| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 24 | 
                                    
                                    15.8%
                                 | 
| 0 | None | 71 | 
                                    
                                    46.7%
                                 | 
| 100 | 2 | 
                                    
                                    1.3%
                                 | |
| 200 | 1 | 
                                    
                                    0.7%
                                 | |
| 300 | 3 | 
                                    
                                    2%
                                 | |
| 350 | 1 | 
                                    
                                    0.7%
                                 | |
| 500 | 2 | 
                                    
                                    1.3%
                                 | |
| 600 | 2 | 
                                    
                                    1.3%
                                 | |
| 1000 | 2 | 
                                    
                                    1.3%
                                 | |
| 1500 | 5 | 
                                    
                                    3.3%
                                 | |
| 2000 | 5 | 
                                    
                                    3.3%
                                 | |
| 2500 | 2 | 
                                    
                                    1.3%
                                 | |
| 3000 | 3 | 
                                    
                                    2%
                                 | |
| 4000 | 2 | 
                                    
                                    1.3%
                                 | |
| 5000 | 9 | 
                                    
                                    5.9%
                                 | |
| 10000 | 4 | 
                                    
                                    2.6%
                                 | |
| 20000 | 2 | 
                                    
                                    1.3%
                                 | |
| 26923 | 1 | 
                                    
                                    0.7%
                                 | |
| 30000 | 1 | 
                                    
                                    0.7%
                                 | |
| 32000 | 1 | 
                                    
                                    0.7%
                                 | |
| 35000 | 1 | 
                                    
                                    0.7%
                                 | |
| 40000 | 1 | 
                                    
                                    0.7%
                                 | |
| 70000 | 1 | 
                                    
                                    0.7%
                                 | |
| 100000 | 5 | 
                                    
                                    3.3%
                                 | |
| 250000 | 1 | 
                                    
                                    0.7%
                                 | |
| Sysmiss | 803 |