| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -8 | Refused | 2 | 
                                    
                                    0.1%
                                 | 
| -5 | Not Applicable | 0 | 
                                    
                                    0%
                                 | 
| -3 | Missing | 3713 | 
                                    
                                    99.9%
                                 | 
| -2 | Not asked in Phase 2 | 0 | 
                                    
                                    0%
                                 | 
| 900 | 1 | 
                                    
                                    0%
                                 | |
| 940 | 1 | 
                                    
                                    0%
                                 | |
| Sysmiss | 7576 |