| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 65 | 
                                    
                                    5.4%
                                 | 
| 1 | Once or twice | 60 | 
                                    
                                    5%
                                 | 
| 2 | A few times | 110 | 
                                    
                                    9.2%
                                 | 
| 3 | Often | 329 | 
                                    
                                    27.4%
                                 | 
| 7 | Not applicable | 636 | 
                                    
                                    53%
                                 | 
| 8 | Refuse to answer | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't know | 0 | 
                                    
                                    0%
                                 |