| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 | 
                                    
                                    20%
                                 | 
| 1500 | 2 | 
                                    
                                    5.7%
                                 | |
| 2000 | 4 | 
                                    
                                    11.4%
                                 | |
| 3000 | 2 | 
                                    
                                    5.7%
                                 | |
| 3800 | 1 | 
                                    
                                    2.9%
                                 | |
| 5000 | 6 | 
                                    
                                    17.1%
                                 | |
| 6000 | 1 | 
                                    
                                    2.9%
                                 | |
| 7000 | 1 | 
                                    
                                    2.9%
                                 | |
| 8000 | 2 | 
                                    
                                    5.7%
                                 | |
| 10000 | 3 | 
                                    
                                    8.6%
                                 | |
| 15000 | 1 | 
                                    
                                    2.9%
                                 | |
| 20000 | 1 | 
                                    
                                    2.9%
                                 | |
| 50000 | 1 | 
                                    
                                    2.9%
                                 | |
| 55000 | 1 | 
                                    
                                    2.9%
                                 | |
| 70000 | 1 | 
                                    
                                    2.9%
                                 | |
| 100000 | 1 | 
                                    
                                    2.9%
                                 | |
| Sysmiss | 367 |