| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 43 | 
                                                                 
                                    
                                    14%
                                 
                                                             | 
                                                        
                    
| 0 | 9 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 1 | 4 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 3 | 2 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 4 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 5 | 4 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 7 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 10 | 8 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    |
| 12 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 13 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 15 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 20 | 3 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 30 | 6 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    |
| 35 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 40 | 6 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    |
| 45 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 50 | 16 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    |
| 60 | 12 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    |
| 70 | 6 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    |
| 75 | 3 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 80 | 27 | 
                                                                 
                                    
                                    8.8%
                                 
                                                             | 
                                                        
                    |
| 85 | 3 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 90 | 30 | 
                                                                 
                                    
                                    9.8%
                                 
                                                             | 
                                                        
                    |
| 95 | 22 | 
                                                                 
                                    
                                    7.2%
                                 
                                                             | 
                                                        
                    |
| 97 | 3 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 98 | 10 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    |
| 99 | 19 | 
                                                                 
                                    
                                    6.2%
                                 
                                                             | 
                                                        
                    |
| 100 | 64 | 
                                                                 
                                    
                                    20.8%
                                 
                                                             |