| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 379 | 
                                    
                                    31.6%
                                 | 
| 1 | Once or twice | 35 | 
                                    
                                    2.9%
                                 | 
| 2 | A few times | 30 | 
                                    
                                    2.5%
                                 | 
| 3 | Often | 35 | 
                                    
                                    2.9%
                                 | 
| 7 | Not applicable | 720 | 
                                    
                                    60%
                                 | 
| 8 | Refused | 1 | 
                                    
                                    0.1%
                                 | 
| 9 | Don't know | 0 | 
                                    
                                    0%
                                 |