| Value | Category | Cases | |
|---|---|---|---|
| -9 | 3821 | 
                                
                                88%
                             | |
| 1 | Two are enough | 0 | 
                                
                                0%
                             | 
| 95 | Missing | 0 | 
                                
                                0%
                             | 
| 98 | Don't know | 0 | 
                                
                                0%
                             | 
| 99 | Not applicable | 519 | 
                                
                                12%
                             |