%
                                 | |
| 35 | 3 | 
                                    
                                    0.2%
                                 | |
| 40 | 9 | 
                                    
                                    0.6%
                                 | |
| 50 | 13 | 
                                    
                                    0.9%
                                 | |
| 55 | 1 | 
                                    
                                    0.1%
                                 | |
| 60 | 3 | 
                                    
                                    0.2%
                                 | |
| 65 | 1 | 
                                    
                                    0.1%
                                 | |
| 70 | 5 | 
                                    
                                    0.4%
                                 | |
| 75 | 2 | 
                                    
                                    0.1%
                                 | |
| 80 | 2 | 
                                    
                                    0.1%
                                 | |
| 90 | 1 | 
                                    
                                    0.1%
                                 | |
| 95 | 1 | 
                                    
                                    0.1%
                                 | |
| 100 | 64 | 
                                    
                                    4.5%
                                 |