| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 41 | 
                                    
                                    2.9%
                                 | 
| 0 | 1068 | 
                                    
                                    75.4%
                                 | |
| 1 | 2 | 
                                    
                                    0.1%
                                 | |
| 2 | 1 | 
                                    
                                    0.1%
                                 | |
| 3 | 3 | 
                                    
                                    0.2%
                                 | |
| 5 | 10 | 
                                    
                                    0.7%
                                 | |
| 10 | 39 | 
                                    
                                    2.8%
                                 | |
| 15 | 10 | 
                                    
                                    0.7%
                                 | |
| 18 | 1 | 
                                    
                                    0.1%
                                 | |
| 20 | 85 | 
                                    
                                    6%
                                 | |
| 25 | 12 | 
                                    
                                    0.8%
                                 | |
| 27 | 1 | 
                                    
                                    0.1%
                                 | |
| 30 | 42 | 
                                    
                                    3%
                                 | |
| 35 | 3 | 
                                    
                                    0.2%
                                 | |
| 40 | 28 | 
                                    
                                    2%
                                 | |
| 45 | 1 | 
                                    
                                    0.1%
                                 | |
| 50 | 32 | 
                                    
                                    2.3%
                                 | |
| 60 | 11 | 
                                    
                                    0.8%
                                 | |
| 65 | 2 | 
                                    
                                    0.1%
                                 | |
| 70 | 4 | 
                                    
                                    0.3%
                                 | |
| 75 | 3 | 
                                    
                                    0.2%
                                 | |
| 80 | 4 | 
                                    
                                    0.3%
                                 | |
| 85 | 2 | 
                                    
                                    0.1%
                                 | |
| 90 | 2 | 
                                    
                                    0.1%
                                 | |
| 95 | 1 | 
                                    
                                    0.1%
                                 | |
| 100 | 8 | 
                                    
                                    0.6%
                                 |