| Value | Category | Cases | |
|---|---|---|---|
| 0 | 13 | 
                                    
                                    72.2%
                                 | |
| 1 | 1 | 
                                    
                                    5.6%
                                 | |
| 2 | 4 | 
                                    
                                    22.2%
                                 | |
| Sysmiss | 606 |