| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | None | 1 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    
| 80 | 1 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 1000 | 2 | 
                                                                 
                                    
                                    10.5%
                                 
                                                             | 
                                                        
                    |
| 1200 | 1 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 1500 | 1 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 2700 | 1 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 3000 | 2 | 
                                                                 
                                    
                                    10.5%
                                 
                                                             | 
                                                        
                    |
| 4500 | 1 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 5000 | 1 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 6000 | 2 | 
                                                                 
                                    
                                    10.5%
                                 
                                                             | 
                                                        
                    |
| 8000 | 1 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 10000 | 3 | 
                                                                 
                                    
                                    15.8%
                                 
                                                             | 
                                                        
                    |
| 30000 | 2 | 
                                                                 
                                    
                                    10.5%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 590 |