| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 | 
                                    
                                    3.3%
                                 | 
| 0 | 22 | 
                                    
                                    10.2%
                                 | |
| 1 | 2 | 
                                    
                                    0.9%
                                 | |
| 4 | 1 | 
                                    
                                    0.5%
                                 | |
| 5 | 11 | 
                                    
                                    5.1%
                                 | |
| 10 | 20 | 
                                    
                                    9.3%
                                 | |
| 11 | 1 | 
                                    
                                    0.5%
                                 | |
| 15 | 8 | 
                                    
                                    3.7%
                                 | |
| 20 | 13 | 
                                    
                                    6%
                                 | |
| 25 | 7 | 
                                    
                                    3.3%
                                 | |
| 30 | 13 | 
                                    
                                    6%
                                 | |
| 35 | 3 | 
                                    
                                    1.4%
                                 | |
| 40 | 19 | 
                                    
                                    8.8%
                                 | |
| 45 | 1 | 
                                    
                                    0.5%
                                 | |
| 50 | 6 | 
                                    
                                    2.8%
                                 | |
| 60 | 7 | 
                                    
                                    3.3%
                                 | |
| 65 | 1 | 
                                    
                                    0.5%
                                 | |
| 70 | 3 | 
                                    
                                    1.4%
                                 | |
| 80 | 9 | 
                                    
                                    4.2%
                                 | |
| 85 | 1 | 
                                    
                                    0.5%
                                 | |
| 90 | 3 | 
                                    
                                    1.4%
                                 | |
| 91 | 1 | 
                                    
                                    0.5%
                                 | |
| 94 | 1 | 
                                    
                                    0.5%
                                 | |
| 95 | 3 | 
                                    
                                    1.4%
                                 | |
| 100 | 52 | 
                                    
                                    24.2%
                                 |