| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 | 
                                    
                                    26.3%
                                 | 
| 0 | 4 | 
                                    
                                    10.5%
                                 | |
| 4 | 1 | 
                                    
                                    2.6%
                                 | |
| 20 | 1 | 
                                    
                                    2.6%
                                 | |
| 200 | 1 | 
                                    
                                    2.6%
                                 | |
| 300 | 1 | 
                                    
                                    2.6%
                                 | |
| 500 | 1 | 
                                    
                                    2.6%
                                 | |
| 1000 | 1 | 
                                    
                                    2.6%
                                 | |
| 1500 | 2 | 
                                    
                                    5.3%
                                 | |
| 3000 | 1 | 
                                    
                                    2.6%
                                 | |
| 7000 | 1 | 
                                    
                                    2.6%
                                 | |
| 10000 | 2 | 
                                    
                                    5.3%
                                 | |
| 15000 | 2 | 
                                    
                                    5.3%
                                 | |
| 20000 | 1 | 
                                    
                                    2.6%
                                 | |
| 30000 | 1 | 
                                    
                                    2.6%
                                 | |
| 45000 | 1 | 
                                    
                                    2.6%
                                 | |
| 50000 | 5 | 
                                    
                                    13.2%
                                 | |
| 100000 | 1 | 
                                    
                                    2.6%
                                 | |
| 300000 | 1 | 
                                    
                                    2.6%
                                 | |
| Sysmiss | 73 |