| Value | Category | Cases | |
|---|---|---|---|
| 1 | 4 | 
                                    
                                    9.1%
                                 | |
| 2 | 11 | 
                                    
                                    25%
                                 | |
| 3 | 28 | 
                                    
                                    63.6%
                                 | |
| 99 | 1 | 
                                    
                                    2.3%
                                 | |
| Sysmiss | 28 |