| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                    
                                    0.8%
                                 | 
| 0 | 17 | 
                                    
                                    4.7%
                                 | |
| 1 | 5 | 
                                    
                                    1.4%
                                 | |
| 2 | 1 | 
                                    
                                    0.3%
                                 | |
| 3 | 1 | 
                                    
                                    0.3%
                                 | |
| 5 | 10 | 
                                    
                                    2.8%
                                 | |
| 8 | 1 | 
                                    
                                    0.3%
                                 | |
| 10 | 15 | 
                                    
                                    4.1%
                                 | |
| 15 | 2 | 
                                    
                                    0.6%
                                 | |
| 20 | 27 | 
                                    
                                    7.4%
                                 | |
| 30 | 31 | 
                                    
                                    8.5%
                                 | |
| 40 | 17 | 
                                    
                                    4.7%
                                 | |
| 45 | 1 | 
                                    
                                    0.3%
                                 | |
| 50 | 68 | 
                                    
                                    18.7%
                                 | |
| 60 | 20 | 
                                    
                                    5.5%
                                 | |
| 70 | 39 | 
                                    
                                    10.7%
                                 | |
| 75 | 1 | 
                                    
                                    0.3%
                                 | |
| 80 | 32 | 
                                    
                                    8.8%
                                 | |
| 90 | 31 | 
                                    
                                    8.5%
                                 | |
| 95 | 6 | 
                                    
                                    1.7%
                                 | |
| 98 | 1 | 
                                    
                                    0.3%
                                 | |
| 99 | 1 | 
                                    
                                    0.3%
                                 | |
| 100 | 33 | 
                                    
                                    9.1%
                                 |