| Value | Category | Cases | |
|---|---|---|---|
| 1 | most of them | 139 | 
                                    
                                    4.3%
                                 | 
| 2 | about half of them | 207 | 
                                    
                                    6.4%
                                 | 
| 3 | some of them | 117 | 
                                    
                                    3.6%
                                 | 
| 4 | none of them | 2789 | 
                                    
                                    85.8%
                                 | 
| Sysmiss | 61 |