| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 | 
                                                                 
                                    
                                    6.4%
                                 
                                                             | 
                                                        
                    
| 0 | 23 | 
                                                                 
                                    
                                    9.9%
                                 
                                                             | 
                                                        
                    |
| 5 | 2 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    |
| 10 | 11 | 
                                                                 
                                    
                                    4.7%
                                 
                                                             | 
                                                        
                    |
| 20 | 12 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    |
| 25 | 9 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    |
| 30 | 9 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    |
| 35 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 40 | 10 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 50 | 27 | 
                                                                 
                                    
                                    11.6%
                                 
                                                             | 
                                                        
                    |
| 60 | 15 | 
                                                                 
                                    
                                    6.4%
                                 
                                                             | 
                                                        
                    |
| 65 | 2 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    |
| 70 | 8 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             | 
                                                        
                    |
| 75 | 3 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 80 | 5 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    |
| 85 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 86 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 90 | 3 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 100 | 76 | 
                                                                 
                                    
                                    32.6%
                                 
                                                             |