| Value | Category | Cases | |
|---|---|---|---|
| 0 | 4 | 
                                    
                                    1.4%
                                 | |
| 1 | 17 | 
                                    
                                    6.1%
                                 | |
| 2 | 257 | 
                                    
                                    92.4%
                                 | |
| Sysmiss | 8 |