| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 | 
                                    
                                    11.1%
                                 | 
| 0 | 10 | 
                                    
                                    13.9%
                                 | |
| 140 | 1 | 
                                    
                                    1.4%
                                 | |
| 250 | 1 | 
                                    
                                    1.4%
                                 | |
| 300 | 2 | 
                                    
                                    2.8%
                                 | |
| 350 | 1 | 
                                    
                                    1.4%
                                 | |
| 400 | 1 | 
                                    
                                    1.4%
                                 | |
| 500 | 3 | 
                                    
                                    4.2%
                                 | |
| 600 | 1 | 
                                    
                                    1.4%
                                 | |
| 650 | 2 | 
                                    
                                    2.8%
                                 | |
| 700 | 1 | 
                                    
                                    1.4%
                                 | |
| 750 | 1 | 
                                    
                                    1.4%
                                 | |
| 1000 | 7 | 
                                    
                                    9.7%
                                 | |
| 1400 | 1 | 
                                    
                                    1.4%
                                 | |
| 1500 | 2 | 
                                    
                                    2.8%
                                 | |
| 2000 | 3 | 
                                    
                                    4.2%
                                 | |
| 2200 | 1 | 
                                    
                                    1.4%
                                 | |
| 2500 | 2 | 
                                    
                                    2.8%
                                 | |
| 2800 | 1 | 
                                    
                                    1.4%
                                 | |
| 2900 | 1 | 
                                    
                                    1.4%
                                 | |
| 3000 | 3 | 
                                    
                                    4.2%
                                 | |
| 3500 | 2 | 
                                    
                                    2.8%
                                 | |
| 4000 | 3 | 
                                    
                                    4.2%
                                 | |
| 5000 | 4 | 
                                    
                                    5.6%
                                 | |
| 7000 | 1 | 
                                    
                                    1.4%
                                 | |
| 8000 | 1 | 
                                    
                                    1.4%
                                 | |
| 8500 | 1 | 
                                    
                                    1.4%
                                 | |
| 10000 | 3 | 
                                    
                                    4.2%
                                 | |
| 15000 | 1 | 
                                    
                                    1.4%
                                 | |
| 20000 | 1 | 
                                    
                                    1.4%
                                 | |
| 30000 | 1 | 
                                    
                                    1.4%
                                 | |
| 150000 | 1 | 
                                    
                                    1.4%
                                 | |
| Sysmiss | 1344 |