| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 1704 | 
                                    
                                    71%
                                 | 
| 1 | Only once | 173 | 
                                    
                                    7.2%
                                 | 
| 2 | A few times | 314 | 
                                    
                                    13.1%
                                 | 
| 3 | Often | 200 | 
                                    
                                    8.3%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don’t know | 9 | 
                                    
                                    0.4%
                                 |