| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 775 | 
                                    
                                    64.6%
                                 | 
| 1 | Only once | 65 | 
                                    
                                    5.4%
                                 | 
| 2 | A few times | 184 | 
                                    
                                    15.3%
                                 | 
| 3 | Often | 175 | 
                                    
                                    14.6%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don’t know | 1 | 
                                    
                                    0.1%
                                 |