| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    
| 0 | 91 | 
                                                                 
                                    
                                    43.5%
                                 
                                                             | 
                                                        
                    |
| 5 | 1 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 10 | 3 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 15 | 7 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    |
| 20 | 10 | 
                                                                 
                                    
                                    4.8%
                                 
                                                             | 
                                                        
                    |
| 25 | 4 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 30 | 9 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 40 | 4 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 45 | 1 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 50 | 6 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 60 | 1 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 70 | 4 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 75 | 1 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 80 | 7 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    |
| 90 | 3 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 95 | 8 | 
                                                                 
                                    
                                    3.8%
                                 
                                                             | 
                                                        
                    |
| 98 | 3 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 99 | 3 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 100 | 41 | 
                                                                 
                                    
                                    19.6%
                                 
                                                             |