| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 | 
                                    
                                    2.8%
                                 | 
| 0 | 25 | 
                                    
                                    6.9%
                                 | |
| 2 | 2 | 
                                    
                                    0.6%
                                 | |
| 3 | 1 | 
                                    
                                    0.3%
                                 | |
| 5 | 3 | 
                                    
                                    0.8%
                                 | |
| 10 | 12 | 
                                    
                                    3.3%
                                 | |
| 15 | 3 | 
                                    
                                    0.8%
                                 | |
| 20 | 21 | 
                                    
                                    5.8%
                                 | |
| 30 | 16 | 
                                    
                                    4.4%
                                 | |
| 35 | 3 | 
                                    
                                    0.8%
                                 | |
| 40 | 9 | 
                                    
                                    2.5%
                                 | |
| 50 | 63 | 
                                    
                                    17.4%
                                 | |
| 60 | 21 | 
                                    
                                    5.8%
                                 | |
| 70 | 34 | 
                                    
                                    9.4%
                                 | |
| 75 | 1 | 
                                    
                                    0.3%
                                 | |
| 80 | 45 | 
                                    
                                    12.4%
                                 | |
| 85 | 2 | 
                                    
                                    0.6%
                                 | |
| 90 | 38 | 
                                    
                                    10.5%
                                 | |
| 95 | 7 | 
                                    
                                    1.9%
                                 | |
| 96 | 1 | 
                                    
                                    0.3%
                                 | |
| 99 | 1 | 
                                    
                                    0.3%
                                 | |
| 100 | 45 | 
                                    
                                    12.4%
                                 |