| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 699 | 
                                    
                                    58.3%
                                 | 
| 1 | Only once | 66 | 
                                    
                                    5.5%
                                 | 
| 2 | A few times | 230 | 
                                    
                                    19.2%
                                 | 
| 3 | Often | 204 | 
                                    
                                    17%
                                 | 
| 9 | Don't know | 1 | 
                                    
                                    0.1%
                                 | 
| 98 | Refused | 0 | 
                                    
                                    0%
                                 |