| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 12 | 
                                    
                                    24.5%
                                 | 
| 32 | 1 | 
                                    
                                    2%
                                 | |
| 150 | 2 | 
                                    
                                    4.1%
                                 | |
| 200 | 1 | 
                                    
                                    2%
                                 | |
| 500 | 1 | 
                                    
                                    2%
                                 | |
| 600 | 1 | 
                                    
                                    2%
                                 | |
| 1000 | 5 | 
                                    
                                    10.2%
                                 | |
| 1700 | 1 | 
                                    
                                    2%
                                 | |
| 2000 | 5 | 
                                    
                                    10.2%
                                 | |
| 2440 | 1 | 
                                    
                                    2%
                                 | |
| 3000 | 1 | 
                                    
                                    2%
                                 | |
| 5000 | 4 | 
                                    
                                    8.2%
                                 | |
| 6000 | 1 | 
                                    
                                    2%
                                 | |
| 8000 | 1 | 
                                    
                                    2%
                                 | |
| 10000 | 3 | 
                                    
                                    6.1%
                                 | |
| 12000 | 1 | 
                                    
                                    2%
                                 | |
| 20000 | 1 | 
                                    
                                    2%
                                 | |
| 25000 | 2 | 
                                    
                                    4.1%
                                 | |
| 26000 | 1 | 
                                    
                                    2%
                                 | |
| 40000 | 2 | 
                                    
                                    4.1%
                                 | |
| 50000 | 2 | 
                                    
                                    4.1%
                                 | |
| Sysmiss | 353 |