| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 0 | 64 | 
                                                                 
                                    
                                    17.8%
                                 
                                                             | 
                                                        
                    |
| 3 | 3 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 5 | 5 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 8 | 2 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 9 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 10 | 10 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 15 | 5 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 20 | 23 | 
                                                                 
                                    
                                    6.4%
                                 
                                                             | 
                                                        
                    |
| 25 | 7 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 30 | 18 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 40 | 16 | 
                                                                 
                                    
                                    4.4%
                                 
                                                             | 
                                                        
                    |
| 45 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 50 | 45 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    |
| 60 | 13 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    |
| 65 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 70 | 19 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 80 | 16 | 
                                                                 
                                    
                                    4.4%
                                 
                                                             | 
                                                        
                    |
| 85 | 4 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 90 | 18 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 95 | 2 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 98 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 99 | 2 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 100 | 79 | 
                                                                 
                                    
                                    21.9%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 232 |