| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 94 | 
                                    
                                    48%
                                 | 
| 0 | 21 | 
                                    
                                    10.7%
                                 | |
| 50 | 1 | 
                                    
                                    0.5%
                                 | |
| 100 | 3 | 
                                    
                                    1.5%
                                 | |
| 200 | 1 | 
                                    
                                    0.5%
                                 | |
| 300 | 1 | 
                                    
                                    0.5%
                                 | |
| 350 | 1 | 
                                    
                                    0.5%
                                 | |
| 500 | 3 | 
                                    
                                    1.5%
                                 | |
| 700 | 1 | 
                                    
                                    0.5%
                                 | |
| 1000 | 8 | 
                                    
                                    4.1%
                                 | |
| 1100 | 1 | 
                                    
                                    0.5%
                                 | |
| 1500 | 1 | 
                                    
                                    0.5%
                                 | |
| 2000 | 4 | 
                                    
                                    2%
                                 | |
| 2500 | 2 | 
                                    
                                    1%
                                 | |
| 3000 | 4 | 
                                    
                                    2%
                                 | |
| 4500 | 2 | 
                                    
                                    1%
                                 | |
| 5000 | 5 | 
                                    
                                    2.6%
                                 | |
| 6000 | 3 | 
                                    
                                    1.5%
                                 | |
| 7000 | 1 | 
                                    
                                    0.5%
                                 | |
| 8000 | 2 | 
                                    
                                    1%
                                 | |
| 10000 | 5 | 
                                    
                                    2.6%
                                 | |
| 11000 | 1 | 
                                    
                                    0.5%
                                 | |
| 12000 | 1 | 
                                    
                                    0.5%
                                 | |
| 12500 | 1 | 
                                    
                                    0.5%
                                 | |
| 15000 | 6 | 
                                    
                                    3.1%
                                 | |
| 17000 | 1 | 
                                    
                                    0.5%
                                 | |
| 20000 | 2 | 
                                    
                                    1%
                                 | |
| 25000 | 1 | 
                                    
                                    0.5%
                                 | |
| 27500 | 1 | 
                                    
                                    0.5%
                                 | |
| 30000 | 10 | 
                                    
                                    5.1%
                                 | |
| 45000 | 1 | 
                                    
                                    0.5%
                                 | |
| 60000 | 1 | 
                                    
                                    0.5%
                                 | |
| 70000 | 1 | 
                                    
                                    0.5%
                                 | |
| 80000 | 1 | 
                                    
                                    0.5%
                                 | |
| 200000 | 1 | 
                                    
                                    0.5%
                                 | |
| 250000 | 1 | 
                                    
                                    0.5%
                                 | |
| 300000 | 1 | 
                                    
                                    0.5%
                                 | |
| 400000 | 1 | 
                                    
                                    0.5%
                                 | |
| Sysmiss | 2501 |