| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    
| 10 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 15 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 20 | 2 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 25 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 30 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 35 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 40 | 3 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    |
| 45 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 47 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 48 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 50 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 55 | 2 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 60 | 5 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    |
| 65 | 3 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    |
| 70 | 9 | 
                                                                 
                                    
                                    9.7%
                                 
                                                             | 
                                                        
                    |
| 74 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 75 | 12 | 
                                                                 
                                    
                                    12.9%
                                 
                                                             | 
                                                        
                    |
| 76 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 78 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 80 | 11 | 
                                                                 
                                    
                                    11.8%
                                 
                                                             | 
                                                        
                    |
| 85 | 6 | 
                                                                 
                                    
                                    6.5%
                                 
                                                             | 
                                                        
                    |
| 90 | 5 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    |
| 95 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 98 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 100 | 18 | 
                                                                 
                                    
                                    19.4%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 287 |