| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 | 
                                    
                                    24.1%
                                 | 
| 18 | 1 | 
                                    
                                    1.2%
                                 | |
| 30 | 1 | 
                                    
                                    1.2%
                                 | |
| 36 | 1 | 
                                    
                                    1.2%
                                 | |
| 50 | 2 | 
                                    
                                    2.4%
                                 | |
| 60 | 2 | 
                                    
                                    2.4%
                                 | |
| 80 | 1 | 
                                    
                                    1.2%
                                 | |
| 100 | 3 | 
                                    
                                    3.6%
                                 | |
| 180 | 1 | 
                                    
                                    1.2%
                                 | |
| 200 | 7 | 
                                    
                                    8.4%
                                 | |
| 212 | 1 | 
                                    
                                    1.2%
                                 | |
| 220 | 1 | 
                                    
                                    1.2%
                                 | |
| 225 | 1 | 
                                    
                                    1.2%
                                 | |
| 270 | 1 | 
                                    
                                    1.2%
                                 | |
| 300 | 3 | 
                                    
                                    3.6%
                                 | |
| 350 | 1 | 
                                    
                                    1.2%
                                 | |
| 360 | 1 | 
                                    
                                    1.2%
                                 | |
| 384 | 1 | 
                                    
                                    1.2%
                                 | |
| 400 | 4 | 
                                    
                                    4.8%
                                 | |
| 418 | 1 | 
                                    
                                    1.2%
                                 | |
| 450 | 1 | 
                                    
                                    1.2%
                                 | |
| 500 | 2 | 
                                    
                                    2.4%
                                 | |
| 585 | 1 | 
                                    
                                    1.2%
                                 | |
| 600 | 2 | 
                                    
                                    2.4%
                                 | |
| 690 | 1 | 
                                    
                                    1.2%
                                 | |
| 700 | 5 | 
                                    
                                    6%
                                 | |
| 800 | 4 | 
                                    
                                    4.8%
                                 | |
| 900 | 1 | 
                                    
                                    1.2%
                                 | |
| 1000 | 1 | 
                                    
                                    1.2%
                                 | |
| 1600 | 1 | 
                                    
                                    1.2%
                                 | |
| 2500 | 1 | 
                                    
                                    1.2%
                                 | |
| 2600 | 1 | 
                                    
                                    1.2%
                                 | |
| 3000 | 1 | 
                                    
                                    1.2%
                                 | |
| 6000 | 3 | 
                                    
                                    3.6%
                                 | |
| 7000 | 2 | 
                                    
                                    2.4%
                                 | |
| 10000 | 1 | 
                                    
                                    1.2%
                                 | |
| 12000 | 1 | 
                                    
                                    1.2%
                                 | |
| Sysmiss | 281 |