| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 37 | 
                                    
                                    5.5%
                                 | 
| 1 | 1 | 143 | 
                                    
                                    21.3%
                                 | 
| 2 | 2 | 288 | 
                                    
                                    42.9%
                                 | 
| 3 | 3 | 203 | 
                                    
                                    30.3%
                                 | 
| Sysmiss | 2970 |