| Value | Category | Cases | |
|---|---|---|---|
| -9 | 616 | 
                                
                                11.4%
                             | |
| 1 | Two are enough | 1 | 
                                
                                0%
                             | 
| 95 | Missing | 0 | 
                                
                                0%
                             | 
| 98 | Don't know | 0 | 
                                
                                0%
                             | 
| 99 | Not applicable | 4777 | 
                                
                                88.6%
                             |