| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 | 
                                    
                                    3.8%
                                 | |
| 1 | 7 | 
                                    
                                    26.9%
                                 | |
| 2 | 10 | 
                                    
                                    38.5%
                                 | |
| 3 | 6 | 
                                    
                                    23.1%
                                 | |
| 4 | 2 | 
                                    
                                    7.7%
                                 | |
| Sysmiss | 131 |