| Value | Category | Cases | |
|---|---|---|---|
| 1 | none of them | 3084 | 
                                    
                                    93.9%
                                 | 
| 2 | some of them | 136 | 
                                    
                                    4.1%
                                 | 
| 3 | most of them | 23 | 
                                    
                                    0.7%
                                 | 
| 4 | all of them | 40 | 
                                    
                                    1.2%
                                 | 
| Sysmiss | 30 |