| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 99 | 
                                    
                                    8.3%
                                 | 
| 1 | Once or twice | 54 | 
                                    
                                    4.5%
                                 | 
| 2 | A few times | 104 | 
                                    
                                    8.7%
                                 | 
| 3 | Often | 301 | 
                                    
                                    25.1%
                                 | 
| 7 | Not applicable | 636 | 
                                    
                                    53%
                                 | 
| 8 | Refuse to answer | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't know | 6 | 
                                    
                                    0.5%
                                 |