| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 | 
                                    
                                    4.3%
                                 | 
| 0 | 26 | 
                                    
                                    7.4%
                                 | |
| 5 | 1 | 
                                    
                                    0.3%
                                 | |
| 10 | 3 | 
                                    
                                    0.9%
                                 | |
| 13 | 1 | 
                                    
                                    0.3%
                                 | |
| 20 | 2 | 
                                    
                                    0.6%
                                 | |
| 25 | 2 | 
                                    
                                    0.6%
                                 | |
| 30 | 13 | 
                                    
                                    3.7%
                                 | |
| 40 | 4 | 
                                    
                                    1.1%
                                 | |
| 41 | 1 | 
                                    
                                    0.3%
                                 | |
| 50 | 19 | 
                                    
                                    5.4%
                                 | |
| 55 | 1 | 
                                    
                                    0.3%
                                 | |
| 60 | 6 | 
                                    
                                    1.7%
                                 | |
| 70 | 11 | 
                                    
                                    3.1%
                                 | |
| 80 | 7 | 
                                    
                                    2%
                                 | |
| 85 | 1 | 
                                    
                                    0.3%
                                 | |
| 90 | 9 | 
                                    
                                    2.6%
                                 | |
| 95 | 1 | 
                                    
                                    0.3%
                                 | |
| 100 | 228 | 
                                    
                                    65%
                                 | |
| Sysmiss | 261 |