| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 982 | 
                                    
                                    81.8%
                                 | 
| 1 | Only once | 62 | 
                                    
                                    5.2%
                                 | 
| 2 | A few times | 102 | 
                                    
                                    8.5%
                                 | 
| 3 | Often | 48 | 
                                    
                                    4%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don’t know | 6 | 
                                    
                                    0.5%
                                 |