| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                    
                                    1.6%
                                 | 
| 10 | 1 | 
                                    
                                    0.3%
                                 | |
| 30 | 2 | 
                                    
                                    0.6%
                                 | |
| 35 | 1 | 
                                    
                                    0.3%
                                 | |
| 40 | 2 | 
                                    
                                    0.6%
                                 | |
| 45 | 1 | 
                                    
                                    0.3%
                                 | |
| 50 | 7 | 
                                    
                                    2.3%
                                 | |
| 55 | 5 | 
                                    
                                    1.6%
                                 | |
| 60 | 7 | 
                                    
                                    2.3%
                                 | |
| 61 | 1 | 
                                    
                                    0.3%
                                 | |
| 65 | 2 | 
                                    
                                    0.6%
                                 | |
| 70 | 20 | 
                                    
                                    6.4%
                                 | |
| 75 | 1 | 
                                    
                                    0.3%
                                 | |
| 78 | 1 | 
                                    
                                    0.3%
                                 | |
| 80 | 17 | 
                                    
                                    5.5%
                                 | |
| 85 | 1 | 
                                    
                                    0.3%
                                 | |
| 90 | 14 | 
                                    
                                    4.5%
                                 | |
| 93 | 1 | 
                                    
                                    0.3%
                                 | |
| 95 | 7 | 
                                    
                                    2.3%
                                 | |
| 97 | 1 | 
                                    
                                    0.3%
                                 | |
| 98 | 1 | 
                                    
                                    0.3%
                                 | |
| 99 | 1 | 
                                    
                                    0.3%
                                 | |
| 100 | 212 | 
                                    
                                    68.2%
                                 |