| Value | Category | Cases | |
|---|---|---|---|
| 1 | None of them | 1793 | 
                                    
                                    47.8%
                                 | 
| 2 | Some of them | 1621 | 
                                    
                                    43.2%
                                 | 
| 3 | Most of them | 285 | 
                                    
                                    7.6%
                                 | 
| 4 | All of them | 53 | 
                                    
                                    1.4%
                                 | 
| Sysmiss | 15 |