| Value | Category | Cases | |
|---|---|---|---|
| 0 | 15 | 
                                    
                                    46.9%
                                 | |
| 1 | 11 | 
                                    
                                    34.4%
                                 | |
| 2 | 4 | 
                                    
                                    12.5%
                                 | |
| 4 | 1 | 
                                    
                                    3.1%
                                 | |
| 7 | 1 | 
                                    
                                    3.1%
                                 | |
| Sysmiss | 201 |