| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 23 | 
                                    
                                    1.6%
                                 | 
| 0 | 1299 | 
                                    
                                    91.7%
                                 | |
| 2 | 5 | 
                                    
                                    0.4%
                                 | |
| 3 | 2 | 
                                    
                                    0.1%
                                 | |
| 5 | 12 | 
                                    
                                    0.8%
                                 | |
| 10 | 18 | 
                                    
                                    1.3%
                                 | |
| 12 | 1 | 
                                    
                                    0.1%
                                 | |
| 15 | 2 | 
                                    
                                    0.1%
                                 | |
| 19 | 1 | 
                                    
                                    0.1%
                                 | |
| 20 | 13 | 
                                    
                                    0.9%
                                 | |
| 25 | 4 | 
                                    
                                    0.3%
                                 | |
| 30 | 10 | 
                                    
                                    0.7%
                                 | |
| 40 | 7 | 
                                    
                                    0.5%
                                 | |
| 42 | 1 | 
                                    
                                    0.1%
                                 | |
| 45 | 1 | 
                                    
                                    0.1%
                                 | |
| 50 | 5 | 
                                    
                                    0.4%
                                 | |
| 59 | 1 | 
                                    
                                    0.1%
                                 | |
| 60 | 2 | 
                                    
                                    0.1%
                                 | |
| 70 | 3 | 
                                    
                                    0.2%
                                 | |
| 80 | 1 | 
                                    
                                    0.1%
                                 | |
| 99 | 1 | 
                                    
                                    0.1%
                                 | |
| 100 | 4 | 
                                    
                                    0.3%
                                 |