| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 25 | 
                                    
                                    1.8%
                                 | 
| 0 | 593 | 
                                    
                                    41.9%
                                 | |
| 1 | 10 | 
                                    
                                    0.7%
                                 | |
| 2 | 1 | 
                                    
                                    0.1%
                                 | |
| 3 | 2 | 
                                    
                                    0.1%
                                 | |
| 5 | 4 | 
                                    
                                    0.3%
                                 | |
| 6 | 2 | 
                                    
                                    0.1%
                                 | |
| 10 | 10 | 
                                    
                                    0.7%
                                 | |
| 15 | 2 | 
                                    
                                    0.1%
                                 | |
| 20 | 6 | 
                                    
                                    0.4%
                                 | |
| 25 | 2 | 
                                    
                                    0.1%
                                 | |
| 30 | 6 | 
                                    
                                    0.4%
                                 | |
| 35 | 1 | 
                                    
                                    0.1%
                                 | |
| 40 | 4 | 
                                    
                                    0.3%
                                 | |
| 50 | 36 | 
                                    
                                    2.5%
                                 | |
| 60 | 5 | 
                                    
                                    0.4%
                                 | |
| 65 | 1 | 
                                    
                                    0.1%
                                 | |
| 66 | 1 | 
                                    
                                    0.1%
                                 | |
| 70 | 10 | 
                                    
                                    0.7%
                                 | |
| 75 | 2 | 
                                    
                                    0.1%
                                 | |
| 80 | 6 | 
                                    
                                    0.4%
                                 | |
| 85 | 3 | 
                                    
                                    0.2%
                                 | |
| 90 | 5 | 
                                    
                                    0.4%
                                 | |
| 100 | 679 | 
                                    
                                    48%
                                 |