| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 1095 | 
                                    
                                    91.3%
                                 | 
| 1 | Only once | 27 | 
                                    
                                    2.3%
                                 | 
| 2 | A few times | 55 | 
                                    
                                    4.6%
                                 | 
| 3 | Often | 21 | 
                                    
                                    1.8%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don’t know | 2 | 
                                    
                                    0.2%
                                 |