| Value | Category | Cases | |
|---|---|---|---|
| 0 | 33 | 
                                    
                                    28.9%
                                 | |
| 1 | 71 | 
                                    
                                    62.3%
                                 | |
| 2 | 9 | 
                                    
                                    7.9%
                                 | |
| 4 | 1 | 
                                    
                                    0.9%
                                 | |
| Sysmiss | 3420 |