| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | Never | 1470 | 
                                    
                                    61.3%
                                 | 
| 1 | Once or twice | 226 | 
                                    
                                    9.4%
                                 | 
| 2 | A few times | 274 | 
                                    
                                    11.4%
                                 | 
| 3 | Often | 423 | 
                                    
                                    17.6%
                                 | 
| 8 | Refused | 1 | 
                                    
                                    0%
                                 | 
| 9 | Don't know | 6 | 
                                    
                                    0.3%
                                 |