| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 154 | 
                                    
                                    22.3%
                                 | 
| 1 | 1 | 303 | 
                                    
                                    43.8%
                                 | 
| 2 | 2 | 191 | 
                                    
                                    27.6%
                                 | 
| 3 | 3 | 44 | 
                                    
                                    6.4%
                                 | 
| Sysmiss | 2949 |