| Value | Category | Cases | |
|---|---|---|---|
| -9 | 616 | 
                                
                                11.4%
                             | |
| 95 | Missing | 2 | 
                                
                                0%
                             | 
| 98 | Don't know | 0 | 
                                
                                0%
                             | 
| 99 | Not applicable | 4776 | 
                                
                                88.5%
                             |