| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 1893 | 
                                    
                                    78.9%
                                 | 
| 1 | Only once | 147 | 
                                    
                                    6.1%
                                 | 
| 2 | A few times | 249 | 
                                    
                                    10.4%
                                 | 
| 3 | Often | 104 | 
                                    
                                    4.3%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don’t know | 7 | 
                                    
                                    0.3%
                                 |