| Value | Category | Cases | |
|---|---|---|---|
| 0 | 8 | 
                                    
                                    17%
                                 | |
| 1 | 19 | 
                                    
                                    40.4%
                                 | |
| 2 | 15 | 
                                    
                                    31.9%
                                 | |
| 3 | 4 | 
                                    
                                    8.5%
                                 | |
| 4 | 1 | 
                                    
                                    2.1%
                                 | |
| Sysmiss | 3487 |