| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 467 | 
                                    
                                    38.9%
                                 | 
| 1 | Once or twice | 43 | 
                                    
                                    3.6%
                                 | 
| 2 | A few times | 21 | 
                                    
                                    1.8%
                                 | 
| 3 | Often | 32 | 
                                    
                                    2.7%
                                 | 
| 7 | Not applicable | 636 | 
                                    
                                    53%
                                 | 
| 8 | Refused | 1 | 
                                    
                                    0.1%
                                 | 
| 9 | Don't know | 0 | 
                                    
                                    0%
                                 |