| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 21 | 
                                    
                                    41.2%
                                 | 
| 4000 | 1 | 
                                    
                                    2%
                                 | |
| 10000 | 4 | 
                                    
                                    7.8%
                                 | |
| 12000 | 1 | 
                                    
                                    2%
                                 | |
| 15000 | 4 | 
                                    
                                    7.8%
                                 | |
| 20000 | 3 | 
                                    
                                    5.9%
                                 | |
| 27000 | 1 | 
                                    
                                    2%
                                 | |
| 30000 | 3 | 
                                    
                                    5.9%
                                 | |
| 35000 | 3 | 
                                    
                                    5.9%
                                 | |
| 40000 | 1 | 
                                    
                                    2%
                                 | |
| 45000 | 3 | 
                                    
                                    5.9%
                                 | |
| 50000 | 1 | 
                                    
                                    2%
                                 | |
| 60000 | 1 | 
                                    
                                    2%
                                 | |
| 65000 | 1 | 
                                    
                                    2%
                                 | |
| 90000 | 1 | 
                                    
                                    2%
                                 | |
| 200000 | 1 | 
                                    
                                    2%
                                 | |
| 300000 | 1 | 
                                    
                                    2%
                                 | |
| Sysmiss | 60 |