| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                    
                                    1.3%
                                 | 
| 0 | 65 | 
                                    
                                    43.3%
                                 | |
| 2 | 1 | 
                                    
                                    0.7%
                                 | |
| 3 | 2 | 
                                    
                                    1.3%
                                 | |
| 5 | 3 | 
                                    
                                    2%
                                 | |
| 10 | 2 | 
                                    
                                    1.3%
                                 | |
| 15 | 3 | 
                                    
                                    2%
                                 | |
| 20 | 14 | 
                                    
                                    9.3%
                                 | |
| 25 | 4 | 
                                    
                                    2.7%
                                 | |
| 30 | 11 | 
                                    
                                    7.3%
                                 | |
| 35 | 3 | 
                                    
                                    2%
                                 | |
| 40 | 12 | 
                                    
                                    8%
                                 | |
| 45 | 2 | 
                                    
                                    1.3%
                                 | |
| 50 | 12 | 
                                    
                                    8%
                                 | |
| 60 | 5 | 
                                    
                                    3.3%
                                 | |
| 65 | 1 | 
                                    
                                    0.7%
                                 | |
| 70 | 2 | 
                                    
                                    1.3%
                                 | |
| 80 | 2 | 
                                    
                                    1.3%
                                 | |
| 90 | 3 | 
                                    
                                    2%
                                 | |
| 100 | 1 | 
                                    
                                    0.7%
                                 |