| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 41 | 
                                    
                                    35.3%
                                 | 
| 0 | 37 | 
                                    
                                    31.9%
                                 | |
| 500 | 1 | 
                                    
                                    0.9%
                                 | |
| 750 | 1 | 
                                    
                                    0.9%
                                 | |
| 800 | 1 | 
                                    
                                    0.9%
                                 | |
| 1000 | 3 | 
                                    
                                    2.6%
                                 | |
| 1500 | 1 | 
                                    
                                    0.9%
                                 | |
| 2000 | 1 | 
                                    
                                    0.9%
                                 | |
| 3000 | 3 | 
                                    
                                    2.6%
                                 | |
| 4000 | 1 | 
                                    
                                    0.9%
                                 | |
| 5000 | 11 | 
                                    
                                    9.5%
                                 | |
| 10000 | 4 | 
                                    
                                    3.4%
                                 | |
| 12000 | 1 | 
                                    
                                    0.9%
                                 | |
| 15000 | 2 | 
                                    
                                    1.7%
                                 | |
| 20000 | 2 | 
                                    
                                    1.7%
                                 | |
| 25000 | 1 | 
                                    
                                    0.9%
                                 | |
| 150000 | 1 | 
                                    
                                    0.9%
                                 | |
| 200000 | 1 | 
                                    
                                    0.9%
                                 | |
| 300000 | 1 | 
                                    
                                    0.9%
                                 | |
| 800000 | 1 | 
                                    
                                    0.9%
                                 | |
| 3000000 | 1 | 
                                    
                                    0.9%
                                 | |
| Sysmiss | 484 |