| Value | Category | Cases | |
|---|---|---|---|
| 1 | Now | 14 | 
                                
                                0.4%
                             | 
| 2 | Later | 30 | 
                                
                                0.8%
                             | 
| 3 | Not at all | 7 | 
                                
                                0.2%
                             | 
| 5 | Missing | 78 | 
                                
                                2%
                             | 
| 7 | Refusal | 0 | 
                                
                                0%
                             | 
| 9 | Not applicable | 3823 | 
                                
                                96.7%
                             |