| Value | Category | Cases | |
|---|---|---|---|
| 1 | Now | 6 | 
                                
                                1.7%
                             | 
| 2 | Later | 3 | 
                                
                                0.8%
                             | 
| 3 | Not at all | 1 | 
                                
                                0.3%
                             | 
| 5 | Missing | 0 | 
                                
                                0%
                             | 
| 7 | Refusal | 0 | 
                                
                                0%
                             | 
| 9 | Not applicable | 343 | 
                                
                                97.2%
                             |